CN105132620A - Cost-reducing steelmaking method - Google Patents
Cost-reducing steelmaking method Download PDFInfo
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- CN105132620A CN105132620A CN201510572908.4A CN201510572908A CN105132620A CN 105132620 A CN105132620 A CN 105132620A CN 201510572908 A CN201510572908 A CN 201510572908A CN 105132620 A CN105132620 A CN 105132620A
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- cost
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- saving method
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to the technical field of steelmaking and particularly relates to a cost-reducing steelmaking method. The cost-reducing steelmaking method comprises the following steps of sequentially adding molten iron and waste steel into an electric furnace according to the weight ratio of 7:3; after ending the charging operation, blowing by using a furnace door lance and adding a slag forming material into the electric furnace to form slag; and when the temperature and components of the molten iron in the electric furnace meet the requirements of a steel grade, dumping the furnace and tapping. Compared with the prior art, the cost-reducing steelmaking method has the beneficial effects of reducing power consumption, electrode consumption and waste steel cost, increasing the yield of the steel material and further achieving the aim of reducing the cost.
Description
Technical field
The present invention relates to steelmaking technical field, specifically a kind of cost-saving method for making steel.
Background technology
Along with the development of Electric Furnace Steelmaking, the particularly development of uhp electric arc furnace and correlation technique, secondary refining and continuous casting technology and widespread use, the Electric furnace steel making productivity of China is increased substantially, meanwhile, there is critical shortage in the scrap resources of China, and China's electricity price is expensive, these become the key factor of restriction China Electric furnace steel making development.Molten iron is the good substitute of steel scrap, directly supplies liquid iron charging electric furnace by blast furnace, replaces the preferred option that part steel scrap just becomes many electric furnace steel mills, can effectively reduce production cost, reduces power consumption, shortens smelting cycle, improve steel quality.Application publication number is that the application for a patent for invention of CN102534112A discloses a kind of total-converting steelmaking method of electric furnace, in the method, in charging stock for electric furnace, molten iron accounts for 71% ~ 79% of gross weight, steel scrap accounts for 21% ~ 29% of gross weight, although the method has the advantage of saving power consumption, reducing export license, reducing steel scrap cost, but iron and steel stock yield is lower, and cost is higher.
Summary of the invention
The object of the invention is, in order to solve above-mentioned the deficiencies in the prior art, to provide a kind of technical scheme of cost-saving method for making steel, power consumption can be saved, reduce export license, reduce steel scrap cost, iron and steel stock yield can also be improved.
Technical problem to be solved by this invention realizes by the following technical solutions: a kind of cost-saving method for making steel, comprise the following steps: molten iron and steel scrap are added electric furnace successively according to the weight ratio of 7:3, after reinforced, use furnace door oxygen lance blowing and add slag material slag making in electric furnace, when molten steel in electric furnace reaches the temperature required and composition of steel grade, turn over stove tapping.
Technical scheme of the present invention also has: tap to tap time is 2 ~ 2.5 hours, ensures at the bottom of sintering oven.
Technical scheme of the present invention also has: the Si content in described molten iron is not less than 0.6%.Adopt the technical program, can provide at the bottom of enough heat sintering oven.
Technical scheme of the present invention also has: described molten iron adds in electric furnace by fire door, does not need to open bell, can improve production efficiency, decreases wearing and tearing and the molten iron splashing waste of bell rotary frame.
Technical scheme of the present invention also has: described furnace door oxygen lance is top-blown oxygen rifle.
Technical scheme of the present invention also has: the maximum oxygen-supplying amount of described furnace door oxygen lance is 3000Nm
3/ h.
Technical scheme of the present invention also has: the nozzle of described furnace door oxygen lance and the distance of liquid steel level are one meter, and the nozzle of furnace door oxygen lance and the angle of liquid steel level are 45 °.
Technical scheme of the present invention also has: at least produce five stoves according to the method.
Relative to prior art, the beneficial effect of the method for making steel that the present invention is cost-saving is: can save power consumption, reduce export license, reduce steel scrap cost, can also improve iron and steel stock yield, thus reach cost-saving object.
Embodiment
Below in conjunction with a preferred embodiment, technical scheme of the present invention is described further.
A kind of cost-saving method for making steel, comprise the following steps: molten iron and steel scrap are added electric furnace successively according to the weight ratio of 7:3, after reinforced, use furnace door oxygen lance blowing and add slag material slag making in electric furnace, when molten steel in electric furnace reaches the temperature required and composition of steel grade, turn over stove tapping.
Tap to tap time is 2 ~ 2.5 hours, ensures at the bottom of sintering oven.
Si content in described molten iron is not less than 0.6%.
Described molten iron is added in electric furnace by fire door.
Described furnace door oxygen lance is top-blown oxygen rifle.
The maximum oxygen-supplying amount of described furnace door oxygen lance is 3000Nm
3/ h.
The nozzle of described furnace door oxygen lance and the distance of liquid steel level are one meter, and the nozzle of furnace door oxygen lance and the angle of liquid steel level are 45 °.
Five stoves are at least produced according to the method.
Can be found out by upper table, can effectively improve iron and steel stock yield when the weight ratio of molten iron and steel scrap is 7:3.
Above embodiments of the invention are elaborated, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, can also makes a variety of changes under the prerequisite not departing from present inventive concept.
Claims (8)
1. a cost-saving method for making steel, comprises the following steps:
Molten iron and steel scrap are added electric furnace successively according to the weight ratio of 7:3, after reinforced, uses furnace door oxygen lance blowing also in electric furnace, to add slag material slag making, when molten steel in electric furnace reaches the temperature required and composition of steel grade, turn over stove tapping.
2. cost-saving method for making steel according to claim 1, is characterized in that: tap to tap time is 2 ~ 2.5 hours.
3. cost-saving method for making steel according to claim 1, is characterized in that: the Si content in described molten iron is not less than 0.6%.
4., according to the arbitrary described cost-saving method for making steel of claim 1 ~ 3, it is characterized in that: described molten iron is added in electric furnace by fire door.
5., according to the arbitrary described cost-saving method for making steel of claim 1 ~ 3, it is characterized in that: described furnace door oxygen lance is top-blown oxygen rifle.
6., according to the arbitrary described cost-saving method for making steel of claim 1 ~ 3, it is characterized in that: the maximum oxygen-supplying amount of described furnace door oxygen lance is 3000Nm
3/ h.
7., according to the arbitrary described cost-saving method for making steel of claim 1 ~ 3, it is characterized in that: the nozzle of described furnace door oxygen lance and the distance of liquid steel level are one meter, the nozzle of furnace door oxygen lance and the angle of liquid steel level are 45 °.
8. cost-saving method for making steel according to claim 7, is characterized in that: at least produce five stoves according to the method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510572908.4A CN105132620A (en) | 2015-09-10 | 2015-09-10 | Cost-reducing steelmaking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510572908.4A CN105132620A (en) | 2015-09-10 | 2015-09-10 | Cost-reducing steelmaking method |
Publications (1)
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| CN105132620A true CN105132620A (en) | 2015-12-09 |
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| CN201510572908.4A Pending CN105132620A (en) | 2015-09-10 | 2015-09-10 | Cost-reducing steelmaking method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1598000A (en) * | 2004-07-27 | 2005-03-23 | 南京钢铁联合有限公司 | Production technology for melting steel by electric arc furnace converter |
| CN101580912A (en) * | 2009-06-19 | 2009-11-18 | 武汉钢铁(集团)公司 | Low carbon high sulfur free-cutting steel production process |
| CN102534112A (en) * | 2012-02-01 | 2012-07-04 | 江苏省沙钢钢铁研究院有限公司 | Total-converting steelmaking method of electric furnace |
| CN103205529A (en) * | 2013-03-29 | 2013-07-17 | 江苏省沙钢钢铁研究院有限公司 | Zero-power consumption steel-making method using electric-arc furnace |
| CN103276153A (en) * | 2013-05-16 | 2013-09-04 | 武汉钢铁(集团)公司 | Method for reducing nitrogen content of welding steel wire rod |
| KR20150014030A (en) * | 2013-07-26 | 2015-02-06 | 현대제철 주식회사 | Method for manufacturing steel by electric furnace steelmaking |
-
2015
- 2015-09-10 CN CN201510572908.4A patent/CN105132620A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1598000A (en) * | 2004-07-27 | 2005-03-23 | 南京钢铁联合有限公司 | Production technology for melting steel by electric arc furnace converter |
| CN101580912A (en) * | 2009-06-19 | 2009-11-18 | 武汉钢铁(集团)公司 | Low carbon high sulfur free-cutting steel production process |
| CN102534112A (en) * | 2012-02-01 | 2012-07-04 | 江苏省沙钢钢铁研究院有限公司 | Total-converting steelmaking method of electric furnace |
| CN103205529A (en) * | 2013-03-29 | 2013-07-17 | 江苏省沙钢钢铁研究院有限公司 | Zero-power consumption steel-making method using electric-arc furnace |
| CN103276153A (en) * | 2013-05-16 | 2013-09-04 | 武汉钢铁(集团)公司 | Method for reducing nitrogen content of welding steel wire rod |
| KR20150014030A (en) * | 2013-07-26 | 2015-02-06 | 현대제철 주식회사 | Method for manufacturing steel by electric furnace steelmaking |
Non-Patent Citations (2)
| Title |
|---|
| 孙开明 等: "现代电弧炉炼钢热装铁水技术的再认识", 《北京科技大学学报》 * |
| 陆宏祖 等: "《电炉炼钢问答》", 31 March 2012, 冶金工业出版社 * |
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Application publication date: 20151209 |