CN101962714B - Production method of low-silicon low-titanium and high-carbon ferrochrome smelted by submerged arc furnace - Google Patents
Production method of low-silicon low-titanium and high-carbon ferrochrome smelted by submerged arc furnace Download PDFInfo
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- CN101962714B CN101962714B CN201010522498XA CN201010522498A CN101962714B CN 101962714 B CN101962714 B CN 101962714B CN 201010522498X A CN201010522498X A CN 201010522498XA CN 201010522498 A CN201010522498 A CN 201010522498A CN 101962714 B CN101962714 B CN 101962714B
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Abstract
The invention discloses a production method of low-silicon low-titanium and high-carbon ferrochrome smelted by a submerged arc furnace, comprising: proportioning chrome ore, coke and flux silica at the weight ratio of 70:13:1, wherein the chrome ore contains 35-42 wt% of Cr2O3, the granularity of the chrome ore is 5-60 mm, the coke contains 82-86 wt% of fixed carbon, the granularity of the coke is 8-30 mm, the flux silica contains more than or equal to 97 wt% of SiO2, and the granularity of the flux silica is 10-30 mm; after mixing, add into a 12500KVA submerged arc furnace by a bin, and continuously smelt at 1550-1750 DEG C, wherein the basicity of slag is 1.1-1.5; producing the low-silicon low-titanium and high-carbon ferrochrome containing less than 0.3% of silicon and less than 0.03% of titanium by a pouring mode after separating slag.
Description
Technical field
The invention belongs to metallurgical technology field, relate to the hot stove in a kind of ore deposit and smelt the working method of producing low silicon low-Ti high-C ferrochronium continuously, relating in particular to the chrome ore is that the hot stove in raw material ore deposit is smelted the method for producing low silicon low-Ti high-C ferrochronium continuously.
Background technology
In industries such as ferrous metallurgy and castings, high carbon ferro-chrome is widely used as important source material and additive, and along with development of market economy, iron and steel enterprise is more and more harsher to the requirement of high carbon ferro-chrome alloying constituent; In the raw material of the production of special bearing steel, the content of titanium, silicon in the high carbon ferro-chrome alloy is had special requirement, silicone content less than 0.3%, titanium content is increasing less than 0.03% high carbon ferro-chrome product demand.
One Chinese patent application numbers 20610022468 has been announced a kind of ferrochromium alloy with very low titanium content and high carbon content and working method thereof, is to be raw material with aboundresources and inexpensive high carbon ferro-chrome; By batching, go into that stove is smelted, steps such as fusion is skimmed, ingot mould cast; Smelt the ferrochromium alloy with very low titanium content and high carbon content product that production titaniferous amount is lower than 0.02% advanced level with " selective oxidation method ", its staple is: Cr45～75%, C4～10%; Ti0.001～0.020%, surplus are iron and unavoidable impurities.This method utilizes high carbon ferro-chrome to be raw material, increases by a step production process, and it is higher to consume energy.
One Chinese patent application number 01131538 has been announced a kind of process for producing low-Ti high-C ferrochronium, chrome ore: Cr
2O
3>=40%, Cr/Fe>=1.8, (MgO+CaO)/Al
2O
3=1～1.6, Ti≤0.10%, granularity 40mm; Coke: fixed carbon>=82%, ash content≤15%, P≤0.025%, Ti≤0.15%, granularity 6～18mm; Silica: SiO
2>=97%, Al
2O
3≤1.5%, washing inclusion-free, granularity 20～40mm; Above-mentioned raw materials mixed to put in the stove smelts, in the stove temperature between 1600～1800 ℃, control slag ternary slag type in smelting process: MgO32～38%, SiO
228～32%, Al
2O
322～27%, in smelting process, in time replenish furnace charge, especially regularly add coke and magnesian in the iron notch zone.
Summary of the invention
The objective of the invention is to solve the problem that prior art exists, providing with chrome ore, coke, silica is that raw material passes through the low silicon low-Ti high-C ferrochronium alloy addition of productions such as CONTROL PROCESS and basicity of slag; Raw material does not need pre-treatment, is directly smelted by raw material and produces qualified low silicon low-Ti high-C ferrochronium, and need regularly not add charcoal and magnesian at the discharge port place.
The objective of the invention is to realize through following technical scheme: the working method of the low silicon low-Ti high-C ferrochronium of a kind of mine heat furnace smelting, it is characterized in that: with chrome ore, coke, silica is raw material, in mass, chrome ore Cr
2O
3Content 35～42%, granularity are 5～60mm, and coke fixed carbon content 82～86%, granularity are 8～30mm, flux silica SiO
2Content is not less than 97%, granularity is 10～30mm, according to chrome ore: coke: silica=70: 13: 1, by batching center mix after furnace top bin add in the hot stove in 12500KVA ore deposit; Smelt through 1550～1750 ℃ of successive, basicity of slag 1.1～1.5 adopts and divides the mode of pouring into a mould behind the slag to produce; The low silicon low-Ti high-C ferrochronium alloy of producing: chromium 55～65%, silicon≤0.3%, titanium≤0.03%; 6.0%＜carbon≤10%; Sulphur≤0.1%, phosphorus≤0.03%, all the other are iron and other trace element.
The working method of the low silicon low-Ti high-C ferrochronium of above-mentioned mine heat furnace smelting, basicity of slag is controlled to be 1.1～1.25.
The working method of the low silicon low-Ti high-C ferrochronium of above-mentioned mine heat furnace smelting, in the low silicon low-Ti high-C ferrochronium alloy of producing, siliceous amount percentage composition less than 0.3%, titanium quality percentage composition is less than 0.03%.
2.2.4.6 low-Ti high-C ferrochronium ferrochromium high carbon with low titanium among the State Standard of the People's Republic of China GB/T14984.1-2010 " iron alloy term part 1: material ", the titaniferous amount is not more than 0.05% high carbon ferro-chrome.According to above-mentioned national standard and the metallurgy industry standard YB/T4154-2006 of the People's Republic of China " low-Ti high-C ferrochronium ", with silicone content of the present invention less than 0.3%, titanium content is defined as " low silicon low-Ti high-C ferrochronium " less than the name of product of 0.03% high carbon ferro-chrome alloy.
The key problem of the working method of the low silicon low-Ti high-C ferrochronium of mine heat furnace smelting of the present invention is generation that reduces silicon and titanium and the ratio that increases titanium oxide entering slag.
The raw material of mentioning among the present invention is processed into desired granularity can guarantee that principal element is had ventilation property preferably simultaneously by fully reduction when smelting in continuous smelting process, and smelting can normally be carried out.
The raw material of mentioning among the present invention joins in the 12500KVA ore-smelting furnace to be smelted through continuous, and its Control for Kiln Temperature is at 1550～1750 ℃, and basicity of slag is controlled at 1.1～1.5 in the smelting process, silicon in the product≤0.3%, titanium≤0.03%; Particularly siliceous amount percentage composition less than 0.3%, titanium quality percentage composition is less than 0.03%.
The low silicon low-Ti high-C ferrochronium of mine heat furnace smelting production of the present invention is a kind of novel stainless steel additive; In its composition siliceous amount percentage composition less than 0.3%, titanium quality percentage composition is less than 0.03%; It is the necessary raw material of producing the special bearing steel; Particularly low titanium products can improve the mechanical property of bearing steel, increases the density of bearing steel.
The present invention compared with prior art has following marked improvement and positively effect:
1, simple, the production cost of the low silicon process for producing low-Ti high-C ferrochronium produced of the present invention is starkly lower than prior art.
3, the low silicon low-Ti high-C ferrochronium of the present invention's production is to adopt the hot stove in ore deposit to smelt continuously, and its equipment need not be transformed again, no facility investment, and the smelting technology reasonable in technology adopts the hot stove in industriallization ore deposit to smelt continuously, and its Product Status is good, stable components.
4, the low silicon low-Ti high-C ferrochronium of the present invention's production is thanks to being produced under the carbon condition, and the consumption of ton ferrocoke has reduced by 10% on year-on-year basis, has considerable energy saving and reduces discharging characteristics.
5, the used various raw materials of low silicon low-Ti high-C ferrochronium of the present invention's production can needn't carry out pre-treatment to above-mentioned raw materials directly into mine heat furnace smelting, have shortened technical process, have practiced thrift the energy, help improving the recovery of principal element.
Specific embodiments
Combine concrete practical condition that the present invention is further narrated as follows at present:
The working method of the low silicon low-Ti high-C ferrochronium of mine heat furnace smelting is a raw material with chrome ore, coke, silica, 700 kilograms of chrome ore, 131 kilograms of coke, 10 kilograms of SiO that fixed carbon content 85.89% granularity is 8～30mm that granularity is 5～60mm
2Content 97% granularity is the flux silica of 10～30mm, and the raw material in storage bin is transported to furnace top bin by the automatic weighing of proportioning and after mixing by conveyor, joins in the hot stove in 12500KVA ore deposit through filling tube again; Smelt about 2 hours continuously by emitting in the stove through 1550～1750 ℃; The molten iron temperature of coming out of the stove is 1620 ℃; High carbon ferro-chrome alloy and slag are put into hot metal ladle and cinder ladle, and molten iron pours into it in ingot mould after undue slag is handled, and the alloy cooling is after fragmentation, finishing, weighing, warehouse-in.The low silicon low-Ti high-C ferrochronium alloy that mine heat furnace smelting is produced, its quality percentage composition is: chromium 61.55%, silicon 0.17%, titanium 0.0278%, carbon 8.37%, titanium 0.0278%, sulphur 0.048%, phosphorus 0.024%, all the other are iron and other trace element.
The working method of the low silicon low-Ti high-C ferrochronium of above-mentioned smelting, its said raw material chrome ore chemical ingredients and quality percentage composition are:
| Chemical ingredients | Cr 2O 3 | SiO 2 | CaO | MgO | Al 2O 3 | Fe | Ti |
| Chrome ore 1 mass content % | 35.64 | 11.7 | 1.54 | 10.74 | 11.88 | 16.33 | 0.32 |
| Chrome ore 2 mass content % | 38.31 | 11.54 | 1.12 | 22.26 | 8.41 | 9.38 | 0.08 |
The control basicity of slag is several 1.1～1.25 in the instance of the present invention, and slag composition and quality percentage composition thereof are: Cr3.0%, SiO
233.5%, CaO3.5%, MgO38.48%, Al
2O
317.59%, Ti0.3%.Be in order to suppress the reduction of silicon and metal Ti in the smelting process, to increase SiO
2, TiO
2Get into the ratio of slag.
The present invention is with the low silicon low-Ti high-C ferrochronium alloy of 12500KVA mine heat furnace smelting, and melting electric consumption alloy per ton is 3391KWh, and chrome ore consumption is alloy 2156Kg per ton, and silica consumption is alloy 34Kg per ton, and coke consumption is alloy 435Kg per ton.
Claims (3)
1. the working method of the low silicon low-Ti high-C ferrochronium of a mine heat furnace smelting, it is characterized in that: with chrome ore, coke, silica is raw material, in mass, chrome ore Cr
2O
3Content 35～42%, granularity are 5～60mm, and coke fixed carbon content 82～86%, granularity are 8～30mm, flux silica SiO
2Content is not less than 97%, granularity is 10～30mm, presses chrome ore: coke: silica=70: 13: 1 batchings, by batching center mix after furnace top bin add in the hot stove in 12500KVA ore deposit; Smelt through 1550～1750 ℃ of successive, basicity of slag 1.1～1.5 adopts and divides the mode of pouring into a mould behind the slag to produce; The low silicon low-Ti high-C ferrochronium alloy of producing: chromium 55～65%, silicon≤0.3%, titanium≤0.03%; 6.0%＜carbon≤10%; Sulphur≤0.1%, phosphorus≤0.03%, all the other are iron and other trace element.
2. the working method of the low silicon low-Ti high-C ferrochronium of mine heat furnace smelting according to claim 1 is characterized in that described smelting-furnace slag basicity is controlled to be 1.1～1.25.
3. the working method of the low silicon low-Ti high-C ferrochronium of mine heat furnace smelting according to claim 1 is characterized in that in the described low silicon low-Ti high-C ferrochronium alloy, siliceous amount percentage composition less than 0.3%, titanium quality percentage composition is less than 0.03%.
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| CN103343276B (en) * | 2013-06-03 | 2016-01-20 | 江苏大学 | A kind of Chromium molybdenum iron alloy and preparation method thereof |
| CN105925829B (en) * | 2016-04-29 | 2018-08-07 | 内蒙古华鑫硅材料科技有限公司 | A kind of production method of silicochromium |
| CN105908061B (en) * | 2016-06-12 | 2018-01-02 | 江苏省冶金设计院有限公司 | A kind of method for producing high carbon ferro-chrome |
| CN106244753B (en) * | 2016-07-19 | 2018-08-17 | 五矿（湖南）铁合金有限责任公司 | Medium carbon ferrochrome new process for producing |
| CN106319124A (en) * | 2016-09-08 | 2017-01-11 | 江苏省冶金设计院有限公司 | Preparing method for ferrochrome silicon alloy |
| CN108977678B (en) * | 2018-08-09 | 2019-06-28 | 徐州宏阳新材料科技有限公司 | A kind of low-Ti high-C ferrochronium and its smelting process |
| CN110777293A (en) * | 2019-09-24 | 2020-02-11 | 王应青 | Low-silicon low-titanium high-carbon ferrochromium and preparation method thereof |
| CN114921648B (en) * | 2022-06-17 | 2023-06-23 | 山西太钢万邦炉料有限公司 | Method for producing high-silicon furnace burden ferrochrome by submerged arc furnace |
| CN115522083B (en) * | 2022-10-12 | 2023-09-22 | 嘉峪关宏电铁合金有限责任公司 | Method for reducing crushing difficulty of high-carbon ferrochrome |
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| JPS6014094B2 (en) * | 1981-01-27 | 1985-04-11 | 日本鋼管株式会社 | Manufacturing method of low titanium high carbon ferrochrome |
| CN1172010C (en) * | 2001-11-15 | 2004-10-20 | 湖南铁合金集团有限公司 | process for producing low-Ti High-C ferrochronium |
| CN1974828A (en) * | 2006-12-11 | 2007-06-06 | 四川川投峨眉铁合金（集团）有限责任公司 | Ferrochromium alloy with very low titanium content and high carbon content and its production process |
| CN101608261A (en) * | 2009-06-28 | 2009-12-23 | 杨国尧 | The method of producing high carbon ferro-chrome by using chromite powder |
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Address after: 132002 No. 21 Heping Street, Changyi District, Jilin, Jilin Patentee after: Jilin Iron Alloy Co., Ltd. Address before: 132002 No. 21 Heping Street, Changyi District, Jilin, Jilin Patentee before: Sinosteel Jilin Ferroalloys Co., Ltd. |
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Effective date of registration: 20200107 Address after: 012100 West Park of Fengzhen City, Ulanchabu City, Inner Mongolia Autonomous Region Patentee after: Jifei Ferroalloy Co., Ltd. Address before: 132002 No. 21 Heping Street, Changyi District, Jilin, Jilin Patentee before: Jilin Iron Alloy Co., Ltd. |
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