CN103642971A - Method for improving steelmaking end-point carbon content of semisteel and semisteel steelmaking method - Google Patents

Method for improving steelmaking end-point carbon content of semisteel and semisteel steelmaking method Download PDF

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CN103642971A
CN103642971A CN201310571398.XA CN201310571398A CN103642971A CN 103642971 A CN103642971 A CN 103642971A CN 201310571398 A CN201310571398 A CN 201310571398A CN 103642971 A CN103642971 A CN 103642971A
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steel
making
carbon content
blowing
converter
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CN103642971B (en
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王建
陈炼
陈永
戈文荪
曾建华
杜利华
蒋龙奎
黄德胜
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Pangang Group Research Institute Co Ltd
Pangang Group Panzhihua Steel and Vanadium Co Ltd
Pangang Group Xichang Steel and Vanadium Co Ltd
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Pangang Group Research Institute Co Ltd
Pangang Group Panzhihua Steel and Vanadium Co Ltd
Pangang Group Xichang Steel and Vanadium Co Ltd
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Abstract

The invention provides a method for improving the steelmaking end-point carbon content of semisteel and a semisteel steelmaking method. The method comprises: during tapping of semisteel to a ladle, adding 1.5-6.0kg/(t semisteel) ferrosilicon into the ladle; then adding the semisteel into a steelmaking furnace, putting an oxygen lance into the furnace to perform oxygen blowing smelting, and adding related slag making materials and alloys according to blowing requirements, conducting carbon drawing, then performing reblowing according to the carbon content, controlling the end-point carbon content of molten steel at 0.10%-0.20%, taking out the oxygen lance, and stopping blowing. Specifically, the semisteel is molten steel obtained by subjecting vanadium-containing molten steel to a vanadium recovery converter or dephosphorization converter to undergo blowing, and by weight, has a C content of 3.20%-3.80% and an Si content of 0.001%-0.05%. The method provided by the invention can shorten the initial slag forming time, improve the steelmaking and slagging speed, can enhance the molten steel temperature, can effectively control the steel material consumption in the steelmaking process, and can avoid the low utilization problem of carbon recarburization materials.

Description

Improve method and the Semi-steel making method of semi-steel making endpoint carbon content
Technical field
The invention belongs to semi-steel making technical field, specifically, relate to a kind of Semi-steel making method that improves the method for semi-steel making endpoint carbon content and adopt the method for this raising semi-steel making endpoint carbon content.
Background technology
Generally, for example, by (containing vanadium iron ore deposit, vanadium titano-magnetite) vanadium-bearing hot metal obtaining after blast-furnace smelting is after converter extracting vanadium or dephosphorization converter smelting, obtain half steel, the feature of this half steel is carbon low (on average in 3.6% left and right), silicon low (below 0.01%), manganese low (below 0.05%), heat source insufficiency, slagging constituent content are low, and temperature is high compared with molten iron, and slag oxidisability in early stage is lower and initial stage slagging is more difficult.When adopting this half steel to smelt, because heating element in half steel is fewer than molten iron, for carrying out smoothly of guaranteeing to smelt, also need to add temperature raising agent to supplement heat content.In addition, the raising of molten iron temperature, can also increase adding of steel scrap amount, reduces steel making working procedure iron and steel stock consumption, thereby reduces converter energy consumption.
Prior art mainly concentrates on four aspects substantially, the one, half steel come out of the stove or half steel production process in add carburelant, to improve carbon content of molten steel, thereby reduce the problem of half steel heat source insufficiency, but the carbon recovery rate of this method is lower; The 2nd, by add carburelant in converting process, by carburelant, be oxidized to improve liquid steel temperature, same, the recovery rate of present method carbon is also low; The 3rd, by molten steel is blown to temperature raising deeply, then require with addition of carburelant according to steel grade, this method can cause that molten steel terminal oxygen activity is high, deoxygenated alloy consumption large, iron and steel stock consumption increases; The 4th, blowing molten steel, to requiring composition, heats to improve liquid steel temperature by LF stove, and this method power consumption is high, process flow lengthens.
Application number is that the patent documentation of CN93107206.9 discloses a kind of method for making steel, and the method is used solid iron metalloid material as the reinforced major portion of metal and utilized two kinds of dissimilar carbonaceous materials and heat that steel scrap burning is emitted.The volatilizable hydrocarbons content of one of carbonaceous material is high, its effect is to make the material preheating of iron class partial melting, hydrocarbons content that another carbonaceous material is volatilizable is low and provide reducing power for melt carburetting, and provide additional heat by burning, for strengthening the heating and melting of solid iron class material.Present method also comprises and is blown into oxygen-rich oxide gas, for the burning of carbonaceous material hydrocarbon polymer with fusing the formed melting materials capable of refining.Application number is that the patent documentation of CN201110427130.X discloses a kind of method for making steel and application and a kind of continuous cast method, and (1) is used converter to carry out just refining, then the molten steel that just refining obtains is tapped in ladle; (2) in tapping process, before carrying out alloying, molten steel is carried out carburetting and carries out selectivity deoxidation, making to take the gross weight of molten steel is benchmark, the activity oxygen level of molten steel is≤100ppm.Application number is that the patent documentation of CN200910211433.0 discloses a kind of deoxidation of molten steel carburetion method and method for making steel, this method for making steel comprises that the molten steel that smelting is obtained taps in ladle, and in tapping process, molten steel is carried out to deoxidation carburetting, and then the molten steel obtaining after deoxidation carburetting is carried out to external refining, wherein, the described method that molten steel is carried out to deoxidation carburetting is deoxidation of molten steel carburetion method of the present invention.In described deoxidation carburetion method, first add carburelant, when adjusting carbon content, make carburelant react the spontaneous stirring gas of generation with the oxygen in molten steel.The reductor adding subsequently under the stirring action of spontaneous stirring gas can with molten steel fully, mix equably, thereby obtain temperature, composition evenly and meet the molten steel of refining requirement, for next step operation has been created good condition.Application number is that the patent documentation of CN02122532.X discloses a kind of method for making steel with molten iron as carburant, the method is the online hot metal charging device utilizing with metering and baking, lagging facility, the molten iron of precalculated consumption is blended into ladle, then the method for the ladle carburetting of tapping.Application number is the method for making steel that the patent documentation of CN201010215297.5 discloses a kind of carbon manganese alloy material and its preparation method and application this material, the method adopts its carbon manganese alloy material stably to molten steel, to carry out carburetting or to increase manganese, solved the problem that steel grades is unstable, qualification rate is low of smelting, the rate of recovery of carbon and manganese is high and stable, and the rate of recovery of carbon and manganese all can stably be controlled between 90-96 % by weight.
From above-mentioned prior art, the present invention yet there are no report, still belongs to precedent.
Summary of the invention
The object of the invention is to solve at least one in the deficiency that above-mentioned prior art exists.
For example, one of object of the present invention is to solve the problem that steelworks semi-steel making physical temperature is poor, endpoint carbon content is low, and a kind of method that improves semi-steel making endpoint carbon content is provided.
An aspect of of the present present invention provides a kind of method that improves semi-steel making endpoint carbon content.Said method comprising the steps of: in ladle, going out in the process of half steel, the ferrosilicon of 1.5~6.0kg/ (t half steel) is joined in ladle; Then half steel is blended in steel melting furnace, lower oxygen gun blowing is smelted and is added relevant slag making materials and alloy by blowing requirement, after catch carbon, according to carbon content, re-blow, molten steel endpoint carbon content is controlled to 0.10%~0.20%, carry oxygen and go out rifle, stop blowing, wherein, described half steel is the molten steel of vanadium-bearing hot metal after converter extracting vanadium or dephosphorization converter finishing blowing, and wherein contains 3.20%~3.80% C, 0.001%~0.05% Si by weight percentage.
Another aspect of the present invention provides a kind of method that improves semi-steel making endpoint carbon content.Said method comprising the steps of: half steel is blended into after steel-making converter, the ferrosilicon of 1~5kg/ (t half steel) is joined in steel-making converter; Then descend oxygen gun blowing to smelt and add relevant slag making materials and alloy by blowing requirement, after catch carbon, according to carbon content, re-blowing, molten steel endpoint carbon content is controlled to 0.10%~0.20%, carrying oxygen and go out rifle, stopping blowing.
Another aspect of the present invention provides a kind of method that improves semi-steel making endpoint carbon content.Said method comprising the steps of: half steel is blended into after steel-making converter, and lower oxygen gun blowing is smelted after 0.5~1min, the ferrosilicon of 1~5kg/ (t half steel) is joined in steel-making converter, by blowing requirement, add relevant slag making materials and alloy simultaneously; After catch carbon, according to carbon content, re-blow, molten steel endpoint carbon content is controlled to 0.10%~0.20%, carry oxygen and go out rifle, stop blowing.
Another aspect of the present invention provides a kind of Semi-steel making method.Described Semi-steel making method comprises the carbon content that adopts the method for raising semi-steel making endpoint carbon content as above to improve endpoint molten steel.
Compared with prior art, beneficial effect of the present invention comprises: can shorten initial stage slag formation time, improve steelmaking slagging speed; Can improve liquid steel temperature; Can effectively control the consumption of steelmaking process iron and steel stock; Can avoid the low problem of carbonaceous carburetting material use efficiency.
Embodiment
Hereinafter, in connection with exemplary embodiment, describe method and the Semi-steel making method of raising semi-steel making endpoint carbon content of the present invention in detail.
In one exemplary embodiment of the present invention, the method that improves semi-steel making endpoint carbon content can comprise the following steps: in ladle, going out in the process of half steel, the ferrosilicon of 1.5~6.0kg/ (t half steel) is joined in ladle; Then half steel is blended in steel melting furnace, lower oxygen gun blowing is smelted and is added relevant slag making materials and alloy by blowing requirement, after catch carbon, according to carbon content, re-blow, molten steel endpoint carbon content is controlled to 0.10%~0.20%, propose oxygen rifle, stop blowing, wherein, described half steel is the molten steel of vanadium-bearing hot metal after converter extracting vanadium or dephosphorization converter finishing blowing, and wherein contains 3.20%~3.80% C, 0.001%~0.05% Si by weight percentage.Preferably, in the method for this exemplary embodiment, the add-on of ferrosilicon can be the ferrosilicon of 2.2~4.5kg/ (t half steel).In addition, in this exemplary embodiment, the temperature of half steel is 1320 ℃~1380 ℃, and the add-on of ferrosilicon can determine according to half steel temperature, and half steel temperature more low-silicon iron add-on is also just fewer.
In another exemplary embodiment of the present invention, the method that improves semi-steel making endpoint carbon content can comprise the following steps: half steel is blended into after steel-making converter, the ferrosilicon of 1~5kg/ (t half steel) is joined in steel-making converter; Then descend oxygen gun blowing to smelt and add relevant slag making materials and alloy by blowing requirement, after catch carbon, according to carbon content, re-blow, molten steel endpoint carbon content is controlled to 0.10%~0.20%, oxygen rifle is proposed, stop blowing, wherein, described in be blended into steel-making converter half steel be the molten iron that vanadium-bearing hot metal obtains after vanadium extraction, and wherein contain 3.20%~3.80% C, 0.001%~0.05% Si by weight percentage.Preferably, in the method for this exemplary embodiment, the add-on of ferrosilicon can be the ferrosilicon of 2.2~4.5kg/ (t half steel).In addition, in this exemplary embodiment, the temperature of half steel is 1320 ℃~1380 ℃, and the add-on of ferrosilicon can determine according to half steel temperature, and half steel temperature more low-silicon iron add-on is also just fewer.
In another exemplary embodiment of the present invention, the method that improves semi-steel making endpoint carbon content can comprise the following steps: half steel is blended into after steel-making converter, lower oxygen gun blowing is smelted after 0.5~1min, the ferrosilicon of 1~5kg/ (t half steel) is joined in steel-making converter, by blowing requirement, add relevant slag making materials and alloy simultaneously; After catch carbon, according to carbon content, re-blow, molten steel endpoint carbon content is controlled to 0.10%~0.20%, oxygen rifle is proposed, stop blowing, wherein, the described half steel that is blended into steel-making converter is the molten iron that vanadium-bearing hot metal obtains after vanadium extraction, and wherein contains 3.20%~3.80% C, 0.001%~0.05% Si by weight percentage.Preferably, in the method for this exemplary embodiment, the add-on of ferrosilicon can be the ferrosilicon of 2.2~4.5kg/ (t half steel).In addition, in this exemplary embodiment, the temperature of half steel is 1320 ℃~1380 ℃, and the add-on of ferrosilicon can determine according to half steel temperature, and half steel temperature more low-silicon iron add-on is also just fewer.
In the method for raising semi-steel making endpoint carbon content of the present invention, relevant slag making materials and alloy can be lime, high magnesium lime, composite fluxing medium and steel-making alloy, wherein, contain SiO in composite fluxing medium 216%~20%, the CaO of Mn10%~15% and surplus.The add-on of relevant slag making materials and alloy can add according to steel-making requirements.In the method for raising semi-steel making endpoint carbon content of the present invention, ferrosilicon can contain more than 75% Si by weight percentage.
In another exemplary embodiment of the present invention, Semi-steel making method comprises the carbon content that adopts the method for raising semi-steel making endpoint carbon content as above to improve endpoint molten steel.
Description exemplary embodiment of the present invention below in conjunction with concrete illustrating property of example.
Example 1
In this example, half steel is the molten steel of vanadium-bearing hot metal after converter extracting vanadium finishing blowing, and wherein contains 3.52% C, 0.01% Si by weight percentage.
In ladle, going out in the process of half steel, the ferrosilicon of 1.5kg/ (t half steel) is being joined in ladle; Then half steel is blended in steel melting furnace, lime, 15kg/ (t half steel) high magnesium lime, 1kg/ (t half steel) composite fluxing medium of 35kg/ (t half steel) smelted and added to lower oxygen gun blowing, initial stage slag formation time 2.2min, until liquid steel temperature, reach after 1650 ℃, propose oxygen rifle, stop blowing.The carbon content that obtains molten steel is 0.11%, and the consumption of ton steel iron and steel stock is 1050kg.
Example 2
In this example, half steel is the molten steel of vanadium-bearing hot metal after converter extracting vanadium finishing blowing, and wherein contains 3.47% C, 0.01% Si by weight percentage.
In ladle, going out in the process of half steel, the ferrosilicon of 6kg/ (t half steel) is being joined in ladle; Then half steel is blended in steel melting furnace, lime, 10kg/ (t half steel) high magnesium lime of 36kg/ (t half steel) smelted and added to lower oxygen gun blowing, and initial stage slag formation time 2.6min, reaches after 1680 ℃ until liquid steel temperature, proposes oxygen rifle, stops blowing.The carbon content that obtains molten steel is 0.19%, and the consumption of ton steel iron and steel stock is 1051kg.
Example 3
In this example, half steel is the molten steel of vanadium-bearing hot metal after converter extracting vanadium finishing blowing, and wherein contains 3.55% C, 0.02% Si by weight percentage.
Half steel is blended into after steel-making converter, the ferrosilicon of 1.5kg/ (t half steel) is joined in steel-making converter; Then descend oxygen gun blowing to smelt and add the lime of 32kg/ (t half steel), 13kg/ (t half steel) high magnesium lime, initial stage slag formation time 3.1min, reaches after 1670 ℃ until liquid steel temperature, proposes oxygen rifle, stops blowing.The carbon content that obtains molten steel is 0.16%, and the consumption of ton steel iron and steel stock is 1049kg.
Example 4
In this example, half steel is the molten steel of vanadium-bearing hot metal after converter extracting vanadium finishing blowing, and wherein contains 3.72% C, 0.03% Si by weight percentage.
Half steel is blended into after steel-making converter, the ferrosilicon of 6kg/ (t half steel) is joined in steel-making converter; Then descend oxygen gun blowing to smelt and add the lime of 41kg/ (t half steel), 16kg/ (t half steel) high magnesium lime, initial stage slag formation time 3.5min, reaches after 1675 ℃ until liquid steel temperature, proposes oxygen rifle, stops blowing.The carbon content that obtains molten steel is 0.20%, and the consumption of ton steel iron and steel stock is 1053kg.
Example 5
In this example, half steel is the molten steel of vanadium-bearing hot metal after converter extracting vanadium finishing blowing, and wherein contains 3.55% C, 0.02% Si by weight percentage.
Half steel is blended into after steel-making converter, and lower oxygen gun blowing is smelted after 1min, and the ferrosilicon of 1.5kg/ (t half steel) is joined in steel-making converter; The lime, 12kg/ (t half steel) high magnesium lime that add 38kg/ (t half steel), initial stage slag formation time 2.5min, re-blows after catch carbon to liquid steel temperature and reaches after 1665 ℃, proposes oxygen rifle, stops blowing simultaneously.The carbon content that obtains molten steel is 0.11%, and the consumption of ton steel iron and steel stock is 1048kg.
Example 6
In this example, half steel is the molten steel of vanadium-bearing hot metal after converter extracting vanadium finishing blowing, and wherein contains 3.45% C, 0.01% Si by weight percentage.
Half steel is blended into after steel-making converter, and lower oxygen gun blowing is smelted after 1min, and the ferrosilicon of 6kg/ (t half steel) is joined in steel-making converter; The lime, 13kg/ (t half steel) high magnesium lime that add 37kg/ (t half steel), initial stage slag formation time 3min, re-blows after catch carbon to liquid steel temperature and reaches after 1650 ℃, proposes oxygen rifle, stops blowing simultaneously.The carbon content that obtains molten steel is 0.018%, and the consumption of ton steel iron and steel stock is 1049kg.
The present invention can effectively solve the problem that steelworks semi-steel making physical temperature is poor, endpoint carbon content is low; Can increase the heat-transmission of steelmaking process elemental oxygen, liquid steel temperature is controlled in claimed range, reduce the oxidation of carbon and iron in steel simultaneously, reduce iron and steel stock consumption, improve semi-steel making because of the problem of the few slag making difficulty of slagging element; Can, better promoting the quick formation of steelmaking slag to be conducive to converter control liquid steel temperature and endpoint carbon content, be conducive to improve semi-steel making level of control.
Although described the present invention in conjunction with exemplary embodiment above, those of ordinary skills should be clear, in the situation that do not depart from the spirit and scope of claim, can carry out various modifications to above-described embodiment.

Claims (6)

1. a method that improves semi-steel making endpoint carbon content, is characterized in that, said method comprising the steps of:
In ladle, going out in the process of half steel, the ferrosilicon of 1.5~6.0kg/ (t half steel) is being joined in ladle;
Then half steel is blended in steel melting furnace, lower oxygen gun blowing is smelted and is added relevant slag making materials and alloy by blowing requirement, after catch carbon, according to carbon content, re-blows, and molten steel endpoint carbon content is controlled to 0.10%~0.20%, carries oxygen and goes out rifle, stops blowing, wherein,
Described half steel is the molten steel of vanadium-bearing hot metal after converter extracting vanadium or dephosphorization converter finishing blowing, and wherein contains 3.20%~3.80% C, 0.001%~0.05% Si by weight percentage.
2. a method that improves semi-steel making endpoint carbon content, is characterized in that, said method comprising the steps of:
Half steel is blended into after steel-making converter, the ferrosilicon of 1~5kg/ (t half steel) is joined in steel-making converter;
Then descend oxygen gun blowing to smelt and add relevant slag making materials and alloy by blowing requirement, after catch carbon, according to carbon content, re-blowing, molten steel endpoint carbon content is controlled to 0.10%~0.20%, carrying oxygen and go out rifle, stopping blowing, wherein,
The described half steel that is blended into steel-making converter is the molten iron that vanadium-bearing hot metal obtains after vanadium extraction, and wherein contains 3.20%~3.80% C, 0.001%~0.05% Si by weight percentage.
3. a method that improves semi-steel making endpoint carbon content, is characterized in that, said method comprising the steps of:
Half steel is blended into after steel-making converter, and lower oxygen gun blowing is smelted after 0.5~1min, and the ferrosilicon of 1~5kg/ (t half steel) is joined in steel-making converter, adds relevant slag making materials and alloy by blowing requirement simultaneously;
After catch carbon, according to carbon content, re-blow, molten steel endpoint carbon content is controlled to 0.10%~0.20%, carry oxygen and go out rifle, stop blowing, wherein,
The described half steel that is blended into steel-making converter is the molten iron that vanadium-bearing hot metal obtains after vanadium extraction, and wherein contains 3.20%~3.80% C, 0.001%~0.05% Si by weight percentage.
4. according to the method for the raising semi-steel making endpoint carbon content described in any one in claims 1 to 3, it is characterized in that, described slag making materials is lime, high magnesium lime, composite fluxing medium and steel-making alloy.
5. according to the method for the raising semi-steel making endpoint carbon content described in any one in claims 1 to 3, it is characterized in that, the add-on of described ferrosilicon is the ferrosilicon of 2.2~4.5kg/ (t half steel).
6. a Semi-steel making method, is characterized in that, described Semi-steel making method comprises that employing improves the carbon content of endpoint molten steel according to the method for the raising semi-steel making endpoint carbon content described in any one in claims 1 to 3.
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103627842A (en) * 2013-11-14 2014-03-12 攀钢集团研究院有限公司 Method for enhancing end point carbon content in smelting medium-carbon steel from semisteel and semisteel steelmaking method
CN103993123A (en) * 2014-06-06 2014-08-20 攀钢集团攀枝花钢铁研究院有限公司 Method for lowering end point oxygen content in molten iron/steel/semisteel smelting process
CN103993121A (en) * 2014-06-06 2014-08-20 攀钢集团攀枝花钢铁研究院有限公司 Method for enhancing end point carbon of high-carbon steel in molten iron/steel/semisteel smelting process
CN103993120A (en) * 2014-06-06 2014-08-20 攀钢集团攀枝花钢铁研究院有限公司 Method for smelting low-sulfur steel with semisteel
CN103993119A (en) * 2014-06-06 2014-08-20 攀钢集团攀枝花钢铁研究院有限公司 Semisteel slag forming method
CN112613161A (en) * 2020-11-30 2021-04-06 攀钢集团西昌钢钒有限公司 Heat balance calculation method for semisteel steelmaking and application
CN115141905A (en) * 2022-07-13 2022-10-04 马鞍山钢铁股份有限公司 Converter smelting method of IF steel with high scrap ratio, low oxygen level and low phosphorus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102094103A (en) * 2011-01-12 2011-06-15 攀钢集团钢铁钒钛股份有限公司 Method for increasing endpoint carbon content of converter
CN102747181A (en) * 2011-04-18 2012-10-24 宝山钢铁股份有限公司 Smelting method of 9Ni steel
CN102766722A (en) * 2012-07-17 2012-11-07 攀钢集团研究院有限公司 Method for smelting high-carbon steel from semi-steel
CN103205524A (en) * 2013-04-15 2013-07-17 攀钢集团攀枝花钢铁研究院有限公司 Method for smelting low-sulfur steel from semi-steel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102094103A (en) * 2011-01-12 2011-06-15 攀钢集团钢铁钒钛股份有限公司 Method for increasing endpoint carbon content of converter
CN102747181A (en) * 2011-04-18 2012-10-24 宝山钢铁股份有限公司 Smelting method of 9Ni steel
CN102766722A (en) * 2012-07-17 2012-11-07 攀钢集团研究院有限公司 Method for smelting high-carbon steel from semi-steel
CN103205524A (en) * 2013-04-15 2013-07-17 攀钢集团攀枝花钢铁研究院有限公司 Method for smelting low-sulfur steel from semi-steel

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103627842A (en) * 2013-11-14 2014-03-12 攀钢集团研究院有限公司 Method for enhancing end point carbon content in smelting medium-carbon steel from semisteel and semisteel steelmaking method
CN103993123A (en) * 2014-06-06 2014-08-20 攀钢集团攀枝花钢铁研究院有限公司 Method for lowering end point oxygen content in molten iron/steel/semisteel smelting process
CN103993121A (en) * 2014-06-06 2014-08-20 攀钢集团攀枝花钢铁研究院有限公司 Method for enhancing end point carbon of high-carbon steel in molten iron/steel/semisteel smelting process
CN103993120A (en) * 2014-06-06 2014-08-20 攀钢集团攀枝花钢铁研究院有限公司 Method for smelting low-sulfur steel with semisteel
CN103993119A (en) * 2014-06-06 2014-08-20 攀钢集团攀枝花钢铁研究院有限公司 Semisteel slag forming method
CN103993121B (en) * 2014-06-06 2016-02-03 攀钢集团攀枝花钢铁研究院有限公司 A kind of method of molten iron and steel and semi-steel making raising medium and high carbon steel end point carbon
CN103993123B (en) * 2014-06-06 2016-02-03 攀钢集团攀枝花钢铁研究院有限公司 A kind of method of molten iron and steel and semi-steel making reduction terminal oxygen level
CN103993120B (en) * 2014-06-06 2016-03-16 攀钢集团攀枝花钢铁研究院有限公司 A kind of method of semisteel smelting low-sulfur steel
CN103993119B (en) * 2014-06-06 2016-04-13 攀钢集团攀枝花钢铁研究院有限公司 A kind of method of half steel slag making
CN112613161A (en) * 2020-11-30 2021-04-06 攀钢集团西昌钢钒有限公司 Heat balance calculation method for semisteel steelmaking and application
CN115141905A (en) * 2022-07-13 2022-10-04 马鞍山钢铁股份有限公司 Converter smelting method of IF steel with high scrap ratio, low oxygen level and low phosphorus
CN115141905B (en) * 2022-07-13 2023-07-28 马鞍山钢铁股份有限公司 Smelting method of high-scrap-ratio low-oxygen-level low-phosphorus IF steel converter

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