[go: up one dir, main page]

WO2018194397A4 - Procédé de fusion d'ilménite à l'aide de boue rouge - Google Patents

Procédé de fusion d'ilménite à l'aide de boue rouge Download PDF

Info

Publication number
WO2018194397A4
WO2018194397A4 PCT/KR2018/004563 KR2018004563W WO2018194397A4 WO 2018194397 A4 WO2018194397 A4 WO 2018194397A4 KR 2018004563 W KR2018004563 W KR 2018004563W WO 2018194397 A4 WO2018194397 A4 WO 2018194397A4
Authority
WO
WIPO (PCT)
Prior art keywords
titanium dioxide
mixture
iron
red mud
leaching
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/KR2018/004563
Other languages
English (en)
Korean (ko)
Other versions
WO2018194397A1 (fr
Inventor
박현식
김민석
전호석
김영재
정경우
하민철
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.)
Korea Institute of Geoscience and Mineral Resources KIGAM
Original Assignee
Korea Institute of Geoscience and Mineral Resources KIGAM
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 KR1020170050662A external-priority patent/KR101790128B1/ko
Priority claimed from KR1020180041532A external-priority patent/KR101900672B1/ko
Application filed by Korea Institute of Geoscience and Mineral Resources KIGAM filed Critical Korea Institute of Geoscience and Mineral Resources KIGAM
Priority to AU2018256247A priority Critical patent/AU2018256247B2/en
Publication of WO2018194397A1 publication Critical patent/WO2018194397A1/fr
Publication of WO2018194397A4 publication Critical patent/WO2018194397A4/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • C01G23/04—Oxides; Hydroxides
    • C01G23/047—Titanium dioxide

Definitions

  • the present invention relates to a method for smelting a luminous source of titanium, and more particularly, to a smelting method for ilmenite capable of obtaining high-quality titanium dioxide and recovering process by-products.
  • the titanium raw material industry which produces titanium, is predominantly made up of iron ore deposits in Australia, South Africa, and India, or titanium oxide produced in Canada and Norway. Australia is the world's largest producer of heavy mineral concentrates and more than half of the titaniferous stones are produced as artificial rutile and used as pigments.
  • Titanium oxide can be used directly for the production of titanium dioxide pigments, but mostly titanium oxide improves the dignity by producing titanium dioxide slag or artificial rutile.
  • rutile Another important raw material is natural rutile, which is produced as a by-product of titanium oxide in Australia, the United States and South Africa, and a major mineral in Sierra Leone.
  • Titanium oxide (FeO ⁇ TiO 2 ) generally has a TiO 2 content of 45 to 65% by weight. With the development of chemical and dry smelting technology, the iron content can be removed to improve the TiO 2 content in artificial rutile by 90 ⁇ 96%.
  • iron oxide is coated with iron as a fuel and as a reducing agent at a high temperature of 1,300 ° C.
  • the reaction proceeds according to Scheme 1 below.
  • the iron is aeration by blowing air in ammonium chloride solution at temperatures up to 80 ° C.
  • a hydrocyclone is used to separate the artificial rutile (TiO 2 , 90%) of the reference grade from the hydrous iron pumped to the detention pond.
  • the general reaction is performed according to the following reaction formula 2.
  • the reduced iron produced in the reduction process can not be separated in advance, and the purity of titanium dioxide is increased through an aeration and acid leaching process thereafter, thereby greatly increasing the load of the aeration and acid leaching processes.
  • red mud is a wastewater generated during the bauxite refining process, which has a water content of 40 ⁇ 55% and a pH of 11 ⁇ 13.
  • the present invention relates to a smelting method of ilmenite utilizing red mud, and it is possible to recover high purity titanium dioxide by smelting a sun-mine by using red mud as a flux or raw material, which is conventionally difficult to use , And provides a method of smelting the sun metal using the red mud which is difficult to treat as waste.
  • the efficiency of the process can be greatly increased by increasing the quality of titanium dioxide recovered in the smelting process and at the same time the alumina (Al 2 O 3 ) contained in the red mud added as a flux can be separated to newly provide a method of utilizing the red mud .
  • the present invention provides a method for producing a mixture comprising the steps of mixing an ilmenite concentrate and a red mud to form a mixture, adding a carbon source to the mixture and heating to reduce iron in the mixture, Separating the reduced iron through selection, aeration and acid-leaching the residue, removing iron in the residue, and recovering the titanium dioxide.
  • a method for producing a mixture comprising the steps of mixing an ilmenite concentrate and a red mud to form a mixture, adding a carbon source to the mixture and heating to reduce iron in the mixture, Separating the reduced iron through selection, aeration and acid-leaching the residue, removing iron in the residue, and recovering the titanium dioxide.
  • the present invention also provides a process for preparing a mixture comprising: (a) mixing an ilmenite concentrate with a red mud to form a mixture; (b) adding a carbon source to the mixture and heating to reduce the iron in the mixture to form a molten droplet; (c) physically separating the molten droplet to remove iron and recover the titanium dioxide slag; (d) introducing the titanium dioxide slag into a Bayer process to recover alumina (Al 2 O 3 ); And (e) acid-leaching the titanium dioxide slag from which alumina has been separated to remove silica (SiO 2 ).
  • the red mud generated in the aluminum oxide smelting process which is very difficult to treat, can be treated together with the smelting process of the ylmenite as a flux or raw material.
  • titanium dioxide slag it is possible to greatly increase the quality of the remaining titanium dioxide slag by physically selecting and separating it by forming a molten droplet by reducing it together with red stones instead of reducing and removing iron, which is an impurity contained in the ilmenite, at a high temperature .
  • the aeration step for recovering high-quality titanium dioxide by minimizing the content of iron in the recovered titanium dioxide slag by recovering and recovering reduced iron through a reduction process for controlling the heating temperature by adding a carbon source So that the cost of the smelting process of the ylmenite can be drastically reduced.
  • FIG. 1 is a process flow chart of a method for smelting smith using a red mud in accordance with an embodiment of the present invention.
  • FIG. 2 is a process flow diagram of a method for smelting smith using a red mud in accordance with another embodiment of the present invention.
  • FIG. 3 is a photograph of ilmenite, red mud, and bituminous coal samples, which are starting materials, in the smelt smelting method using red mud, according to an embodiment of the present invention.
  • FIG. 4 is a photograph of a reduced iron heated and melted by heating in a smelting method using red mats according to an embodiment of the present invention.
  • FIG. 5 is a schematic view showing a configuration of a smithering smelting method using red mud in accordance with another embodiment of the present invention.
  • FIG. 6 is a photograph of the high-temperature high-pressure leaching apparatus.
  • FIG. 7 is a graph showing alumina and silica contents according to caustic soda concentration in a Bayer process step in a smelting method using ilmenite according to another embodiment of the present invention.
  • FIG. 5 is a schematic view showing a configuration of a smithering smelting method using red mud in accordance with another embodiment of the present invention.
  • a mixture obtained by mixing 100 g of a lumineter and 100 g of red mignon was pressurized to prepare a single-phase light.
  • the powder was mixed uniformly with a ball mill through the ball mill, and the mixture was blended using a pelletizer with a maximum pressure of 5 tons.
  • Bituminous coal was added to the single light and reduced by heating in a rotary furnace at 1700 ⁇ for 15 minutes.
  • the molten droplet was separated using a magnetic separator.
  • the molten droplets were removed to recover the titanium dioxide slag.
  • FIG. 6 is a photograph of the high-temperature high-pressure leaching apparatus.
  • caustic soda was charged into the high-temperature and high-pressure leaching apparatus together with the titanium dioxide slag from which the molten droplets were removed, and leached at 200 ° C. and 20 bar for 1 hour.
  • the components leached after leaching were analyzed to determine the content of alumina and silica in the titanium dioxide slag.
  • the titanium dioxide slag from which alumina was removed was acid leached by adding sulfuric acid at a concentration of 30%.
  • FIG. 1 is a process flow chart of a method for smelting smith using a red mud in accordance with an embodiment of the present invention.
  • a method of smelting smelting with ilmenite includes a step (S100) of mixing an ilmenite concentrate and a red mud to form a mixture, A step S300 of separating the reduced iron by magnetic force sorting and aeration and acid leaching of the residues by adding a carbon source and heating to reduce iron in the mixture S200, And removing iron from the residue to recover titanium dioxide (S400).
  • the ilmenite concentrate may be one obtained by increasing the purity by illuminating the aluminate ores.
  • the sumenite may contain 17 to 50 wt% of titanium dioxide (TiO 2 ).
  • the quality of the lumenite concentrate is generally 45% to 50%, but the higher the quality of titanium, the higher the process cost.
  • the ilmenite concentrate may contain 35 to 65% by weight of titanium dioxide and the remaining iron oxide (FeO x ).
  • the acid iron can be separated and recovered in the magnetic force selecting step.
  • the red mud may be waste generated in the aluminum oxide smelting process.
  • the pH of the red mud is very high, so it is difficult to dispose of the red mud, but when it is mixed with the luminol concentrate, iron and titanium dioxide contained in red mud can be separated and recovered.
  • the red mud may contain 5 to 10% by weight of titanium dioxide (TiO 2 ).
  • the titanium dioxide contained in the red mud can be recovered together with the titanium dioxide contained in the ylmnate concentrate.
  • the red mud may contain, in addition to titanium dioxide, 30 to 40% by weight of residual iron oxide (Fe 2 O 3 ).
  • the iron oxide contained in the red mud may be hematite.
  • the red mud hematite may be reduced together with the iron oxide component of the ylmnate concentrate to be physically separated.
  • Red mullite may be added in an amount of 10 to 200 parts by weight based on 100 parts by weight of the total sumuminate concentrate.
  • the red iron oxide contained in the red mud is first produced as reduced iron because it has a very fast reduction rate as compared with ilmenite.
  • the resulting reduced iron is carburized by carbon, has a low melting point and acts as a strong reducing agent itself, thereby facilitating the reduction of the ylmenite and greatly increasing the generation of reduced iron droplets, which will be described later.
  • the amount of the red mud is less than 10 parts by weight, the purity of the recovered titanium dioxide is lowered.
  • the amount of the red mud is more than 200 parts by weight, the efficiency of the iron reduction process may be reduced.
  • the mixture may be pressurized to form a pellet.
  • the efficiency of the step of heating and reducing afterward can be greatly increased, and the convenience of the operation in the reduction process using the rotary furnace or the sintering furnace can be greatly increased.
  • the carbon source may be any one selected from bituminous coal consisting of peat, lignite and bituminous coal.
  • the carbon source can increase the reaction temperature in the step of heating and reducing the mixture, and the carbon reduced reduced iron itself can be a very strong reducing agent, thereby greatly increasing the efficiency of the reduction step.
  • the carbon source may be added in an amount of 10 to 100 parts by weight based on 100 parts by weight of the mixture.
  • the carbon source when the carbon source is set to the maximum within the above range, the maximum reduction ratio can be expected, and unreacted residual carbon can be recovered and reused.
  • the carbon source may be added to the mixture and the iron in the mixture may be reduced by heating at 1350 to 1500 ⁇ ⁇ for 8 hours to 12 hours.
  • the mixture of the ismetallate concentrate and the red mud does not reach the melting temperature and does not melt.
  • heating is performed in the above range, sufficient reduction roasting proceeds, and alumina, silica Can be controlled and the reduced iron component can be physically separated.
  • the heating may be performed in a sintering furnace or a rotary furnace.
  • a carbon source can be added to easily raise the temperature to a set temperature, and the reaction temperature and the reaction time can be controlled while the reduction reaction proceeds It is very advantageous.
  • the reduced iron may be formed in the form of a droplet.
  • the iron oxide contained in the ilmenite concentrate and the iron oxide contained in the red mud are reduced to be discharged as oxides, and then discharged in the form of molten pigments.
  • the reduced iron may be separated through magnetic force selection (S300).
  • the iron component When the reduced iron is formed in the form of a molten droplet, the iron component aggregates and can easily be attracted to the magnetism.
  • the magnetite concentrate and the iron component in the red mud can be separated together in one step by magnetic force sorting.
  • the iron is separated and removed, and the content of titanium dioxide derived from the ilmenite concentrate and red mud is increased, so that the quality of the recovered titanium dioxide can be greatly increased.
  • the residue is a titanium dioxide slag.
  • the residue may then be aeration and acid-leached to recover the titanium dioxide in the residue (S400).
  • the residues can be aerated by injecting air for 30 minutes to 30 hours.
  • the acid leaching can be carried out using 0.05 to 30% sulfuric acid for 5 minutes to 10 hours to remove iron in the residue.
  • the concentration of the sulfuric acid depends on the nature of the residue and may be chosen in relation to the leaching time in inverse proportion.
  • the titanium dioxide may be in the range of 88% to 95%.
  • iron is effectively removed from the residue through aeration and acid leaching to recover high-quality titanium dioxide.
  • FIG. 2 is a process flow diagram of a method for smelting smith using a red mud in accordance with another embodiment of the present invention.
  • a method for smelting a red moon by using red mud in accordance with another embodiment of the present invention includes a step (F100) of mixing a ilmenite concentrate and a red mud to form a mixture, A step (F200) of adding a carbon source and heating to reduce iron in the mixture to form a molten droplet; a step (F300) of removing iron from the molten droplet to remove iron and recovering the titanium dioxide slag (F300) step of the Bayer process (Bayer process) alumina (Al 2 O 3) recovery step (F400), and the alumina were adjusted to acid the titanium dioxide slag separated leach (acid-leaching) of the introduced to remove silica (SiO 2) (F500).
  • ilmenite concentrate and red mud are mixed to form a mixture (F100).
  • the ilmenite concentrate may be one obtained by benefiting from an ornamentation with an ornamenium ores.
  • the ilmenite concentrate may contain 17 to 50 wt% of titanium dioxide (TiO 2 ).
  • the quality of the ylmenite concentrate is generally 45% to 50%, but the higher the quality of titanium, the higher the process cost.
  • the ilmenite concentrate may contain 35 to 65% of titanium dioxide and the remaining iron oxide (FeO x ).
  • the acid iron is separated and recovered in the magnetic force sorting step.
  • the red mud may be waste generated in the aluminum oxide smelting process.
  • the red mud includes titanium dioxide (TiO 2 ), alumina (Al 2 O 3 ), and silica (SiO 2 ).
  • the pH of the red mud is very high, so it is difficult to dispose of the red mud, but when it is mixed with the luminol concentrate, iron and titanium dioxide contained in red mud can be separated and recovered.
  • the red mud may contain 5 to 10% by weight of titanium dioxide (TiO 2 ).
  • the titanium dioxide contained in the red mud can be recovered together with the titanium dioxide contained in the ylmnate concentrate.
  • the red mud includes alumina and silica.
  • the alumina and silica may be contained in the titanium dioxide slag produced by reduction, and in this case, the step of removing the alumina and silica is required because it reduces the quality of the titanium dioxide. In this case, a high-quality titanium dioxide can be obtained .
  • the red mud may contain, in addition to titanium dioxide, 30 to 40% by weight of residual hematite (Fe 2 O 3 ).
  • the red mud hematite may be reduced together with the iron component of the ilmenite concentrate to form a molten droplet and be physically separated through magnetic force selection.
  • Red mullite may be added in an amount of 10 to 200 parts by weight based on 100 parts by weight of the total sumuminate concentrate.
  • the red iron oxide contained in the red mite has a very fast reduction rate as compared with the ilmenite, so it is changed into reduced iron first.
  • the resulting reduced iron is carburized by carbon, has a low melting point and acts as a strong reducing agent itself, which facilitates the reduction of the ylmenite and increases the production of molten drops which are reduced iron.
  • the amount of the red mud is less than 10 parts by weight, the quality of the recovered titanium dioxide does not reach 97%.
  • the amount of the red mud is more than 200 parts by weight, the efficiency of the heating and iron reduction process becomes very low .
  • the mixture may be pressurized to form a pellet.
  • the efficiency of the step of heating and reducing afterward can be greatly increased, and the convenience of the operation in the reduction process using the rotary furnace or the sintering furnace can be greatly increased.
  • the carbon source is added to the mixture and heated to reduce the iron in the mixture to form a molten droplet (F200).
  • the carbon source may be any coal selected from bituminous coal consisting of peat, lignite and bituminous coal.
  • the carbon source has high volatility.
  • the carbon source can increase the reaction temperature in the step of heating and reducing the mixture, and the carbon reduced reduced iron itself becomes a very strong reducing agent, greatly increasing the efficiency of the reduction step and increasing the production of molten droplets .
  • the carbon source may be added in an amount of 10 to 100 parts by weight based on 100 parts by weight of the mixture.
  • the maximum reduction rate can be expected, and unreacted residual carbon can be recovered and reused.
  • the carbon source may be added to the mixture and the iron in the mixture may be reduced and roasted by heating at 1400 to 2000 ⁇ ⁇ for 15 minutes to 10 hours.
  • the mixture of irinite concentrate and red mud does not reach the melting temperature and does not melt.
  • the composition of alumina and silica can be controlled in the slag generated when heating is performed in the above range, The iron component can be physically separated.
  • the heating may be performed in any one selected from the group consisting of a sintering furnace, a rotary furnace and an arc furnace.
  • a carbon source can be added to easily raise the temperature to a set temperature, and the reaction temperature and the reaction time can be controlled while the reduction reaction proceeds It is very advantageous.
  • the heating When the heating is carried out in an arc furnace, it can be rapidly increased to a reduction temperature of 2000 ° C. and the weight of reduced iron is increased, thereby enabling gravity separtion.
  • the iron may be reduced and formed into a molten droplet form.
  • the iron oxide component in the ylmnate concentrate and the iron of the hematite contained in the red mud are reduced and discharged into the oxide, which is then discharged in the form of a molten droplet.
  • the irinite concentrate and red mud can be used to separate iron components in a single process, and the reduced iron can be easily recycled by physical selection.
  • the molten droplets are physically separated to remove iron, and the titanium dioxide slag is recovered (F300).
  • the iron component When the reduced iron is formed in the form of a molten droplet, the iron component aggregates and can easily be attracted to the magnetism.
  • the magnetite concentrate and the iron component in the red mud can be separated together in one step by magnetic force sorting.
  • the molten droplets are included in 25 to 30 wt% of the reduced material.
  • the weight of the molten droplet can be increased through the step of heating and reducing.
  • the titanium dioxide slag is separated from iron and removed, and the content of titanium dioxide derived from the ylmenite concentrate and red mud is increased, so that the quality of the titanium dioxide can be greatly increased.
  • the Bayer process refers to a process in which caustic soda is added at high temperature and high pressure and leached to discharge alumina into the crystal.
  • the titanium dioxide slag may contain alumina and silica derived from red mud.
  • the quality of the recovered titanium dioxide can be lowered.
  • the Bayer process may add caustic soda (NaOH) to the titanium dioxide slag and leach alumina at a pressure of 15-20 bar at 150-200 [deg.] C.
  • CaOH caustic soda
  • Alkali leaching by caustic soda is performed in the high-temperature and high-pressure range to recover alumina.
  • the temperature and pressure range are not satisfied, the leaching efficiency of alumina is reduced.
  • the Bayer process can leach alumina by adding caustic soda (NaOH) from 1.25 to 6.25 M to the titanium dioxide slag.
  • CaOH caustic soda
  • the alumina can be dissolved and precipitated in the above concentration range, and the silica contained in the titanium dioxide slag can be dissolved together and leached.
  • the titanium dioxide slag from which the alumina is separated is acid-leached to remove silica (SiO 2 ) (F 500).
  • the acid leaching can be carried out using 0.05 to 30% sulfuric acid for 5 minutes to 10 hours to remove the residual silica in the titanium dioxide slag.
  • the concentration of sulfuric acid depends on the nature of the residue and is inversely proportional to the leaching time.
  • the gangue component and the impurities can be completely removed from the titanium dioxide slag, and the residual iron and silica can be removed, and the quality of the titanium dioxide slag as a final product can be greatly increased.
  • the recovered titanium dioxide slag may be in the range of 70% to 97%.
  • the titanium dioxide slag is used as a high-quality titanium dioxide raw material such as a pigment.
  • a smelting method of ilmenite using red mud wherein alumina (Al 2 O 3 ) contained in red mud is separated and recycled, and alumina and silica are removed together with iron impurities
  • the quality of the remaining titanium dioxide slag can be greatly increased.
  • Example 1 Titanium dioxide recovery by aeration and acid leaching
  • a mixture of 100 g of the yluminate concentrate and 100 g of red mud was pressurized to prepare a single-phase light.
  • Powdered ilmenite and concentrate were uniformly mixed through a ball mill, and then made into a single piece using a pelletizer with a maximum pressure of 5 tons.
  • Bituminous coal was added to the single light and heated to 1450 ⁇ in a rotary kiln.
  • the molten droplets were separated using a magnetic separator, air was added to the residue, and the mixture was aerated and acid leached by the addition of 30% strength sulfuric acid.
  • FIG. 5 is a schematic view showing a configuration of a smithering smelting method using red mud in accordance with another embodiment of the present invention.
  • a mixture obtained by mixing 100 g of a lumineter and 100 g of red mignon was pressurized to prepare a single-phase light.
  • the powder was mixed uniformly with a ball mill through the ball mill, and the mixture was blended using a pelletizer with a maximum pressure of 5 tons.
  • Bituminous coal was added to the single light and reduced by heating in an arc furnace at 2000 ° C for 15 minutes.
  • the molten droplet was separated using a magnetic separator.
  • the molten droplets were removed to recover the titanium dioxide slag.
  • FIG. 6 is a photograph of the high-temperature high-pressure leaching apparatus.
  • caustic soda was charged into the high-temperature and high-pressure leaching apparatus together with the titanium dioxide slag from which the molten droplets were removed, and leached at 200 ° C. and 20 bar for 1 hour.
  • the components leached after leaching were analyzed to determine the content of alumina and silica in the titanium dioxide slag.
  • the titanium dioxide slag from which alumina was removed was acid leached by adding sulfuric acid at a concentration of 30%.
  • FIG. 3 is a photograph of ilmenite, red mud, and bituminous coal samples, which are starting materials, in the smelt smelting method using red mud, according to an embodiment of the present invention.
  • FIG. 4 is a photograph of a reduced iron heated and melted by heating in a smelting method using red mats according to an embodiment of the present invention.
  • Table 1 shows the result of analyzing the starting material yluminate concentrate and the red mud component according to the embodiment of the present invention by an energy dispersive X-ray fluorescence spectrometer. Referring to Table 1, it was confirmed that the irinite concentrate and the red mud contained the titanium dioxide component and the iron component necessary for separation and recovery.
  • Table 2 shows the composition of the titanium dioxide slag after the melting and the reduction step by heating.
  • the mixture of ilmenite and red mud is added, and when bituminous coal is added and heated in a rotary kiln to adjust the reaction temperature, the iron reacted with the bituminous coal becomes a strong reducing agent again, and most of the iron component is reduced to yield molten bubbles.
  • the smelting method using ilmenite according to the present invention utilizes the red mud which is a waste that is difficult to treat, it is possible to obtain high-quality titanium dioxide by smelting the low-grade aluminum halide in an environmentally friendly manner.
  • the red mud contains alumina and silica in addition to iron oxide, and remains after the reduction and after magnetic force separation to increase the load of the acid leaching process and reduce the quality of the recovered titanium dioxide.
  • FIG. 7 is a graph showing alumina and silica contents according to caustic soda concentration at the western stage of smelting smelting method using red mud, according to another embodiment of the present invention.
  • the concentration of caustic soda is 2.5 M or more
  • the content of alumina and silica can be effectively controlled to 3 wt% or less.
  • the iron component and the titanium dioxide component can be efficiently recovered by using the waste red mud.
  • the smelting method using the red mud can obtain various by-products using the red mud which is difficult to treat and can be recycled.
  • titanium oxide of high quality can be recovered separately from the iron component while greatly reducing the load of the acid treatment process.
  • the alumina and silica contained in the red mud are concentrated in the reduced titanium dioxide slag, it is introduced into the Bayer process and leached at high temperature and high pressure to remove silica as well as impurities alumina.
  • the alumina discharged into the crystal is recovered And can be reused.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

La présente invention concerne un procédé de fusion d'ilménite à l'aide de boue rouge, le procédé comprenant les étapes de : mélange d'un concentré d'ilménite et de boue rouge pour former un mélange ; ajout d'une source de carbone au mélange, puis chauffage pour réduire le fer dans le mélange et former une gouttelette fondue ; soumission de la gouttelette fondue à séparation magnétique pour éliminer le fer et récupérer un laitier de dioxyde de titane ; introduction du laitier de dioxyde de titane dans un procédé Bayer pour récupérer l'alumine (Al2O3) ; et soumission du laitier de dioxyde de titane débarrassé de l'alumine à lixiviation acide pour éliminer la silice (SiO2).
PCT/KR2018/004563 2017-04-19 2018-04-19 Procédé de fusion d'ilménite à l'aide de boue rouge Ceased WO2018194397A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2018256247A AU2018256247B2 (en) 2017-04-19 2018-04-19 Method for smelting ilmenite using red mud

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020170050662A KR101790128B1 (ko) 2017-04-19 2017-04-19 일메나이트를 이용한 이산화티타늄 제련방법
KR10-2017-0050662 2017-04-19
KR1020180041532A KR101900672B1 (ko) 2018-04-10 2018-04-10 적니를 활용한 일메나이트 제련방법
KR10-2018-0041532 2018-04-10

Publications (2)

Publication Number Publication Date
WO2018194397A1 WO2018194397A1 (fr) 2018-10-25
WO2018194397A4 true WO2018194397A4 (fr) 2018-11-22

Family

ID=63856074

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2018/004563 Ceased WO2018194397A1 (fr) 2017-04-19 2018-04-19 Procédé de fusion d'ilménite à l'aide de boue rouge

Country Status (2)

Country Link
AU (1) AU2018256247B2 (fr)
WO (1) WO2018194397A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA3244282A1 (fr) * 2021-02-16 2022-08-25 Gron Metallic Group Inc Procédé de récupération de métaux et d'oxydes à partir de stériles contenant du fer
CN115301400B (zh) * 2022-08-05 2023-11-07 中国地质科学院矿产综合利用研究所 一种超微细粒钛铁矿选矿的系统和方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0160753B1 (ko) * 1990-05-24 1998-11-16 마이클 존 홀리트 산용해성 티타니아의 제조방법
BR9609429A (pt) * 1995-07-11 2000-04-25 Comalco Alu Processo de precipitação de alto rendimento.
GB0313886D0 (en) * 2003-06-16 2003-07-23 Jha Animesh Extraction route for Ti02 and alumina from bauxite and bauxitic residues,and titaniferrous deposits and wastes
WO2012001700A1 (fr) * 2010-06-30 2012-01-05 Keki Hormusji Gharda Procédé d'extraction de métaux contenus dans des résidus et des minerais alumino-ferreux et titano-ferreux
CN102766715A (zh) * 2012-07-27 2012-11-07 胡长春 一种钛铁矿的无渣生产工艺
KR101790128B1 (ko) * 2017-04-19 2017-10-26 한국지질자원연구원 일메나이트를 이용한 이산화티타늄 제련방법

Also Published As

Publication number Publication date
WO2018194397A1 (fr) 2018-10-25
AU2018256247A1 (en) 2019-11-07
AU2018256247B2 (en) 2020-11-12

Similar Documents

Publication Publication Date Title
KR101900672B1 (ko) 적니를 활용한 일메나이트 제련방법
WO2012081897A2 (fr) Procédé de récupération et d'enrichissement de ferronickel à partir de matières premières contenant du nickel, procédé de récupération de nickel à partir de ferronickel encrichi, et procédé pour recycler la solution contenant du fer ainsi produite
WO2023182561A1 (fr) Procédé utilisant une extraction par solvant pour récupération sélective de métal de valeur à partir de déchets de batterie secondaire au lithium
WO2018117771A1 (fr) Procédé de récupération de nickel et de cobalt à partir de matière première contenant du nickel, du fer et du cobalt
WO2017105083A1 (fr) Système et procédé de fusion d'aluminium et recyclage de laitier noir
WO2019022555A1 (fr) Procédé de récupération sélective de métal précieux à partir d'un catalyseur de dénitrification de déchets par fusion alcaline
CN1060818C (zh) 生产水硬粘合料、粗钢、金属和/或合金例如铁铬合金或铁钒合金的方法
WO2023282564A1 (fr) Procédé à haute valeur ajoutée pour la récupération de ressources à partir de boue de lithium et de boue de fluorure
WO2023243827A1 (fr) Méthode de production d'une solution aqueuse contenant du nickel ou du cobalt
WO2022045724A1 (fr) Procédé de préparation d'un substitut de calcaire pour frittage de minerai de fer utilisant des coquilles
JP3535629B2 (ja) スクラップ類からの有価金属のリサイクル方法
WO2011081267A1 (fr) Procédé et appareil pour la récupération de métaux de valeur à partir de scories et pour la production d'agrégats multifonctions
KR101790128B1 (ko) 일메나이트를 이용한 이산화티타늄 제련방법
CA2668506C (fr) Recuperation de metaux non ferreux a partir de sous-produits de l'industrie de production du zinc et du plomb utilisant la fusion electrique avec plasma immerge
WO2018194397A4 (fr) Procédé de fusion d'ilménite à l'aide de boue rouge
WO2024076100A1 (fr) Procédé de récupération d'hydroxyde de nickel et de sulfate de nickel à partir de matériaux contenant du nickel
WO2023282565A1 (fr) Procédé de réduction partielle de pentoxyde de vanadium à l'aide d'une solution ammoniacale, et poudre de dioxyde de vanadium ainsi préparée
WO2023121346A1 (fr) Appareil de production de bicarbonate de sodium à partir de sous-produits industriels contenant du sulfate de sodium
WO2012081896A2 (fr) Procédé pour récupérer le nickel à partir de matières premières contenant du nickel
WO2024167210A1 (fr) Méthode de production d'oxyde de magnésium de haute pureté à partir de matériau réfractaire usagé par un procédé d'application hydrométallurgique écologique et oxyde de magnésium ainsi produit
WO2021132891A1 (fr) Flux à base d'aluminate de calcium utilisant un sous-produit industriel, son procédé de fabrication et procédé de désulfuration d'acier fondu l'utilisant
WO2010074516A2 (fr) Procédé de préparation d'oxyde de zinc très pur au moyen de poussière secondaire
WO2013100333A1 (fr) Dispositif de réduction de poudre de minerai de fer, dispositif de production de fer fondu et de fer réduit et procédé correspondant
WO2024058441A1 (fr) Procédé de récupération de métal du groupe du platine à partir de déchets de catalyseur en utilisant du biocyanure et du liquide ionique
WO2018216886A1 (fr) Procédé de préparation d'hydrogène gazeux

Legal Events

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

Ref document number: 18788030

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018256247

Country of ref document: AU

Date of ref document: 20180419

Kind code of ref document: A

122 Ep: pct application non-entry in european phase

Ref document number: 18788030

Country of ref document: EP

Kind code of ref document: A1