CN103352100A - Raw rauhkalk steelmaking method - Google Patents
Raw rauhkalk steelmaking method Download PDFInfo
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- CN103352100A CN103352100A CN2013103106319A CN201310310631A CN103352100A CN 103352100 A CN103352100 A CN 103352100A CN 2013103106319 A CN2013103106319 A CN 2013103106319A CN 201310310631 A CN201310310631 A CN 201310310631A CN 103352100 A CN103352100 A CN 103352100A
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- rauhkalk
- molten iron
- steelmaking
- raw
- dolomite
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Abstract
A raw rauhkalk steelmaking method is characterized in that lightly burned rauhkalk is replaced by raw rauhkalk directly during converter steelmaking, so that a rauhkalk calcining process is eliminated to reduce steelmaking cost, steelmaking energy consumption and environment pollution; molten iron proportion is changed, so as to boost the reduction reaction of raw rauhkalk by utilizing the physical and chemical heat of molten iron; steelmaking of each ton of steal consumes the following materials: 13 to 15 kg of raw rauhkalk, 900 to 1030 kg of molten iron and 36 to 43 kg of lime. According to the method, as the rauhkalk calcining process is eliminated, manual labor and physical resource consumption as well as wastage of rauhkalk calcination and transportation is reduced; as the physical and chemical heat of molten iron is fully utilized to boost rauhkalk conversion, the energy utilization ratio is improved, and the chemical reaction of rauhkalk conversion is utilized to create a reduction atmosphere for steelmaking, which improves molten iron yield.
Description
Technical field
The invention belongs to steelmaking technical field.
Background technology
At present, carry out slag making, residue adjustment with light dolomite in the domestic process for making, need the white clouds stone kiln owing to produce light dolomite, and consume a large amount of coal gas, electric power equal energy source in the sintering procedure, the harmful exhaust that produces must just can discharge through processing, production cost is high, and energy utilization rate is low, and the recovery rate of molten iron is low.
Summary of the invention
The purpose of this invention is to provide a kind of unprocessed dolomite steelmaking process, carry out slag making, residue adjustment to solve the prior art light dolomite, need the white clouds stone kiln owing to produce light dolomite, and consume a large amount of coal gas, electric power equal energy source in the sintering procedure, the harmful exhaust that produces must just can discharge through processing, the problems such as production cost is high, and energy utilization rate is low, and the recovery rate of molten iron is low.
The technical solution adopted for the present invention to solve the technical problems is directly to replace light dolomite with unprocessed dolomite in converter steelmaking, has removed the dolomite calcination operation, to reduce steel-making cost, reduces simultaneously steel-making energy consumption and environmental pollution; Change the molten iron ratio, utilize molten iron physical thermal and chemical heat, promote the reduction reaction of unprocessed dolomite; Wherein unprocessed dolomite is 13-15 kg/ton steel, molten iron 900-1030 kg/ton steel, lime 36-43 kg/ton steel.
Its equation is:
CaCO
3→CaO+CO
2↑
MgCO
3→MgO+CO
2↑
CO
2+C+2(FeO)→2CO
2↑+Fe
Adopt positively effect of the present invention to be: one reduces the dolomite calcination operation, reduces on the one hand human and material resources and drops into, and reduces on the other hand the loss in dolomite calcination process and the transportation.Two take full advantage of molten iron physical thermal and smelting chemical heat, promote rhombspar and change, and improve energy utilization rate, and the chemical reaction that utilizes simultaneously rhombspar to change is created the reduction atmosphere for steel-making, improves the molten iron recovery rate.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples:
Fig. 1 is equation of the present invention.
Embodiment
Embodiment 1
In converter steelmaking, directly replace light dolomite with unprocessed dolomite, removed the dolomite calcination operation, to reduce steel-making cost, reduce simultaneously steel-making energy consumption and environmental pollution; Change the molten iron ratio, utilize molten iron physical thermal and chemical heat, promote the reduction reaction of unprocessed dolomite; Wherein unprocessed dolomite is 14 kg/ton steel, molten iron 920 kg/ton steel, lime 38 kg/ton steel.All the other method for making steel are same as the prior art.
Its equation is:
CaCO
3→CaO+CO
2↑
MgCO
3→MgO+CO
2↑
CO
2+C+2(FeO)→2CO
2↑+Fe
Embodiment 2
Embodiment 1
In converter steelmaking, directly replace light dolomite with unprocessed dolomite, removed the dolomite calcination operation, to reduce steel-making cost, reduce simultaneously steel-making energy consumption and environmental pollution; Change the molten iron ratio, utilize molten iron physical thermal and chemical heat, promote the reduction reaction of unprocessed dolomite; Wherein unprocessed dolomite is 14.5 kg/ton steel, molten iron 1010 kg/ton steel, lime 42 kg/ton steel.All the other method for making steel are same as the prior art.
Its equation is:
CaCO
3→CaO+CO
2↑
MgCO
3→MgO+CO
2↑
CO
2+C+2(FeO)→2CO
2↑+Fe。
Claims (1)
1. a unprocessed dolomite steelmaking process is characterized in that directly replacing light dolomite with unprocessed dolomite in converter steelmaking, has removed the dolomite calcination operation, to reduce steel-making cost, reduces simultaneously steel-making energy consumption and environmental pollution; Change the molten iron ratio, utilize molten iron physical thermal and chemical heat, promote the reduction reaction of unprocessed dolomite; Wherein unprocessed dolomite is 13-15 kg/ton steel, molten iron 900-1030 kg/ton steel, lime 36-43 kg/ton steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103106319A CN103352100A (en) | 2013-07-23 | 2013-07-23 | Raw rauhkalk steelmaking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103106319A CN103352100A (en) | 2013-07-23 | 2013-07-23 | Raw rauhkalk steelmaking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103352100A true CN103352100A (en) | 2013-10-16 |
Family
ID=49308511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103106319A Pending CN103352100A (en) | 2013-07-23 | 2013-07-23 | Raw rauhkalk steelmaking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103352100A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103509907A (en) * | 2013-10-25 | 2014-01-15 | 武汉钢铁(集团)公司 | Magnesium-matched slag-making method using raw dolomite in converter combined blowing |
| CN104404193A (en) * | 2014-11-13 | 2015-03-11 | 武汉钢铁(集团)公司 | Method for completely using raw dolomite for slagging under converter semi-automatic steel-making conditions |
| CN107148482A (en) * | 2014-12-17 | 2017-09-08 | 里弗雷克特里知识产权两合公司 | Mixture, the purposes of the mixture and the method for pre-processing the slag on the metal bath being present in Ferrous Metallurgy in metallurgical tank |
| CN111575431A (en) * | 2020-05-22 | 2020-08-25 | 山东钢铁股份有限公司 | Method for increasing CO content of converter gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1473203A (en) * | 2000-09-14 | 2004-02-04 | �ձ��ֹ���ʽ���� | Refining agent and refining method |
| CN1818093A (en) * | 2006-03-08 | 2006-08-16 | 许震 | High-efficient metallurgical refiner and preparation thereof |
| CN102660658A (en) * | 2012-05-23 | 2012-09-12 | 河北省首钢迁安钢铁有限责任公司 | Method for curing converter slag |
-
2013
- 2013-07-23 CN CN2013103106319A patent/CN103352100A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1473203A (en) * | 2000-09-14 | 2004-02-04 | �ձ��ֹ���ʽ���� | Refining agent and refining method |
| CN1818093A (en) * | 2006-03-08 | 2006-08-16 | 许震 | High-efficient metallurgical refiner and preparation thereof |
| CN102660658A (en) * | 2012-05-23 | 2012-09-12 | 河北省首钢迁安钢铁有限责任公司 | Method for curing converter slag |
Non-Patent Citations (1)
| Title |
|---|
| 陆钟武: "《冶金工业的能源利用》", 31 May 1986, 冶金工业出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103509907A (en) * | 2013-10-25 | 2014-01-15 | 武汉钢铁(集团)公司 | Magnesium-matched slag-making method using raw dolomite in converter combined blowing |
| CN103509907B (en) * | 2013-10-25 | 2015-11-18 | 武汉钢铁(集团)公司 | Join the method for magnesium slag making with unprocessed dolomite in a kind of Blowing Converter |
| CN104404193A (en) * | 2014-11-13 | 2015-03-11 | 武汉钢铁(集团)公司 | Method for completely using raw dolomite for slagging under converter semi-automatic steel-making conditions |
| CN107148482A (en) * | 2014-12-17 | 2017-09-08 | 里弗雷克特里知识产权两合公司 | Mixture, the purposes of the mixture and the method for pre-processing the slag on the metal bath being present in Ferrous Metallurgy in metallurgical tank |
| CN111575431A (en) * | 2020-05-22 | 2020-08-25 | 山东钢铁股份有限公司 | Method for increasing CO content of converter gas |
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Application publication date: 20131016 |