CN104726643A - Technique for using calcium carbonate carbon spheres in LF (ladle furnace) steelmaking - Google Patents
Technique for using calcium carbonate carbon spheres in LF (ladle furnace) steelmaking Download PDFInfo
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- CN104726643A CN104726643A CN201510125274.8A CN201510125274A CN104726643A CN 104726643 A CN104726643 A CN 104726643A CN 201510125274 A CN201510125274 A CN 201510125274A CN 104726643 A CN104726643 A CN 104726643A
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Abstract
The invention discloses a technique for using calcium carbonate carbon spheres in LF (ladle furnace) steelmaking, which comprises the following steps: pulverizing limestone to the granularity of 1mm below, evenly mixing with graphitic carbon, and pressing with a dry powder sphere presser to obtain calcium carbonate carbon spheres, wherein when producing every 100kg of calcium carbonate carbon spheres, the addition amount of limestone is y (y=83(100beta-51)/(83beta-12gamma)), the addition amount of the graphitic carbon is 100-y, beta is the carbon content (%) in the graphite, and gamma is the calcium carbonate content (%) in the limestone; and when smelting aluminum killed steel in a converter, adding the calcium carbonate carbon spheres according to the principle of equal addition amount to the substituted traditional calcium carbide, and using according to the traditional steelmaking technique.
Description
Technical field
The present invention relates to process for making, particularly a kind of calcium carbonate carbon ball is applied to the technique of LF steel-making.
Background technology
In steelmaking process, calcium carbide generally will be used to carry out deoxidation, after mainly utilizing carbide of calcium wherein to decompose, oxygen or the oxide compound of carbon wherein and molten steel or slag centre react, and play the object reducing oxygen level in molten steel or slag.The deoxidation products of calcium carbide deoxidization technique is CO and CaO, in steel liquid deoxidation, does not pollute molten steel, does not reduce the basicity of slag in slag deoxidation.
But the calcium carbide that steel-making uses is in transport and storage process, easily become damp and rotten, have a negative impact, add that calcium carbide is produced and belong to high energy consumption industry, belong to the industry of state control development, so the prospect using calcium carbide to make steel in steelmaking process and cost have certain pressure for steel-making.
Searching document discloses: the Zhao Xuyang of (1) Beijing Jiaotong University has following content statement in the middle of the master thesis " analysis of calcium carbide combined packaging bag safety of railway traffic " of 2012: the content statement of " calcium carbide belongs to one-level and meets wet inflammable explosive article; the main province of production of national calcium carbide is the Inner Mongol, Xinjiang and Ningxia, and calcium carbide needs to be transported to the well-developed regions such as North China from western part after producing "; (2) " introduction of oxygen method calcium carbide production technique " that be entitled as of Chinese calcium carbide TIA assistant director eldest grandson Wan Jun the 4th calcium carbide industry sound development forum and calcium carbide industry technical conferences being read out has following content statement in the middle of literary composition: " comprehensive energy consumption of current electrothermal oven is generally 1.2 tons of mark coal/ton calcium carbides; its comprehensive energy consumption of oxygen method furnace of calcium carbide is 2.1 ~ 2.3 tons of mark coal/ton calcium carbides; higher than electrothermal oven, ".(3) Yu Haiming chief editor, in the middle content statement having " use calcium carbide slag making; easily produce carbide slag; cause carburetting for molten steel, and calcium carbide mainly using as diffusion deoxidizer in LF refining process " of works " furnace outer refining technology of converter molten steel " that 2011 publish in metallurgical industry press.
Known by the statement of these documents, calcium carbide is applied to steel-making, there is the negative impact that high in cost of production is many.
Summary of the invention
A kind of calcium carbonate carbon ball is the object of the present invention is to provide to be applied to the technique of LF steel-making, utilize Wingdale to substitute calcium carbide to be applied in LF process for making, play with calcium carbide effect same while, reduce the risk that calcium carbide uses, reduce the demand of metallurgy industry for calcium carbide, energy-saving and cost-reducing, reduce production cost.
The object of the present invention is achieved like this, and a kind of calcium carbonate carbon ball is applied to the technique of LF steel-making, is below 1mm, then mixes Wingdale abrasive dust with graphite carbon to granularity, and employing dry powder ball press is suppressed into calcium carbonate carbon ball;
Often produce 100kg calcium carbonate carbon ball, Wingdale add-on y is wherein:
y=83(100β-51)÷（83β-12γ）；
The add-on of graphite carbon is: 100-y;
In formula: β is the carbon content in graphite, %; γ is the content of calcium carbonate in Wingdale, %;
During converter smelting aluminium killed steel, according to the principle of equivalent substitution tradition calcium carbide add-on, add above calcium carbonate carbon ball, process for making traditionally uses.
Know-why of the present invention is based on following two innovative points:
1. by limestone crushing abrasive dust, in this course, after the mechanical energy of abrasive dust is applied to Wingdale, the reactive behavior ability of the calcium carbonate powders in the middle of Wingdale increases, after mixing with graphite carbon under the effect of powerful ball press, graphite carbon is combined with calcium carbonate again, the effect of mechanical energy by carbon and calcium carbonate compressed together, become the homogeneous mass of calcium carbonate and carbon, become the reductor that can substitute calcium carbide.Wherein the addition of Wingdale and the adding proportion calculation formula of carbon as follows:
Calcium carbide (CaC
2) the chemical quality percentage ratio of middle carbon is: [24 ÷ (23+24)] × 100%=51%
Calcium carbonate carbon ball in order to the function of calcium carbide can be realized, the carbon in the middle of calcium carbonate carbon ball account for calcium carbonate carbon ball mass percent should with calcium carbide in the middle of balance, therefore in the middle of 100kg calcium carbonate carbon ball, the add-on y of calcium carbonate is:
y=83(100β-51)÷（83β-12γ）
The add-on of graphite carbon is: 100-y
In formula: β is the carbon content of graphitized mesophase, %; γ is the content of calcium carbonate in the middle of Wingdale, %,
2. the calcium carbonate in the middle of Wingdale, can reaction decomposes rapidly in LF refining process, and the cracked small-particle that becomes participates in reaction directly, and reaction is wherein as follows:
CaCO
3 →CaO+CO
2↑
This reaction characteristics can have speed of response faster than calcium carbide, can optimize the technique of deoxygenation.And this reductor is the homogeneous mass of calcium carbonate and carbon, with molten steel or slag reaction process in reaction process, contacting the side of slag or molten steel, CO or CO that carbon reaction produces
2impel bloating in overflow process, add slag and molten steel, or the interface of slag and slag-metal reaction, and the CaO that Decomposition of Calcium Carbonate generates participates in slagging reaction, thus optimize the deoxidation in steel making technique of LF stove.Compared with calcium carbide, because the Decomposition of Calcium Carbonate in the middle of Wingdale needs to absorb heat, increase the power consumption smelted, but the rapid reaction of this reductor, can deaeration time be shortened, and CO or CO that reaction produces
2the foam slag burialing arc effect that foaming produces, effectively can reduce the electric arc heat energy radiation loss of LF stove, effect can reach balance with the result of use of calcium carbide.
Beneficial effect of the present invention is as follows:
1, the dependence of LF process for making for industrial calcium carbide can be reduced, be conducive to the enforcement of national environmental protection policy for the compression policy of high energy consumption industry.
2, the CaCO in the middle of Wingdale is utilized
3the CO produced in decomposition course
2effusion function, expands the interface of reaction, makes the deoxidation effect of LF stove and submerged arc effect be better than using the technique of calcium carbide, plays the technique object optimizing the steel-making of LF stove.
3, the cost of this explained hereafter is lower than the cost of calcium carbide by 30%, is conducive to the cost efficiency of steel-making enterprise.
4, this product is owing to using the mixture of calcium carbonate and graphite carbon, chemical reaction can not occur after wet, is convenient to transport and warehousing management, compared with use calcium carbide, in safety without any potential risk and Hazard Factor.
Embodiment
Embodiment below in conjunction with the calcium carbonate carbon ball of production 5 tons is described further invention.
1) 2.37 tons, local Wingdale is purchased, CaCO wherein
3content is 53%, and purchases the Graphite Powder 99 2.63 tons that local carbon content is 90%.
2) two kinds of raw materials are added crusher first broken, and then to be milled down to granularity in the middle of the Raymond mill be below 1mm, mix, add high-pressure ball press, suppress balling-up, then roping is stand-by to LF refining furnace station.
During converter smelting aluminium killed steel, according to the principle of equivalent substitution tradition calcium carbide add-on, add above calcium carbonate carbon ball, and process for making traditionally uses.
Claims (1)
1. calcium carbonate carbon ball is applied to a technique for LF steel-making, it is characterized in that: be below 1mm by Wingdale abrasive dust to granularity, and then mix with graphite carbon, employing dry powder ball press is suppressed into calcium carbonate carbon ball;
Often produce 100kg calcium carbonate carbon ball, Wingdale add-on y is wherein:
y=83(100β-51)÷（83β-12γ）；
The add-on of graphite carbon is: 100-y;
In formula: β is the carbon content in graphite, %; γ is the content of calcium carbonate in Wingdale, %;
During converter smelting aluminium killed steel, according to the principle of equivalent substitution tradition calcium carbide add-on, add above calcium carbonate carbon ball, process for making traditionally uses.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510125274.8A CN104726643B (en) | 2015-03-23 | 2015-03-23 | Process for applying calcium carbonate carbon spheres to LF (ladle furnace) steelmaking |
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| CN201510125274.8A CN104726643B (en) | 2015-03-23 | 2015-03-23 | Process for applying calcium carbonate carbon spheres to LF (ladle furnace) steelmaking |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177223A (en) * | 2015-08-25 | 2015-12-23 | 新疆中合大正商贸有限公司 | Process of using magnesia-calcium-carbon balls in LF steel making |
| CN105296707A (en) * | 2015-11-30 | 2016-02-03 | 新疆中合大正商贸有限公司 | Process of calcium carbonate carbon balls for converter or electric furnace steel tapping deoxidation |
| CN107161544A (en) * | 2017-06-05 | 2017-09-15 | 宝钢集团新疆八钢铁有限公司 | Sintered material is with addition of carbide slag device |
| CN109338041A (en) * | 2018-10-24 | 2019-02-15 | 河钢股份有限公司承德分公司 | A kind of lime stone is applied to the method for LF refining instead of calcium carbide |
| CN111394542A (en) * | 2020-05-06 | 2020-07-10 | 攀钢集团西昌钢钒有限公司 | Refining process of ultra-low carbon steel |
| CN111593169A (en) * | 2020-05-11 | 2020-08-28 | 山东邦巨实业有限公司 | Deoxidation process for electric furnace ladle |
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| CN1986838A (en) * | 2006-12-30 | 2007-06-27 | 李继宗 | Steel making lime additive and its production process |
| KR100885118B1 (en) * | 2002-11-14 | 2009-02-20 | 주식회사 포스코 | Converter working method of phosphorous added low carbon steel using ladle slag |
| CN102787210A (en) * | 2012-06-28 | 2012-11-21 | 辽宁中汇环保科技有限公司 | Calcareous premelted composite deoxidation and desulfurization agent for low-cost steel-making and method for preparing same |
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2015
- 2015-03-23 CN CN201510125274.8A patent/CN104726643B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100885118B1 (en) * | 2002-11-14 | 2009-02-20 | 주식회사 포스코 | Converter working method of phosphorous added low carbon steel using ladle slag |
| CN1986838A (en) * | 2006-12-30 | 2007-06-27 | 李继宗 | Steel making lime additive and its production process |
| CN102787210A (en) * | 2012-06-28 | 2012-11-21 | 辽宁中汇环保科技有限公司 | Calcareous premelted composite deoxidation and desulfurization agent for low-cost steel-making and method for preparing same |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177223A (en) * | 2015-08-25 | 2015-12-23 | 新疆中合大正商贸有限公司 | Process of using magnesia-calcium-carbon balls in LF steel making |
| CN105177223B (en) * | 2015-08-25 | 2017-06-30 | 新疆中合大正商贸有限公司 | The technique that a kind of magnesium calcium carbon ball is used for LF steel-making |
| CN105296707A (en) * | 2015-11-30 | 2016-02-03 | 新疆中合大正商贸有限公司 | Process of calcium carbonate carbon balls for converter or electric furnace steel tapping deoxidation |
| CN107161544A (en) * | 2017-06-05 | 2017-09-15 | 宝钢集团新疆八钢铁有限公司 | Sintered material is with addition of carbide slag device |
| CN109338041A (en) * | 2018-10-24 | 2019-02-15 | 河钢股份有限公司承德分公司 | A kind of lime stone is applied to the method for LF refining instead of calcium carbide |
| CN111394542A (en) * | 2020-05-06 | 2020-07-10 | 攀钢集团西昌钢钒有限公司 | Refining process of ultra-low carbon steel |
| CN111593169A (en) * | 2020-05-11 | 2020-08-28 | 山东邦巨实业有限公司 | Deoxidation process for electric furnace ladle |
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|---|---|
| CN104726643B (en) | 2020-12-18 |
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