[go: up one dir, main page]

WO2008140226A1 - Procédé de fabrication de fonte liquide contenant du nickel - Google Patents

Procédé de fabrication de fonte liquide contenant du nickel Download PDF

Info

Publication number
WO2008140226A1
WO2008140226A1 PCT/KR2008/002627 KR2008002627W WO2008140226A1 WO 2008140226 A1 WO2008140226 A1 WO 2008140226A1 KR 2008002627 W KR2008002627 W KR 2008002627W WO 2008140226 A1 WO2008140226 A1 WO 2008140226A1
Authority
WO
WIPO (PCT)
Prior art keywords
slag
material containing
boron oxide
blast furnace
alumina
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2008/002627
Other languages
English (en)
Inventor
Sung-Mo Seo
Chang-Hun Keum
Wan-Wook Huh
Joung-Mo Lee
Jeong-Sik Kim
Ju-Han Choi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Posco Holdings Inc
Original Assignee
Posco Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020070046244A external-priority patent/KR101322898B1/ko
Priority claimed from KR1020070046243A external-priority patent/KR101322897B1/ko
Priority claimed from KR1020070073694A external-priority patent/KR100948926B1/ko
Application filed by Posco Co Ltd filed Critical Posco Co Ltd
Priority to CN200880015301.4A priority Critical patent/CN101680042B/zh
Priority to JP2010507334A priority patent/JP5194111B2/ja
Publication of WO2008140226A1 publication Critical patent/WO2008140226A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/04—Making slag of special composition

Definitions

  • the present invention relates to a method for manufacturing molten iron containing nickel that is capable of improving fluidity of slag without using a fluorite.
  • the amount of slag in the blast furnace is about six times as much as that of the slag contained in general molten iron.
  • dolomite or fluorite is used, many problems occur in subsequent processes due to the fluorine contained in the fluorite.
  • the fluorine When the fluorite is charged into the blast furnace, the fluorine is gasified and then flows to a dust collector installed on the blast furnace. Therefore, the dust collector can be corroded due to the fluorine.
  • the fluorite contains the fluorine which is harmful to a human body, the slag cannot be reused if the fluorite is contained in the slag. That is, the slag cannot be reused due to an environmental pollution problem when the slag containing the fluorite is used as an oceanic structure.
  • an offgas discharged from the blast furnace contains the fluorine, the atmosphere can be polluted.
  • a method for manufacturing molten iron containing nickel that is capable of improving fluidity of slag without using fluorite is provided.
  • a method for manufacturing molten iron containing nickel includes: i) providing sintered nickel ore by sintering a nickel oxide ore; ii) charging a mixture containing the sintered nickel ore, coke, and at least one material selected from a group of a material containing boron oxide and a material containing alumina into a blast furnace; iii) manufacturing slag and molten iron containing nickel by injecting a hot gas into the blast furnace; and iv) tapping the slag and the molten iron containing nickel from the blast furnace.
  • the material may include a material containing boron oxide and a material containing alumina, and an amount of the material containing boron oxide and the material containing alumina is in a range of lwt% to 25wt% of the mixture during the charging of the mixture into the blast furnace.
  • the material may include the boron oxide and the material containing alumina during the charging of the mixture into the blast furnace.
  • the mixture in which the material containing boron oxide and the material containing alumina may be mixed together are charged into the blast furnace.
  • a weight ratio of the material containing boron oxide to the material containing alumina in the mixture may be in a range of 20:80 to 80:20.
  • the material may include the material containing boron oxide and the material containing alumina during the charging of the mixture into the blast furnace.
  • the material containing boron oxide may include B2O3 and the material containing alumina may include AI2O3.
  • the material may include the material containing boron oxide and the material containing alumina during the charging of the mixture into the blast furnace.
  • the amount of the boron oxide may be in a range of lwt% to 10wt% and the amount of the alumina may be in a range of 5wt% to 20wt% in the slag during the tapping of the slag and the molten iron containing nickel.
  • the melting point of the slag may be in a range of 1100 ° C to 1400 ° C .
  • the method for manufacturing molten iron containing nickel may further include injecting at least one type of fine particles selected from a group of fine boron oxide particles and fine alumina particles into the blast furnace through the side of the blast furnace.
  • the grain size of the fine particles may be in a range of 0.05mm to 0.2mm.
  • the material may include the material containing boron oxide and the material containing alumina during the charging of the mixture into the blast furnace, and the amount of the boron oxide contained in the material containing boron oxide may be in a range of 5wt% to 100wt% and the amount of the alumina in the material containing alumina may be in a range of 20wt% to 100wt%.
  • the material may include the material containing boron oxide and the material containing alumina during the charging of the mixture into the blast furnace.
  • the material containing boron oxide and the material containing alumina may be mixed to be charged into the blast furnace as the material.
  • the grain size of the material may be in a range of 0.2mm to 20mm.
  • the material may be the material containing boron oxide during the charging of the mixture into a blast furnace.
  • the amount of the material containing boron oxide may be in a range of lwt% to 25wt% of the mixture.
  • the material may be the material containing boron oxide including B2O3 during the charging of the mixture into the blast furnace.
  • the amount of the material containing boron oxide in the slag may be in a range of 1.5wt% to 40wt% during the tapping of the slag and the molten iron containing nickel.
  • the melting point of the slag may be in a range of 1100 ° C to 1430 0 C .
  • the material may be the material containing boron oxide during the charging of the mixture into the blast furnace.
  • the amount of the boron oxide included in the material containing boron oxide may be in a range of 5wt% to 100wt%.
  • the material may be the material containing boron oxide during the charging of the mixture into the blast furnace.
  • the grain size of the material containing boron oxide may be in a range of lmm to 20mm.
  • the material may be the material containing alumina during the charging of the mixture into the blast furnace.
  • the amount of the material containing alumina may be in a range of lwt% to 25wt% of the mixture.
  • the material may be the material containing alumina including AI2O3 during the charging of the mixture into the blast furnace.
  • the material may be the material containing alumina during the charging of the mixture into a blast furnace.
  • the amount of the alumina contained in the slag may be in a range of 2wt% to 16wt% during the tapping of the slag and the molten iron containing nickel.
  • the melting point of the slag may be in a range of 1305 ° C to 1490 ° C .
  • the material may be the material containing alumina during the charging of the mixture into a blast furnace.
  • the amount of the alumina contained in the alumina may be in a range of 5wt% to 100wt%.
  • the material may be the material containing alumina during the charging of the mixture into a blast furnace.
  • the grain size of the material containing alumina may be in a range of lmm to 20mm.
  • the fluidity of the slag is improved by using the material containing boron oxide and the material containing alumina in an embodiment of the present invention instead of fluorite, and thereby the molten iron containing nickel can be easily manufactured.
  • the reutilization ratio of the slag can be enhanced since an environmental pollution problem caused by the fluorite does not occur.
  • FIG. 1 is a flow diagram schematically showing a method for manufacturing molten iron containing nickel according to a first embodiment of the present invention.
  • FIG. 2 is a view schematically showing an internal cross-section of a blast furnace manufacturing the molten iron containing nickel according to the first embodiment of the present invention.
  • FIG. 3 is a flow diagram schematically showing a method for manufacturing molten iron containing nickel according to a second embodiment of the present invention.
  • FIG. 4 is a view schematically showing an internal cross-section of a blast furnace manufacturing the molten iron containing nickel according to the second embodiment of the present invention.
  • FIG. 5 is a flow diagram schematically showing a method for manufacturing molten iron containing nickel according to a third embodiment of the present invention.
  • FIG. 6 is a view schematically showing an internal cross-section of a blast furnace manufacturing the molten iron containing nickel according to the third embodiment of the present invention.
  • FIG. 7 is a graph showing melting point of the slag according to an amount of boron oxide, alumina, or fluorite contained in the slag.
  • FIG. 8 is a graph showing melting point of the slag according to Experimental Examples 1 to 13 of the present invention and Comparative Examples 1 to 16.
  • FIG. 9 is a graph showing melting point of the slag according to Experimental Examples 14 to 24 of the present invention and Comparative Examples 1 to 16.
  • FIG. 10 is a graph showing melting point of the slag according to Experimental Examples 5, 6, 20, 23, and 25 of the present invention and Comparative Example 10. BEST MODE
  • FIG. 1 schematically shows a flow diagram showing the method for manufacturing molten iron containing nickel according to the first embodiment of the present invention.
  • the method for manufacturing molten iron containing nickel includes a step of providing sintered nickel ore SlO, a step of charging a mixture containing the sintered nickel ore, coke, the material containing boron oxide, and the material containing alumina into a blast furnace S20, a step of manufacturing slag and molten iron containing nickel by injecting a hot gas into the blast furnace S30, and a step of tapping the slag and the molten iron containing nickel from the blast furnace S40.
  • other steps may be further included if necessary.
  • the method for manufacturing molten iron containing nickel may further include a step of injecting fine boron oxide particles and fine alumina particles into the blast furnace through a side thereof.
  • the sintered nickel ore is manufactured by sintering the nickel oxide ore in the step SlO.
  • the nickel oxide ore is formed by efflorescence of a stone including a large amount of nickel on the surface of the earth and by separation and leaching of a liquid containing nickel under ground.
  • garnierite ore, laterite ore, limonite ore, and saprolite ore can be used as the nickel oxide ore.
  • the sintered nickel ore When the sintered nickel ore is directly charged into the blast furnace, the fuel ratio is increased and then the yield ratio of the molten iron containing nickel may be reduced. Therefore, the sintered nickel ore is manufactured by sintering nickel oxide ore, and thereby it is manufactured into a state to be suitable to be charged into the blast furnace.
  • the nickel oxide ore can be briquetted to be used. That is, the nickel oxide ore is dried to be crushed and can then can be manufactured as a briquette by using a briquetter.
  • the grain size difference of the nickel oxide ore collected from a production site can be large. Therefore, after the nickel oxide ore is classified into a fine nickel oxide ore and a coarse nickel oxide ore, the coarse nickel oxide ore is crushed to be controlled to have a uniform size, and thereby utilization efficiency can be enhanced. For example, based on a 5mm grain size of the nickel oxide ore, if the grain size thereof is not more than 5mm, it is classified as fine nickel oxide ore. In addition, if the grain size thereof is over 5mm, it is classified as coarse nickel oxide ore. Here, the coarse nickel oxide ore is crushed by a crusher, and can thereby be manufactured into the fine nickel oxide ore.
  • coke can be mixed with the nickel oxide ore with a grain size that has been made uniform by classification and re-crushing in order to sinter it.
  • Coke in a form of a powder can be used.
  • a mixture for sintering in which an oxide nickel ore and coke powder are uniformly mixed is manufactured by charging it into a mixer after the nickel oxide ore is mixed with the coke powder.
  • the nickel oxide ore is manufactured by charging the mixture for sintering into a sintering machine and sintering it.
  • the mixture After the mixture is prepared to be charged into the blast furnace in order to manufacture molten iron, it is charged into the blast furnace in the step S20.
  • the mixture includes the sintered nickel ore, the material containing boron oxide, the material containing alumina, and the coke.
  • the coke is uniformly mixed with the nickel oxide ore to be charged into the blast furnace in order to reduce the nickel oxide ore.
  • the material containing boron oxide and the material containing alumina can be manufactured into a premixed material to be mixed together with the sintered nickel ore and the coke.
  • the material containing boron oxide and the material containing alumina are mixed to be briquetted or are pre-melted to be manufactured in the form of a flux.
  • the material containing boron oxide and the material containing alumina can be mixed with the nickel ore and the coke after they are separately supplied.
  • the nickel oxide ore contains a large amount of gangue that is included in the slag during manufacturing of the molten iron. If a large amount of gangue is included in the slag, the slag is not only difficult to discharge since its melting down capacities are deteriorated, but also its fluidity is reduced and then tapping thereof is difficult. Therefore, melting down capacities of the slag in the blast furnace can be improved by charging boron oxide and alumina as fluxes such that the melting point of the slag is lowered and the fluidity thereof can be improved. In addition, the viscosity of the slag can be lowered. Therefore, the tapping process becomes easier. Also, differently from when using fluorite, subsequent processes can smoothly progress and there is no environmental pollution problem. The slag manufactured in the blast furnace can be easily removed by using the boron oxide and the alumina as a replacement material for the fluorite.
  • the material containing boron oxide includes boron oxide in an amount in a range of 5wt% to 100wt%. If the material containing boron oxide includes the boron oxide in an amount of less than 5wt%, the amount of the boron oxide is not sufficient to improve the fluidity of the slag.
  • the boron oxide mainly includes B2O3. B2O3 facilitates the slag in the blast furnace to be melted and dropped well toward a lower portion of the blast furnace. In addition, since the amount of B2O3 that is charged into the blast furnace is almost the same as that of the B2O3 contained in the slag, the melting point of the slag is lowered while the fluidity of the slag is improved.
  • Bauxite ore or ladle slag can be used as a material containing alumina.
  • a flux that has undergone a smelting process can be used as the material containing alumina.
  • the material containing alumina includes the alumina in an amount in a range of 20wt% to 100wt%. If the alumina is present at less than 20wt% the amount is insufficient, and thereby the fluidity of the slag cannot be improved.
  • the material containing alumina mainly includes AI2O3. AI2O3 facilitates the slag in the blast furnace to be melted and dropped well toward a lower portion of the blast furnace.
  • the amount of AI2O3 that is charged into the blast furnace is almost the same as that of the AI2O3 contained in the slag, the melting point of the slag is lowered while the fluidity of the slag is improved.
  • the melting point of the AI2O3 is high and AI2O3 is not reduced easily, the AI2O3 can enter into the slag while maintaining an oxidization state.
  • the weight ratio thereof can be in a range of 20:80 to 80:20. If the weight ratio of the material containing boron oxide and the material containing alumina is out of the above-described range, the fluidity of the slag cannot be improved. Therefore, the material containing boron oxide and the material containing alumina are mixed together within the above range such that the fluidity of the slag is improved.
  • the mixture including the sintered nickel ore, the material containing boron oxide, the material containing alumina, and the coke may include the material containing boron oxide and the material containing alumina of a range of lwt% to 25wt%. If the amount of the material containing boron oxide and the material containing alumina is too small, they do not reach the lower portion of the blast furnace and may be reduced at a midway point. In this case, the slag is not melted and dropped in the blast furnace, and the boron oxide and the alumina are little included in the slag. Therefore, the fluidity of the slag is significantly deteriorated, and thereby the tapping operation can be difficult.
  • the grain size of the mixture in which the material containing boron oxide and the material containing alumina are mixed together may be in a range of 0.2mm to 20mm. If the grain size of the mixture is too small, the boron oxide and the alumina do not maintain an oxidization state in the blast furnace since the surface area of the mixture is too large. As a result, the boron oxide and the alumina can be reduced by reacting with the coke.
  • the boron oxide and the alumina do not enter into the slag, and thereby the fluidity of the slag cannot be improved.
  • the grain size of the mixture is too large, it is difficult for the mixture to enter into the slag.
  • the fluorite is used instead of the boron oxide and the alumina, the atmosphere is polluted since fluorine is contained in an offgas of the blast furnace and the environment is further polluted since the slag contains the fluorine ingredient. Furthermore, it is not easy to process the slag.
  • the molten iron containing nickel and slag is manufactured by injecting hot gas into the blast furnace in the step S30.
  • the coke which is charged into the blast furnace, is combusted by the hot gas while being heated to a high temperature. Therefore, the sintered nickel ore is reduced by a mutual reaction of the coke and the sintered nickel ore, and thereby the slag and the molten iron containing nickel are manufactured.
  • the slag and the molten iron containing nickel are tapped from the blast furnace in the step S40. That is, the slag and the molten iron containing nickel are drawn out through a tap hole of the blast furnace.
  • the fluidity of the slag should be good and the viscosity and melting point thereof should be lowered in order to remove the slag as dregs from the molten iron containing nickel.
  • the fluidity of the slag is improved since a large amount of the boron oxide and the alumina are included in the slag. As the charging amount of the mixture increases, the melting point of the slag is lowered and then the fluidity of the slag is improved. Therefore, the slag can be easily removed from the molten iron containing nickel.
  • an amount of the boron oxide in the slag may be in a range of lwt% to 10wt%. If the amount of the boron oxide is too small, it is difficult to separate the molten iron containing nickel since the fluidity of the slag cannot be sufficiently secured only by increasing alumina. On the contrary, if the amount of the boron oxide is too large, the production cost is increased since a large amount of the boron oxide with a relatively high cost is used and the refractory of the blast furnace is worn out due to the boron.
  • the amount of the alumina in the slag may be in a range of 5wt% to 20wt%. If the amount of the alumina is too small, it is difficult to separate the molten iron containing nickel since the fluidity of the slag cannot be sufficiently secured. On the contrary, if the amount of the alumina is too large, the fluidity of the molten iron is deteriorated and the production cost is increased since a large amount of the aluminum oxide with a relatively high cost is used. In addition, the refractory of the blast furnace is worn out due to aluminum. Therefore, the composition range of the mixture is controlled within the above-described range.
  • the melting point of the slag may be controlled in a range of 1100 °C to 1400 0 C . If the melting point of the slag is too low, although the fluidity of the slag can be sufficiently secured, there is a possibility that an inner portion of the blast furnace can be worn out since a large amount of the boron oxide and the alumina are used. On the contrary, if the melting point of the slag is too high, the fluidity of the slag can be reduced. A process for manufacturing the molten iron containing nickel in the blast furnace will be explained in detail with reference to FIG. 2 below.
  • FIG. 2 schematically shows an internal cross-section of a blast furnace 100 in which the molten iron containing nickel is manufactured.
  • the sintered nickel ore, the material containing boron oxide, the material containing alumina, and the coke are charged through a charging chute 10 located at an upper portion of the blast furnace 100. They are charged as a form of the mixture to form a layer, thereby being uniformly distributed in the blast furnace 100. Therefore, heat exchange between the sintered nickel ore, the material containing boron oxide, the material containing alumina, and the coke is smoothly performed. The coke is charged into the blast furnace to form a coke packed bed 16.
  • a hot gas is injected into the blast furnace 100 through a tuyere 12.
  • the hot gas can be used by being mixed with coke oven gas (COG).
  • COG coke oven gas
  • the hot gas injected into the blast furnace 100 heats the coke packed bed 16 to form a raceway 14 in the blast furnace 100.
  • the coke packed bed 16 is heated to a high temperature to melt the sintered nickel ore, thereby forming the molten iron containing nickel.
  • the molten iron containing nickel flows into a lower portion of the blast furnace 100 and is discharged outside with the slag through a tap hole 18.
  • the boron oxide and the alumna contained in the material containing boron oxide and the material containing alumina, respectively, which are charged into the blast furnace 100 through the charging chute 10, are contained in the slag in the blast furnace 100. Therefore, the boron oxide and the alumna can lower the melting point of the slag. As a result, the slag in the blast furnace 100 can be easily melted and dropped to a lower portion of the blast furnace 100. As a result, the fluidity of the slag is improved, and thereby the molten iron containing nickel can be easily tapped through the tap hole 18.
  • mixed particles containing the boron oxide and the alumina can be directly injected into a slag layer in the blast furnace 100 from a side of the blast furnace 100 through a lance 121 that is inserted into the tuyere 12.
  • the grain size of the boron oxide and the alumina may be in a range of 0.05mm to 0.2mm. If the grain size of the mixed particles is too large, the lance 121 can be blocked. Therefore, the grain size of the mixed particle is controlled within the above range, and thereby the fluidity of the slag can be improved. Since the mixed particles injected through the lance 121 directly enter into the slag, the melting point of the slag is lowered and then fluidity thereof can be improved. Therefore, the tapping process can be easily performed through the tap hole 18.
  • FIG. 3 is a schematic flow diagram showing a method for manufacturing the molten iron containing nickel according to the second embodiment of the present invention.
  • a method for manufacturing the molten iron containing nickel includes: a step of providing sintered nickel ore S12; a step of charging the mixture including the sintered nickel ore, the material containing boron oxide, and the coke into the blast furnace S22; a step of manufacturing the slag and the molten iron containing nickel by injecting the hot gas into the blast furnace S32; and a step of tapping the slag and the molten iron containing nickel S42.
  • other steps may be further included if necessary.
  • the method for manufacturing the molten iron containing nickel may further include a step of injecting boron oxide particles into the blast furnace through the side thereof. Since the steps S12 and S32 of FIG. 3 are the same as the steps SlO and S30 of FIG. 1, respectively, detailed description thereof is omitted for convenience and only the steps S22 and S42 are explained below.
  • the mixture After a mixture is prepared to be charged into the blast furnace in order to manufacture molten iron, it is charged into the blast furnace in the step S22.
  • the mixture includes the sintered nickel ore, the material containing boron oxide, and the coke.
  • the coke is uniformly mixed with the sintered nickel ore to be charged into the blast furnace in order to reduce the sintered nickel ore.
  • the sintered nickel ore includes a large amount of gangue that is included in the slag during manufacturing of the molten iron. If a large amount of gangue is contained in the slag, not only is the slag not tapped well since the melting down capacity of the slag is deteriorated, but also the fluidity of the slag is reduced and then tapping is difficult. Therefore, the above-described material containing boron oxide as the flux is charged into the blast furnace, and thereby the melting down capacity of the slag in the blast furnace is improved and the fluidity of the slag can be improved. In addition, the viscosity of the slag can be lowered. Therefore, the tapping process becomes easier.
  • the material containing boron oxide is used, differently from when using the fluorite, subsequent processes can smoothly progress and there is no environmental problem.
  • the material containing boron oxide is used as a replacement material for the fluorite, and thereby the slag manufactured in the blast furnace can be easily removed.
  • the grain size of the boron oxide may be in a range of 0.05mm to 2mm. If the grain size of the boron oxide is too small, the boron oxide does not maintain an oxidization state in the blast furnace and is then reduced by reacting with the coke since a surface area of the mixture is too large. In this case, since the boron oxide does not enter into the slag, the fluidity of the slag cannot be improved. In addition, if the grain size of the material containing boron oxide is too large, it may be difficult for the boron oxide to enter into the slag. Therefore, the fluidity of the slag cannot be improved.
  • the amount of the material containing boron oxide included in the above described mixture may be in a range of lwt% to 25wt%. If the amount of the material containing boron oxide is too small, it does not reach to a lower portion of the blast furnace and may be reduced at a midway point. In this case, the melting down of the slag is not performed well in the blast furnace and a tapping process is difficult since little boron oxide is contained in the slag. On the contrary, if the amount of the material containing boron oxide is too large, corrosion to the refractory of the blast furnace is aggravated to shorten longevity of the blast furnace.
  • the slag and the molten iron containing nickel are tapped from the blast furnace in the step S42. That is, the slag and the molten iron containing nickel are drawn out through a tap hole of the blast furnace.
  • the fluidity of the slag should be good and the viscosity and melting point thereof should be lowered in order to remove the slag as dregs from the molten iron containing nickel.
  • the material containing boron oxide is used in the second embodiment of the present invention, the fluidity of the slag is improved since a large amount of the boron oxide is included in the slag. As the charging amount of the boron oxide increases, the melting point of the slag is lowered such that the fluidity of the slag is improved. Therefore, the slag can be easily removed from, the molten iron containing nickel.
  • the amount of the boron oxide included in the slag may be in a range of 1.5wt% to 40wt%. If the amount of the boron oxide is too small, it is difficult to separate the molten iron containing nickel since the fluidity of the slag cannot be sufficiently secured. On the contrary, if the amount of the boron oxide is too large, the production cost is increased since a large amount of the boron oxide with a relatively high cost is used and the refractory of the blast furnace is worn out due to the boron. Therefore, the amount of the boron oxide is controlled within the above-described range. A process for manufacturing the molten iron containing nickel in the blast furnace will be explained in detail with reference to FIG. 4 below.
  • FIG. 4 schematically shows an internal cross-section of the blast furnace 100 in which the molten iron containing nickel is manufactured. Since the blast furnace 100 of FIG. 4 is the same as the blast furnace 100 of FIG. 2, like elements are referred to as like reference numerals and detailed description thereof is omitted.
  • the sintered nickel ore, the material containing boron oxide, and the coke are charged through a charging chute 10 located on an upper portion of the blast furnace 100.
  • the sintered nickel ore, the material containing boron oxide, and the coke are sequentially charged to form a layer, thereby being uniformly distributed in the blast furnace 100. Therefore, a heat exchange between sintered nickel ore, the material containing boron oxide and coke is smoothly performed well.
  • the boron oxide contained in the material containing boron oxide which are charged into the blast furnace 100 through the charging chute 10 is contained in the slag in the blast furnace 100. Therefore, since the boron oxide can lower a melting point of the slag, the slag in the blast furnace 100 can be easily melted and dropped to a lower portion of the blast furnace 100. As a result, the fluidity of the slag is improved, and thereby the molten iron containing nickel can be easily tapped through a tap hole 18.
  • boron oxide particles can be directly injected into a slag layer in the blast furnace 100 from a side of the blast furnace 100 through a lance 121 that is inserted into the tuyere 12.
  • the grain size of the boron oxide particles may be in a range of 0.05mm to 0.2mm. If the grain size of the boron oxide particles is too large, the lance 121 can be blocked. Therefore, the grain size of the boron oxide particles is controlled within the above range, and thereby the fluidity of the slag can be improved. Since the boron oxide particles injected through the lance 121 directly enter into the slag, the melting point of the slag is lowered and the fluidity thereof can be improved. Therefore, the tapping process can be easily performed through the tap hole 18.
  • FIG. 5 is a schematic flow diagram showing a method for manufacturing the molten iron containing nickel according to the third embodiment of the present invention.
  • the method for manufacturing the molten iron containing nickel according to the third embodiment of the present invention includes: a step of providing sintered nickel ore S14; a step of charging the mixture including the sintered nickel ore, the material containing alumina, and the coke into the blast furnace S24; a step of manufacturing the slag and the molten iron containing nickel by injecting the hot gas into the blast furnace S34; and a step of tapping the slag and the molten iron containing nickel S44.
  • other steps may be further included if necessary.
  • the method for manufacturing the molten iron containing nickel may further include a step of injecting alumina particles into the blast furnace through the side of the blast furnace. Since the steps S14 and S34 of FIG. 5 are the same as the steps SlO and S30 of FIG. 1, respectively, a detailed description thereof is omitted for convenience and only the steps S24 and S44 are explained below.
  • the mixture includes the sintered nickel ore, the material containing alumina, and the coke.
  • the coke is uniformly mixed with the sintered nickel ore to be charged into the blast furnace in order to reduce the sintered nickel ore.
  • the sintered nickel ore includes a large amount of gangue that is included in the slag during manufacturing of the molten iron. If a large amount of gangue is contained in the slag, not only is the slag not tapped well since the melting down capacity of the slag is deteriorated, but also the fluidity of the slag is reduced and then tapping is difficult.
  • the material containing alumina as the flux is charged into the blast furnace, and thereby the melting down capacity of the slag in the blast furnace is improved and the fluidity of the slag can be improved. In addition, the viscosity of the slag can be lowered. Therefore, the tapping process becomes easier.
  • the material containing alumina is used, differently from using the fluorite, subsequent processes can smoothly progress and there is no environmental problem. The material containing alumina is used as a replacement material for the fluorite, and thereby the slag manufactured in the blast furnace can be easily removed.
  • the grain size of the material containing alumina may be in a range of 0.05mm to 2mm. If the grain size of the material containing alumina is too small, the material containing alumina does not maintain an oxidization state in the blast furnace and is then reduced by reacting with the coke since a surface area thereof is too large. In this case, since the alumina does not enter into the slag, the fluidity of the slag cannot be improved. In addition, if the grain size of the material containing alumina is too large, it may be difficult for the alumina to enter into the slag. Therefore, the fluidity of the slag cannot be improved.
  • the amount of the material containing alumina included in the above-described mixture may be in a range of lwt% to 25wt%. If the amount of the material containing alumina is too small, it does not reach a lower portion of the blast furnace and may be reduced at a midway point. In this case, the melting down of the slag is not performed well in the blast furnace and the tapping process is difficult since little alumina is contained in the slag. On the contrary, if the amount of the material containing alumina is too large, corrosion to the refractory of the blast furnace is aggravated to shorten longevity of the blast furnace.
  • the slag and the molten iron containing nickel are tapped from the blast furnace in the step S44. That is, the slag and the molten iron containing nickel are drawn out through a tap hole of the blast furnace.
  • the fluidity of the slag should be good and viscosity and melting point thereof should be lowered in order to remove the slag as dregs from the molten iron containing nickel.
  • the material containing alumina since the material containing alumina is used in the third embodiment of the present invention, the fluidity of the slag is improved since a large amount of the alumina is included in the slag. As the charging amount of the material containing alumina increases, the melting point of the slag is lowered and the fluidity of the slag is improved. Therefore, the slag can be easily removed from the molten iron containing nickel.
  • the amount of the alumina included in the slag may be in a range of 2wt% to 40wt%. If the amount of the alumina is too small, it is difficult to separate the molten iron containing nickel since the fluidity of the slag cannot be sufficiently secured. On the contrary, if the amount of the alumina is too large, the production cost is increased since a large amount of the alumina with a relatively high cost is used, and the refractory of the blast furnace is worn out due to the aluminum. Therefore, the amount of the alumina is controlled within the above-described range. A process for manufacturing the molten iron containing nickel in the blast furnace will be explained in detail with reference to FIG. 6 below.
  • FIG. 6 schematically shows an internal cross-section of the blast furnace 100 in which the molten iron containing nickel is manufactured. Since the blast furnace 100 of FIG. 6 is the same as the blast furnace 100 of FIG. 2, like elements are referred to by like reference numerals and a detailed description thereof is omitted.
  • the sintered nickel ore, the material containing alumina, and the coke are charged through a charging chute 10 located at an upper portion of the blast furnace 100.
  • the sintered nickel ore, the material containing alumina, and the coke are sequentially charged to form a layer, thereby being uniformly distributed in the blast furnace 100. Therefore, heat exchange between the sintered nickel ore, the material containing alumina, and the coke are smoothly performed.
  • the alumina can lower the melting point of the slag, the slag in the blast furnace 100 can be easily melted and dropped to a lower portion of the blast furnace 100. As a result, the fluidity of the slag is improved, and thereby the molten iron containing nickel can be easily tapped through a tap hole 18.
  • the alumina particles can be directly injected into a slag layer in the blast furnace 100 from a side of the blast furnace 100 through a lance 121 that is inserted into the tuyere 12.
  • the grain size of the alumina particles may be in a range of 0.05mm to 0.2mm. If the grain size of the alumina particles is too large, the lance 121 can be blocked. Therefore, the grain size of the alumina particles is controlled within the above described range, and thereby the fluidity of the slag can be improved. Since the alumina particles injected through the lance 121 directly enter into the slag, the melting point of the slag is lowered and the fluidity thereof can be improved.
  • FIG. 7 is a graph showing a melting point of the slag according to amounts of the boron oxide, alumina, or fluorite contained in the slag.
  • the dotted line represents melting point of the slag according to an amount of the boron oxide (B2O3) contained in the slag
  • the dashed line represents melting point of the slag according to an amount of the alumina (AI2O3) contained in the slag.
  • the solid line which is drawn for comparison, represents melting point of the slag according to an amount of the fluorite (CaF 2 ) contained in the slag.
  • the melting point of the slag is reduced. Therefore, the fluidity of the slag during tapping can be improved by controlling the amount of the boron oxide or the alumina. Further, as shown in FIG. 7, as the amount of the alumina in the slag increases, the melting point of the slag is reduced. However, the melting point of the slag is increased again if the amount of the alumina is over about 16wt%. The melting point of the slag is reduced by the boron oxide and the fluorite, which have similar patterns.
  • the fluorite is used instead of the fluorite, the fluidity of the slag can be reduced in almost the same pattern as the case in which the fluorite is charged. Therefore, the molten iron containing nickel can be easily tapped.
  • the fluorite is generally used, since the amount of the fluorite in the slag is about 5wt%, a better effect can be obtained than when the fluorite is used if the amount of the boron oxide in the slag is 5wt% or the amount of the alumina is in a range of 10wt% to 15wt%.
  • the fluorite is contained in the slag, the slag cannot be reused due to an environmental pollution problem.
  • the boron oxide and the alumina have no environmental pollution problem, the slag can be reused. Therefore, the fluorite can be replaced by the boron oxide or the alumina.
  • the melting point change of the slag according to the amount of boron oxide or alumina of FIG. 7 will be explained in detail below.
  • the present invention will be explained in detail below by using experimental examples. The experimental examples are merely to illustrate the present invention and the present invention is not limited thereto.
  • the slag and molten iron containing nickel were manufactured by charging the sintered nickel ore, the material containing boron oxide, and the coke, and injecting the hot gas into the blast furnace. 300 tonnes of the sintered nickel ore and 100 tonnes of coke were charged into the blast furnace as fixed amounts, and 40kg of the material containing boron oxide was charged therein. In addition, the molten iron containing nickel was manufactured by injecting the hot gas into the blast furnace. Since the remaining experimental conditions can be easily understood by those skilled in the art in a technical field that belongs to the present invention, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 190kg of the material containing boron oxide. Since the remaining experimental conditions were the same as those of the Experimental Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 390kg of the material containing boron oxide. Since the remaining experimental conditions were the same as those of the Experimental Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 740kg of the material containing boron oxide. Since the remaining experimental conditions were the same as those of the Experimental Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 1.94 tonnes of the material containing boron oxide. Since the remaining experimental conditions were the same as those of the Experimental Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 4.01 tonnes of the material containing boron oxide. Since the remaining experimental conditions were the same as those of the Experimental Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 5.86 tonnes of the material containing boron oxide. Since the remaining experimental conditions were the same as those of the Experimental Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 8.13 tonnes of the material containing boron oxide. Since the remaining experimental conditions were the same as those of the Experimental Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 0.38 tonnes of the material containing boron oxide. Since the remaining experimental conditions were the same as those of the Experimental Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 12.61 tonnes of the material containing boron oxide. Since the remaining experimental conditions were the same as those of the Experimental Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 14.74 tonnes of the material containing boron oxide. Since the remaining experimental conditions were the same as those of the Experimental Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 18.89 tonnes of the material containing boron oxide. Since the remaining experimental conditions were the same as those of the Experimental Example 1, a detailed description thereof is omitted.
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 34.3 tonnes of slag was obtained, and the amount of boron oxide in the slag was 34.3kg. The melting point of the slag was 1440 ° C .
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 34.5 tonnes of slag was obtained, and the amount of boron oxide in the slag was 172.5kg. The melting point of the slag was 1430 °C .
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 35.2 tonnes of slag was obtained, and the amount of boron oxide in the slag was 352kg. The melting point of the slag was 1440 ° C .
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 35.3 tonnes of slag was obtained, and the amount of boron oxide in the slag was 706kg. The melting point of the slag was 1360 ° C .
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 36.4 tonnes of slag was obtained, and the amount of boron oxide in the slag was 1.82 tonnes. The melting point of the slag was 1280 ° C .
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 36.9 tonnes of slag was obtained, and the amount of boron oxide in the slag was 3.69 tonnes. The melting point of the slag was 1180 ° C .
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 37.1 tonnes of slag was obtained, and the amount of boron oxide in the slag was 5.565 tonnes. The melting point of the slag was 1150 ° C .
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 38.2 tonnes of slag was obtained, and the amount of boron oxide in the slag was 7.64 tonnes. The melting point of the slag was 1148 ° C .
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 38.6 tonnes of slag was obtained, and the amount of boron oxide in the slag was 9.65 tonnes. The melting point of the slag was 1137 "C .
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 39.1 tonnes of slag was obtained, and the amount of boron oxide in the slag was 11.73 tonnes. The melting point of the slag was 1125 °C .
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 39.6 tonnes of slag was obtained, and the amount of boron oxide in the slag was 13.86 tonnes. The melting point of the slag was 1113 ° C .
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 40.1 tonnes of slag was obtained, and the amount of boron oxide in the slag was 16.04 tonnes. The melting point of the slag was 1100 ° C .
  • the amount of slag, the amount of boron oxide in the slag, and the melting point of the slag were measured. 40.3 tonnes of slag was obtained, and the amount of boron oxide in the slag was 18.135 tonnes. The melting point of the slag was 1100 ° C .
  • the yield ratio of boron oxide in the slag that is, the amount of boron oxide contained in the slag among the charged material containing boron oxide, was continuously maintained in a range of 90% to 95%.
  • the yield ratio of the boron oxide was reduced to 80% and 85%, respectively.
  • the melting point of the slag was gradually lowered. That is, although the melting point of the slag was 1440 ° C in Experimental Example 1, the melting point of the slag was lowered to 110 °C in Experimental Example 13. Therefore, the melting point of the slag was gradually reduced as more material containing boron oxide was charged.
  • the slag and molten iron containing nickel were manufactured by charging the sintered nickel ore, the material containing alumina, and the coke, and injecting the hot gas into the blast furnace. 300 tonnes of sintered nickel ore and 100 tonnes of coke were charged into the blast furnace as fixed amounts, and 17kg of the material containing alumina was charged therein.
  • the molten iron containing nickel was manufactured by injecting the hot gas into the blast furnace. Since the remaining experimental conditions can be easily understood by those skilled in the art in a technical field belonging to the present invention, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 710kg of the material containing alumina. Since the remaining experimental conditions were the same as those of Experimental Example 14, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging
  • the molten iron containing nickel was manufactured by charging 2.19 tonnes of the material containing alumina. Since the remaining experimental conditions were the same as those of Experimental Example 14, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 2.95 tonnes of the material containing alumina. Since the remaining experimental conditions were the same as those of Experimental Example 14, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging
  • the molten iron containing nickel was manufactured by charging 4.14 tonnes of the material containing alumina. Since the remaining experimental conditions were the same as those of Experimental Example 14, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 4.92 tonnes of the material containing alumina. Since the remaining experimental conditions were the same as those of Experimental Example 14, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging
  • the molten iron containing nickel was manufactured by charging
  • Experimental Results of Experimental Examples 14 to 24 Experimental Results of Experimental Example 14
  • the amount of slag, the amount of alumina in the slag, and the melting point of the slag were measured. 31.2 tonnes of slag was obtained, and the amount of alumina in the slag was 15.6kg. The melting point of the slag was 1490 ° C .
  • the yield ratio of the alumina in the slag that is, the amount of alumina contained in the slag among the charged material containing alumina, was continuously maintained in a range of 90% to 98%.
  • both of the yield ratios of the alumina were reduced to 90%.
  • the melting point of the slag was gradually lowered. That is, the melting point of the slag was 1490 ° C in Experimental Example 14 while the melting point of the slag was lowered to 1305 ° C in Experimental Example 23. However, the melting point of the slag was raised to 1323 ° C in Experimental Example 24. Therefore, the melting point of the slag was gradually reduced as more material containing alumina was charged until the amount of alumina contained in the slag become 16wt%.
  • the slag and molten iron containing nickel were manufactured by charging the sintered nickel ore, the material containing boron oxide, the material containing alumina, and the coke, and injecting the hot gas into the blast furnace. 300 tonnes of sintered nickel ore and 100 tonnes of coke were charged into the blast furnace as fixed amounts, and 1.94 tonnes of the material containing boron oxide and 3.75 tonnes of the material containing alumina were charged therein. Then, the molten iron containing nickel was manufactured by injecting the hot gas into the blast furnace. Also, the melting point of the slag and amounts of the boron oxide and alumina contained in the slag were measured, respectively. Since the remaining experimental conditions can be easily understood by those skilled in the art in a technical field belonging to the present invention, a detailed description thereof is omitted.
  • the amount of slag, the amounts of boron oxide and alumina in the slag, and the melting point of the slag were measured. 38.9 tonnes of slag was obtained, and amounts of the boron oxide and the alumina in the slag were 5wt% and 10wt%, respectively.
  • the melting point of the slag was about 1180 ° C .
  • the melting point of the slag was significantly lowered by using the material containing boron oxide and the material containing alumina together. Therefore, fluidity of the slag was improved, and thereby molten iron containing nickel could be easily tapped.
  • the slag and molten iron containing nickel were manufactured by charging the sintered nickel ore, the fluorite, and the coke, and injecting the hot gas into the blast furnace for comparison with the above-described Experimental Examples 1 to 25. 300 tonnes of sintered nickel ore and 100 tonnes of coke were charged into the blast furnace as fixed amounts, and 42.8kg of fluorite was charged therein. Then, the molten iron containing nickel was manufactured by injecting the hot gas into the blast furnace. Since the remaining experimental conditions can be easily understood by those skilled in the art in a technical field belonging to the present invention, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 84.5kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 127.9kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 164.1kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 193.6kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 240kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 260.4kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 289.2kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 321.8kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 353.7kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 393.1kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 424.4kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 475.1kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 506.3kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 545.1kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • the molten iron containing nickel was manufactured by charging 574kg of fluorite. Since the remaining experimental conditions were the same as those of Comparative Example 1, a detailed description thereof is omitted.
  • Comparative Examples 1 to 16 A ratio of the amount of fluorite in the slag to the amount of charged fluorite was obtained in Comparative Examples 1 to 16. That is, the yield ratio of the fluorite was obtained.
  • Table 3 describes arranged experimental conditions of Comparative Examples 1 to 16 and respective experimental results thereof. Table 3
  • the yield ratio of the fluorite was in a range of 41% to 57%, which is relatively less than that of the boron oxide or the alumina. That is, the amount of fluorite contained in the slag was relatively less than that charged into the blast furnace. Therefore, it can be expected that the remaining fluorite was contained in the molten iron containing nickel or was vaporized.
  • fluoric acid is formed in a plate that is manufactured by the molten iron containing nickel by the fluorine additionally contained therein when the plate is cooled by water in a following process. The fluoric acid can erode subsidiary devices and a dust collector. In addition, it can cause environmental pollution.
  • FIG. 8 is a graph showing a change of a melting point of the slag according to an amount of the boron oxide or the fluorite contained in the slag.
  • the above described Experimental Examples 1 to 13 correspond to a case that the boron oxide is added while the above described Comparative Examples 1 to 16 correspond to a case that the fluorite is added in FIG 8.
  • FIG. 8 when a material containing boron oxide or fluorite is used, it can be understood that the melting point of the slag is similarly reduced as the content of the material containing boron oxide or fluorite in the slag increases.
  • the fluidity of the slag can be lowered to almost the same level if slightly more boron oxide is used instead of the fluorite, it is easy to tap the molten iron containing nickel. Furthermore, since the fluorite is contained in the slag, it is impossible to reuse the slag that is capable of causing an environmental pollution problem. However, since the boron oxide has no environmental pollution problem, the slag can be reused. Therefore, the fluorite can be replaced by the material containing boron oxide.
  • FIG. 9 is a graph showing a change of melting point of the slag according to amount of alumina or fluorite in the slag.
  • the above-described Experimental Examples 14 to 24 correspond to a case in which the material containing alumina is added while the above-described Comparative Examples 1 to 16 correspond to a case in which the fluorite is added, in FIG 9.
  • the melting point of the slag is similarly lowered as amounts of the alumina or the fluorite in the slag increase. That is, since the fluidity of the slag can be lowered to almost the same level if a little more alumina is used instead of the fluorite, it is easy to tap the molten iron containing nickel. Furthermore, since the fluorite is contained in the slag, it is impossible to reuse the slag that is capable of causing an environmental pollution problem. However, since the alumina has no environmental pollution problem, the slag can be reused. Therefore, the fluorite can be replaced by the material containing alumina.
  • FIG. 10 is a graph showing melting point of the slag according to Experimental Examples 5, 6, 20, 23, and 25 and Comparative Example 10.
  • the melting points of the slag are comparatively shown when the material containing boron oxide, the material containing alumina, the mixture of the material containing boron oxide and the material containing alumina, and the iluorite are used, in FIG. 10.
  • the melting point of the slag can be significantly lowered if the material containing boron oxide and the material containing alumina are mixed to be charged into the blast furnace, compared to a case in which only the material containing alumina is used or the fluorite is used.
  • the amount of the material containing boron oxide is less than that when only the material containing boron oxide used, the manufacturing cost can be significantly reduced. Therefore, molten iron containing nickel can be manufactured with a low cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Manufacture Of Iron (AREA)

Abstract

La présente invention concerne un procédé de fabrication de fonte liquide contenant du nickel. Ce procédé consiste : i) à utiliser du minerai de nickel fritté par frittage d'oxyde de nickel; ii) à charger un mélange contenant le minerai de nickel fritté, du coke, et au moins un matériau sélectionné dans le groupe comprenant oxyde de bore et un matériau contenant de l'alumine dans un haut fourneau; iii) à fabriquer du laitier et de la fonte liquide contenant du nickel par injection de gaz chaud dans le haut fourneau; et iv) à piquer le laitier et la fonte liquide contenant du nickel dans le haut fourneau.
PCT/KR2008/002627 2007-05-11 2008-05-09 Procédé de fabrication de fonte liquide contenant du nickel Ceased WO2008140226A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200880015301.4A CN101680042B (zh) 2007-05-11 2008-05-09 制造含镍熔铁的方法
JP2010507334A JP5194111B2 (ja) 2007-05-11 2008-05-09 ニッケル含有溶鉄の製造方法

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR1020070046244A KR101322898B1 (ko) 2007-05-11 2007-05-11 니켈 함유 용철의 제조 방법
KR10-2007-0046244 2007-05-11
KR10-2007-0046243 2007-05-11
KR1020070046243A KR101322897B1 (ko) 2007-05-11 2007-05-11 니켈 함유 용철의 제조 방법
KR1020070073694A KR100948926B1 (ko) 2007-07-23 2007-07-23 니켈 함유 용철의 제조 방법
KR10-2007-0073694 2007-07-23

Publications (1)

Publication Number Publication Date
WO2008140226A1 true WO2008140226A1 (fr) 2008-11-20

Family

ID=40002379

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2008/002627 Ceased WO2008140226A1 (fr) 2007-05-11 2008-05-09 Procédé de fabrication de fonte liquide contenant du nickel

Country Status (3)

Country Link
JP (1) JP5194111B2 (fr)
CN (1) CN101680042B (fr)
WO (1) WO2008140226A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5991290B2 (ja) * 2013-09-13 2016-09-14 Ｊｆｅスチール株式会社 焼結鉱の製造方法
CN109369221B (zh) * 2018-11-15 2021-04-27 北京璞域环保科技有限公司 一种利用旋转窑煅烧蛇纹石生产中量元素肥料的方法
CN110106348B (zh) * 2019-05-21 2021-04-20 中南大学 一种强化红土镍矿烧结的复合添加剂及其使用方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997017473A1 (fr) * 1995-11-03 1997-05-15 Technological Resources Pty. Ltd. Procedure duplex de production de metaux et d'alliages de metaux a partir de minerais de metaux oxydiques
JP2001303113A (ja) * 2000-04-26 2001-10-31 Mitsui Matsushima Co Ltd 燃焼灰成分においてＣａＯ成分とＦｅ２Ｏ３成分とが多い石炭の利用方法
WO2006045254A1 (fr) * 2005-09-16 2006-05-04 Shenjie Liu Procédé de fabrication de ferronickel par fusion de minerai d’oxyde de nickel contenant des cristaux d'eau dans un haut-fourneau
WO2006050658A1 (fr) * 2005-09-16 2006-05-18 Shenjie Liu Procede de preparation de ferronickel par fusion en haut fourneau de minerai d’oxyde de nickel depourvu d’eau cristalline

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6199607A (ja) * 1984-10-19 1986-05-17 Nippon Kokan Kk <Nkk> 高炉操業方法
CA1244656A (fr) * 1984-12-03 1988-11-15 Wei-Kao Lu Methode et dispositif de reduction de minerais
JP2945053B2 (ja) * 1990-03-05 1999-09-06 日新製鋼株式会社 酸化ニッケル鉱石の処理方法
JP4669189B2 (ja) * 2001-06-18 2011-04-13 株式会社神戸製鋼所 粒状金属鉄の製法
CN1257295C (zh) * 2004-11-15 2006-05-24 四川川投峨眉铁合金（集团）有限责任公司 一种火法提取镍的生产方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997017473A1 (fr) * 1995-11-03 1997-05-15 Technological Resources Pty. Ltd. Procedure duplex de production de metaux et d'alliages de metaux a partir de minerais de metaux oxydiques
JP2001303113A (ja) * 2000-04-26 2001-10-31 Mitsui Matsushima Co Ltd 燃焼灰成分においてＣａＯ成分とＦｅ２Ｏ３成分とが多い石炭の利用方法
WO2006045254A1 (fr) * 2005-09-16 2006-05-04 Shenjie Liu Procédé de fabrication de ferronickel par fusion de minerai d’oxyde de nickel contenant des cristaux d'eau dans un haut-fourneau
WO2006050658A1 (fr) * 2005-09-16 2006-05-18 Shenjie Liu Procede de preparation de ferronickel par fusion en haut fourneau de minerai d’oxyde de nickel depourvu d’eau cristalline

Also Published As

Publication number Publication date
JP5194111B2 (ja) 2013-05-08
CN101680042A (zh) 2010-03-24
CN101680042B (zh) 2013-02-20
JP2010526936A (ja) 2010-08-05

Similar Documents

Publication Publication Date Title
CN102758085B (zh) 用红土镍矿低温冶炼生产镍铁合金的方法
CN100532579C (zh) 使用含镍、铬的低品位褐铁矿冶炼低磷不锈钢基料的方法
CN101538629A (zh) 用粉铬矿冶炼铬铁合金及含铬铁水工艺及设备
CN101481753A (zh) 一种从红土氧化镍矿冶炼镍铁合金的方法
KR102830692B1 (ko) Dri 제품으로 액상 선철의 제조 방법
CN101215614A (zh) 还原室和加热室多层密闭间隔和熔融气化联合金属冶炼法
CN107699701A (zh) 由含锌与铁的混合熔渣回收有价组分的方法
CN106119447A (zh) 一种含稀土与铌混合熔渣熔融还原生产和调质处理的方法
CN105063266B (zh) 一种转炉炼钢方法
CN110295261A (zh) 一种高锰炼钢铁水的冶炼方法
CN101967530B (zh) 一种电冶熔融还原铁的方法
JP5428534B2 (ja) 高亜鉛含有鉄鉱石を用いた銑鉄製造方法
WO2008140226A1 (fr) Procédé de fabrication de fonte liquide contenant du nickel
CN101660064B (zh) 镍铁合金制备工艺
CN106755659A (zh) 一种含稀土混合熔渣冶金熔融还原回收的方法
CN111041139A (zh) 一种高炉开炉的布料方法
JP3815234B2 (ja) 高炉への微粉炭多量吹込み操業方法
KR101322898B1 (ko) 니켈 함유 용철의 제조 방법
CN102206725A (zh) 二步法生产还原铁粉的工艺
KR100948926B1 (ko) 니켈 함유 용철의 제조 방법
CN101871029B (zh) 一种炼铁方法
CN101386410B (zh) 一种软化金属硅冶炼炉炉渣的方法
KR101322897B1 (ko) 니켈 함유 용철의 제조 방법
WO2022021466A1 (fr) Procédé de traitement d&#39;un minerai à surface de minerai latérite-nickel à l&#39;aide d&#39;un procédé de réduction en trois étapes
US20170130284A1 (en) Products and processes for producing steel alloys using an electric arc furnace

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200880015301.4

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08753423

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2010507334

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08753423

Country of ref document: EP

Kind code of ref document: A1