CN1924056A - Technology of one-step smelting medium carbon ferrochrome from chromite utilizing mine smelting furnace - Google Patents
Technology of one-step smelting medium carbon ferrochrome from chromite utilizing mine smelting furnace Download PDFInfo
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- CN1924056A CN1924056A CN 200510093590 CN200510093590A CN1924056A CN 1924056 A CN1924056 A CN 1924056A CN 200510093590 CN200510093590 CN 200510093590 CN 200510093590 A CN200510093590 A CN 200510093590A CN 1924056 A CN1924056 A CN 1924056A
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- chrome iron
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Abstract
The invention discloses a C-Cr Fe fusing technology through ore heating furnace, which is characterized by the following: adding 8-20% silica, 4-10% coke and 1.5% dolomite in the ore heating furnace; setting the adding quantity of silica and coke at 2: 1; finishing the fusing procedure within 2000kwh.
Description
Technical field:
The invention belongs to metallurgy industry Zhong Chrome iron smelting technology, Te other Shi Chrome iron ore utilizes the hot stove single stage method in ore deposit to smelt medium carbon ferrochrome technology.
Background technology:
Existing medium carbon ferrochrome smelts generally that Shi Yi Chrome iron ore, coke, quartzite, steel cuttings are raw material, drops in the hot stove in ore deposit after preparing burden and smelts.Contain Cr in the Chrome iron ore
2O
3More than 60%.Gao De Chrome content makes that the carbon content in the Chrome iron is difficult to lower Zhong smelting process like this, and existing smelting process can only be to produce earlier product such as Gao Tan Chrome iron, Gui Chrome with the hot stove in ore deposit, and then in smelting in the input electric arc furnace, Di Tan Chrome iron.The utilization ratio in this traditional smelting technology cost Gao, Chrome ore deposit is low, smelting cycle is long, and pollutes bigger.ZL93102123.5 discloses a kind of Fen Chrome ore deposit reductive sintered agglomeration Ye Lian Chrome iron alloy technology, employing is allocated part flux in sintered material, sintering in reducing atmosphere, but still need put into electric arc furnace again and smelt, and can only produce high carbon Chrome iron.
Summary of the invention:
The objective of the invention is to: it is raw material that a kind of single stage method smelting technology ， Yi Chrome iron ore is provided, and utilizes the hot stove in ore deposit directly to smelt medium carbon ferrochrome.Energy-conservation, shortening smelting cycle, the yield of Ti Gao Chrome reduces cost, reduces pollution.
The present invention is that the: Yi Zhong Chrome iron ore that is achieved through the following technical solutions utilizes the hot stove single stage method in ore deposit to smelt medium carbon ferrochrome technology, raw material comprises the Chrome iron ore, in the hot stove in ore deposit, carry out, in smelting process, add the silicon-dioxide of 8-20% (weight ratio Yi Chrome iron ore amount is 100%) and the coke of 4-10% (weight ratio ， Yi Chrome iron ore amount is 100%), the rhombspar of 1.5% (weight ratio Yi Chrome iron ore amount is 100%), the add-on of silicon-dioxide and coke remained on 2: 1.
In actually operating, silicon-dioxide is that carrier adds with the quartzite, and the quartzite and the rhombspar that add in described quartzite and rhombspar and the general mine heat furnace smelting are identical.
For smelting the different medium carbon ferrochrome of carbon content, the add-on of silicon-dioxide and coke has corresponding adjustment.
The present invention removes by mine belt by the amount of adding silicon-dioxide and coke with certain proportion and goes into carbon in the molten iron.The effect one of silicon-dioxide is the carbon that reduces in the molten iron, the 2nd, and the silicone content in the Ti Gao Chrome iron.It is a decarburizer, is again reductive agent.A part of silicon replaces in the carbon Jin Ru Chrome iron in real reaction, and a part of silicon combines generation silicon carbide and discharges with slag with carbon.With technology of the present invention can be raw material with ore deposit hot stove ， Yi Chrome iron ore, and single stage method smelts medium carbon ferrochrome.Shortened smelting cycle, reduced cost.One ton of medium carbon ferrochrome of two step method refining needs 3700 kilowatt-hours of power consumptions, and the present invention only needs 2000 kilowatt-hours.One step smelting cycle shortens, and has also reduced pollution simultaneously.The present invention has utilized the reduction characteristic of silicon-dioxide dexterously, accurately, scientifically controlled the input amount of silicon-dioxide, has overcome in the prior art affiliation that adds of silicon-dioxide and has given the hurtful prejudice of smelting furnace, has obtained beyond thought effect.
Embodiment:
General medium carbon ferrochrome can be divided into Three Estate according to the content of carbon, and promptly carbon content is respectively C≤4.0%, C≤2.0%, C≤1.0%.For these three kinds of situations, the silicon-dioxide and the coke that are added are adjusted to some extent.
Embodiment one, Yi Zhong Chrome iron ore utilize the hot stove single stage method in ore deposit to smelt medium carbon ferrochrome technology, raw material comprises the Chrome iron ore, in the hot stove in ore deposit, carry out, the coke that in smelting process, adds the silicon-dioxide and 6% (weight ratio Yi Chrome iron ore amount is 100%) of 12% (weight ratio Yi Chrome iron ore amount is 100%), the rhombspar of 1.5% (weight ratio ， Yi Chrome iron ore amount is 100%).In this case, smelt C≤4.0% in the medium carbon ferrochrome that.
Embodiment two, Yi Zhong Chrome iron ore utilize the hot stove single stage method in ore deposit to smelt medium carbon ferrochrome technology, raw material comprises the Chrome ore deposit, in the hot stove in ore deposit, carry out, the coke that in smelting process, adds the silicon-dioxide and 7.5% (weight ratio Yi Chrome iron ore amount is 100%) of 15% (weight ratio Yi Chrome iron ore amount is 100%), the rhombspar of 1.5% (weight ratio ， Yi Chrome iron ore amount is 100%).In this case, smelt C≤2.0% in the medium carbon ferrochrome that.
Embodiment three, Yi Zhong Chrome iron ore utilize the hot stove single stage method in ore deposit to smelt medium carbon ferrochrome technology, raw material comprises the Chrome ore deposit, in the hot stove in ore deposit, carry out, the coke that in smelting process, adds the silicon-dioxide and 5% (weight ratio Yi Chrome iron ore amount is 100%) of 10% (weight ratio Yi Chrome iron ore amount is 100%), the rhombspar of 1.5% (weight ratio ， Yi Chrome iron ore amount is 100%).In this case, smelt C≤1.0% in the medium carbon ferrochrome that.
In actual production, because the uncertain factor in the technological process, the silicon-dioxide of adding and amount of coke will be controlled according to practical situation.The add-on of silicon-dioxide reaches as high as 20%, minimumly reaches 8%; Corresponding coke add-on is respectively 10% and 4%.
In fact because the silicon-dioxide of occurring in nature mostly is present in the quartzite, generally contain silicon-dioxide in the quartzite at 80-90%.With 80 degree quartzites (containing silicon-dioxide 80%) be example, generally takes to add 80 degree quartzite 10-25% (weight ratio ， Yi Chrome iron ore amount is 100%, down with), coke 4-10%, 1.5% rhombspar among the present invention.
Adopt 90 degree quartzites when (containing silicon-dioxide 90%), generally taking to add 90 degree quartzite 8.88-22.22% (weight ratio ， Yi Chrome iron ore amount is 100%, down with), coke 4-10%, 1.5% rhombspar among the present invention.
According to the quartzite of different purity, can adjust the variation of add-on.
The yield of Zhong ， Chrome of the present invention reaches 95-96%, and the yield of iron reaches 97-98%.
Claims (7)
1, Yi Zhong Chrome iron ore utilizes the hot stove single stage method in ore deposit to smelt medium carbon ferrochrome technology, raw material comprises the Chrome iron ore, in the hot stove in ore deposit, carry out, it is characterized in that: in smelting process, add the silicon-dioxide of 8-20% (weight ratio Yi Chrome iron ore amount is 100%) and the coke of 4-10% (weight ratio ， Yi Chrome iron ore amount is 100%), the rhombspar of 1.5% (weight ratio Yi Chrome iron ore amount is 100%), the add-on of silicon-dioxide and coke remained on 2: 1.
2, utilize the hot stove single stage method in ore deposit to smelt medium carbon ferrochrome technology according to claim 1 Suo Shu De Chrome iron ore, it is characterized in that: described silicon-dioxide is that carrier adds with the quartzite, and the quartzite and the rhombspar that add in described quartzite and rhombspar and the general mine heat furnace smelting are identical.
3, utilize the hot stove single stage method in ore deposit to smelt medium carbon ferrochrome technology according to claim 1 or 2 Shu De Chrome iron ores, it is characterized in that the add-on of described silicon-dioxide and coke is respectively 12% and 6%.
4, utilize the hot stove single stage method in ore deposit to smelt medium carbon ferrochrome technology according to claim 1 or 2 Shu De Chrome iron ores, it is characterized in that the add-on of described silicon-dioxide and coke is respectively 15% and 7.5%.
5, utilize the hot stove single stage method in ore deposit to smelt medium carbon ferrochrome technology according to claim 1 or 2 Shu De Chrome iron ores, it is characterized in that the add-on of described silicon-dioxide and coke is respectively 10% and 5%.
6, utilize the hot stove single stage method in ore deposit to smelt medium carbon ferrochrome technology according to claim 1 or 2 Shu De Chrome iron ores, it is characterized in that described silicon-dioxide is that carrier adds with 80 degree quartzites, the add-on of 80 degree quartzites is that the add-on of 10-25% (weight ratio Yi Chrome iron ore amount is 100%, down together), coke is 4-10%.
7, utilize the hot stove single stage method in ore deposit to smelt medium carbon ferrochrome technology according to claim 1 or 2 Shu De Chrome iron ores, it is characterized in that described silicon-dioxide is that carrier adds with 90 degree quartzites, the add-on of 90 degree quartzites is that the add-on of 8.88-22.22% (weight ratio Yi Chrome iron ore amount is 100%, down together), coke is 4-10%.
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| CNB2005100935908A CN100392130C (en) | 2005-08-30 | 2005-08-30 | Technology of one-step smelting medium carbon ferrochrome from chromite utilizing mine smelting furnace |
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| CNB2005100935908A CN100392130C (en) | 2005-08-30 | 2005-08-30 | Technology of one-step smelting medium carbon ferrochrome from chromite utilizing mine smelting furnace |
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| CN1924056A true CN1924056A (en) | 2007-03-07 |
| CN100392130C CN100392130C (en) | 2008-06-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294002A (en) * | 2014-10-23 | 2015-01-21 | 北京科技大学 | Method for smelting medium- and low-carbon ferrochromium by introducing one-step method of carbon dioxide converter |
| CN105925829A (en) * | 2016-04-29 | 2016-09-07 | 江苏浩博新材料股份有限公司 | Production method of silicon-chromium alloy |
| CN109136440A (en) * | 2018-08-06 | 2019-01-04 | 万国雄 | A kind of high carbon ferro-chrome composition and its smelting process |
| CN114921648A (en) * | 2022-06-17 | 2022-08-19 | 山西太钢万邦炉料有限公司 | Method for producing high-silicon furnace material ferrochrome by submerged arc furnace |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52123313A (en) * | 1976-04-09 | 1977-10-17 | Japan Metals & Chem Co Ltd | Production of low p low c high cr ferro alloy |
| CN1044391C (en) * | 1995-08-23 | 1999-07-28 | 甘肃华藏冶炼厂 | One-step process for producing medium-low carbon chromium iron |
| RU2228383C2 (en) * | 2002-07-17 | 2004-05-10 | Открытое акционерное общество "Институт Гипроникель" | Ferrochrome manufacture process |
-
2005
- 2005-08-30 CN CNB2005100935908A patent/CN100392130C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294002A (en) * | 2014-10-23 | 2015-01-21 | 北京科技大学 | Method for smelting medium- and low-carbon ferrochromium by introducing one-step method of carbon dioxide converter |
| CN105925829A (en) * | 2016-04-29 | 2016-09-07 | 江苏浩博新材料股份有限公司 | Production method of silicon-chromium alloy |
| CN109136440A (en) * | 2018-08-06 | 2019-01-04 | 万国雄 | A kind of high carbon ferro-chrome composition and its smelting process |
| CN114921648A (en) * | 2022-06-17 | 2022-08-19 | 山西太钢万邦炉料有限公司 | Method for producing high-silicon furnace material ferrochrome by submerged arc furnace |
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| CN100392130C (en) | 2008-06-04 |
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai pioneered nickel iron smelting New Technology Co., Ltd. Assignor: Liu Shenjie Contract fulfillment period: 2007.7.1 to 2013.6.4 contract change Contract record no.: 2008330000878 Denomination of invention: Technology of one-step smelting medium carbon ferrochrome from chromite utilizing mine smelting furnace Granted publication date: 20080604 License type: exclusive license Record date: 2008.10.8 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.7.1 TO 2013.6.4; CHANGE OF CONTRACT Name of requester: SHANGHAI SHOUCHUANG FERRONICKEL SMELTERING NEW TEC Effective date: 20081008 |
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