US20160168652A1 - Desulfurization of gases in the production of pig iron - Google Patents

Desulfurization of gases in the production of pig iron Download PDF

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Publication number
US20160168652A1
US20160168652A1 US14/902,756 US201414902756A US2016168652A1 US 20160168652 A1 US20160168652 A1 US 20160168652A1 US 201414902756 A US201414902756 A US 201414902756A US 2016168652 A1 US2016168652 A1 US 2016168652A1
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Prior art keywords
gas
sulfur
reducing
oxygen
coke
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Abandoned
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US14/902,756
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English (en)
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Robert Millner
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Primetals Technologies Austria GmbH
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Primetals Technologies Austria GmbH
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Publication of US20160168652A1 publication Critical patent/US20160168652A1/en
Abandoned legal-status Critical Current

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    • 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
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • 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
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/007—Conditions of the cokes or characterised by the cokes used
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/002—Evacuating and treating of exhaust gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres
    • 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
    • C21B2100/26—Increasing the gas reduction potential of recycled exhaust gases by adding additional fuel in recirculation pipes
    • 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
    • C21B2100/42—Sulphur removal
    • 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 invention relates to a process for producing liquid pig iron, said process comprising reducing iron oxide-containing charge materials to give a part-reduced first iron product in a first reduction unit by means of a reducing gas and drawing off the reducing gas used in the reduction as export gas, removing CO 2 from the export gas and introducing the export gas into at least one second reduction unit for producing a part-reduced second iron product, introducing the part-reduced first iron product, an oxygen-containing gas, and carbon carriers into a melter gasifier, gasifying the carbon carriers with the oxygen-containing gas and melting the part-reduced first iron product to give the liquid pig iron with formation of the reducing gas in the melter gasifier, and introducing at least a portion of the reducing gas into the first reduction unit by means of a reduction-gas line.
  • gases are produced, an example being coker gas from a coking plant, that comprise not only a high fraction of hydrogen (H 2 ) and carbon monoxide (CO) but also hydrogen sulfide (H 2 S) and methane (CH 4 ).
  • the coke-oven gas is often used to support the calorific value of blast-furnace top gas before it is utilized in blast heaters.
  • Other known ways of utilizing the coke-oven gas are its deployment as fuel gas in slab reheater furnaces or roller hearth furnaces, its deployment in power stations for generating electricity, its blowing in via the air-blast tuyeres of blast furnaces for lowering the consumption of reducing agent.
  • the coke-oven gas is often used together with a further gas as the reducing gas in direct reduction units. In the direct reduction unit, iron oxide-containing charge materials are reduced to give directly reduced iron (DRI) irons, such as sponge iron, for example.
  • DRI directly reduced iron
  • the coke-oven gas before being used for producing DRI, the coke-oven gas is subjected, by means of methods known from the prior art, for example, to desulfurization and/or to treatment in what is called a thermal reactor system to convert the methane contained in the coke-oven gas into carbon monoxide (CO) and hydrogen. Achieving this, however, necessitates inconvenient and costly techniques and units.
  • the problem addressed by the present invention is that of providing a process and apparatus for desulfurizing gases in the production of liquid pig iron.
  • a process for producing liquid pig iron comprising: reducing iron oxide-containing charge materials to give a part-reduced first iron product in a first reduction unit by means of a reducing gas and drawing off the reducing gas spent in the reduction as export gas, removing CO 2 from the export gas and introducing the export gas into at least one second reduction unit for producing a part-reduced second iron product, introducing the part-reduced first iron product, an oxygen-containing gas, and carbon carriers into a melter gasifier, gasifying the carbon carriers with the oxygen-containing gas and melting the part-reduced first iron product to give the liquid pig iron with formation of the reducing gas in the melter gasifier, and introducing at least a portion of the reducing gas into the first reduction unit by means of a reducing-gas line, the process further comprising:
  • sulfur-containing gas refers in the context of this specification to
  • the iron oxide-containing charge materials are reduced to give the first part-reduced iron product.
  • the first reduction unit may be designed, for example, as a prior-art COREX® reduction shaft or as a fluidized bed reactor of a FINEX® reduction cascade.
  • iron oxide-containing charging materials are meant iron ore products.
  • the reducing gas spent in the reduction is drawn off as export gas from the first reduction unit.
  • This export gas is also customarily referred to by the expression “top gas”. In the present specification, however, the export gas is introduced or exported into a second reduction unit, separate from the first reduction unit, optionally as a mixture of further gases.
  • the second reduction unit is designed preferably as a direct reduction shaft.
  • Examples of known direct reduction shafts are MIDREX® high-pressure shafts or MIDREX® low-pressure shafts.
  • the second reduction unit may be designed as a fluidized bed reactor of a reduction cascade. In the second reduction unit, further iron oxide-containing charge materials are reduced to give the second part-reduced iron product, more particularly to give direct reduced iron (DRI) or sponge iron.
  • DRI direct reduced iron
  • sponge iron is subsequently processed further to liquid steel in an electric arc furnace (EAF) or in a basic oxygen furnace (BOF).
  • EAF electric arc furnace
  • BOF basic oxygen furnace
  • the part-reduced first iron product produced in the first reduction assembly is smelted to give liquid pig iron.
  • the gasifying of the carbon carriers by the oxygen-containing gas produces the reducing gas, which is introduced by means of the reducing-gas line into the first reduction unit.
  • the sulfur-containing gas is jetted into the melter gasifier by means of the oxygen nozzles together with the oxygen-containing gas and optionally together with the fine coal.
  • the sulfur-containing gas is produced, for example, during the production of coke in a coking plant or during the gasifying of coal with oxygen. More particularly, sulfur-containing gas refers to coke-oven gas from a coking plant.
  • gases in addition to a high fraction of hydrogen (H 2 ) and carbon monoxide (CO), also contain sulfur (S) and methane (CH 4 ).
  • a typical composition of coke-oven gas is as follows:
  • PCI Pulverized Coal Injection
  • the reducing gas formed in the melter gasifier also includes a nitrogen fraction, which is of no effect in the reduction of the iron oxide-containing charging materials.
  • the nitrogen fraction is abated or substituted by the sulfur-containing gas, with the advantage of a more efficient reduction procedure both in the first and in the second reduction unit.
  • the sulfur-containing gas is sulfur-containing natural gas
  • the CH 4 present in the sulfur-containing natural gas is reacted, together with the oxygen contained in the oxygen-containing gas, to form CO and H 2 , in addition to the substitution of the nitrogen fraction. Both CO and H 2 contribute to raising the efficiency of the reduction procedure.
  • the sulfur-containing gas is jetted by means of dust burners into the melter gasifier together with the dust and the oxygen-containing gas, preferably with oxygen of technical purity.
  • the dust originates, for example, from dry dedusting installations in the first reduction unit.
  • the sulfur-containing gas may also be jetted together with the oxygen-containing gas by means of oxygen burners into the melter gasifier, or introduced directly into the reducing gas line.
  • a dedusting installation Located preferably in the reducing-gas line is a dedusting installation, more particularly a hot-gas cyclone, in which the reducing gas originating from the melter gasifier is dedusted before being introduced into the first reduction unit. Since the temperature of the sulfur-containing gas is below the temperature of the reducing gas drawn off from the melter gasifier, the introduction of the sulfur-containing gas into the reducing-gas line ahead of the dedusting installation—as viewed in the flow direction of the reducing gas—accomplishes cooling of the reducing gas.
  • the sulfur-containing gas acts additionally as a cooling gas to set the optimum reduction temperature in the first reduction unit, and at the same time allows the amount of cooling gas needed to be reduced.
  • the sulfur-containing gas is optionally preheated in a preheating installation, more particularly in a heat exchanger.
  • the preheating installation for example, the sensible heat of a smelting-works gas is utilized.
  • the DRI in the second reduction unit as well is not adversely effected in terms of its sulfur content as a result of the sulfur-containing gas being introduced into the first reduction unit or into the melter gasifier, because the export gas which is introduced into the second reduction unit enters the unit in an already desulfurized form. Prior to or during the further processing of the DRI into liquid steel, therefore, there is no need for additional desulfurization procedures.
  • the coke-oven gas comprises not only sulfur but also CH 4 (methane), C 2 H 4 (ethane), C 6 H 6 (benzene), C 7 H 8 (toluene), and C 10 H 8 (naphthalene), which in some cases are toxic and are all unwanted in the process of the invention.
  • these hydrocarbons present in the coke-oven gas are converted at least partly, as a result of the high temperatures prevailing therein and as a result of the oxygen present therein, into CO (carbon monoxide), CO 2 (carbon dioxide), H 2 O (water), and C (carbon).
  • the hydrocarbons present in the coke-oven gas are converted into elements and compounds that are comparatively undetrimental for the process of the invention, and compounds and elements that are comparatively unproblematic for the environment.
  • sulfur-containing gas can be used in the production of liquid pig iron or DRI, with a simultaneous boost in productivity, without burdening the environment or adversely affecting the quality of the liquid pig iron or of the DRI.
  • the first reduction unit comprises at least a first and a second fluidized bed reactor, in that the fluidized bed reactors are connected by means of connecting lines for introducing the reducing gas into the fluidized bed reactors and for drawing off the reducing gas from the fluidized bed reactors, in that the reducing gas after flowing through the two fluidized bed reactors is drawn off as export gas, and in the process further comprises: jetting or introducing the sulfur-containing coke-oven gas, the sulfur-containing natural gas, or the mixture of the sulfur-containing natural gas and the coke-oven gas
  • This embodiment typically involves fluidized bed reactors of a FINEX®—reduction cascade, which is well known from the prior art.
  • the individual fluidized bed reactors are connected by means of the connecting lines, with the reducing gas being passed initially into the first fluidized bed reactor.
  • the reducing gas is drawn off from this reactor by means of the connecting line and is passed into the other fluidized bed reactor for reduction of the iron oxide-containing charge materials located therein.
  • this operation takes place, correspondingly, more often.
  • the spent reducing gas is drawn off from this reactor as export gas.
  • the jetting of the sulfur-containing gas together with the oxygen-containing gas takes place into at least one of the connecting lines by means of oxygen burners, and/or the introducing of the sulfur-containing gas takes place directly into at least one of the connecting lines.
  • Direct in this context refers to the unmediated introduction of the sulfur-containing gas into the connecting lines. This means that the sulfur-containing gas is introduced into the connecting line without prior combustion in the oxygen burner.
  • Coke-oven gas typically contains between 60 and 65 volume percent hydrogen (H 2 ) and between 6 and 6.5 volume percent carbon monoxide (CO). This means that there is reduction potential—meaning the capacity for reduction of iron-oxides to iron—in the coke-oven gas.
  • reduction potential meaning the capacity for reduction of iron-oxides to iron—in the coke-oven gas.
  • a further subject of the present invention is apparatus for implementing the process of the invention, said apparatus comprising: a first reduction unit having an export-gas line and a supply line for supplying iron oxide-containing charge materials, a melter gasifier which is connected via a reducing-gas line to the first reduction unit, at least one second reduction unit which is connected by the export-gas line to the first reduction unit, a CO 2 removal unit disposed in the export-gas line and intended for removing CO 2 , at least one iron product supply line, which opens into the melter gasifier, and a carbon carrier supply line, one or more introduction elements which open into the melter gasifier and have an oxygen nozzle or a dust burner or an oxygen burner design, having in each case a media supply line for introducing a gas and/or a solid into the melter gasifier, wherein at least one process-gas line for supplying a sulfur-containing coke-oven gas, a sulfur-containing natural gas, or a mixture of the sulfur-containing natural gas and the coke-oven gas, said line opens
  • a melter gasifier in contrast to a blast furnace, is characterized in that it is operated predominantly with reducing agents in piece form, such as lump coal or coal briquettes, for example, with iron carriers that have undergone at least preliminary reduction, and with oxygen of technical purity: oxygen fraction greater than 90 volume percent.
  • reducing agents in piece form, such as lump coal or coal briquettes, for example, with iron carriers that have undergone at least preliminary reduction, and with oxygen of technical purity: oxygen fraction greater than 90 volume percent.
  • a melter gasifier has a dome with a calming space.
  • the first reduction unit is connected via the reducing-gas line to the melter gasifier.
  • the first reduction unit may be designed, for example, as a COREX® reduction shaft known from prior art or as a fluidized bed reactor of a FINEX® reduction cascade.
  • iron oxide-containing charge materials are meant iron ore products.
  • the reducing gas spent in the reduction of the iron oxide-containing charge materials in the first reduction unit is drawn off from the first reduction unit as export gas by means of the export-gas line.
  • the export-gas line opens into the second reduction unit, which is different from the first reduction unit.
  • the second reduction unit is designed preferably as a direct reduction shaft. Examples of known direct reduction shafts are MIDREX® high-pressure shafts or MIDREX® low-pressure shafts.
  • the second reduction unit may also be designed as a fluidized bed reactor of a reduction cascade.
  • the DRI is produced.
  • the CO 2 removal unit preferably a pressure swing absorption unit (PSA unit) or a vacuum pressure swing adsorption unit (VPSA unit), for the removal of CO 2 from the export gas.
  • PSA unit pressure swing absorption unit
  • VPSA unit vacuum pressure swing adsorption unit
  • the melter gasifier has at least one iron product supply line, which opens into the melter gasifier, and a carbon carrier supply line. Via the iron product supply line, the first part-reduced iron product is introduced from the first reduction plant into the melter gasifier.
  • the carbon carriers Via the carbon carrier supply line, the carbon carriers, preferably lumps of coal or coal briquettes, are introduced into the melter gasifier.
  • the media supply lines which open into the introduction elements of the melter gasifier, the gases or the solids are introduced into the melter gasifier. More particularly the oxygen-containing gas and the dust are introduced into the melter gasifier by means of the media supply lines.
  • the liquid pig iron is produced in the melter gasifier.
  • the process-gas lines for supplying the sulfur-containing gas open, in accordance with the invention, in at least one of the media supply lines and/or in at least one of the introduction elements.
  • the introduction elements are designed as oxygen nozzles or as dust burners or as oxygen burners.
  • one or more process-gas lines may also open into the reducing-gas line.
  • Located optionally in the reducing-gas line are dedusting installations for dedusting the reducing gas. As viewed in the direction of flow of the reducing gas, the process-gas lines may open into the reducing-gas line ahead of and/or downstream of the dedusting installation.
  • sulfur-containing gas can be used in the production of liquid pig iron or DRI, with a simultaneous boost in productivity, without burdening the environment or adversely affecting the quality of the liquid pig iron or of the DRI.
  • the first reduction unit comprises at least a first and a second fluidized bed reactor, the fluidized bed reactors being connected by means of connecting lines for introducing the reducing gas into the fluidized bed reactors and drawing off the reducing gas from the fluidized bed reactors, one or more introduction elements which open into at least one of the connecting lines and are designed as oxygen nozzles, having in each case a media supply line for introducing a gas into the connecting line, are present, and there is at least one process gas line for supplying the sulfur-containing coke-oven gas, the sulfur-containing natural gas, or the mixture of the sulfur-containing natural gas and the coke-oven gas, said line opening
  • the process-gas line comes from a plant which produces the sulfur-containing coke-oven gas, the sulfur-containing natural gas, or the mixture of the sulfur-containing natural gas and the coke-oven gas, more particularly from a plant for producing coke and/or a coal gasification plant and/or from another source of the sulfur-containing natural gas.
  • sulfur-containing natural gas or a mixture of the sulfur-containing natural gas and the coke-oven gas, can also be utilized and simultaneously desulfurized during the production of liquid pig iron.
  • FIG. 1 are a process of the invention and apparatus of the invention for producing liquid pig iron 1 , with utilization and desulfurization of coke-oven gas.
  • FIG. 1 shows a process of the invention and apparatus of the invention for producing liquid pig iron 1 , with utilization and desulfurization of coke-oven gas, in the version of a COREX® integrated direct reduction plant.
  • a first reduction plant 4 a COREX® reduction shaft with fixed bed, is supplied with the iron oxide-containing charge materials 2 via a supply line 20 for the supply of iron oxide-containing charge materials 2 . These materials are reduced by means of a reducing gas 5 to give a part-reduced iron product 3 , which is subsequently introduced into a melter gasifier 11 via a plurality of iron product supply lines 22 which open into the melter gasifier 11 . Introduced additionally into the melter gasifier 11 are carbon carriers 10 in the form of lumps of coal, via a carbon carrier supply line 23 , and oxygen-containing gas 9 via media supply lines 24 . The carbon carriers 10 introduced into the melter gasifier 11 are gasified by means of the oxygen-containing gas 9 with formation of the reducing gas 5 .
  • the reducing gas 5 is introduced via the reducing-gas line 12 into the first reduction unit 4 .
  • the first iron product 3 introduced into the melter gasifier 11 , is melted by the heat produced in the gasification of the carbon carriers 10 , to form the liquid pig iron 1 .
  • the reducing gas 5 spent in the reduction of the iron oxide-containing charge materials 2 is drawn off from the first reduction unit 4 as export gas 6 via an export-gas line 19 and compressed, after which CO 2 removal takes place in a CO 2 removal installation 21 disposed in the export-gas line 19 .
  • the export gas 6 is subsequently introduced into a second reduction unit 7 for production of a part-reduced second iron product 8 , more particularly direct reduced iron (DRI).
  • DRI direct reduced iron
  • the melter gasifier 11 possesses three introduction elements, which open into the melter gasifier 11 and which have an oxygen nozzle 15 , a dust burner 17 , and an oxygen burner 18 design. On the outside, relative to the melter gasifier 11 , the introduction elements are connected to the media supply lines 24 . There are five process-gas lines 25 , with two of the process-gas lines 25 opening into the reducing-gas line 12 , and one in each case opening into the oxygen nozzle 15 , into the dust burner 17 , and into the oxygen burner 18 . Via the process-gas lines 25 , the melter gasifier 11 is supplied with sulfur-containing gas 13 , in this specific case with coke-oven gas having a typical composition of
  • the coke-oven gas is supplied by jetting of the coke-oven gas into the melter gasifier 11 ; in the first case, the coke-oven gas is jetted into the melter gasifier together with the oxygen-containing gas 9 and fine coal 14 by means of the oxygen nozzle 15 , in the second case together with dust 16 and the oxygen-containing gas 9 by means of the dust burner 17 , and in the third case together with the oxygen-containing gas 9 by means of the oxygen burner 18 . In the fourth case the sulfur-containing gas 13 , or the coke-oven gas, is introduced directly into the reducing-gas line 12 by means of the process-gas lines 25 .
  • the process-gas lines 25 come from a plant—more particularly a coking plant—that produces the sulfur-containing gas 13 .
  • the invention relates to a process for producing liquid pig iron 1 , wherein iron oxide-containing charge materials 2 are reduced in a first reduction unit 4 by means of a reducing gas 5 to give a part-reduced first iron product 3 which is melted in a melter gasifier 11 to give the liquid pig iron 1 , the spent reducing gas 5 being introduced as export gas 6 into a second reduction unit 7 , and a sulfur-containing gas 13 being introduced into the melter gasifier 11 and/or into the reducing-gas line 12 together with an oxygen-containing gas 9 and/or together with dust 16 .
  • the invention further relates to apparatus for implementing the process.
  • sulfur-containing gas 13 can be used in the production of liquid pig iron 1 , or DRI, with an accompanying boost in productivity, without burdening the environment or adversely affecting the quality of the liquid pig iron 1 or of the DRI.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Industrial Gases (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
US14/902,756 2013-07-01 2014-02-06 Desulfurization of gases in the production of pig iron Abandoned US20160168652A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13174447.6A EP2821509A1 (de) 2013-07-01 2013-07-01 Entschwefelung von Gasen bei der Herstellung von Roheisen
EP13174447.6 2013-07-01
PCT/EP2014/052280 WO2015000604A1 (de) 2013-07-01 2014-02-06 Entschwefelung von gasen bei der herstellung von roheisen

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US (1) US20160168652A1 (de)
EP (1) EP2821509A1 (de)
JP (1) JP2016526606A (de)
KR (1) KR20160025621A (de)
CN (1) CN105579593B (de)
AU (1) AU2014286586A1 (de)
BR (1) BR112015032879A2 (de)
CA (1) CA2917074A1 (de)
RU (1) RU2016102894A (de)
WO (1) WO2015000604A1 (de)

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KR102083539B1 (ko) * 2017-08-23 2020-04-23 주식회사 포스코 용선 제조 설비 및 용선 제조 방법
CN110806113B (zh) * 2019-11-25 2020-08-25 北京科技大学 一种向矿热炉中通入气体降低能耗的方法与装置
CN115921498A (zh) * 2022-10-18 2023-04-07 新疆八一钢铁股份有限公司 一种欧冶炉无害化处理危废脱硫剂的方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3868899A4 (de) * 2018-10-17 2021-11-17 Posco Vorrichtung zur herstellung von eisenschmelze vom kohlendioxidemissionsreduktionstyp und verfahren zu ihrer herstellung davon
EP4350010A1 (de) * 2022-10-05 2024-04-10 Primetals Technologies Austria GmbH Eisenschmelze aus sinter
WO2024074375A1 (de) * 2022-10-05 2024-04-11 Primetals Technologies Austria GmbH Eisenschmelze aus sinter

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AU2014286586A1 (en) 2016-01-21
KR20160025621A (ko) 2016-03-08
BR112015032879A2 (pt) 2017-07-25
RU2016102894A (ru) 2017-08-03
EP2821509A1 (de) 2015-01-07
CN105579593A (zh) 2016-05-11
JP2016526606A (ja) 2016-09-05
CN105579593B (zh) 2017-09-01
WO2015000604A1 (de) 2015-01-08

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