CN1286312A - Slag modifier for refining molten steel - Google Patents
Slag modifier for refining molten steel Download PDFInfo
- Publication number
- CN1286312A CN1286312A CN00107235A CN00107235A CN1286312A CN 1286312 A CN1286312 A CN 1286312A CN 00107235 A CN00107235 A CN 00107235A CN 00107235 A CN00107235 A CN 00107235A CN 1286312 A CN1286312 A CN 1286312A
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- China
- Prior art keywords
- refining
- slag modifier
- molten steel
- slag
- modifier
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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
A slag modifier for refining molten steel contains CaO (20-45 wt.%), Al2O3 (20-45 wt.%), one or more of Al, Si, Ca, Ba and Re (5-15 wt.%), CaF2 (4-6 wt.%), SiO2 (less than 10 wt.%) and MgO (less than 10 wt.%), and has the structure to pre-smelt sosoloid. The refined steel contains low contents of S,O2 and impurities.
Description
The present invention relates to a kind of slag modifier for refining molten steel, particularly be applicable to the slag modifier for refining of converter molten steel.
Along with the development of technology, more and more high requirements have been proposed for the degree of cleaning of molten steel, various liquid steel refining technology thereby be subjected to steelmaker author's close attention day by day.In various liquid steel refining technology, molten steel refining agent demonstrates great vitality because of it is easy to use, with low cost, effective.The refining agent of calcium aluminate system in the molten steel refining agent of prior art, the advantage that the ability with dross inclusion adsorption is strong, sweetening power is strong.But when using this class slag modifier for refining, require converter tapping not to be with slag, because the converter slag of hyperoxia voltinism has very big negative impact to the ability of deoxidation, desulfurization and the dross inclusion adsorption of above-mentioned refining agent.Yet the pushing off the slag of the converter tapping of China operation at present is quite unsatisfactory, thereby conventional calcium aluminate is that refining agent can not embody the advantage aspect deoxidation, desulfurization and dross inclusion adsorption in the converter operation of China.
Therefore, the object of the present invention is to provide a kind of slag modifier for refining, this slag modifier for refining converter tapping pushing off the slag operation carry out under incomplete situation, also can obtain the good result of deoxidation, desulfurization, dross inclusion adsorption.
Another object of the present invention is to provide a kind of slag modifier for refining of fritting, this slag modifier for refining also has decontamination, the advantage that utilization ratio is high except that the effect with above-mentioned deoxidation, desulfurization and dross inclusion adsorption.
Slag modifier for refining of the present invention contains (weight %):
CaO 20～45%, Al
2O
320～45%, among metal A l, Si, Ca, Ba, the Re one or more 5～15%, CaF
24～6%, SiO
2≤ 10%, MgO≤10%.
The composition of fritting refining agent of the present invention is the same, but the weave construction of this refining agent is a sosoloid.
Slag modifier for refining of the present invention also contains ≯ 0.05% P and ≯ 0.15% S.
CaO in the slag modifier for refining of the present invention is the base stock of desulfurization, and when converter finishing slag basicity was high, the CaO content in the slag supplying agent took off limit, on the contrary capping.Make the requirement that reaches desulfurization through basicity in the slag of adjusting in a word.Al in the slag modifier for refining of the present invention
2O
3Be mainly used in the fusing point of this slag supplying agent is adjusted to process for making acceptable degree.Metal A l in the slag modifier for refining of the present invention, Si, Ca, Ba, Re play a part reductor, it had both sloughed the oxygen in the converter slag of bringing in the ladle, also remove the oxygen in the molten steel, its content will both satisfy the effect of residue adjustment in a word, also satisfied the effect of molten steel final deoxygenation.The metal that exceeds the qualification metal content in the slag modifier for refining of the present invention then plays a part alloying agents.
It is to be noted still do not have at present the method for the analysis metal in the dreg aluminium of standard in the industry, the metallic aluminium in the slag modifier for refining of the present invention grinds institute's exploitation " Indian red is measured the method for metallic aluminium " mensuration with climbing the steel steel.
The preparation technology of slag modifier for refining of the present invention is as follows:
To contain CaO＞81% lime, contain Al
2O
3＞65% aluminium vanadine, fluorite and metal A l, Re alloy, the Si-Fe that contains Si＞25%, Ba-Fe or Ca-Si alloy are broken into the particle of 15mm, then by the composition assembly of above-mentioned slag modifier for refining, mix.
The preparation method of the slag modifier for refining of this fritting is as follows:
The above-mentioned slag modifier for refining mixture that combines is used water as binding agent make ball, do the fuel fritting with coke then in shaft furnace, prefusing temperature is 1700～1900 ℃.Slag after the fritting is through cooling, broken particle into about 15mm, thus make the slag modifier for refining of this fritting.
The using method of slag modifier for refining of the present invention is as follows:
When [C], [P] content of molten steel enters the composition specification, after temperature reaches tapping temperature, prepare the pushing off the slag tapping; The consumption of this slag modifier for refining is 4～15kg/T steel, the oxygen activity in the molten steel when concrete consumption depends on catch carbon, the carbon content in the molten steel [C], the quantity of the converter slag during tapping in the inflow ladle.When described oxygen activity height, [C] is low and flow into the quantity of the converter slag in the ladle when big, gets the upper limit of this consumption, otherwise gets its lower limit.30～35% (weight) of this slag modifier for refining of predetermined volume are added in the ladle in advance, in tapping process and tapping add remaining this slag modifier for refining successively after finishing.In tapping process and after tapping finishes, continue bag bottom blowing Ar in the usual way, so that molten steel and slag modifier for refining thorough mixing.
Molten steel with slag modifier for refining of the present invention was handled is not having the T[O that can make under the condition of being strict with in the steel billet to converter tapping pushing off the slag operation] reach 13ppm, total amount reaches 38.67ppm.
Further specify the present invention below by embodiment.Embodiment 1:
Be 85% lime 500kg, contain Al with containing CaO
2O
3Be 75% aluminium vanadine 390kg, fluorite 50kg carries out fritting with coke as fuel after the broken granulation of metallic aluminium 90kg in shaft furnace, obtain fritting slag modifier for refining composed as follows:
CaO 43%, Al
2O
336%, metal A l 7%, CaF
24.83%, SiO
25.83%, MgO 2.72%, and P 0.023%, and S 0.042%, and all the other are unavoidable impurities.
Handle the STB32 steel of 140T converter smelting with above-mentioned slag modifier for refining.Technical process is:
Converter smelting-stove rear platform residue adjustment refining treatment-LF refining residue adjustment is handled.Wherein add this slag modifier for refining 460kg in the ladle, add this slag modifier for refining 200kg during the LF refining, at last continuous casting of molten steel is become base.Comparative Examples 1:
With converter smelting with steel grade molten steel 140T, but need not be of the present invention slag modifier for refining handle.
Embodiment 1 and Comparative Examples 1 the results are shown in following each the table:
The variation of table 1 [S], %
| Converter terminal [S] | After LF handles | The reduction amplitude | |
| Embodiment 1 | 0.0123 | 0.0098 | 20.3 |
| Comparative Examples 1 | 0.0148 | 0.0173 | -8.83 |
Table 1 T[O] variation
| Embodiment 1 | T[O in the strand] be 13.0ppm |
| Comparative Examples 1 | T[O in the strand] be 38.3ppm |
Variation (the unit: ppm) of inclusion in table 3 molten steel
| Middle Baogang water inclusion content | The steel billet inclusion content | |||
| Total amount | Al 2O 3Be mingled with | Total amount | Al 2O 3Be mingled with | |
| Embodiment 1 | 169.5 | 101.4 | 38.67 | 24.27 |
| Comparative Examples 1 | 206.7 | 163.7 | 44.6 | 28.1 |
Conclusion: the molten steel of handling with slag modifier for refining of the present invention with do not compare with the molten steel of this slag modifier for refining processing, the former is [S], T[O in steel] and inclusion content aspect all be better than the latter.
Claims (3)
1, a kind of slag modifier for refining molten steel, it contains (weight %): CaO 20～45%, Al
2O
320～45%, among metal A l, Si, Ca, Ba, the Re one or more 5～15%, CaF
24～6%, SiO
2≤ 10%, MgO≤10%.
2, slag modifier for refining molten steel as claimed in claim 1 is characterized in that described slag modifier for refining molten steel has the structure of fritting sosoloid.
3, slag modifier for refining molten steel as claimed in claim 1 or 2 is characterized in that also containing in the described slag modifier for refining molten steel P that is not more than 0.05% and the S that is not more than 0.15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001072358A CN1179055C (en) | 2000-04-29 | 2000-04-29 | Slag modifier for refining molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001072358A CN1179055C (en) | 2000-04-29 | 2000-04-29 | Slag modifier for refining molten steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1286312A true CN1286312A (en) | 2001-03-07 |
| CN1179055C CN1179055C (en) | 2004-12-08 |
Family
ID=4578563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001072358A Expired - Fee Related CN1179055C (en) | 2000-04-29 | 2000-04-29 | Slag modifier for refining molten steel |
Country Status (1)
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| CN (1) | CN1179055C (en) |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340677C (en) * | 2004-11-30 | 2007-10-03 | 宝山钢铁股份有限公司 | Slag regulating agent for super high power large electric furnace smelting |
| CN100371464C (en) * | 2006-06-02 | 2008-02-27 | 重庆大学 | Molten steel composite refining agent |
| CN101134987B (en) * | 2006-08-30 | 2010-05-12 | 宝山钢铁股份有限公司 | Desulfurizing agent for non-oriented silicon steel |
| CN101353750B (en) * | 2007-07-23 | 2010-11-03 | 宝山钢铁股份有限公司 | Refining method by in situ extraction of inclusion content in melting steel |
| CN101545017B (en) * | 2008-03-26 | 2010-12-22 | 上海梅山钢铁股份有限公司 | Ladle slag modifying agent |
| CN102002550A (en) * | 2010-12-09 | 2011-04-06 | 湖南华菱湘潭钢铁有限公司 | Slag modifier for converter refining |
| CN101497934B (en) * | 2009-03-12 | 2011-04-20 | 浙江杭美炉料制造有限公司 | Heating slag washing material for converter steel melting, preparation and use method thereof |
| CN102071285A (en) * | 2010-05-04 | 2011-05-25 | 陈兰君 | Molten steel refining purification assisting agent and preparation method thereof |
| US20120291591A1 (en) * | 2011-05-16 | 2012-11-22 | Weixue Xiao | Agent for steel-making formed by aluminum-making slag |
| CN103146872A (en) * | 2013-03-26 | 2013-06-12 | 莱芜钢铁集团有限公司 | Pre-molten synthetic slag and converter tapping reverse wash-heat method using same |
| CN103233098A (en) * | 2013-05-13 | 2013-08-07 | 涟源市飞达冶金炉料厂 | Novel direct slag-feeding washing mixed material application method in converter tapping process |
| CN103243197A (en) * | 2013-05-13 | 2013-08-14 | 涟源市飞达冶金炉料厂 | Novel direct continuous casting slag washing mixed material and preparation process thereof |
| CN103451374A (en) * | 2013-09-22 | 2013-12-18 | 新疆中合大正商贸有限公司 | Production process of aluminium slag adjusting agent for LF refining furnace |
| CN104342533A (en) * | 2013-07-31 | 2015-02-11 | 沈阳铸造研究所 | Special slag forming agent for smelting steel containing active elements and preparation method thereof |
| CN105734197A (en) * | 2016-02-25 | 2016-07-06 | 济南济钢铁合金厂 | Novel environment-friendly synthetic slag forming material |
| CN106048431A (en) * | 2016-07-13 | 2016-10-26 | 马鞍山市万鑫铸造有限公司 | Alloy nut connecting piece low in weight and high in strength and preparation method thereof |
| CN106048452A (en) * | 2016-07-13 | 2016-10-26 | 马鞍山市万鑫铸造有限公司 | Alloy steel nut connecting piece and preparation method thereof |
| CN106191630A (en) * | 2016-07-13 | 2016-12-07 | 马鞍山市万鑫铸造有限公司 | Nut of stainless steel composite material casting and preparation method thereof |
| CN106191629A (en) * | 2016-07-13 | 2016-12-07 | 马鞍山市万鑫铸造有限公司 | Nut of non-oxidizability and preparation method thereof is improved based on blackening process method |
| CN107904359A (en) * | 2017-12-19 | 2018-04-13 | 天津基纳科技发展有限公司 | A kind of refining of metal composition and its application |
| CN108103270A (en) * | 2017-12-22 | 2018-06-01 | 马鞍山中科冶金材料科技有限公司 | Calcium and magnesium base alumina-silica molten steel scavenger and preparation method thereof |
| CN108707717A (en) * | 2018-08-01 | 2018-10-26 | 安徽信息工程学院 | A kind of method of refining of spheroidal graphite cast-iron |
| CN110004271A (en) * | 2019-04-18 | 2019-07-12 | 湖南华菱涟源钢铁有限公司 | Control the production technology of B type impurity in pipe line steel |
| CN112322841A (en) * | 2020-10-22 | 2021-02-05 | 阳新金晟贸易有限公司 | Industrial fluxing agent and preparation method thereof |
| CN113122672A (en) * | 2021-04-20 | 2021-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for dephosphorizing semisteel steelmaking converter after furnace |
-
2000
- 2000-04-29 CN CNB001072358A patent/CN1179055C/en not_active Expired - Fee Related
Cited By (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340677C (en) * | 2004-11-30 | 2007-10-03 | 宝山钢铁股份有限公司 | Slag regulating agent for super high power large electric furnace smelting |
| CN100371464C (en) * | 2006-06-02 | 2008-02-27 | 重庆大学 | Molten steel composite refining agent |
| CN101134987B (en) * | 2006-08-30 | 2010-05-12 | 宝山钢铁股份有限公司 | Desulfurizing agent for non-oriented silicon steel |
| CN101353750B (en) * | 2007-07-23 | 2010-11-03 | 宝山钢铁股份有限公司 | Refining method by in situ extraction of inclusion content in melting steel |
| CN101545017B (en) * | 2008-03-26 | 2010-12-22 | 上海梅山钢铁股份有限公司 | Ladle slag modifying agent |
| CN101497934B (en) * | 2009-03-12 | 2011-04-20 | 浙江杭美炉料制造有限公司 | Heating slag washing material for converter steel melting, preparation and use method thereof |
| CN102071285A (en) * | 2010-05-04 | 2011-05-25 | 陈兰君 | Molten steel refining purification assisting agent and preparation method thereof |
| CN102071285B (en) * | 2010-05-04 | 2012-09-05 | 陈兰君 | Molten steel refining purification assisting agent and preparation method thereof |
| CN102002550A (en) * | 2010-12-09 | 2011-04-06 | 湖南华菱湘潭钢铁有限公司 | Slag modifier for converter refining |
| US20120291591A1 (en) * | 2011-05-16 | 2012-11-22 | Weixue Xiao | Agent for steel-making formed by aluminum-making slag |
| WO2012155330A1 (en) * | 2011-05-16 | 2012-11-22 | Xiao Weixue | Agent for steelmaking made of aluminium-smelting scum |
| CN103146872B (en) * | 2013-03-26 | 2015-02-18 | 莱芜钢铁集团有限公司 | Pre-molten synthetic slag and converter tapping reverse wash-heat method using same |
| CN103146872A (en) * | 2013-03-26 | 2013-06-12 | 莱芜钢铁集团有限公司 | Pre-molten synthetic slag and converter tapping reverse wash-heat method using same |
| CN103233098A (en) * | 2013-05-13 | 2013-08-07 | 涟源市飞达冶金炉料厂 | Novel direct slag-feeding washing mixed material application method in converter tapping process |
| CN103243197A (en) * | 2013-05-13 | 2013-08-14 | 涟源市飞达冶金炉料厂 | Novel direct continuous casting slag washing mixed material and preparation process thereof |
| CN103233098B (en) * | 2013-05-13 | 2016-01-20 | 涟源市飞达冶金炉料厂 | A kind of straight upper using method of wash heat mixing material in converter tapping |
| CN104342533A (en) * | 2013-07-31 | 2015-02-11 | 沈阳铸造研究所 | Special slag forming agent for smelting steel containing active elements and preparation method thereof |
| CN104342533B (en) * | 2013-07-31 | 2016-04-06 | 沈阳铸造研究所 | A kind of smelting special slag former containing active element steel and preparation method thereof |
| CN103451374A (en) * | 2013-09-22 | 2013-12-18 | 新疆中合大正商贸有限公司 | Production process of aluminium slag adjusting agent for LF refining furnace |
| CN105734197A (en) * | 2016-02-25 | 2016-07-06 | 济南济钢铁合金厂 | Novel environment-friendly synthetic slag forming material |
| CN105734197B (en) * | 2016-02-25 | 2017-09-15 | 山东济钢合金材料科技有限公司 | A kind of novel environment friendly synthesizes slag making materials |
| CN106191630A (en) * | 2016-07-13 | 2016-12-07 | 马鞍山市万鑫铸造有限公司 | Nut of stainless steel composite material casting and preparation method thereof |
| CN106048452A (en) * | 2016-07-13 | 2016-10-26 | 马鞍山市万鑫铸造有限公司 | Alloy steel nut connecting piece and preparation method thereof |
| CN106191629A (en) * | 2016-07-13 | 2016-12-07 | 马鞍山市万鑫铸造有限公司 | Nut of non-oxidizability and preparation method thereof is improved based on blackening process method |
| CN106048431A (en) * | 2016-07-13 | 2016-10-26 | 马鞍山市万鑫铸造有限公司 | Alloy nut connecting piece low in weight and high in strength and preparation method thereof |
| CN107904359A (en) * | 2017-12-19 | 2018-04-13 | 天津基纳科技发展有限公司 | A kind of refining of metal composition and its application |
| CN108103270A (en) * | 2017-12-22 | 2018-06-01 | 马鞍山中科冶金材料科技有限公司 | Calcium and magnesium base alumina-silica molten steel scavenger and preparation method thereof |
| CN108707717A (en) * | 2018-08-01 | 2018-10-26 | 安徽信息工程学院 | A kind of method of refining of spheroidal graphite cast-iron |
| CN110004271A (en) * | 2019-04-18 | 2019-07-12 | 湖南华菱涟源钢铁有限公司 | Control the production technology of B type impurity in pipe line steel |
| CN110004271B (en) * | 2019-04-18 | 2021-04-02 | 湖南华菱涟源钢铁有限公司 | Production process for controlling B-type inclusions in pipeline steel |
| CN112322841A (en) * | 2020-10-22 | 2021-02-05 | 阳新金晟贸易有限公司 | Industrial fluxing agent and preparation method thereof |
| CN113122672A (en) * | 2021-04-20 | 2021-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for dephosphorizing semisteel steelmaking converter after furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1179055C (en) | 2004-12-08 |
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Granted publication date: 20041208 Termination date: 20130429 |