CN102686758B - Method for melting high-carbon ferrochrome - Google Patents

Method for melting high-carbon ferrochrome Download PDF

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Publication number
CN102686758B
CN102686758B CN201180004528.0A CN201180004528A CN102686758B CN 102686758 B CN102686758 B CN 102686758B CN 201180004528 A CN201180004528 A CN 201180004528A CN 102686758 B CN102686758 B CN 102686758B
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ore
chrome
carbon
slag
quartzite
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CN102686758A (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
    • 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
    • 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
    • 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
    • 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
    • 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

For the method for melting high carbon ferro-chrome
Technical field
The present invention relates to iron alloy and produce, exactly, relate to the method that the high carbon ferro-chrome in ore smelting electric furnace is produced.
Background technology
The method that known high carbon ferro-chrome in ore smelting stove is produced so far, wherein furnace charge is by chrome ore, carbonaceous reducing agent with prepare containing silica flux.In the method, use the lump of 10-80mm size and exceed the fraction of carbon containing reducer of 5mm.Furnace charge is fed to furnace roof and the metal being produced and slag with batchwise operation and goes out from fire grate.Metal being discharged to (Ryss M.A.Production of ferroalloys.-M.:Metallurgy, 1985,199-212 page) in mold with slag after separating from stove.
The feature of the method is as follows:
In high carbon ferro-chrome melting method, the speed of chromium reduction is low, and reason is that silica chrome ore contains 30-35%Cr 2o 3and 10-20%SiO 2.Under 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 by hindering 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 being wherein reduced.Due to the passivation reaction of the chromium reduction from picotite, what it was bathed at stove is not reduced compared with upper strata.Solid mineral particle is supplied to bottom with sizable amount, and the liquid slag winding of being flowed out from stove.
Chromium is from the mechanism of chrome ore reduction, and solid coke is reacted with iron and the chromic oxide of this ore of formation at the some place of its contact chrome ore stone.In heat-processed, carbon is diffused in whole picotite volume, forms gaseous state CO, chromium and iron carbide.Coincidently, the refractory oxide (SiO of porous rock is rich in the region that coke contacts with chrome ore 2, MgO, Al 2o 3), be mainly SiO 2thereby, between coke and picotite, produce so-called slag-metallic barrier, sharply reduce in the speed of this barrier place chromium reduction.
In the ferrochrome fusion process of ore smelting stove, in being added with containing the furnace charge of silica flux, chromium causes the melting treatment time to increase, consumes excessive and slag pick-up rate increase for ferrochrome melting specific power from the low rate of silica chrome ore reduction.
The known a kind of method that has ferrochrome melting, wherein use be of a size of 10-80mm chrome ore fraction, exceed 5mm carbon containing reducer fraction and be from produce slag-metallic scrap form containing silica flux as charging component.Furnace charge is melting in electric furnace, produces ferrochrome and slag (Ryss M.A.Production of ferroalloys.-M.:Metallurgy, 1985, the 199-212 pages).
The feature of the method is as follows:
The chromic oxide of high-content during the low rate chromite-reductive agent occurring in ore smelting stove medium high carbon ferrochrome production process due to the furnace charge being made up of chrome ore, carbonaceous reducing agent and flux in use reacts and causes waste residue, the reaction of these low rates is that the chromite of discharging by silica flux and by the silica of the porous rock existing in chrome ore causes.
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 react famous because of it with the low rate of silica, and Here it is, and chrome ore heats together with silica flux causes the reason that is difficult to form the liquid phase that chromium can therefrom be reduced.
In ferrochrome production process in ore smelting stove from containing 30-33% chromium and 10-20%SiO 2the low rate of silica chrome ore reduction chromium cause for the fusion process time of 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, chrome ore particle becomes impermeable for the CO being formed in stove bath bottom.
With the claimed the most approaching process being equal to of the present invention method (the RF patent No. 2115627, IPC C01G37/00, C22B 1/00, C 22B 1/16,1998) that is high carbon ferro-chrome melting.
The method comprises the electric furnace that is of a size of the slag that slag-metallic scrap that the chrome ore stone of 10-80mm, carbon containing reducer fraction that size exceedes 5mm, high carbon ferro-chrome produce and low carbon ferrochromium produce in the following component ratio of wt% is housed:
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 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 containing in wt%: 31-33-Cr 2o 3; 15-17-SiO 2; The coke that contains 86% carbon, flux: slag-metallic scrap that high carbon ferro-chrome is produced contains the 50-SiO in wt% 2; 20-MgO; 10-Al 2o 3; The inclusion metallic of 20-high carbon ferro-chrome, contains the 40-50CaO in wt%; 25-30SiO 2; 5-15Cr 2o 3; 4-5Al 2o 3; 8-12MgO; The slag of the low carbon ferrochromium of 1-3FeO.Charging component is supplied in electric furnace hopper.With batchwise operation, furnace charge is installed on furnace roof, mainly slagging tap and after furnace charge is laid on 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 carry out primary dcreening operation to thin fraction, and only use large charging component piece, this causes considerable thin fraction to accumulate and causes environmental degradation.
And, containing having an appointment 30%Cr 2o 3the use of smart chrome ore cause slag pick-up rate increase and reduce than furnace capacity.
Summary of the invention
The problem that the present invention solves relates to and uses in process of production the off-specification material by size material: size is less than the fraction that the chrome ore stone of 10mm and size are less than the carbon containing reducer of 5mm.
The engineering progress of realizing relates to the off-specification material using 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 assorted size (0.3-0.5) is less than the fraction (undersized ore) of the chrome ore stone of 10mm and the fraction (size is less than 5mm) of carbon containing reducer, and then they is fed in briquetting press.Produce briquetting with 25-50MPa pressure.Use contains in wt%: 44.0-56.0-Cr 2o 3; 4.0-12.0-SiO 2undersized chrome ore and the carbon containing reducer that contains 86% solid carbon.
Then, the briquetting of production is packed in hopper, and be fed to electric furnace from hopper.Quartzite is supplied to wherein, in provide with wt% as lower lock block/quartzite ratio:
Briquetting 93.7-96.2
Quartzite 3.8-6.3
Add up to 100%.
By briquetting and the quartzitic mixture melting of preparation, thereby produce ferrochrome and slag.
In briquetting, coexisting of chrome ore and carbonaceous reducing agent contributes to the effective use of carbonaceous reducing agent in iron and chromium reduction process, and described iron and chromium reduction process are carried out in the multiple formation surface in phase reaction in these briquetting inside.
Embodiment
Embodiment 1
Use size to be less than undersized chrome ore stone fraction of 10mm, contain the 44.0-Cr in wt% 2o 3; 4.0-SiO 2.This ore is mixed with the carbonaceous reducing agent of the 0-5mm fraction that contains 86% solid carbon.Mixture is soaked and makes briquetting at 25-50MPa pressure.Use component of mixture with the ratio of 1: 0.3.Briquetting is packed into together with quartzite in electric furnace, in wt%:
Briquetting 93.7
Quartzite 6.3
By mixture melting, thereby produce ferrochrome and slag.
Embodiment 2
Use contains the 56-Cr in wt% 2o 3; 12.0-SiO 2chrome ore (0-10mm fraction).This ore is mixed with the carbonaceous reducing agent of the 0-5mm fraction that contains 86% solid carbon.Mixture is soaked and makes briquetting at 25-50MPa pressure.Use component of mixture with the ratio of 1: 0.5.The briquetting of production is packed in electric furnace together with quartzite, in wt%:
Briquetting 96.2
Quartzite 3.8
By mixture melting, thereby produce ferrochrome and slag.
Thus, the method proposing has strengthened 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, described method comprises packing electric furnace, melting charging into such as the charging component of chrome ore, reductive agent and quartzose material, discharge slag with metal, metal is separated and metal casting with slag, it is characterized in that, use with 1:(0.3-0.5) the ratio size of mixing be less than the carbon containing reducer fraction that the chrome ore fraction of 10mm and size are less than 5mm, and produce briquetting by described mixture, utilize subsequently quartzite as flux.
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 containing 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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CN102686758B true 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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CN102686758A (en) 2012-09-19
WO2012057593A1 (en) 2012-05-03
EA201101615A1 (en) 2012-04-30
EA016426B1 (en) 2012-04-30
FI20126085A (en) 2012-10-18
UA103121C2 (en) 2013-09-10

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