CN102382947B - Low-basicity synthetic slag for external refining - Google Patents
Low-basicity synthetic slag for external refining Download PDFInfo
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- CN102382947B CN102382947B CN2011103858256A CN201110385825A CN102382947B CN 102382947 B CN102382947 B CN 102382947B CN 2011103858256 A CN2011103858256 A CN 2011103858256A CN 201110385825 A CN201110385825 A CN 201110385825A CN 102382947 B CN102382947 B CN 102382947B
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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
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Abstract
The invention relates to a synthetic slag in the metallurgy field, in particular to a low-basicity synthetic slag for external refining. The low-basicity synthetic slag for external refining consists of the following components according to weight percentage: 30 to 40 percent of CaO, 35 to 45 percent of SiO, lower than or equal to 5 percent of Al2O3, 8 to 15 percent of MgO, 6 to 15 percent of CaF2, lower than or equal to 2 percent of FeO, the rest of the components is unavoidable impurities, and the sum of all the components is 100 percent. Due to the low-basicity synthetic slag for external refining disclosed by the invention, steel ladles can be effectively inhibited from corrosion while the impurities are plasticized, the control levels of the impurities of the manufactured spring steels and core thread wire rods steel are good, the cold drawing property is excellent, the widths of the impurities of the wire rods are stabilized below 10um, and most of the widths of the impurities of the wire rods are less than 5um.
Description
Technical field
The present invention relates to a kind of synthetic slag of field of metallurgy, a kind of low-basicity synthetic slag for external refining is specially adapted to smelt spring steel, cord steel etc. the high steel grade external refining of inclusion plastification requirement is hanged down the basicity synthetic slag with the fluorine-containing magnesium that contains specifically.
Background technology
In recent years, along with the fast development of Chinese Automobile Industry ', market is increasing to the demand of spring steel and cord steel, according to statistics, 2010 domestic will be more than 1,500,000 tons to spring steel supply and demand amount, will be more than 600,000 tons to the supply and demand amount of cord steel.Important spare part valve spring, shock mitigation system bearing spring, clutch spring and the doughnut of motor car engine all needs to carry out cold drawing processing at the hot rolling wire as raw material with steel cord etc., therefore, the plastic deformation ability of inclusion there is high requirement.
Tradition smelting spring steel and the used low basicity slag of cord steel because basicity of slag is low, corrode seriously ladle, and SiO2 content is higher in the slag, easily lumps, and inclusion plastification treatment effect is undesirable; Simultaneously seriously aggravated again the ladle erosion, introduced new non deformable magnesium oxide and magnesium-aluminium spinel and be mingled with, inclusion plastification effect can not get embodying, and cold drawing performance and the fatigue property of hot rolling wire can not get effective lifting.
Summary of the invention
Technical problem to be solved by this invention is, the easy erosion ladle that the low basicity slag that uses for present spring steel and cord steel external refining exists in production process and easy agglomeration problems, a kind of low-basicity synthetic slag for external refining is proposed, can when realize the inclusion plastification, effectively suppress ladle and corrode.
The technical scheme that the present invention solves above technical problem is:
A kind of low-basicity synthetic slag for external refining, composed of the following components by weight percentage: CaO:30%～40%, SiO
2: 35%～45%, Al
2O
3:≤5%, MgO:8%～15%, CaF
2: 6%～15%, FeO :≤2.0%, surplus is inevitable impurity, more than the sum of each component be 100%.
CaO: Main Function is desulfurization and adjusts basicity; SiO
2: Main Function inclusion modification and adjustment basicity; Al
2O
3: main remaining in the slag; MgO: Main Function is the anti-material of protection ladle, prevents from introducing the high-melting-point inclusion because ladle corrodes; CaF
2: adjust the synthetic slag fusing point, FeO: less important remnants in the slag; Other: inevitable impurity.
The technical scheme that the present invention further limits is:
Aforesaid low-basicity synthetic slag for external refining, composed of the following components by weight percentage: CaO:37.27%, SiO
2: 41.64%, Al
2O
3: 3.81%, MgO:8.86%, CaF
2: 6.78%, FeO:0.89%, surplus is other inevitable impurity.
Aforesaid low-basicity synthetic slag for external refining, composed of the following components by weight percentage: CaO:39.33%, SiO
2: 36.71%, Al
2O
3: 3.78%, MgO:10.53%, CaF
2: 7.62%, FeO:1.16%, surplus is other inevitable impurity.
Aforesaid low-basicity synthetic slag for external refining, composed of the following components by weight percentage: CaO:30.52%, SiO
2: 44.97%, Al
2O
3: 5.00%, MgO:9.10%, CaF
2: 9.03%, FeO:1.36%, surplus is other inevitable impurity.
Aforesaid low-basicity synthetic slag for external refining, composed of the following components by weight percentage: CaO:31.42%, SiO
2: 35.02%, Al
2O
3: 1.72%, MgO:14.88%, CaF
2: 14.95%, FeO:2.00%, surplus is other inevitable impurity.
The invention has the beneficial effects as follows: the present invention is used for smelting spring steel, cord steel etc. require high steel grade external refining to hang down the basicity synthetic slag with the fluorine-containing magnesium that contains to the inclusion plastification, can solve the low basicity slag of prior art medi-spring steel and cord steel external refining use in the production process easy erosion ladle that exists and the technical problem of easily luming, can be when realizing the inclusion plastification, effectively suppressing ladle corrodes, it is good to produce the Control and Inclusion Removal level, the spring steel of cold drawing superior performance and cord steel wire rod, the inclusion width of wire rod is stabilized in below the 10 μ m, and the overwhelming majority is below 5 μ m.
Embodiment
Embodiment 1
The low-basicity synthetic slag for external refining of present embodiment, composed of the following components by weight percentage: CaO:37.27%, SiO
2: 41.64%, Al
2O
3: 3.81%, MgO:8.86%, CaF
2: 6.78%, FeO:0.89%, surplus is other inevitable impurity.
Embodiment 2
The low-basicity synthetic slag for external refining of present embodiment, composed of the following components by weight percentage: CaO:39.33%, SiO
2: 36.71%, Al
2O
3: 3.78%, MgO:10.53%, CaF
2: 7.62%, FeO:1.16%, surplus is other inevitable impurity.
Embodiment 3
The low-basicity synthetic slag for external refining of present embodiment, composed of the following components by weight percentage: CaO:30.52%, SiO
2: 44.97%, Al
2O
3: 5.00%, MgO:9.10%, CaF
2: 9.03%, FeO:1.36%, surplus is other inevitable impurity.
Embodiment 4
The low-basicity synthetic slag for external refining of present embodiment, composed of the following components by weight percentage: CaO:31.42%, SiO
2: 35.02%, Al
2O
3: 1.72%, MgO:14.88%, CaF
2: 14.95%, FeO:2.00%, surplus is other inevitable impurity.
Embodiment 1-4 carries out the inclusion grading by GB/T 10561, and the result is as shown in the table:
Table 1
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (1)
1. a low-basicity synthetic slag for external refining is characterized in that: composed of the following components by weight percentage: CaO:37.27%, SiO
2: 41.64%, Al
2O
3: 3.81%, MgO:8.86%, CaF
2: 6.78%, FeO:0.89%, surplus is other inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103858256A CN102382947B (en) | 2011-11-29 | 2011-11-29 | Low-basicity synthetic slag for external refining |
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|---|---|---|---|
| CN2011103858256A CN102382947B (en) | 2011-11-29 | 2011-11-29 | Low-basicity synthetic slag for external refining |
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| CN102382947A CN102382947A (en) | 2012-03-21 |
| CN102382947B true CN102382947B (en) | 2013-05-29 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103421930B (en) * | 2012-05-17 | 2016-01-20 | 张延大 | A kind of cord steel refining material and preparation method thereof |
| CN102912082A (en) * | 2012-10-26 | 2013-02-06 | 北京科技大学 | Low-alkalinity synthetic slag for external refining of boiler tube steel |
| CN103243256B (en) * | 2013-05-28 | 2015-03-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling titanium content in high-carbon steel and production method of tire cord steel |
| CN104232843A (en) * | 2013-06-19 | 2014-12-24 | 宜兴市瑞华工业炉科技有限公司 | Synthetic slag containing controlled plastic inclusions and preparation method thereof |
| CN110195145B (en) * | 2019-06-13 | 2021-06-25 | 中天钢铁集团有限公司 | Refining slag for vitrifying oxide inclusions in cord steel |
| CN110904303B (en) * | 2019-10-31 | 2022-01-25 | 邯郸钢铁集团有限责任公司 | Smelting method of rail steel |
Citations (2)
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|---|---|---|---|---|
| CN1201833A (en) * | 1998-05-05 | 1998-12-16 | 宝山钢铁(集团)公司 | Low alkaline composite slag for steel liquid improvement out of furnace |
| CN101545027A (en) * | 2008-03-24 | 2009-09-30 | 宝山钢铁股份有限公司 | Low-carbon quick melting ladle refining slag |
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2011
- 2011-11-29 CN CN2011103858256A patent/CN102382947B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201833A (en) * | 1998-05-05 | 1998-12-16 | 宝山钢铁(集团)公司 | Low alkaline composite slag for steel liquid improvement out of furnace |
| CN101545027A (en) * | 2008-03-24 | 2009-09-30 | 宝山钢铁股份有限公司 | Low-carbon quick melting ladle refining slag |
Non-Patent Citations (5)
| Title |
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| 低碱度顶渣控制帘线钢中CaO-SiO2-Al2O3-MgO类夹杂物成分的试验研究;王立峰 等;《河北科技大学学报》;20040229;第26卷(第1期);26-29 * |
| 何飞舟 等.LF精炼钢中氧化物夹杂的控制.《河北理工大学学报(自然科学版)》.2011,第33卷(第3期),21-24、33. * |
| 控制高碳钢中CaO-Al2O3-SiO2类夹杂物成分的实验研究;王立峰 等;《钢铁》;20040131;第39卷(第1期);21-23 * |
| 王立峰 等.低碱度顶渣控制帘线钢中CaO-SiO2-Al2O3-MgO类夹杂物成分的试验研究.《河北科技大学学报》.2004,第26卷(第1期),26-29. |
| 王立峰 等.控制高碳钢中CaO-Al2O3-SiO2类夹杂物成分的实验研究.《钢铁》.2004,第39卷(第1期),21-23. |
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