[go: up one dir, main page]

US20050151307A1 - Method and apparatus for producing molten iron - Google Patents

Method and apparatus for producing molten iron Download PDF

Info

Publication number
US20050151307A1
US20050151307A1 US10/953,735 US95373504A US2005151307A1 US 20050151307 A1 US20050151307 A1 US 20050151307A1 US 95373504 A US95373504 A US 95373504A US 2005151307 A1 US2005151307 A1 US 2005151307A1
Authority
US
United States
Prior art keywords
melting furnace
iron
molten iron
producing molten
gas
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.)
Abandoned
Application number
US10/953,735
Other languages
English (en)
Inventor
Ricardo Viramontes-Brown
Juan Villarreal-Trevino
Ronald Victor Lopez-Gomez
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.)
Hylsa SA de CV
Original Assignee
Hylsa SA de CV
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
Application filed by Hylsa SA de CV filed Critical Hylsa SA de CV
Priority to US10/953,735 priority Critical patent/US20050151307A1/en
Priority to PCT/IB2004/003483 priority patent/WO2005031009A2/fr
Priority to RU2006114771/02A priority patent/RU2006114771A/ru
Priority to AU2004276579A priority patent/AU2004276579A1/en
Priority to BRPI0414951-3A priority patent/BRPI0414951A/pt
Priority to EP04769713A priority patent/EP1670958A2/fr
Assigned to HYLSA S.A. DE C.V. reassignment HYLSA S.A. DE C.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LOPEZ-GOMEZ, RONALD VICTOR MANUEL, VILLARREAL-TREVINO, JUAN ANTONIO, VIRAMONTES-BROWN, RICARDO
Publication of US20050151307A1 publication Critical patent/US20050151307A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
    • C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
    • C21B13/002—Reduction of iron ores by passing through a heated column of carbon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C21B13/143—Injection of partially reduced ore into a molten bath
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
    • C21B2100/22—Increasing the gas reduction potential of recycled exhaust gases by reforming
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
    • C21B2100/28—Increasing the gas reduction potential of recycled exhaust gases by separation
    • C21B2100/282—Increasing the gas reduction potential of recycled exhaust gases by separation of carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
    • C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C21B2100/64—Controlling the physical properties of the gas, e.g. pressure or temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen

Definitions

  • the present invention relates to the field of producing iron material usable for steel-making and other processes. Specifically, the present invention is directed to the combination of direct reduction of iron-oxides in a moving bed reduction reactor, a melting furnace where the reduced iron material is converted into molten iron, and a reduction gas generator furnace.
  • Blast furnaces continue to be the preferred method of producing molten iron in the steel industry due to their high productivity. Blast furnaces, however, require costly coke. This has several drawbacks, not the least of which is that coking coal is not found throughout the world. Thus, in many instances it must be imported at great cost to the iron producer. Further, the transformation of coal to coke requires a coking plant. Along with the cost associated with transforming coal into coke, coking plants are not considered environmentally friendly under new pollution regulations in many countries. As a result, many producers are looking for alternative methods of producing iron that will essentially eliminate the need for a separate coking plant, and a process for producing iron that requires much less coke.
  • Stift discloses a method and apparatus for reducing iron ores in a shaft furnace, which is integrated to a melting furnace. Iron ores are introduced into the upper portion of the shaft without addition of coke and descend through the shaft in countercurrent to ascending reducing gases produced outside the furnace through partial combustion.
  • Hot reducing gases and powdered carbon are introduced toward a molten iron bath in the melting portion of the furnace, Stift's process however requires additional heat to be provided to the hot gases besides the heat produced by the partial combustion, and the integration of the reduction shaft with the melting furnace does not allow for providing the optimal conditions for the three main processes involved, namely: reduction of ores, melting of reduced ores and production of reducing gases.
  • the Von Bogdandy process is similar in some respects also requiring additional heat for melting the reduced ores by providing electrical energy to the iron bath.
  • U.S. Patents Nos. 4,504,043 and 4,564,389 to Yamaoka et al. describe a process and apparatus for coal gasification and making pig iron.
  • These patents disclose a melting furnace separate from the shaft reduction furnace, where the reducing gases are formed under conditions determined by the combustion of a fuel in the melting furnace.
  • the melting furnace comprises a bed of coke filling most of the volume of the furnace.
  • On top of the bed of coke a layer of reduced iron ore is laid which is melted by the heat of hot gases ascending through said bed of coke.
  • High temperature reducing gases are produced by partial combustion of a fuel, e.g. pulverized coal, heavy oil, natural gas, etc.
  • the molten iron and slag are discharged from the lower portion of the melting furnace and the hot gases are withdrawn and utilized for reducing iron ores in a reduction shaft associated with the melting furnace, or for other purposes.
  • Yamaoka has not been utilized in the steel industry because it presents several disadvantages. For example, since the oxidation reactions of the fuel take place inside the melting furnace, some of the reactants may react with the bed of coke and consume the coke. Coke consumption causes an increase in operation costs both because of cost and because replenishment of the consumed coke requires special openings or operations in the use of the melting furnace.
  • U.S. Pat. No. 5,149,363 to Contrucci et al. discloses a process and a furnace for melting metal and smelting iron ores producing a molten iron material. This process has a shaft above a melting furnace.
  • the utilization of the energy of gases produced by combustion of pulverized coal, liquid or gaseous hydrocarbons with oxygen in the melting furnace is improved by supplying air or oxygen at different locations in the shaft whereby heat is produced by oxidation of such gases which is used for promoting iron reduction of carbon-containing self-reducing pellets.
  • this process is used for melting metallized material, for example, scrap or pig iron, as in cupola furnaces, the coke consumption is significantly decreased because no coke is added to the burden, which thereby avoids any reaction of coke with the ascending reduction gases.
  • this process does not separate the gas generation zone and equipment from the melting furnace.
  • Another known melting-gasifier furnace effects partial combustion of coal in a chamber coaxial to the melting furnace, whereby the gases produced impinge on the molten iron bath and then ascend counter-currently to iron containing particles descending through said furnace.
  • This patent presents a separate chamber for partial combustion but presents a significant disadvantage because said chamber is located inside the melting furnace with considerable cost for special materials and design so that the structure withstands the high-temperature environment within said furnace.
  • the present invention is directed to overcoming these and other shortcomings of the prior art.
  • reaction zones or equipment e.g. a reducing gas generation zone, a moving bed reduction zone and melting zone.
  • the objects of the invention will be generally achieved by providing a system for producing molten iron from iron ores in form of lumps or pellets, comprising three separated reaction zones or furnaces: (1) a direct reduction shaft furnace, (2) a melting furnace, and (3) a reducing gas generation furnace; said system being characterized by: (a) producing a reduced intermediate product with a predetermined degree of metallization and carburization in said reduction furnace by reaction of said ores with a high-temperature reducing and carburizing gas; (b) charging said reduced intermediate product into said melting furnace upon a coke bed, whereby said reduced intermediate product is melted by contact with said high-temperature reducing gas; and (c) producing a reducing gas in a reducing gas generation zone by partial combustion of a hydrocarbon fuel with an oxygen-containing gas and steam; and (d) transferring said reducing gas into said melting furnace preventing any free oxygen from contacting said coke bed in said melting furnace, whereby any combustion of said coke bed is minimized.
  • FIG. 1 shows a schematic diagram of one embodiment of the present invention for producing the reducing gases and for distributing said gases in the melting furnace.
  • FIG. 2 shows a schematic diagram of a second embodiment of the present invention for producing the reducing gases and for distributing said gases in the melting furnace.
  • FIG. 3 is a graph showing the preferred ratio of oxygen to natural gas for melting iron according to one embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a further embodiment of the present invention for producing the reduction gases and for distributing said gases in the melting furnace where DRI is produced remotely.
  • FIG. 1 a melting furnace 10 having a crucible section 12 and a charging shaft 14 is shown.
  • a bed of coke 16 fills a major portion of the crucible section 12 providing a porous support for a bed 18 of metallic-iron-containing particles which descend through the shaft section 14 as said iron particles melt down.
  • the high-temperature reducing gas 20 produced in a plurality of gas generating zones 22 passes through the coke bed 16 with a composition comprising in its major part hydrogen and carbon monoxide, however, the mixture may contain some carbon dioxide and water, the classic by-products of combustion, and also some methane or other un-burnt fuel.
  • the actual composition of the reducing gases 20 will depend on the type of fuel utilized and will be adjusted to a desired reducing potential value by reacting a fuel 24 and a free oxygen-containing gas 26 .
  • Flow rates of fuel and oxygen-gas are regulated by suitable control valves 33 and 35 .
  • Fuel 24 may be any hydrocarbon in solid, liquid or gaseous form. Natural gas may be utilized with advantages except for its unavailability in many places and its wide price fluctuation. Liquid hydrocarbons, such as naphtha, “bunker C” oil, and waste oils can be utilized, as well as coal ground to a suitable particle size so as to be handled as slurry with a liquid hydrocarbon and fed to burners 30 .
  • Pure oxygen is preferred as oxidant for partially combusting the fuel, since the presence of nitrogen in the reducing gases will limit the amount of reducing gas, which may be recycled to the reduction reactor, but air and oxygen-enriched air in burners 44 can also be used for melting the reduced materials.
  • the reacting materials in burner 30 produce a high-temperature flame 20 , between about 2,000° C. and about 2,500° C.
  • the gas-generating zones 22 are designed so that, preferably, the flame does not directly impinge in its refractory-lined walls.
  • the gas-generating zones 22 are also designed so that the reaction volume allows for total consumption of the free-oxygen-containing gas before such gases are introduced into the melting furnace and contact the coke bed 16 .
  • said gas-generating zone has a length of at least about 0.6 m., preferably more than about 0.8 m.
  • other lengths of the gas-generating zone will be apparent to those of skill in the art and are contemplated to be within the scope of the instant invention. The exact length is not by itself as important to the process of the present invention as combustion to a point of using all free oxygen and preventing contact of free-oxygen with the coke.
  • this length of the gas-generating zone 22 is to minimize the consumption of the coke and consequently the amount of coke, which must be replaced in the melting furnace, is minimized.
  • This goal is largely achieved by ensuring that substantially all of the free oxygen is used in combustion prior to the reducing gases contacting the coke. By accomplishing this, there is nearly no oxygen remaining to oxidize or burn the coke. By preventing the coke from burning, a major cost from a potentially consumable material of the iron making process is minimized, thereby reducing the overall cost of the process.
  • other fuels such as coal, oil, petcoke and the like, which are much less expensive, the efficiency and cost of iron making is substantially reduced.
  • the reduced-iron-containing material (DRI) 18 is melted and flows down through the coke bed 16 to the bottom portion of melting furnace 10 wherefrom it is extracted through discharge channel 32 into molds (not shown) in a manner known in the art.
  • the melting furnace 10 is preferably operated under pressure, in the order of 1 to 10 kg/cm 2 , preferably from about 4 to 6 kg/cm 2 , so that the effluent gas 34 from outlet 36 may be injected into the reducing gas circuit of reduction reactor 38 , without need of any pumping means.
  • the effluent gas is at a temperature of about 400 to 800° C.
  • Iron-containing materials DRI (sponge iron) 39 , and other materials, for example, limestone 48 , limestone and fluxes 50 , coke 52 and DRI or scrap iron 53 are charged into melting furnace 10 through a bins-and-valve system comprising an atmospheric bin 40 , a pressurized bin 42 and seal valves 44 and 46 . Materials are charged to bin 40 and transferred to bin 42 by opening valve 44 while valve 46 is closed and then closing valve 44 , pressurizing bin 42 and opening valve 46 , in a manner known in the industry. Coke is charged in the amount necessary to make-up coke bed 16 as some coke is incidentally gasified by the heat of gases 20 . Iron briquettes, iron scrap and the like may also be charged to melting furnace 10 for melting.
  • DRI sponge iron
  • Reduction reactor 38 comprises an upper reduction zone 54 and a lower discharge zone 56 .
  • Iron oxides in the form of lumps, pellets or mixtures thereof in suitable sizes, are charged into reduction zone 54 by any suitable means known in the art depending on the level of pressure under which the reactor is operated, for example a bins and valves means or a charging leg filled with an inert sealing gas.
  • Iron oxides pellets descend by gravity through reduction zone 54 in contact with an ascending stream of reducing gases at a temperature between about900° C. and about 1100° C., whereby iron oxides are converted to metallic iron.
  • the DRI or sponge iron is charged into the melting furnace 10 as needed.
  • exhausted reducing gas 60 is withdrawn from reactor 38 and passes through heat exchanger 62 where water from source 64 is made into steam 65 that can be used in burners 24 or CO 2 removal system 78 .
  • the exhausted reducing gas 60 is then cooled down in cooler 66 by, for example, contacting said gas with water. This process condenses any residual water content out of the exhausted reducing gas.
  • a minor portion 68 of the cooled gas, regulated by control valve 70 is purged from the reduction circuit thus eliminating inert gases and simultaneously regulating the pressure of the system.
  • the major portion 72 of the cooled gas is then pumped by compressor means 74 and is fed to a CO 2 removal system 78 in order to remove carbon dioxide. This has the effect of regenerating the reducing potential of the gas.
  • the CO2 removal system 78 may be of the absorption type where the gas is contacted with a liquid or of the adsorption type (pressure or volume swing adsorption).
  • Recycled reducing gas 80 if necessary, is then combined with natural gas 82 from a suitable source 84 and heated in gas heater 90 to a temperature in the range from about 750° C. to about 950° C. Natural gas is also utilized, as required, in the burners of heater 90 , combined with a portion 88 of reducing gas produced in melting furnace 10 .
  • Hot gas from heater 90 is combined in variable proportions with more natural gas 92 from a suitable source 94 , a free-oxygen-containing gas 96 from source 98 , which may be molecular oxygen or oxygen-enriched air, and effluent gasses 34 from the melting furnace 10 .
  • Free-oxygen injection produces a partial combustion of hydrocarbons in the hot gas 58 increasing its temperature in the range from about 1000° C. to about 1150° C. and is then fed to the reduction reactor 38 for producing the DRI or sponge iron 39 .
  • FIG. 2 depicts a further embodiment of the present invention, wherein like numbers designate similar or equivalent elements described with reference to FIG. 1 .
  • the apparatus depicted in FIG. 2 is used to produce molten iron or pig iron from iron ore.
  • the apparatus includes a melting furnace 10 , a reduction or shaft furnace 38 , and a reduction gas-generating furnace 21 .
  • the melting furnace 10 includes a coke bed 16 on which reduced iron 18 or DRI or sponge iron is deposited for melting. Iron is conveyed into the reduction furnace 38 by conventional means, and is therein reduced to form DRI. Heated gases are provided to the reduction chamber 38 to heat the iron ore, in part through the use of a reducing gas generator 21 .
  • the reducing gas generator 21 includes one or more burners 31 which burn hydrocarbon fuels including but not limited to coal, oil, petcoke, and the like.
  • the burner 31 is connected to a variety of piping systems 24 , 26 that can include oxygen systems, fuel systems, steam systems, and others.
  • Oxygen is used to effect a partial combustion of the hydrocarbons which are supplied by the fuel systems and steam may also be used to both atomize the fuel for combustion and to increase the temperature of the mixture before combustion.
  • the partial burning of a fuel such as petcoke creates a high temperature, high-pressure reduction gas, which is injected into the melting furnace 10 through a passage 23 .
  • the gas is typically above about 14000 C and has a reducing composition before it contacts the coke bed 16 .
  • These gases are distributed around the periphery of the crucible section 12 by a gas distribution plenum 25 formed in the refractory lining 27 and having nozzles (not shown) around said melting zone 12 .
  • valves 33 and 35 regulate the flow rates of fuel 24 and oxygen-gas 26 respectively, in order to adjust the temperature and composition of the reducing gas produced.
  • Gas generating chamber 21 is provided with a bottom outlet 100 and a shut-off valve 102 for withdrawing ashes, slag and impurities, which may accumulate therein.
  • the reduction gas After passing through the DRI that has been charged into the melting furnace 10 , the reduction gas is vented through a connection pipe 36 to the reduction furnace 38 .
  • the reduction gas In the reduction furnace the reduction gas is used to transform the iron ore into DRI for use in the melting furnace.
  • the reduction furnace 38 operates substantially the same as the reduction furnace described with relation to the embodiment shown in FIG. 1 .
  • the graph shows the preferred operating range of the ratio of volume of oxygen to volume of natural gas in the gas generating zones 22 or the gas generating furnace 21 so that the temperature of the gases reach such a level as to melt the DRI, and also that the amount of heat produced is sufficient to melt the required amount of DRI and at the same time provide sufficient amounts of reducing gases (H2+CO) for reducing the iron oxides in furnace 38 to DRI.
  • H2+CO reducing gases
  • the preferred range of the ratio of oxidant to fuel for operating a melting furnace must comply with the above-mentioned requirements for the process to be economically attractive.
  • the concept of preferred range of oxygen to fuel ratio has been herein illustrated for natural gas it can be applied to other fuels.
  • the preferred range is from about 0.86 to about 1.04.
  • FIG. 4 depicts an embodiment of the present invention where the reduced-iron-containing material is produced at a location remote from the molten-iron producing plant and charged into the melting furnace via DRI bin 39 .
  • This embodiment may be useful in an instance where a steel making plant buys DRI from DRI-merchant plants.
  • the hot reducing gases produced in the melting furnace 10 may then be utilized as fuel, synthesis gas or power generation after having been used in the melting furnace 10 and vented by connection pipe 36 .
  • Such an embodiment may also be useful in increasing the productivity of electric arc furnaces where molten iron is charged into an electric furnace thereby reducing melting time and electricity consumption.
  • FIG. 4 of the present invention there is shown an application where the reducing gas effluent 34 from said melting furnace is recycled therein.
  • Numerals in FIG. 4 designate the same elements as in FIG. 1 .
  • Reducing gases 34 effluent from melting furnace 10 are cooled and cleaned in heat exchanger 62 and cooler 66 and are then recycled through compressor means 74 , passed through a CO 2 removal system 78 and then heated to a temperature above about 800° C. and then recycled to said melting furnace 10 in order to utilized them as much as possible for melting DRI.
  • This gas recycle increases the efficiency of a melting furnace.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture Of Iron (AREA)
  • Furnace Details (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US10/953,735 2003-09-30 2004-09-29 Method and apparatus for producing molten iron Abandoned US20050151307A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US10/953,735 US20050151307A1 (en) 2003-09-30 2004-09-29 Method and apparatus for producing molten iron
PCT/IB2004/003483 WO2005031009A2 (fr) 2003-09-30 2004-09-30 Procede et appareil de production de fonte
RU2006114771/02A RU2006114771A (ru) 2003-09-30 2004-09-30 Способ и устройство для получения расплавленного железа
AU2004276579A AU2004276579A1 (en) 2003-09-30 2004-09-30 Method and apparatus for producing molten iron
BRPI0414951-3A BRPI0414951A (pt) 2003-09-30 2004-09-30 método e aparelho para produzir ferro fundido
EP04769713A EP1670958A2 (fr) 2003-09-30 2004-09-30 Procede et appareil de production de fonte

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US50716003P 2003-09-30 2003-09-30
US10/953,735 US20050151307A1 (en) 2003-09-30 2004-09-29 Method and apparatus for producing molten iron

Publications (1)

Publication Number Publication Date
US20050151307A1 true US20050151307A1 (en) 2005-07-14

Family

ID=34396341

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/953,735 Abandoned US20050151307A1 (en) 2003-09-30 2004-09-29 Method and apparatus for producing molten iron

Country Status (6)

Country Link
US (1) US20050151307A1 (fr)
EP (1) EP1670958A2 (fr)
AU (1) AU2004276579A1 (fr)
BR (1) BRPI0414951A (fr)
RU (1) RU2006114771A (fr)
WO (1) WO2005031009A2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090211401A1 (en) * 2006-01-06 2009-08-27 Eugenio Zendejas-Martinez Method for the direct reduction of iron oxides to metallic iron utilizing coke oven gas or the like
JP2012529569A (ja) * 2009-06-10 2012-11-22 ガルダ，ケキ，ホルムスジ 鉄、セミスチールおよび還元ガスを生産する装置と方法
WO2015095635A1 (fr) * 2013-12-20 2015-06-25 Grede Llc Four à cuve et son procédé de fonctionnement
US10337076B2 (en) * 2014-02-10 2019-07-02 Primetals Technologies Austria GmbH Pneumatic ore charging
WO2022271576A1 (fr) * 2021-06-22 2022-12-29 Midrex Technologies, Inc. Système et procédé de production de fer briqueté à chaud (hbi) contenant un fondant et/ou une matière carbonée
WO2024164076A1 (fr) * 2023-02-08 2024-08-15 Hatch Ltd. Système et procédé d'alimentation d'un four électrique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016148555A1 (fr) * 2015-03-13 2016-09-22 Сулейман Мустафьевич ТЛЕУГАБУЛОВ Procédé de fusion réductrice d'acier et dispositif pour sa mise en oeuvre

Citations (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889219A (en) * 1956-12-28 1959-06-02 Inland Steel Co Control method and apparatus for iron ore reduction process
US2919983A (en) * 1958-05-22 1960-01-05 Inland Steel Co Iron ore reduction process
US2928730A (en) * 1957-01-15 1960-03-15 Inland Steel Co Iron ore reduction process
US3236628A (en) * 1960-09-14 1966-02-22 Huettenwerk Oberhausen Ag Process and plant for producing molten pig iron
US3282677A (en) * 1963-04-30 1966-11-01 Futakuchi Method of manufacturing iron by low temperature reduction with use of methane gas
US4001008A (en) * 1974-08-06 1977-01-04 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Method and apparatus for the reduction of ores, especially iron ores
US4007034A (en) * 1974-05-22 1977-02-08 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Method for making steel
US4246024A (en) * 1979-10-31 1981-01-20 Grupo Industrial Alfa, S.A. Method for the gaseous reduction of metal ores using reducing gas produced by gasification of solid or liquid fossil fuels
US4248626A (en) * 1979-07-16 1981-02-03 Midrex Corporation Method for producing molten iron from iron oxide with coal and oxygen
US4316739A (en) * 1979-07-16 1982-02-23 Midrex Corporation Method for producing molten iron
US4504043A (en) * 1981-06-10 1985-03-12 Sumitomo Metal Industries, Ltd. Apparatus for coal-gasification and making pig iron
US4571259A (en) * 1985-01-18 1986-02-18 Westinghouse Electric Corp. Apparatus and process for reduction of metal oxides
US4664389A (en) * 1985-10-08 1987-05-12 Barclay Precision Toys Inc. Toy car and method of utilzing same
US4673432A (en) * 1985-01-31 1987-06-16 Korf Engineering Gmbh Process for the production of pig iron
US4854967A (en) * 1984-10-12 1989-08-08 Korf Engineering Gmbh Process for producing carburized sponge iron
US4857105A (en) * 1986-12-23 1989-08-15 Korf Engineering Gmbh Process for producing pig iron using coal degassing reactor to form reductants
US4925489A (en) * 1987-08-21 1990-05-15 Voest-Alpine Stahl Donawitz Gesellschaft M.B.H. Process for melting scrap iron, sponge iron and/or solid pig iron
US4978387A (en) * 1988-10-25 1990-12-18 Deutsche Voest-Alpine Industrienalagenbau Gmbh Process for the production of molten pig iron
US5149363A (en) * 1986-10-13 1992-09-22 Setepla Tecnometal Engenharia Process for smelting or melting ferrous or non-ferrous metal from self-reducing agglomerates or metal
US5238487A (en) * 1990-11-29 1993-08-24 Deutsche Voest Alpine Industrieanlagenbau Gmbh Process for the production of pig iron and sponge iron
US5320676A (en) * 1992-10-06 1994-06-14 Bechtel Group, Inc. Low slag iron making process with injecting coolant
US5397376A (en) * 1992-10-06 1995-03-14 Bechtel Group, Inc. Method of providing fuel for an iron making process
US5413622A (en) * 1993-12-16 1995-05-09 Bechtel Group, Inc. Method of making hot metals with totally recycled gas
US5470375A (en) * 1993-06-30 1995-11-28 Bechtel Group, Inc. Method of processing waste material containing non ferrous metal oxides
US5584910A (en) * 1992-10-22 1996-12-17 Pohang Iron & Steel Co., Ltd. Process for producing molten pig iron or molten steel pre-products
US5669955A (en) * 1992-11-30 1997-09-23 Vuletic; Bogdan Process for producing pig iron from iron ores, and applicance for the thermal and/or chemical treatment of a readily disintegrating material or for producing pig iron by means of said process
US5948139A (en) * 1995-07-19 1999-09-07 Voest-Alpine Industrieanlagenbau Gmbh Process for the production of molten pig iron or steel pre-products and a plant for carrying out the process
US5997609A (en) * 1994-12-01 1999-12-07 Voest-Alpine Industrieanlagenbau Gmbh Sponge iron production process and plant
US5997608A (en) * 1994-10-17 1999-12-07 Voest-Alpine Industrieanlagenbau Gmbh Process for the production of molten pig iron or molten steel, pre-products and sponge iron and a plant for carrying out the process
US6129776A (en) * 1996-01-26 2000-10-10 Nippon Steel Corporation Operation method of vertical furnace
US6174346B1 (en) * 1995-11-03 2001-01-16 Technological Resource Pty. Ltd. Duplex procedure for the production of metals and metal alloys from oxidic metal ores
US6235083B1 (en) * 1996-07-10 2001-05-22 Deutsche Voest-Alpine Industrieanlagenbau Gmbh. Method for producing a reducing gas serving for the reduction of metal ore
US6264722B1 (en) * 1995-07-19 2001-07-24 Voest-Alpine Process for producing liquid pig iron or intermediate steel products and installation for implementing it
US6264725B1 (en) * 1996-10-08 2001-07-24 Voest-Alpine Industrieanlagenbau Gmbh Method for producing liquid pig iron or steel fabricated materials and installation for implementing said method
US6273934B1 (en) * 1996-10-07 2001-08-14 Technological Resouces Pty. Ltd. Method and an apparatus for producing metals and metal alloys
US6315943B1 (en) * 1996-12-17 2001-11-13 Voest-Alpine Industrieanlagenbau Gmbh Apparatus for producing molten metal

Patent Citations (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889219A (en) * 1956-12-28 1959-06-02 Inland Steel Co Control method and apparatus for iron ore reduction process
US2928730A (en) * 1957-01-15 1960-03-15 Inland Steel Co Iron ore reduction process
US2919983A (en) * 1958-05-22 1960-01-05 Inland Steel Co Iron ore reduction process
US3236628A (en) * 1960-09-14 1966-02-22 Huettenwerk Oberhausen Ag Process and plant for producing molten pig iron
US3282677A (en) * 1963-04-30 1966-11-01 Futakuchi Method of manufacturing iron by low temperature reduction with use of methane gas
US4007034A (en) * 1974-05-22 1977-02-08 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Method for making steel
US4001008A (en) * 1974-08-06 1977-01-04 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Method and apparatus for the reduction of ores, especially iron ores
US4248626A (en) * 1979-07-16 1981-02-03 Midrex Corporation Method for producing molten iron from iron oxide with coal and oxygen
US4316739A (en) * 1979-07-16 1982-02-23 Midrex Corporation Method for producing molten iron
US4246024A (en) * 1979-10-31 1981-01-20 Grupo Industrial Alfa, S.A. Method for the gaseous reduction of metal ores using reducing gas produced by gasification of solid or liquid fossil fuels
US4504043A (en) * 1981-06-10 1985-03-12 Sumitomo Metal Industries, Ltd. Apparatus for coal-gasification and making pig iron
US4854967A (en) * 1984-10-12 1989-08-08 Korf Engineering Gmbh Process for producing carburized sponge iron
US4571259A (en) * 1985-01-18 1986-02-18 Westinghouse Electric Corp. Apparatus and process for reduction of metal oxides
US4673432A (en) * 1985-01-31 1987-06-16 Korf Engineering Gmbh Process for the production of pig iron
US4664389A (en) * 1985-10-08 1987-05-12 Barclay Precision Toys Inc. Toy car and method of utilzing same
US5149363A (en) * 1986-10-13 1992-09-22 Setepla Tecnometal Engenharia Process for smelting or melting ferrous or non-ferrous metal from self-reducing agglomerates or metal
US4857105A (en) * 1986-12-23 1989-08-15 Korf Engineering Gmbh Process for producing pig iron using coal degassing reactor to form reductants
US4925489A (en) * 1987-08-21 1990-05-15 Voest-Alpine Stahl Donawitz Gesellschaft M.B.H. Process for melting scrap iron, sponge iron and/or solid pig iron
US4978387A (en) * 1988-10-25 1990-12-18 Deutsche Voest-Alpine Industrienalagenbau Gmbh Process for the production of molten pig iron
US5238487A (en) * 1990-11-29 1993-08-24 Deutsche Voest Alpine Industrieanlagenbau Gmbh Process for the production of pig iron and sponge iron
US5320676A (en) * 1992-10-06 1994-06-14 Bechtel Group, Inc. Low slag iron making process with injecting coolant
US5397376A (en) * 1992-10-06 1995-03-14 Bechtel Group, Inc. Method of providing fuel for an iron making process
US5630862A (en) * 1992-10-06 1997-05-20 Bechtel Group, Inc. Method of providing fuel for an iron making process
US5584910A (en) * 1992-10-22 1996-12-17 Pohang Iron & Steel Co., Ltd. Process for producing molten pig iron or molten steel pre-products
US5669955A (en) * 1992-11-30 1997-09-23 Vuletic; Bogdan Process for producing pig iron from iron ores, and applicance for the thermal and/or chemical treatment of a readily disintegrating material or for producing pig iron by means of said process
US5470375A (en) * 1993-06-30 1995-11-28 Bechtel Group, Inc. Method of processing waste material containing non ferrous metal oxides
US5413622A (en) * 1993-12-16 1995-05-09 Bechtel Group, Inc. Method of making hot metals with totally recycled gas
US5997608A (en) * 1994-10-17 1999-12-07 Voest-Alpine Industrieanlagenbau Gmbh Process for the production of molten pig iron or molten steel, pre-products and sponge iron and a plant for carrying out the process
US5997609A (en) * 1994-12-01 1999-12-07 Voest-Alpine Industrieanlagenbau Gmbh Sponge iron production process and plant
US5948139A (en) * 1995-07-19 1999-09-07 Voest-Alpine Industrieanlagenbau Gmbh Process for the production of molten pig iron or steel pre-products and a plant for carrying out the process
US6264722B1 (en) * 1995-07-19 2001-07-24 Voest-Alpine Process for producing liquid pig iron or intermediate steel products and installation for implementing it
US6174346B1 (en) * 1995-11-03 2001-01-16 Technological Resource Pty. Ltd. Duplex procedure for the production of metals and metal alloys from oxidic metal ores
US6129776A (en) * 1996-01-26 2000-10-10 Nippon Steel Corporation Operation method of vertical furnace
US6235083B1 (en) * 1996-07-10 2001-05-22 Deutsche Voest-Alpine Industrieanlagenbau Gmbh. Method for producing a reducing gas serving for the reduction of metal ore
US6273934B1 (en) * 1996-10-07 2001-08-14 Technological Resouces Pty. Ltd. Method and an apparatus for producing metals and metal alloys
US6264725B1 (en) * 1996-10-08 2001-07-24 Voest-Alpine Industrieanlagenbau Gmbh Method for producing liquid pig iron or steel fabricated materials and installation for implementing said method
US6315943B1 (en) * 1996-12-17 2001-11-13 Voest-Alpine Industrieanlagenbau Gmbh Apparatus for producing molten metal
US20020008337A1 (en) * 1996-12-17 2002-01-24 Voest-Alpine Industrieanlagenbau Gmbh, Pohang Iron & Steel Co., Ltd. Method of producing molten metal

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090211401A1 (en) * 2006-01-06 2009-08-27 Eugenio Zendejas-Martinez Method for the direct reduction of iron oxides to metallic iron utilizing coke oven gas or the like
US8377168B2 (en) * 2006-01-06 2013-02-19 Hyl Technologies, S.A. De C.V. Method for the direct reduction of iron oxides to metallic iron utilizing coke oven gas or the like
JP2012529569A (ja) * 2009-06-10 2012-11-22 ガルダ，ケキ，ホルムスジ 鉄、セミスチールおよび還元ガスを生産する装置と方法
WO2015095635A1 (fr) * 2013-12-20 2015-06-25 Grede Llc Four à cuve et son procédé de fonctionnement
US9797023B2 (en) 2013-12-20 2017-10-24 Grede Llc Shaft furnace and method of operating same
US10337076B2 (en) * 2014-02-10 2019-07-02 Primetals Technologies Austria GmbH Pneumatic ore charging
WO2022271576A1 (fr) * 2021-06-22 2022-12-29 Midrex Technologies, Inc. Système et procédé de production de fer briqueté à chaud (hbi) contenant un fondant et/ou une matière carbonée
US12000011B2 (en) 2021-06-22 2024-06-04 Midrex Technologies, Inc. System and method for the production of hot briquetted iron (HBI) containing flux and/or carbonaceous material at a direct reduction plant
AU2022298625B2 (en) * 2021-06-22 2025-05-08 Midrex Technologies, Inc. System and method for production of hot briquetted iron (hbi) containing flux and/or carbonaceous material
WO2024164076A1 (fr) * 2023-02-08 2024-08-15 Hatch Ltd. Système et procédé d'alimentation d'un four électrique

Also Published As

Publication number Publication date
RU2006114771A (ru) 2007-11-10
BRPI0414951A (pt) 2006-11-07
EP1670958A2 (fr) 2006-06-21
AU2004276579A1 (en) 2005-04-07
WO2005031009A3 (fr) 2006-04-13
WO2005031009A2 (fr) 2005-04-07

Similar Documents

Publication Publication Date Title
US4153426A (en) Synthetic gas production
US4238226A (en) Method for producing molten iron by submerged combustion
EP2440677B1 (fr) Procédé de production de fer, fonte aciérée et gaz réducteurs
US4045214A (en) Method for producing steel
US4270740A (en) Apparatus for producing molten iron by submerged combustion
AU2011309835B2 (en) Method and apparatus for producing direct reduced iron utilizing a source of reducing gas comprising hydrogen and carbon monoxide
US4380469A (en) Process and apparatus for continuously reducing and melting metal oxides and/or pre-reduced metallic materials
US5613997A (en) Metallurgical process
WO2009037587A2 (fr) Procédé et appareil pour la réduction directe des minerais de fer au moyen d'un gaz issu d'un four de fusion-gazéificateur
JPS6247473B2 (fr)
AU2008235542B2 (en) Method and device for preparing a reducing agent for use in a metal making process, metal making process and metal making apparatus using said device
CN101448962B (zh) 通过注入含烃气体制造铁水的方法和使用该方法制造铁水的设备
US4248626A (en) Method for producing molten iron from iron oxide with coal and oxygen
EP0094707B1 (fr) Procédé et dispositif d'obtention de fer liquide
RU2689342C1 (ru) Способ получения жидкого чугуна
US20050151307A1 (en) Method and apparatus for producing molten iron
US5558696A (en) Method of direct steel making from liquid iron
MXPA97007698A (en) Procedure to make arra
CN1894426A (zh) 生产铁水的方法和装置
US4286775A (en) Apparatus for producing molten iron from iron oxide with coal and oxygen
MXPA06003507A (es) Metodo y aparato para producir hierro liquido
AU708255B2 (en) Direct iron and steelmaking
JPS58171515A (ja) 銑鉄の製造方法及び装置
KR20070068214A (ko) 탄화수소 함유가스 취입에 의한 용철제조방법 및 이를이용한 용철제조장치
JPS58171510A (ja) 銑鉄製造方法およびその装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: HYLSA S.A. DE C.V., MEXICO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:VIRAMONTES-BROWN, RICARDO;VILLARREAL-TREVINO, JUAN ANTONIO;LOPEZ-GOMEZ, RONALD VICTOR MANUEL;REEL/FRAME:015802/0224

Effective date: 20050126

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION