CN103014470B - Method of using common rock ballast as slag-modifier agent for silicomanganese alloy smelting - Google Patents
Method of using common rock ballast as slag-modifier agent for silicomanganese alloy smelting Download PDFInfo
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- CN103014470B CN103014470B CN201210502482.1A CN201210502482A CN103014470B CN 103014470 B CN103014470 B CN 103014470B CN 201210502482 A CN201210502482 A CN 201210502482A CN 103014470 B CN103014470 B CN 103014470B
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- rock ballast
- common rock
- slag
- silica
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Abstract
The invention provides a method of using common rock ballast for smelting silicomanganese alloy. The method is characterized in that the afterheat of a submerged arc furnace is used for calcining common rock ballast containing calcium carbonate after silicomanganese alloy smelting molten iron is discharged, and an obtained calcined object is used as a slag-modifier agent for next silicomanganese alloy melting. Therefore, the common rock ballast replaces dolomite or lime to serve as the slag-modifier agent, the afterheat is fully used, the raw material source of the slag-modifier agent is enlarged, and the production cost is reduced.
Description
Technical field
The present invention relates to a kind of method that common rock ballast is used as the slag supplying agent of manganese alloy smelting, belong to field of metallurgy.
Background technology
Silicomanganese is by manganese, silicon, iron and a small amount of carbon and other elementary composition alloy, is a kind of of many uses, alloy that output is larger.Mainly as the reductor of Iron and Steel Production and the middle material of alloying constituent, it is also the main raw material that medium-low carbon ferromanganese is produced simultaneously.The raw material producing silicomanganese has manganese ore, Mn-rich slag, silica, coke etc.The principle of manganese alloy smelting is as follows:
MnO
2+2C=Mn + 2 CO ， SiO
2+ 2C=Si+2 CO，MnO+ SiO
2=MnSiO
3 ，
Mn + Si= MnSi
In the smelting process of silicomanganese, in order to improve the reductive condition of silicon, enough SiO2 must be had in furnace charge, to ensure that smelting process is carried out under being in acid slag all the time, but, as in pomace, SiO2 is excessive, deslagging difficulty can be caused again, therefore Smelting Simn In A adds the slag supplying agent such as rhombspar or lime usually, keeps slag to have suitable basicity, and can increase the rate of recovery of manganese.Its principle is: the main component of rhombspar is CaMg (CO
3)
2caO and MgO is decomposed under high temperature, the avidity of basic oxide CaO and MgO to SiO2 is larger than MnO, therefore MnO can be cemented out from silicate, make it with free MnO form existence, MnO activity increases, and reduces MnO and starts reduction temperature, promote that MnO+C=Mn+CO reaction equation advances to the right, the reduction adding manganese element is reclaimed.Its reaction formula is:
CaO+ MnSiO
3=CaSiO
3 + MnO, MgO+ MnSiO
3=CaSiO
3 + MnO，MnO+C=Mn + CO
At present, most of silicomanganese producer adopts rhombspar, Wingdale or lime as slag supplying agent, and these slag supplying agent prices are higher, and the smelting cost of silicomanganese remains high, and the economic benefit of enterprise cannot realize maximizing.And the lime purchasing go back to factory in a large number can not use in time, deposits in process and absorbs moisture, deliquescence, make the energy consumption of smelting process increase, time lengthening.
Summary of the invention
The object of the invention is to adopt common rock ballast to replace rhombspar or lime, as the slag supplying agent of manganese alloy smelting, reduce raw materials cost.Our unit, from the action principle of slag supplying agent, through a large amount of production practice, uses common rock ballast to replace existing slag supplying agent, obtains good technico-economical comparison.
The present invention be achieved in that manganese alloy smelting molten iron come out of the stove after mineral hot furnace add common rock ballast, common rock ballast calcines 60 ~ 90min under the waste heat of mineral hot furnace, Decomposition of Calcium Carbonate is wherein made to generate calcium oxide, add the manganese ore, coke, the silica that meet manganese alloy smelting requirement ratio, mix, adopt conventional smelting technology to smelt, obtain silicomanganese;
The rock ballast of described common rock ballast to be calcium carbonate content be 50wt% ~ 90wt%, add-on is for making basicity of slag n(CaO+MgO)/n(SiO
2) be 0.6 ~ 0.8, granular size is 10 ~ 50mm.
All to the composition detection of rock ballast, the content of calcium carbonate and the content of silicon-dioxide can be obtained before adding common rock ballast at every turn,
Also the content of each composition can be detected before adding manganese ore, coke, silica, make the manganese ore, coke, the silica compound smelting proportion requirement that add, also detect calcium oxide in manganese ore, coke, silica, silicon-dioxide and magnesian content simultaneously, then calculate and add how many common rock ballast, make basicity n(CaO+MgO)/n(SiO
2) in 0.6 ~ 0.8 scope.
N(CaO+MgO) amount is calcium oxide and magnesian content sum in manganese ore, silica, common rock ballast, n(SiO
2) amount be the content sum of silicon-dioxide in manganese ore, silica, common rock ballast.
Compared with prior art, its substantial feature and significant progress are in the present invention:
1. the present invention adopts common rock ballast as slag supplying agent, because common rock ballast source is wide, raw materials cost than rhombspar or Wingdale or lime low, use the as broad as long of common slag melting silicomanganese quality out and rhombspar or Wingdale or lime, because this reducing the cost of manufacturing enterprise.
2. the pyrolysis of the common rock ballast of the present invention adopts the waste heat of mineral hot furnace, therefore takes full advantage of waste heat, and do not need special calciner (outsourcing return rhombspar need special calciner).
3. common rock ballast is non-hygroscopic, never degenerates, and can place for a long time, and storage location does not need special warehouse (lime moisture absorption, moisture-sensitive, the carbonic acid gas absorbed in air becomes calcium carbonate, and therefore high to the moistureproofness in warehouse, the construction cost in warehouse is large).
embodiment
Embodiment 1
Manganese alloy smelting molten iron come out of the stove after mineral hot furnace to add granular size be 10 ~ 50mm calcium carbonate content is the common rock ballast of 50wt%, common rock ballast calcines 60min under the waste heat of mineral hot furnace, Decomposition of Calcium Carbonate is wherein made to generate calcium oxide, add the manganese ore, coke, the silica that meet manganese alloy smelting requirement ratio, mix, adopt conventional smelting technology to smelt, obtain silicomanganese; Add-on is for making basicity of slag n(CaO+MgO)/n(SiO
2) be 0.6 ~ 0.8.
Note: all to the composition detection of rock ballast, the content of calcium carbonate and the content of silicon-dioxide can be obtained before at every turn adding common rock ballast,
Also the content of each composition can be detected before adding manganese ore, coke, silica, make the manganese ore, coke, the silica compound smelting proportion requirement that add, also detect calcium oxide in manganese ore, coke, silica, silicon-dioxide and magnesian content simultaneously, then calculate and add how many common rock ballast, make basicity n(CaO+MgO)/n(SiO
2) in 0.6 ~ 0.8 scope.N(CaO+MgO) amount is calcium oxide and magnesian content sum in manganese ore, silica, common rock ballast, n(SiO
2) amount be the content sum of silicon-dioxide in manganese ore, silica, common rock ballast.
Embodiment 2
After in embodiment 1, manganese alloy smelting is come out of the stove, to add granular size in mineral hot furnace be 10 ~ 50mm calcium carbonate content is the common rock ballast of 90wt%, common rock ballast calcines 90min under the waste heat of mineral hot furnace, Decomposition of Calcium Carbonate is wherein made to generate calcium oxide, add the manganese ore, coke, the silica that meet manganese alloy smelting requirement ratio, mix, adopt conventional smelting technology to smelt, obtain silicomanganese; Add-on is for making basicity of slag n(CaO+MgO)/n(SiO
2) be 0.6 ~ 0.8.
Note: all can to the composition detection of rock ballast before at every turn adding common rock ballast, obtain the content of calcium carbonate and the content of silicon-dioxide, also the content of each composition can be detected before adding manganese ore, coke, silica, make the manganese ore, coke, the silica compound smelting proportion requirement that add, also detect calcium oxide in manganese ore, coke, silica, silicon-dioxide and magnesian content simultaneously, then calculate and add how many common rock ballast, make basicity n(CaO+MgO)/n(SiO
2) in 0.6 ~ 0.8 scope.N(CaO+MgO) amount is calcium oxide and magnesian content sum in manganese ore, silica, common rock ballast, n(SiO
2) amount be the content sum of silicon-dioxide in manganese ore, silica, common rock ballast.
Claims (1)
1. a common rock ballast is used for the method for manganese alloy smelting slag supplying agent, it is characterized in that: in the mineral hot furnace after a upper stove manganese alloy smelting molten iron is come out of the stove, add common rock ballast, common rock ballast calcines 60 ~ 90min under the waste heat of mineral hot furnace, add the manganese ore, coke, the silica that meet manganese alloy smelting requirement ratio, mix, adopt conventional smelting technology to smelt, obtain silicomanganese;
The rock ballast of described common rock ballast to be calcium carbonate content be 50wt% ~ 90wt%, add-on is for making basicity of slag n(CaO+MgO)/n(SiO
2) be 0.6 ~ 0.8, granular size is 10 ~ 50mm;
Described n(CaO+MgO) amount be calcium oxide and magnesian content sum in manganese ore, silica, common rock ballast, n(SiO
2) amount be the content sum of silicon-dioxide in manganese ore, silica, common rock ballast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210502482.1A CN103014470B (en) | 2012-11-30 | 2012-11-30 | Method of using common rock ballast as slag-modifier agent for silicomanganese alloy smelting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210502482.1A CN103014470B (en) | 2012-11-30 | 2012-11-30 | Method of using common rock ballast as slag-modifier agent for silicomanganese alloy smelting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103014470A CN103014470A (en) | 2013-04-03 |
| CN103014470B true CN103014470B (en) | 2015-02-04 |
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|---|---|---|---|
| CN201210502482.1A Expired - Fee Related CN103014470B (en) | 2012-11-30 | 2012-11-30 | Method of using common rock ballast as slag-modifier agent for silicomanganese alloy smelting |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103555973A (en) * | 2013-07-23 | 2014-02-05 | 内蒙古鄂尔多斯冶金有限责任公司 | Formula for recycling silicon-manganese alloy slag during silicon-manganese alloy production |
| CN106119542B (en) * | 2016-07-18 | 2018-11-02 | 周三虎 | Silicon-manganese alloy smelting process |
| CN114606404A (en) * | 2022-03-09 | 2022-06-10 | 石横特钢集团有限公司 | Method for producing manganese-silicon alloy by using steel slag to replace light-burned dolomite |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4053302A (en) * | 1976-10-05 | 1977-10-11 | The United States Of America As Represented By The Secretary Of The Interior | Synthetic fluorspar for conditioning electric furnace slags |
| CN1058049A (en) * | 1990-04-06 | 1992-01-22 | 谭氏陶器有限公司 | The composition and the method that are used for Synthetic Steel cinder inclusion, processing ladle slag and coating refractory cylinder-packing |
| CN1375566A (en) * | 2001-12-28 | 2002-10-23 | 纪翔 | Silico-manganese alloy producing process in MF furnace |
| CN101161835A (en) * | 2007-11-07 | 2008-04-16 | 内蒙古鄂尔多斯冶金有限责任公司 | Utilization process of ferrosilicon smelting slag in silicon-manganese alloy smelting |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5521510A (en) * | 1978-07-31 | 1980-02-15 | Daido Steel Co Ltd | Manufacture of manganese or manganese-base alloy ingot |
-
2012
- 2012-11-30 CN CN201210502482.1A patent/CN103014470B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4053302A (en) * | 1976-10-05 | 1977-10-11 | The United States Of America As Represented By The Secretary Of The Interior | Synthetic fluorspar for conditioning electric furnace slags |
| CN1058049A (en) * | 1990-04-06 | 1992-01-22 | 谭氏陶器有限公司 | The composition and the method that are used for Synthetic Steel cinder inclusion, processing ladle slag and coating refractory cylinder-packing |
| CN1375566A (en) * | 2001-12-28 | 2002-10-23 | 纪翔 | Silico-manganese alloy producing process in MF furnace |
| CN101161835A (en) * | 2007-11-07 | 2008-04-16 | 内蒙古鄂尔多斯冶金有限责任公司 | Utilization process of ferrosilicon smelting slag in silicon-manganese alloy smelting |
Non-Patent Citations (1)
| Title |
|---|
| JP昭55-21510A 1980.02.15 * |
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