CN102686758A - Method for melting high-carbon ferrochrome - Google Patents

Method for melting high-carbon ferrochrome Download PDF

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Publication number
CN102686758A
CN102686758A CN2011800045280A CN201180004528A CN102686758A CN 102686758 A CN102686758 A CN 102686758A CN 2011800045280 A CN2011800045280 A CN 2011800045280A CN 201180004528 A CN201180004528 A CN 201180004528A CN 102686758 A CN102686758 A CN 102686758A
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Prior art keywords
ore
chrome
slag
carbon
quartzite
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CN2011800045280A
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CN102686758B (en
Inventor
朱姆巴克汉·朱姆巴克哈诺维奇·伊兹别姆别托夫
法兹尔·卡尤莫维奇·沙迪耶夫
马纳特·扎克辛别尔格诺维奇·托利姆贝科夫
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Fazil Kayumovic Shadyev
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Fazil Kayumovic Shadyev
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • 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
    • C21C5/5264—Manufacture of alloyed steels including ferro-alloys
    • 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
    • C21C5/56—Manufacture of steel by other methods
    • 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
    • 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
    • C22B34/30—Obtaining chromium, molybdenum or tungsten
    • C22B34/32—Obtaining chromium
    • 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
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0025—Adding carbon material
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

The invention relates to the production of ferroalloys, and specifically to methods for producing high-carbon ferrochrome in an ore-reducing electric furnace. The problem to be solved is the involvement in the production process of materials which are unconditioned in size - chrome ore of less than 10 mm and a carbon-containing reducing agent with piece dimensions of less than 5 mm. To solve this problem, an unconditioned batch of chrome ore (particle size of 0-10 mm) is mixed with carbon reducing agent (particles of less than 5 mm) in a ratio of 1-(0.3-0.5). The mixture is moistened and briquettes are pressed out of said mixture at a pressure of 25-50 MPa. The briquettes are loaded into the electric furnace together with quartzite in a ratio of 93.7-96.2% by mass of the briquettes and 3.8-6.3% by mass of the quartzite. An ore comprising 44-56% r2 and 4-12% SiO2 is used.

Description

The method that is used for the melting high carbon ferro-chrome
Technical field
The present invention relates to iron alloy production, exactly, relate to the method that the high carbon ferro-chrome in the ore smelting electric furnace is produced.
Background technology
The method that the known so far high carbon ferro-chrome in the ore smelting stove is produced, wherein furnace charge is by chrome ore, carbonaceous reducing agent with contain the preparation of silica flux.The level of using the lump of 10-80mm size in this method and surpassing the carbon containing reducer of 5mm is divided.Furnace charge is fed to furnace roof and the metal that is produced and slag with batchwise operation and goes out from fire grate.Metal is being discharged to (Ryss M.A.Production of ferroalloys.-M.:Metallurgy, 1985,199-212 page or leaf) in the mold with the slag after separating from stove.
The characteristic of this method is following:
Chromium reductive speed is low in the high carbon ferro-chrome melting method, and reason is that the silica chrome ore contains 30-35%Cr 2O 3And 10-20%SiO 2Under smelting temperature, silicon oxide forms adhesive film on the surface of chrome ore stone, and it stops the interaction of chromic oxide and carbonaceous reducing agent and gaseous state carbon monoxide.Silica flux has strengthened the effect of the silicon oxide of chrome ore through obstruction ore picotite and carbonaceous reducing agent and contacting of gaseous state CO.Chromium in the infusibility picotite of chrome ore does not form chromium with silicon oxide can be from any liquid phase that wherein is reduced.Because from the chromium reductive passivation reaction of picotite, it is not reduced than the upper strata what stove was bathed.The solid mineral particle is supplied to bottom with sizable amount, and quilt is from the winding of the effusive liquid slag of stove.
Chromium is that from chrome ore reductive mechanism solid coke is at the some place and iron that constitutes this ore and chromic oxide reaction of its contact chrome ore stone.In heat-processed, carbon is diffused in the whole picotite volume, forms gaseous state CO, chromium and iron carbide.Coincidently, the refractory oxide (SiO of porous rock is rich in the zone that contacts with chrome ore of coke 2, MgO, Al 2O 3), be mainly SiO 2Thereby, between coke and picotite, produce so-called slag-metallic barrier, sharply reduce in this barrier place chromium reductive speed.
In the ferrochrome fusion process of ore smelting stove, chromium causes the melting treatment time to increase, be used for the excessive and slag pick-up rate increase of ferrochrome melting specific power consumption from silica chrome ore reductive low rate in being added with the furnace charge that contains silica flux.
The known method that a kind of ferrochrome melting is arranged, the level of the carbon containing reducer that wherein use the chrome ore stone step branch be of a size of 10-80mm, surpasses 5mm are divided and are and contain silica flux as charging component from the slag-metallic scrap form of producing.Furnace charge is melting in electric furnace, produces ferrochrome and slag (Ryss M.A.Production of ferroalloys.-M.:Metallurgy, 1985, the 199-212 pages or leaves).
The characteristic of this method is following:
Because it is to cause by silica flux and by the chromite of the silica discharge of the porous rock that exists in the chrome ore that the low rate chromite that in the ore smelting stove medium high carbon ferrochrome production process of using the furnace charge is made up of chrome ore, carbonaceous reducing agent and flux, takes place-reductive agent reaction causes high-load chromic oxide in the waste residue, the reaction of these low rates.
The use of silica chrome ore causes stove to bathe the formation of the slag barrier on the inherent picotite particle in upper strata.And picotite has higher smelting temperature, and they are celebrated because of the low rate reaction of itself and silica, and Here it is chrome ore heats with silica flux and causes the reason that is difficult to form the liquid phase that chromium can therefrom be reduced.
In the ferrochrome production process in the ore smelting stove from containing 30-33% chromium and 10-20%SiO 2The low rate of silica chrome ore reduction chromium fusion process time of causing being used for the ferrochrome melting increase and specific power consume excessive.This situation is promoted such as following factor: in the process of high carbon ferro-chrome melting, the chrome ore particle becomes impermeable for the CO that is formed in the stove bath bottom.
With the present invention who requires to protect be the method (the RF patent No. 2115627, IPC C01G37/00, C22B 1/00, C 22B 1/16,1998) of high carbon ferro-chrome melting near the process that is equal to.
This method comprises the electric furnace of the slag that the carbon containing reducer level branch that the chrome ore stone, size that are of a size of 10-80mm in the following component ratio of wt% is housed surpasses 5mm, slag-metallic scrap that high carbon ferro-chrome is produced and low carbon ferrochromium are produced:
Carbonaceous reducing agent ?10-15
Slag-metallic scrap ?5-15
The slag of low carbon ferrochromium ?1-10
Chrome ore Surplus
Furnace charge is loaded in the ore smelting electric furnace, and the layer depth of 1.5-2.5m is provided in stove is bathed.Furnace charge is made up of the following component that contains in wt%: 31-33-Cr 2O 315-17-SiO 2The coke that contains 86% carbon, flux: the slag-metallic scrap of high carbon ferro-chrome production contains the 50-SiO in wt% 220-MgO; 10-Al 2O 3The inclusion metallic of 20-high carbon ferro-chrome contains the 40-50CaO in wt%; 25-30SiO 25-15Cr 2O 34-5Al 2O 38-12MgO; The slag of the low carbon ferrochromium of 1-3FeO.Charging component is supplied in the electric furnace hopper.With batchwise operation furnace charge is installed on the furnace roof, mainly slagging tap and after furnace charge is laid on the furnace roof.By melting, form metal and slag with electrically heated furnace charge, the latter is regularly discharged.
The method is characterized in that following: must divide thin level and carry out primary dcreening operation, and only use big charging component piece, this causes considerable thin level to divide accumulation and cause environmental degradation.
And, contain the 30%Cr that has an appointment 2O 3The use of smart chrome ore cause the slag pick-up rate to increase and reduce than furnace capacity.
Summary of the invention
The problem that the present invention solves relates to the off-specification material that uses in process of production by size material: size is divided less than the level of the carbon containing reducer of 5mm less than chrome ore stone and the size of 10mm.
The engineering progress of being realized relates to the off-specification material that uses in process of production by size material: chrome ore and carbon containing reducer, and relate to and improve ecologic regime.
In order to achieve the above object, with 1: ratio mixed size (0.3-0.5) divides the level of (undersized ore) and carbon containing reducer to divide (size is less than 5mm) less than the level of the chrome ore stone of 10mm, and then they is fed in the briquetting press.Produce briquetting with 25-50MPa pressure.Use contains in wt%: 44.0-56.0-Cr 2O 34.0-12.0-SiO 2Undersized chrome ore and the carbon containing reducer that contains 86% solid carbon.
Then, the briquetting of producing is packed in the hopper, and be fed to the electric furnace from hopper.Quartzite is supplied to wherein, so that comparing like lower lock block/quartzite with wt%, to be provided:
Briquetting 93.7-96.2
Quartzite 3.8-6.3
Add up to 100%.
With the briquetting and the quartzitic mixture melting of preparation, thereby produce ferrochrome and slag.
The coexistence of chrome ore and carbonaceous reducing agent helps the effective use of carbonaceous reducing agent in iron and chromium reduction process in the briquetting, and said iron and chromium reduction process are carried out in the multiple formation surface of these briquetting inside in phase reaction.
Embodiment
Embodiment 1
Use the undersized chrome ore stone level branch of size, contain 44.0-Cr in wt% less than 10mm 2O 34.0-SiO 2The carbonaceous reducing agent that this ore and the 0-5mm level that contains 86% solid carbon are divided mixes.Mixture is wetting and process briquetting at 25-50MPa pressure.Use component of mixture with 1: 0.3 ratio.Briquetting is packed in the electric furnace with quartzite, in wt%:
Briquetting 93.7
Quartzite 6.3
With the mixture melting, thereby produce ferrochrome and slag.
Embodiment 2
Use contains the 56-Cr in wt% 2O 312.0-SiO 2Chrome ore (0-10mm level branch).The carbonaceous reducing agent that this ore and the 0-5mm level that contains 86% solid carbon are divided mixes.Mixture is wetting and process briquetting at 25-50MPa pressure.Use component of mixture with 1: 0.5 ratio.The briquetting of producing is packed in the electric furnace with quartzite, in wt%:
Briquetting 96.2
Quartzite 3.8
With the mixture melting, thereby produce ferrochrome and slag.
Thus, the method that is proposed has strengthened the technology and the economic performance of fusion process, and has solved the problem of environmental improvement.

Claims (3)

1. the method for a melting high carbon ferro-chrome; Said method comprises the electric furnace of packing into such as the charging component of chrome ore, reductive agent and quartzose material, melting charging, discharges slag with metal, metal is separated and metal casting with slag; It is characterized in that; Use is with 1: the size of ratio mixed (0.3-0.5) is divided and the carbon containing reducer level branch of size less than 5mm less than the chrome ore stone step of 10mm, and utilizes quartzite as flux and by said mixture generation briquetting subsequently.
2. method according to claim 1 is characterized in that, in the wt% charging component of feeding as follows:
Briquetting 93.7-96.2
Quartzite 3.8-6.3
3. method according to claim 1 is characterized in that, uses to contain 44-56%Cr 2O 3And 4-12%SiO 2Ore.
CN201180004528.0A 2010-10-27 2011-04-07 Method for melting high-carbon ferrochrome Active CN102686758B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KZ2010/1327.1 2010-10-27
KZ20101327 2010-10-27
PCT/KZ2011/000006 WO2012057593A1 (en) 2010-10-27 2011-04-07 Method for melting high-carbon ferrochrome

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CN102686758A true CN102686758A (en) 2012-09-19
CN102686758B CN102686758B (en) 2014-07-09

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EA (1) EA016426B1 (en)
FI (1) FI20126085A (en)
UA (1) UA103121C2 (en)
WO (1) WO2012057593A1 (en)

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Publication number Priority date Publication date Assignee Title
EA030670B1 (en) * 2016-05-20 2018-09-28 Фазыл Каюмович ШАДИЕВ Method for producing briquettes for ferrochrome production
CN115161469A (en) * 2022-07-21 2022-10-11 山西太钢万邦炉料有限公司 Production method of high-proportion south Africa chromium ore pellets

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215522A (en) * 1960-11-22 1965-11-02 Union Carbide Corp Silicon metal production
GB1024692A (en) * 1962-01-24 1966-03-30 Techmet Ltd Production of ferro-chrome alloys
RU2008150098A (en) * 2008-12-17 2010-06-27 Государственное учреждение Институт металлургии Уральского отделения Российской Академии наук (ГУ ИМЕТ УрО РАН) (RU) MIXTURE FOR PRODUCING A HIGH-CARBON FERROCHROME

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053307A (en) * 1976-01-16 1977-10-11 Showa Denko K. K. Process for manufacture of high-chromium iron alloy
RU2083693C1 (en) * 1995-06-01 1997-07-10 Акционерное общество закрытого типа "Урал-ВИМ" Method of manufacturing chromium briquets for producing ferrochrome
RU2115627C1 (en) * 1997-05-06 1998-07-20 Открытое акционерное общество Челябинский электрометаллургический комбинат Blend for preparing high carbon ferrochrome
RU2241057C1 (en) * 2003-04-09 2004-11-27 ОАО "Серовский завод ферросплавов" Batch for producing of high-carbon ferrochrome

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215522A (en) * 1960-11-22 1965-11-02 Union Carbide Corp Silicon metal production
GB1024692A (en) * 1962-01-24 1966-03-30 Techmet Ltd Production of ferro-chrome alloys
RU2008150098A (en) * 2008-12-17 2010-06-27 Государственное учреждение Институт металлургии Уральского отделения Российской Академии наук (ГУ ИМЕТ УрО РАН) (RU) MIXTURE FOR PRODUCING A HIGH-CARBON FERROCHROME

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FI20126085A (en) 2012-10-18
UA103121C2 (en) 2013-09-10
EA201101615A1 (en) 2012-04-30
EA016426B1 (en) 2012-04-30
WO2012057593A1 (en) 2012-05-03
CN102686758B (en) 2014-07-09

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