CN104694706A - Application process of calcium oxide carbon balls to LF steel-making - Google Patents
Application process of calcium oxide carbon balls to LF steel-making Download PDFInfo
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- CN104694706A CN104694706A CN201510125327.6A CN201510125327A CN104694706A CN 104694706 A CN104694706 A CN 104694706A CN 201510125327 A CN201510125327 A CN 201510125327A CN 104694706 A CN104694706 A CN 104694706A
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Abstract
The invention discloses an application process of calcium oxide carbon balls to LF steel-making; the process comprises the steps: grinding lime to be 0.5-1mm in particle size; uniformly mixing with graphite carbon, wherein the particle size of the graphite carbon is ground to be below 0.5mm by means of a ball mill; pressing uniformly mixed lime and graphite carbon into calcium oxide carbon balls in use of a dry powder ball press machine, and utilizing the balls to replace calcium carbide in the LF steel-making process. When 100kg of calcium oxide carbon balls are produced, the adding amount y of lime is y=51/Beta and the adding amount of the graphite carbon is 100-y; in the formula, Beta is the carbon content (percentage) in graphite.
Description
Technical field
The present invention relates to process for making, particularly a kind of calcium oxide carbon ball is applied to the technique of LF steel-making.
Background technology
In tradition steelmaking process, after using the technique order of calcium carbide steel-making mainly to utilize carbide of calcium wherein to decompose, the oxygen in the middle of carbon wherein and molten steel or slag or oxide compound reacts, play the technique object of minimizing molten steel or the middle oxygen level of 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 steel-making uses calcium carbide deoxidation 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 oxide 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, a kind of calcium oxide carbon ball is applied to the technique of LF steel-making, be between 0.5mm ~ 1mm by lime abrasive dust to granularity, then mix with graphite carbon, wherein the granularity of graphite carbon dust adopts ball mill to be ground into below 0.5mm, adopt dry powder ball press that the lime of mixing and graphite carbon are suppressed into calcium oxide carbon ball, substitute calcium carbide and be applied in LF process for making process; Often produce 100kg calcium oxide carbon ball, wherein the add-on y of lime is:
y=51÷β
The add-on of graphite carbon is: 100-y;
In formula: β is the carbon content in graphite, %.
Know-why of the present invention is based on following two innovative points:
1. the lime (CaO) that shaft furnace or rotary kiln are produced belongs to porous mass, and the easy moisture absorption lost efficacy.Between broken for lime abrasive dust to 0.5mm ~ 1mm; in this course; after the mechanical energy of abrasive dust is applied to lime; the reactive behavior ability of the lime powder in the middle of lime increases; in order to prevent the moisture absorption of lime powder to lose efficacy, granularity being mixed at the graphite carbon powder of below 0.5mm and lime particle, using high pressure dry powder ball press pelletizing; be suppressed into the pelletizing that fine powder closes calcium oxide surface pores, make it to become the reductor that can prevent the moisture absorption from reacting.Become the reductor that can substitute calcium carbide.Wherein the addition of lime 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 oxide carbon ball in order to the function of calcium carbide can be realized, the carbon in the middle of calcium oxide carbon ball, account for calcium oxide carbon ball mass percent should with equivalent calcium carbide in the middle of balance, therefore the add-on y of 100kg calcium oxide carbon ball intermediate oxidation calcium is:
y=51÷β
The add-on of graphite carbon is: 100-y
In formula: β is the carbon content of graphitized mesophase, %;
2. the carbon in the middle of lime, with molten steel or slag reaction process in reaction process, is contacting the side of slag or molten steel, CO or CO that carbon direct reaction produces
2impel bloating in overflow process, add slag and molten steel, or the interface of slag and slag-metal reaction, the speed that CaO participates in slagging reaction is accelerated, thus optimizes the deoxidation in steel making technique of LF stove.Compared with calcium carbide, first calcium carbide is decomposition reaction, is then deoxygenation, therefore 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, power savings is better than 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 cost of this explained hereafter is lower than the cost of calcium carbide by 40%, is conducive to the cost efficiency of steel-making enterprise.
3, this product is owing to using the mixture of lime and graphite carbon, can not produce acetylene gas after wet, is convenient to transport and warehousing management, compared with use calcium carbide, and the potential risk of safety not being exploded and burning and Hazard Factor.
Embodiment
Embodiment below in conjunction with the calcium oxide carbon ball of production 5 tons is described further invention.
1) purchase 2.74 tons, local lime, CaO content is wherein 93%, and purchases the Graphite Powder 99 2.26 tons that local carbon content is 90%.
2) two kinds of raw materials are added crusher first broken, the Task-size Controlling of lime fragmentation is between 0.5mm ~ 1mm, and graphite carbon dust is milled down to below 0.5mm in the middle of Raymond mill, mixed, add high-pressure ball press, compacting 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 dexidizing slag ball, and process for making traditionally uses.
Claims (1)
1. a calcium oxide carbon ball is applied to the technique of LF steel-making, to it is characterized in that lime abrasive dust to granularity being between 0.5mm ~ 1mm, then mix with graphite carbon, wherein the granularity of graphite carbon dust adopts ball mill to be ground into below 0.5mm, adopt dry powder ball press that the lime of mixing and graphite carbon are suppressed into calcium oxide carbon ball, substitute calcium carbide and be applied in LF process for making process; Often produce 100kg calcium oxide carbon ball, wherein the add-on y of lime is:
y=51÷β
The add-on of graphite carbon is: 100-y;
In formula: β is the carbon content in graphite, %.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510125327.6A CN104694706A (en) | 2015-03-23 | 2015-03-23 | Application process of calcium oxide carbon balls to LF steel-making |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510125327.6A CN104694706A (en) | 2015-03-23 | 2015-03-23 | Application process of calcium oxide carbon balls to LF steel-making |
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| CN104694706A true CN104694706A (en) | 2015-06-10 |
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| CN201510125327.6A Pending CN104694706A (en) | 2015-03-23 | 2015-03-23 | Application process of calcium oxide carbon balls to LF steel-making |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946853A (en) * | 2015-07-15 | 2015-09-30 | 中冶华天南京工程技术有限公司 | Metallurgy lime powder utilization system and technology method |
| 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 |
| 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 |
| CN110331255A (en) * | 2019-08-09 | 2019-10-15 | 王强 | A kind of precipitation desoxydation method of carbon aluminium-killed steel |
| CN111334643A (en) * | 2020-03-20 | 2020-06-26 | 广西贵港钢铁集团有限公司 | Deoxidizing and slagging material for steelmaking, preparation method and use method thereof |
| CN111593169A (en) * | 2020-05-11 | 2020-08-28 | 山东邦巨实业有限公司 | Deoxidation process for electric furnace ladle |
| CN111979423A (en) * | 2019-05-24 | 2020-11-24 | 中南大学 | Method for reinforced recovery of valuable metals in copper smelting slag by using gypsum slag |
| CN114934153A (en) * | 2022-05-07 | 2022-08-23 | 新疆中合大正商贸有限公司 | Method for producing HRB400 high-efficiency desulfurizer and extracting lithium by using carbon slag and aluminum ash |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986838A (en) * | 2006-12-30 | 2007-06-27 | 李继宗 | Steel making lime additive and its production process |
-
2015
- 2015-03-23 CN CN201510125327.6A patent/CN104694706A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986838A (en) * | 2006-12-30 | 2007-06-27 | 李继宗 | Steel making lime additive and its production process |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946853A (en) * | 2015-07-15 | 2015-09-30 | 中冶华天南京工程技术有限公司 | Metallurgy lime powder utilization system and technology method |
| 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 |
| 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 |
| CN111979423A (en) * | 2019-05-24 | 2020-11-24 | 中南大学 | Method for reinforced recovery of valuable metals in copper smelting slag by using gypsum slag |
| CN111979423B (en) * | 2019-05-24 | 2021-09-03 | 中南大学 | Method for reinforced recovery of valuable metals in copper smelting slag by using gypsum slag |
| CN110331255A (en) * | 2019-08-09 | 2019-10-15 | 王强 | A kind of precipitation desoxydation method of carbon aluminium-killed steel |
| CN110331255B (en) * | 2019-08-09 | 2020-11-20 | 王强 | Precipitation deoxidation method of low-carbon aluminum killed steel |
| CN111334643A (en) * | 2020-03-20 | 2020-06-26 | 广西贵港钢铁集团有限公司 | Deoxidizing and slagging material for steelmaking, preparation method and use method thereof |
| CN111593169A (en) * | 2020-05-11 | 2020-08-28 | 山东邦巨实业有限公司 | Deoxidation process for electric furnace ladle |
| CN114934153A (en) * | 2022-05-07 | 2022-08-23 | 新疆中合大正商贸有限公司 | Method for producing HRB400 high-efficiency desulfurizer and extracting lithium by using carbon slag and aluminum ash |
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