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US20100126311A1 - Direct processing of metallic ore concentrates into ferroalloys - Google Patents

Direct processing of metallic ore concentrates into ferroalloys Download PDF

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Publication number
US20100126311A1
US20100126311A1 US12/452,850 US45285008A US2010126311A1 US 20100126311 A1 US20100126311 A1 US 20100126311A1 US 45285008 A US45285008 A US 45285008A US 2010126311 A1 US2010126311 A1 US 2010126311A1
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US
United States
Prior art keywords
iron
process according
melting furnace
ore concentrates
mixture
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
US12/452,850
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English (en)
Inventor
Glenn E. Hoffman
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.)
Cardero Resource Corp
Original Assignee
Cardero Resource Corp
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 Cardero Resource Corp filed Critical Cardero Resource Corp
Priority to US12/452,850 priority Critical patent/US20100126311A1/en
Assigned to CARDERO RESOURCE CORPORATION reassignment CARDERO RESOURCE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HOFFMAN, GLENN E.
Publication of US20100126311A1 publication Critical patent/US20100126311A1/en
Abandoned legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C21B11/10—Making pig-iron other than in blast furnaces in electric 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/12—Making spongy iron or liquid steel, by direct processes in electric furnaces
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B13/00—Obtaining lead
    • C22B13/02—Obtaining lead by dry processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/04—Obtaining zinc by distilling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/04—Obtaining zinc by distilling
    • C22B19/10—Obtaining zinc by distilling in reverberatory furnaces
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/04—Obtaining zinc by distilling
    • C22B19/16—Distilling vessels
    • C22B19/18—Condensers, Receiving vessels
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00—Obtaining refractory metals
    • C22B34/10—Obtaining titanium, zirconium or hafnium
    • C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/16—Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced
    • 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
    • C21B2100/62—Energy conversion other than by heat exchange, e.g. by use of exhaust gas in energy production
    • 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
    • C21B2100/66—Heat exchange
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • C21C2007/0062—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires with introduction of alloying or treating agents under a compacted form different from a wire, e.g. briquette, pellet
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/527—Charging of the electric furnace
    • 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
    • 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
    • Y02P10/20—Recycling

Definitions

  • the present invention relates to a method and apparatus for direct processing of manganese, chromite and silica bearing compounds (Mn—Fe and Cr—Fe ores, and silica) to produce a liquid ferroalloy and iron, employing the concept of combined cycle power generation using a gas combustion turbine.
  • manganese, chromite and silica bearing compounds Mn—Fe and Cr—Fe ores, and silica
  • Mn—Fe ores, Cr—Fe ores, and silica are cold briquetted to form compact agglomerates containing a carbonaceous material such as coal, petcoke, char, etc., iron oxide (either already contained in the ore or added separately as iron ore fines, mill scale, metalized iron fines, etc., to the mix), fluxes such as lime, silica, spar, etc., and binder.
  • a carbonaceous material such as coal, petcoke, char, etc.
  • iron oxide either already contained in the ore or added separately as iron ore fines, mill scale, metalized iron fines, etc., to the mix
  • fluxes such as lime, silica, spar, etc., and binder.
  • An excess amount of carbon is present in the agglomerate not only to react with the manganese, chromium, and silica compounds, but also to reduce the iron oxide, manganese oxide, etc., so that the atmosphere within the melter is predominantly CO with some liberated H 2 from the volatilization of the carbonaceous material such as coal. Sulfur in the system is free to combine with the flux additions (CaO, CaF 2 , MgO, etc.), to form a sulfur-containing liquid slag.
  • the principal object of the present invention is to provide a method of producing silicamanganese, ferromanganese or ferrosilicon ferroalloy from ordinary ore materials.
  • Another object of the invention is to provide a method of recovering manganese, chromium, vanadium, and titanium as oxides from ores.
  • FIG. 1 is a schematic flowsheet of the process, wherein the reference numerals refer to the items as indicated below.
  • FIG. 2 is a schematic flowsheet for handling of off-gases.
  • FIG. 3 is a schematic flowsheet for treating hot metal to form vanadium and titanium oxides.
  • FIG. 4 is a schematic depiction of recovering hot metal in pig form.
  • FIG. 5 is a schematic depiction of slag treatment to recover vanadium and titanium oxides or to recover concentrated slag for recycle.
  • FIG. 6 is a schematic flowsheet showing an alternative method for producing a liquid ferroalloy in which the feed materials are preheated with or without agglomeration, and then fed to the melting furnace.
  • feed materials are introduced to mixer 22 , the input materials consisting of: metallic iron fines, iron oxides, manganese-iron ore concentrates and/or chromium-iron ore concentrates 10 , 100% passing 10 mesh Tyler Standard (1.70 mm), preferably 100% passing 100 mesh Tyler Standard (150 microns); prepared reductant 14 , such as coal, petroleum coke, char, or other carbonaceous material, 100% passing 25 mm, preferably 100% passing 100 mesh Tyler Standard (150 microns); slag formers or fluxing agents 16 , such as MgO, CaO, Al 2 O 3 , CaF 2 (fluorspar) and SiO 2 , 100% of which are minus 25 mm; an organic or inorganic binder 18 , such as cellulose, bentonite, molasses, or starch; recycled fines 20 , and water 26 as needed.
  • metallic iron fines, iron oxides, manganese-iron ore concentrates and/or chromium-iron ore concentrates 10 100% passing 10 mesh Tyler Standard
  • briquetter/agglomerator 24 or in pelletizer 28 (such as a drum or disc type pelletizer), the agglomerates being in the form of uniformly sized briquettes or pellets.
  • pelletizer 28 such as a drum or disc type pelletizer
  • the agglomerates are screened by sizer 30 , the undersized material being returned to the agglomerator 24 or to the pelletizer 28 .
  • material D 1 exiting mixer 22 can be fed to a heater 84 for the purpose of preheating the mixture to about 500 to 120° C., devolatizing the reductant, and producing a preheated charge to electric furnace melter 38 . Pre-reduction of the iron oxide will occur to levels ranging from about 0 to 90%.
  • Agglomerated material D 2 can also be preheated, if desired, prior to feeding the material to the melter through the pressure seal 37 .
  • the heater 84 can be an indirectly heated rotary kiln, or a direct fired kiln, as shown, with off-gases being recycled.
  • the heater 84 can be refractory lined, or it can be unlined, as desired.
  • Screened pellets from pelletizer 28 are dried in a greenball dryer 32 to 1% or less moisture content.
  • the agglomerates are cured and/or stored in hoppers 34 , then fed into an electric melter, or melting furnace 38 through a pressure-sealed feed system 36 .
  • Feed to the melter is through a pressure-sealed chamber 80 , a conventional feed leg as is used with a shaft furnace, or through lock valves.
  • the melter off-gas is treated, cooled and scrubbed in cooler-scrubber 52 , compressed in compressor 54 and delivered to stack 56 which includes combustion means for converting carbon monoxide and hydrogen to carbon dioxide and water vapor.
  • the melter 38 operates normally under a slight positive pressure. Tapping of the hot metal and slag is done on an intermittent basis.
  • one or more additional feed materials may be introduced through a pressure seal to the melter 38 , including metallic iron fines and iron oxide fines 12 , 100% of which are minus 25 mm; prepared reductant 14 , such as coal, petroleum coke, char, or other carbonaceous material, 100% passing 25 mm, preferably 50% passing 10 mesh; slag formers or fluxing agents 16 , such as MgO, CaO, Al 2 O 3 , CaF 2 (fluorspar) and SiO 2 , 100% of which are minus 25 mm; and recycled slag 50 .
  • the feed materials are melted in the melting furnace 38 at a temperature of from 1500 to 1760 C to form a liquid ferroalloy with a slag thereon;
  • Liquid ferroalloy is removed from the melter into ladles 40 and may be cast into ferroalloy pigs at pig caster 44 , as shown. Additional fluxing agents 14 may be added to the hot ferroalloy as it is discharged into ladles 40 (A and B).
  • a desulfurizing slag addition 42 is introduced into a hot metal ladle shown as B, the addition being CaO, MgO, Ca/Mg wire, or a mixture thereof.
  • the hot metal from either ladle A or B can be cast into pigs.
  • the slag from ladle C may contain unreduced oxidized species of Mn, Cr, V and Ti due to partitioning effects between the liquid ferroalloy and slag.
  • the slag can then be treated as shown in FIG. 5 by a quenching and grinding and electrostatic separation 82 to recover MnO, Cr 2 O 5 , V 2 O 5 and TiO 2 .
  • This concentrated slag 50 may then be recycled to the melter, if desired, in order to increase the desired material concentration of slag, and improve the efficiency of recovery.
  • Recovery of oxidized species, MnO, Cr 2 O 5 , V 2 O 5 and TiO 2 , from the concentrated slag can also be obtained by solvent extraction techniques.
  • Off-gas exiting the melting furnace 36 is cleaned in cooler-scrubber 52 .
  • the off-gas may be moved by fan 54 through high pressure compressor 58 , which operates in the range of about 100 to 350 psig, and the cleaned, compressed off-gas is used as combustion fuel in gas turbine 64 , or used for preheating agglomerates in hopper/preheaters 34 prior to their introduction to the electric melting furnace 36 .
  • Gas turbine 64 drives generator 66 to produce electricity, and sensible heat contained in offgas exiting the gas turbine is recovered in a waste heat recovery boiler system 68 .
  • the waste heat boiler system 68 steam cycle could be a “Kalina” cycle based on using 70% ammonia and 30% water for better range processing and heat recovery efficiency at lower gas temperatures.
  • Ammonia/water boiling occurs over a range of temperatures rather that at a specific temperature and pressure.
  • Steam produced by the waste heat boiler system 68 is then used to drive a steam turbine 70 and associated generator 72 to produce additional electricity.
  • a secondary objective of the invention is to supplement or produce all the required electricity to accommodate the process and operate the plant so as to be electricity self sufficient. If sufficient fuel gas is not produced by the melter, then additional fuel gas, such as natural gas, can be used to supplement the fuel gas feed to the gas turbine.
  • Gas from the compressor 54 can be treated for sulfur removal in an optional sulfur removal system 60 , which may require an optional chiller 78 upstream of the sulfur gas removal system.
  • the agglomerate curing or storage hoppers 34 can be preheaters, such as a shaft or vessel preheater, as desired.
  • preheaters such as a shaft or vessel preheater, as desired.
  • off-gas from the electric furnace or melter 38 can be utilized as shown in FIG. 1 .
  • the off-gas is returned to the gas handling system at cooler-scrubber 52 .

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US12/452,850 2007-09-04 2008-08-12 Direct processing of metallic ore concentrates into ferroalloys Abandoned US20100126311A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/452,850 US20100126311A1 (en) 2007-09-04 2008-08-12 Direct processing of metallic ore concentrates into ferroalloys

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US96734707P 2007-09-04 2007-09-04
US99761607P 2007-10-04 2007-10-04
US12691508P 2008-05-08 2008-05-08
US12/452,850 US20100126311A1 (en) 2007-09-04 2008-08-12 Direct processing of metallic ore concentrates into ferroalloys
PCT/US2008/010123 WO2009032110A1 (en) 2007-09-04 2008-08-12 Direct processing of metallic ore concentrates into ferroalloys

Publications (1)

Publication Number Publication Date
US20100126311A1 true US20100126311A1 (en) 2010-05-27

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ID=40429178

Family Applications (4)

Application Number Title Priority Date Filing Date
US12/452,850 Abandoned US20100126311A1 (en) 2007-09-04 2008-08-12 Direct processing of metallic ore concentrates into ferroalloys
US12/452,848 Expired - Fee Related US7985389B2 (en) 2007-09-04 2008-08-12 Direct processing of ferrotitania ores and sands
US12/452,849 Expired - Fee Related US8043408B2 (en) 2007-09-04 2008-08-12 Direct smelting of zinc bearing compounds to produce metallic zinc
US13/200,186 Expired - Fee Related US8420007B2 (en) 2007-09-04 2011-09-20 Apparatus for direct smelting of zinc bearing compounds to produce metallic zinc

Family Applications After (3)

Application Number Title Priority Date Filing Date
US12/452,848 Expired - Fee Related US7985389B2 (en) 2007-09-04 2008-08-12 Direct processing of ferrotitania ores and sands
US12/452,849 Expired - Fee Related US8043408B2 (en) 2007-09-04 2008-08-12 Direct smelting of zinc bearing compounds to produce metallic zinc
US13/200,186 Expired - Fee Related US8420007B2 (en) 2007-09-04 2011-09-20 Apparatus for direct smelting of zinc bearing compounds to produce metallic zinc

Country Status (8)

Country Link
US (4) US20100126311A1 (zh)
EP (3) EP2190622A4 (zh)
CN (3) CN101715492B (zh)
AU (3) AU2008295563B2 (zh)
CA (3) CA2694630A1 (zh)
MX (3) MX2010002194A (zh)
WO (3) WO2009032111A1 (zh)
ZA (3) ZA201004006B (zh)

Cited By (1)

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US20130081516A1 (en) * 2011-10-04 2013-04-04 John J. Simmons Direct Production of Iron Slabs and Nuggets From Ore Without Pelletizing or Briquetting

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AT506640B1 (de) * 2008-03-17 2010-07-15 Siemens Vai Metals Tech Gmbh Verfahren und vorrichtung zur herstellung von flüssigem roheisen oder flüssigen stahlvorprodukten
AU2009278748A1 (en) * 2008-08-07 2010-02-11 Zinchem, A Division Of Zimco Group (Pty) Ltd Method and plant for the production of zinc dust
KR101619169B1 (ko) * 2008-08-30 2016-05-18 타타 스틸 리미티드 고농도의 아연을 갖는 철광석들로부터 유가 철의 추출 및 아연의 분리 방법
JP5571345B2 (ja) * 2009-09-29 2014-08-13 株式会社神戸製鋼所 ブリケットの製造方法、還元金属の製造方法、及び亜鉛若しくは鉛の分離方法
PL2572005T3 (pl) * 2010-05-18 2021-06-14 Tata Steel Limited Sposób bezpośredniego wytapiania
US20140306386A1 (en) * 2011-12-05 2014-10-16 Active Land International Corporation Sustainable process for the co-generation of pig iron and electric energy using wood as fuel
KR101318962B1 (ko) * 2012-04-26 2013-10-15 주식회사 포스코 사철을 이용한 직접환원철 제조장치 및 그 제조방법
CA2853223C (en) * 2012-08-22 2018-03-06 Hoffman & Sons Technologies, Llc Producing pig iron from iron-containing feed materials
US20150275323A1 (en) * 2012-08-22 2015-10-01 Hoffman & Sons Technologies, Llc Production of pig iron
US20160102382A1 (en) * 2013-04-29 2016-04-14 Saudi Basic Industries Corporation Process for the removal of metal or impurities from electric arc furnace dust
FI126719B (en) * 2013-12-17 2017-04-28 Outotec Finland Oy Process for the preparation of a manganese-containing iron alloy
CN103706958B (zh) * 2013-12-26 2016-05-25 中国铝业股份有限公司 铝钢界面还原剂
CN106222444A (zh) * 2015-08-25 2016-12-14 赖成章 用高科技冶炼硫化锌矿方法
CN108754178B (zh) * 2018-07-06 2020-06-09 六盘水中联工贸实业有限公司 一种硫化锌精矿的冶炼方法
CN113461467A (zh) * 2021-07-20 2021-10-01 北京理工大学 低机械感度的安全环保开爆药及其制备方法
CN118326161B (zh) * 2024-06-13 2024-08-13 昆明理工大学 一种利用废SCR催化剂和晶硅废料制备Si-Ti合金焊料并同时回收钨和钒的方法

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