CN102382947A - Low-basicity synthetic slag for external refining - Google Patents
Low-basicity synthetic slag for external refining Download PDFInfo
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- CN102382947A CN102382947A CN2011103858256A CN201110385825A CN102382947A CN 102382947 A CN102382947 A CN 102382947A CN 2011103858256 A CN2011103858256 A CN 2011103858256A CN 201110385825 A CN201110385825 A CN 201110385825A CN 102382947 A CN102382947 A CN 102382947A
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- synthetic slag
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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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 specifically 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 with low basicity synthetic slag.
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 to spring steel supply and demand amount more than 1,500,000 tons, will be to the supply and demand amount of cord steel more than 600,000 tons.Important spare part valve spring, shock mitigation system bearing spring, clutch spring and the doughnut of motor car engine all needs on as the hot rolling wire of raw material, to carry out cold drawing processing with steel cord etc.; Therefore, the plastic deformation ability to inclusion has high requirement.
Tradition is smelted spring steel and the used low basicity slag of cord steel, because basicity of slag is low, ladle is corroded seriously, and SiO2 content is higher in the slag, is prone to caking, and inclusion plastification treatment effect is undesirable; Simultaneously seriously aggravated the ladle erosion again, introduced new non deformable Natural manganese dioxide and magnesium-aluminium spinel and be mingled with, inclusion plastification effect can not get embodying, and the 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; Easy erosion ladle and easy agglomeration problems that the low basicity slag that uses to present spring steel and cord steel external refining exists in production process; A kind of external refining is proposed with low basicity synthetic slag; 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 external refining is with low basicity synthetic slag, and is 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 a unavoidable impurities, more than the sum of each component be 100%.
CaO: mainly act as desulfurization and adjustment basicity; SiO
2: mainly act on inclusion modification and adjustment basicity; Al
2O
3: main remaining in the slag; MgO: mainly act as the anti-material of protection ladle, prevent to introduce the HMP inclusion because ladle corrodes; CaF
2: adjustment synthetic slag fusing point, FeO: less important remnants in the slag; Other: unavoidable impurities.
The technical scheme that the present invention further limits is:
Aforesaid external refining is with low basicity synthetic slag, and is 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 unavoidable impurities.
Aforesaid external refining is with low basicity synthetic slag, and is 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 unavoidable impurities.
Aforesaid external refining is with low basicity synthetic slag, and is 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 unavoidable impurities.
Aforesaid external refining is with low basicity synthetic slag, and is 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 unavoidable impurities.
The invention has the beneficial effects as follows: the present invention is used 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; The low basicity slag that can solve prior art medi-spring steel and cord steel external refining use is in production process easy erosion ladle that exists and the technical problem that is prone to caking; Can be when realizing the inclusion plastification; Effectively suppressing ladle corrodes; Produce that the Control and Inclusion Removal level is good, the spring steel and the cord steel wire rod of cold drawing superior performance, 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 external refining of present embodiment is with low basicity synthetic slag, and is 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 unavoidable impurities.
Embodiment 2
The external refining of present embodiment is with low basicity synthetic slag, and is 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 unavoidable impurities.
Embodiment 3
The external refining of present embodiment is with low basicity synthetic slag, and is 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 unavoidable impurities.
Embodiment 4
The external refining of present embodiment is with low basicity synthetic slag, and is 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 unavoidable impurities.
Embodiment 1-4 carries out the inclusion grading by GB/T 10561, and the result is as shown in the table:
Table 1
Except that the foregoing description, 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 (5)
1. an external refining is characterized in that: composed of the following components by weight percentage: CaO:30%～40%, SiO with low basicity synthetic slag
2: 35%～45%, Al
2O
3:≤5%, MgO:8%～15%, CaF
2: 6%～15%, FeO :≤2.0%, surplus is a unavoidable impurities, more than the sum of each component be 100%.
2. external refining as claimed in claim 1 is characterized in that: composed of the following components by weight percentage: CaO:37.27%, SiO with low basicity synthetic slag
2: 41.64%, Al
2O
3: 3.81%, MgO:8.86%, CaF
2: 6.78%, FeO:0.89%, surplus is other unavoidable impurities.
3. external refining as claimed in claim 1 is characterized in that: composed of the following components by weight percentage: CaO:39.33%, SiO with low basicity synthetic slag
2: 36.71%, Al
2O
3: 3.78%, MgO:10.53%, CaF
2: 7.62%, FeO:1.16%, surplus is other unavoidable impurities.
4. external refining as claimed in claim 1 is characterized in that: composed of the following components by weight percentage: CaO:30.52%, SiO with low basicity synthetic slag
2: 44.97%, Al
2O
3: 5.00%, MgO:9.10%, CaF
2: 9.03%, FeO:1.36%, surplus is other unavoidable impurities.
5. external refining as claimed in claim 1 is characterized in that: composed of the following components by weight percentage: CaO:31.42%, SiO with low basicity synthetic slag
2: 35.02%, Al
2O
3: 1.72%, MgO:14.88%, CaF
2: 14.95%, FeO:2.00%, surplus is other unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103858256A CN102382947B (en) | 2011-11-29 | 2011-11-29 | Low-basicity synthetic slag for external refining |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103858256A CN102382947B (en) | 2011-11-29 | 2011-11-29 | Low-basicity synthetic slag for external refining |
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| Publication Number | Publication Date |
|---|---|
| CN102382947A true CN102382947A (en) | 2012-03-21 |
| CN102382947B CN102382947B (en) | 2013-05-29 |
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ID=45822776
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| CN2011103858256A Active CN102382947B (en) | 2011-11-29 | 2011-11-29 | Low-basicity synthetic slag for external refining |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103243256A (en) * | 2013-05-28 | 2013-08-14 | 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 |
| CN103421930A (en) * | 2012-05-17 | 2013-12-04 | 张延大 | Novel tire cord steel refined material formula and preparation method thereof |
| 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 |
| CN110195145A (en) * | 2019-06-13 | 2019-09-03 | 中天钢铁集团有限公司 | One kind makes oxide in cord steel be mingled with vitrified refining slag |
| CN110904303A (en) * | 2019-10-31 | 2020-03-24 | 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 |
-
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 (3)
| Title |
|---|
| 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）》 * |
| 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》 * |
| 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》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103421930A (en) * | 2012-05-17 | 2013-12-04 | 张延大 | Novel tire cord steel refined material formula and preparation method thereof |
| 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 |
| CN103243256A (en) * | 2013-05-28 | 2013-08-14 | 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 |
| CN110195145A (en) * | 2019-06-13 | 2019-09-03 | 中天钢铁集团有限公司 | One kind makes oxide in cord steel be mingled with vitrified refining slag |
| 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 |
| CN110904303A (en) * | 2019-10-31 | 2020-03-24 | 邯郸钢铁集团有限责任公司 | Smelting method of rail steel |
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|---|---|
| CN102382947B (en) | 2013-05-29 |
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