CN1626682A - Converter refined slaging medium and slagging technique - Google Patents
Converter refined slaging medium and slagging technique Download PDFInfo
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- CN1626682A CN1626682A CN 200310111177 CN200310111177A CN1626682A CN 1626682 A CN1626682 A CN 1626682A CN 200310111177 CN200310111177 CN 200310111177 CN 200310111177 A CN200310111177 A CN 200310111177A CN 1626682 A CN1626682 A CN 1626682A
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- slag former
- make
- lime
- bauxite
- submerged arc
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- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A slag-forming agent is prepared from dolomite, bauxite, lime and crude aluminium for refining molten steel in converter, or from lime stone, dolomite, lime, bauxite and crude aluminium for refining molten steel in LF furnace. Its advantages are lower oxidizing performance, high basicity, proper surface tension, viscosity and foaming power, and low corrosion. Its slag-forming process is also disclosed.
Description
Technical field
The present invention relates to a kind of process for making, especially a kind of slag former and slagging process of making steel in the refining process.
Background technology
At present, process for making is mainly the steel-making of LD converter steelmaking, LF refining furnace, continuous caster waters steel, adds some strengthening smelting means, fluxes as liquid iron charging, steel scrap heat supply, oxygen burner etc., further shorten the oxidation refining time of molten steel, also accelerated the one-tenth base speed of molten steel simultaneously.Because behind converter tapping, some converter finishing slag can enter ladle, after deoxidation, alloying, make the slag in the ladle be low basicity, hyperoxia voltinism, will produce erosion action to ladle like this, thereby consume too much refractory materials, increase production cost.Existing in addition refining slag former only adds in the refining process of LF stove, and does not classify at steel grade, and it is slow to make white slag form speed, can not give full play to the refining effect of LF stove.Therefore, be necessary prior art is improved.
Summary of the invention
The object of the present invention is to provide a kind of slag former and slagging process, handle, make the composition of slag and performance, give full play to the refining effect of LF stove, reduce production costs near the requirement of submerged arc base slag so that ladle slag is carried out upgrading.
The present invention realizes by following technical proposal:
A, in the converter tapping process, add the synthetic slag former of forming by following raw materials according by weight percentage:
Rhombspar 3-8%,
Bauxite 8-13%,
Lime 65-80%,
Crude aluminum 2-4%,
Make synthetic slag former composition satisfy following weight percent:
CaO????????????????????????70-75％，
SiO
2??????????????????????2-7％，
MgO????????????????????????1-3％，
Al
2O
3???????????????????10-15％，
Al?????????????????????????4-6％
S??????????????????????????＜0.06％；
B, in LF stove refining process, carbon content less than 0.10% steel grade, is added the low-carbon (LC) submerged arc slag former of being made up of following raw materials according by weight percentage:
Wingdale 25-40%,
Rhombspar 10-30%,
Lime 20-45%,
Bauxite 8-12%,
Crude aluminum 3-7%,
Make low-carbon (LC) submerged arc slag former composition satisfy following weight percent:
CaO????????????????????????68-72％，
SiO
2??????????????????????5-10％，
MgO????????????????????????1-3％，
Al
2O
3???????????????????7-14％，
Al?????????????????????????4-5％，
S??????????????????????????＜0.01％；
Perhaps, carbon content greater than 0.10% steel grade, is added the medium high carbon submerged arc slag former of being made up of following raw materials according by weight percentage:
Wingdale 10-30%,
Rhombspar 10-20%,
Lime 30-50%,
Bauxite 8-14%,
Calcium carbide 8-12%,
Coke 2-6%,
Make medium high carbon submerged arc slag former composition satisfy following weight percent:
CaO????????????????????????65-75％，
SiO
2?????????????????4-10％，
MgO???????????????????1-3％，
Al
2O
3??????????????7-14％，
C
Gu6-8%,
S?????????????????????＜0.08％。
Slag former provided by the invention makes by following method: with various raw material pulverizing to 5-15mm, make granularity be no more than 10% of total amount less than the quantity of 5mm, heating is baked to moisture less than 0.5%, after required the batching, fully stir, make it to mix and to use.
The present invention has following advantage and effect: because such scheme, the oxidisability of ladle slag is reduced, basicity improves 0.46, and has surface tension, viscosity and foaming, a storage bubble performance, FeO+MnO reduction amplitude reaches 40% in the slag, and S content improves 2.1 times in the slag, does not corrode ladle, at further LF stove refining process, make the submerged arc of soft steel submerged arc slag effective, not carburetting of molten steel or carbon increasing amount be less than 0.01%, deoxidation, desulfurization degree height, dross inclusion adsorption is many, the thermo-efficiency height, power consumption is low, and refining effect is good, therefore, be a slag making technology that is worthy of popularization.
Embodiment
Embodiment 1
Provide the specific embodiment of the present invention on elder brother's steel steelworks soft steel steel grade below.
Raw materials used chemical ingredients sees Table 1:
| Composition % raw material | CaO | SiO 2 | MgO | Al 2O 3 | C Gu | S | Granularity mm |
| Lime | ＞90 | ＜2 | ＜0.10 | 5～15 | |||
| Dolomitic lime stone | 34 | ＜2 | 18 | ＜0.01 | 5～15 | ||
| 53 | ＜2 | ＜0.01 | 5～15 | ||||
| Bauxite | ＜2 | ＞90 | ＜0.01 | 5～15 | |||
| Coke | 85 | ＜0.04 | 0.5～2 | ||||
| Aluminum shot | 3～10 | ||||||
| Calcium carbide | 0.5～4 |
1, with above-mentioned each raw material pulverizing to 5-15mm, make granularity be no more than 10% of total amount less than the quantity of 5mm, heating is baked to moisture less than 0.5%, after preparing burden on demand, fully stirs, and makes it to mix, stand-by;
2, in the converter tapping process, add the synthetic slag former of forming by following raw materials according by weight percentage:
Rhombspar 7%, bauxite 12%,
Lime 79%, crude aluminum 2%,
The composition of its synthetic slag former is as follows:
CaO??????????????74.29％，?SiO
2????????????4.62％，
MgO??????????????2.83％，??Al
2O
3?????????13.65％，
Al???????????????4.56％，??S????????????????0.05％；
3, in LF stove refining process, add the low-carbon (LC) submerged arc slag former of forming by following raw materials according by weight percentage:
Wingdale 30%, rhombspar 20%,
Lime 35%, bauxite 10%,
Crude aluminum 5%,
The composition of its low-carbon (LC) submerged arc slag former is as follows:
CaO??????????????70.26％，?SiO
2????????????9.87％，
MgO??????????????2.99％，??Al
2O
3?????????11.89％，
Al???????????????4.98％，??S????????????????0.01％。
The ladle slag composition is as follows:
CaO?40％，SiO
210％，MgO?5％，Al
2O
3?20％，S?0.3％，
FeO 4%, and MnO 5%, other composition 15.7%.
The refining slag composition is as follows:
CaO?55％，SiO
2?9％，MgO?4％，Al
2O
3?18％，S?0.35％，
FeO 0.4%, and MnO 0.4%, other composition 12.85%.
Embodiment 2
Provide the specific embodiment of the present invention on elder brother's steel steelworks medium and high carbon steel steel grade below.
Material composition sees Table 1.Feedstock production is identical with embodiment 1.
1, in the converter tapping process, add the synthetic slag former of forming by following raw materials according by weight percentage:
Rhombspar 8%, bauxite 13%,
Lime 75%, crude aluminum 4%,
The composition that should synthesize slag former is as follows:
CaO????????????????70.89％，SiO
2??????????????6.62％，
MgO????????????????2.98％，?Al
2O
3???????????10.79％，
Al?????????????????5.96％，?S??????????????????0.06％；
2, in LF stove refining process, add the medium high carbon submerged arc slag former of forming by following raw materials according by weight percentage:
Wingdale 20%, rhombspar 15%,
Lime 41%, bauxite 10%,
Calcium carbide 10%, coke 4%,
The composition of this medium high carbon submerged arc slag former is as follows:
CaO????????????????69.98％，SiO
2??????????????7.62％，
MgO????????????????2.91％，?Al
2O
3???????????11.67％，
C
Gu7.81%, S 0.01%.
The ladle slag composition is as follows:
CaO?32％，SiO
2?13％，MgO?4％，Al
2O
3?12％，S?0.27％，
FeO?4％，MnO?1.3％，
The refining slag composition is as follows:
CaO?55％，SiO
2?15％，MgO?5％，Al
2O
3?8％，S?0.35％，
FeO?0.5％，MnO?0.4％。
Claims (2)
1, a kind of converter refining slag former is characterized in that:
A, in the converter tapping process, add the synthetic slag former of forming by following raw materials according by weight percentage:
Rhombspar 3-8%,
Bauxite 8-13%,
Lime 65-80%,
Crude aluminum 2-4%,
Make synthetic slag former composition satisfy following weight percent:
CaO?????????????????70-75％，
SiO
2???????????????2-7％，
MgO?????????????????1-3％，
Al
2O
3????????????10-15％，
Al??????????????????4-6％
S???????????????????＜0.06％；
B, in LF stove refining process, carbon content less than 0.10% steel grade, is added the low-carbon (LC) submerged arc slag former of being made up of following raw materials according by weight percentage:
Wingdale 25-40%,
Rhombspar 10-30%,
Lime 20-45%,
Bauxite 8-12%,
Crude aluminum 3-7%,
Make low-carbon (LC) submerged arc slag former composition satisfy following weight percent:
CaO?????????????????68-72％，
SiO
2???????????????5-10％，
MgO?????????????????1-3％，
Al
2O
3????????????7-14％，
Al??????????????????4-5％，
S???????????????????＜0.01％；
Perhaps, carbon content greater than 0.10% steel grade, is added the medium high carbon submerged arc slag former of being made up of following raw materials according by weight percentage:
Wingdale 10-30%,
Rhombspar 10-20%,
Lime 30-50%,
Bauxite 8-14%,
Calcium carbide 8-12%,
Coke 2-6%,
Make medium high carbon submerged arc slag former composition satisfy following weight percent:
CaO???????????????65-75％，
SiO
2?????????????4-10％，
MgO???????????????1-3％，
Al
2O
3??????????7-14％，
C
Gu6-8%,
S?????????????????＜0.08％。
2, slag former according to claim 1, it is characterized in that making by following method: with various raw material pulverizing to 5-15mm, make granularity be no more than 10% of total amount less than the quantity of 5mm, heat and be baked to moisture less than 0.5%, after required the batching, fully stir, make it to mix and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101111770A CN100406579C (en) | 2003-12-08 | 2003-12-08 | Converter refined slaging medium and slagging technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101111770A CN100406579C (en) | 2003-12-08 | 2003-12-08 | Converter refined slaging medium and slagging technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1626682A true CN1626682A (en) | 2005-06-15 |
| CN100406579C CN100406579C (en) | 2008-07-30 |
Family
ID=34759347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101111770A Expired - Fee Related CN100406579C (en) | 2003-12-08 | 2003-12-08 | Converter refined slaging medium and slagging technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100406579C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100350060C (en) * | 2006-03-08 | 2007-11-21 | 许震 | High-efficient metallurgical refiner and preparation thereof |
| CN102399934A (en) * | 2010-09-07 | 2012-04-04 | 鞍钢股份有限公司 | Pre-melted type converter converter-rear slagging flux and manufacturing method thereof |
| CN102851445A (en) * | 2011-06-28 | 2013-01-02 | 鞍钢股份有限公司 | Magnesium slagging balls, and application method thereof |
| CN103333994A (en) * | 2013-04-03 | 2013-10-02 | 新疆八一钢铁股份有限公司 | Production technology of LF refinement submerged arc deoxidizing slag |
| CN103436658A (en) * | 2013-07-31 | 2013-12-11 | 南京梅山冶金发展有限公司 | Flux capable of reducing oxidability of steel ladle top dross |
| CN103789631A (en) * | 2014-01-16 | 2014-05-14 | 安徽省杨氏恒泰钢管扣件加工有限公司 | Steel tube material for long-distance conveying pipeline and preparation method thereof |
| CN107267713A (en) * | 2017-07-05 | 2017-10-20 | 天长市兴宇铸造有限公司 | A kind of alloy Investment Steel Castings casting slag former and its preparation technology |
| CN111893248A (en) * | 2020-09-07 | 2020-11-06 | 攀钢集团攀枝花钢钒有限公司 | Refining slagging agent and preparation method and use method thereof |
| CN113699371A (en) * | 2021-07-19 | 2021-11-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Preparation and use methods of composite deoxidation modified pellets |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101914651B (en) * | 2010-08-19 | 2012-03-28 | 遵化市励拓环保科技有限公司 | Converter or electric furnace steel-making slagging agent and preparation process thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2527156B2 (en) * | 1975-06-18 | 1980-09-04 | Thyssen Niederrhein Ag Huetten- Und Walzwerke, 4200 Oberhausen | Process for the pretreatment of molten steel in continuous casting |
| CN1209459A (en) * | 1997-08-26 | 1999-03-03 | 苏军 | Multifunctional synthesized slag for refining furnace |
| CN1202269C (en) * | 2002-10-12 | 2005-05-18 | 吴光亮 | Desulfurizer and its producing technique |
-
2003
- 2003-12-08 CN CNB2003101111770A patent/CN100406579C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100350060C (en) * | 2006-03-08 | 2007-11-21 | 许震 | High-efficient metallurgical refiner and preparation thereof |
| CN102399934A (en) * | 2010-09-07 | 2012-04-04 | 鞍钢股份有限公司 | Pre-melted type converter converter-rear slagging flux and manufacturing method thereof |
| CN102851445A (en) * | 2011-06-28 | 2013-01-02 | 鞍钢股份有限公司 | Magnesium slagging balls, and application method thereof |
| CN103333994A (en) * | 2013-04-03 | 2013-10-02 | 新疆八一钢铁股份有限公司 | Production technology of LF refinement submerged arc deoxidizing slag |
| CN103436658A (en) * | 2013-07-31 | 2013-12-11 | 南京梅山冶金发展有限公司 | Flux capable of reducing oxidability of steel ladle top dross |
| CN103789631A (en) * | 2014-01-16 | 2014-05-14 | 安徽省杨氏恒泰钢管扣件加工有限公司 | Steel tube material for long-distance conveying pipeline and preparation method thereof |
| CN107267713A (en) * | 2017-07-05 | 2017-10-20 | 天长市兴宇铸造有限公司 | A kind of alloy Investment Steel Castings casting slag former and its preparation technology |
| CN111893248A (en) * | 2020-09-07 | 2020-11-06 | 攀钢集团攀枝花钢钒有限公司 | Refining slagging agent and preparation method and use method thereof |
| CN113699371A (en) * | 2021-07-19 | 2021-11-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Preparation and use methods of composite deoxidation modified pellets |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100406579C (en) | 2008-07-30 |
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Granted publication date: 20080730 Termination date: 20161208 |
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