CN104313251B - A kind of refining slag applying high-carbon steel to produce - Google Patents
A kind of refining slag applying high-carbon steel to produce Download PDFInfo
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- CN104313251B CN104313251B CN201410512749.4A CN201410512749A CN104313251B CN 104313251 B CN104313251 B CN 104313251B CN 201410512749 A CN201410512749 A CN 201410512749A CN 104313251 B CN104313251 B CN 104313251B
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- refining slag
- refining
- calcite
- wollastonite
- carbon steel
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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
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Abstract
The present invention relates to a kind of refining slag applying high-carbon steel to produce, it is characterized in that: this refining slag refers to dry lime, wollastonite, calcite, fluorite respectively first with flash dryer, when its water content is below 1%, it is crushed to 150 mesh respectively, then lime that percentage by weight is 42 ~ 45%, the wollastonite of 32 ~ 35%, the calcite of 18 ~ 20%, the fluorite of 3 ~ 5% are mixed, obtain compound；Described compound is when dribbling balling machine shaping to particle size diameter is 2 ~ 15mm, heat in loading the saggar of diplopore kiln car formula electrical kiln and sending into electrical kiln, roasting under conditions of temperature is 1250 DEG C, naturally cool down after 50 ~ 60min, divide through 100 mesh sieves after, must become to be grouped into Al2O3＜ 5%, MgO ＜ 5%, CaO 55 ~ 58%, Fe2O3＜ 1%, SiO2 20~25%、CaF2＜ 10%, H2The graininess refining slag product of O ＜ 1%.The present invention can effectively remove steel inclusion, is primarily adapted for use between 60# ~ 82B trade mark in all high-carbon steel comprised refining LF ring joint.
Description
Technical field
The present invention relates to technical field of steel production, particularly relate to a kind of refining slag applying high-carbon steel to produce.
Background technology
Along with the needs of steel industry development, the highest to the needs of high-quality steel, high-quality steel requires to drop as much as possible
Low impurity content, reduces the inclusion content in molten steel；In addition the size of field trash, shape and deformability etc. all can shadows
Ringing the fatigue behaviour of steel, globular inclusion is indeformable when hot-working, and the harm to fatigue life is maximum, to fatigue behaviour requirement
Higher steel grade, it usually needs control indeformable calcium-aluminate globular inclusion, refining slag refining process serve insulation,
Deoxidation, desulfurization and the absorption effect such as steel inclusion and inclusion modification.Therefore, suitably refining is selected according to different steel grades
Slag system and refining slag are extremely important, and refining slag composition proportion plays to closing weight for the control of steel inclusion with reference to refining slag system
The effect wanted, and refining process is for the control of refining slag system, is directly connected to the control level of refinery practice, refining slag system
Adjust and rely primarily on the Composition Control of refining slag self and smelt steel inclusion.
Show that basicity is more and more obvious on the impact of refining effect by industrial experiment, directly affect the number of steel inclusion
Amount, form and gas content.Basicity is the highest more is conducive to deoxidation, and when basicity is about 4, refining slag nearly reaches maximum adsorption
Field trash and deoxidizing capacity.Along with the increase of basicity, the form of steel inclusion also changes, large-scale spherical calcium-aluminate
Field trash has obtained a certain degree of control.
Summary of the invention
The technical problem to be solved is to provide the application high-carbon steel of a kind of effective removal steel inclusion and produces
Refining slag.
For solving the problems referred to above, a kind of refining slag applying high-carbon steel to produce of the present invention, it is characterised in that: this essence
Refining slag refers to dry lime, wollastonite, calcite, fluorite respectively first with flash dryer, when its water content is equal
During less than 1%, be crushed to 150 mesh respectively, then by lime that percentage by weight is 42 ~ 45%, the wollastonite of 32 ~ 35%, 18
The calcite of ~ 20%, the fluorite of 3 ~ 5% mix, and obtain compound；Described compound is straight to granularity through dribbling balling machine shaping
When footpath is 2 ~ 15mm, heat, at the bar that temperature is 1250 DEG C in loading the saggar of diplopore kiln car formula electrical kiln and sending into electrical kiln
Roasting under part, cooling naturally after 50 ~ 60min, after divide through 100 mesh sieves, must become to be grouped into Al2O3＜ 5%, MgO ＜ 5%,
CaO 55~58%、Fe2O3＜ 1%, SiO2 20~25%、CaF2＜ 10%, H2The graininess refining slag product of O ＜ 1%.
The present invention compared with prior art has the advantage that
1, the refining slag of gained of the present invention, the refining slag used than ever mutually, from composition proportion and performance evaluation, its composition
Middle Al2O3Comparision contents low, basicity is high.Its performance is more beneficial for the removal of steel inclusion, and owing to rising in composition proportion
Al2O3Content is low, and the content of brittle inclusion in steel is had obvious reduction trend.
2, the present invention is under conditions of ensureing refining slag basicity, the content of aluminum oxide in conservative control slag；In satisfied refining
In slag desulfurization, the limit of power that is mingled with of absorption, suitably control the scope of basicity in slag, prevent that basicity is too high causes calciate to be mingled with
Formation；By in slag composition proportioning adjust, beneficially field trash changes to moulding district so that this refining slag for
The production of high-carbon steel is more favourable, more can reduce the generation amount of brittle inclusion in steel, and the requirement that more can meet postorder drawing (sees
Table 1).
Table 1
3, the present invention is mainly suitable for all high-carbon steel comprised between 60# ~ 82B trade mark refine LF ring joint.
Detailed description of the invention
1 one kinds of refining slags applying high-carbon steel to produce of embodiment, this refining slag refers to first with flash dryer stone
Ash, wollastonite, calcite, fluorite are dried respectively, when its water content is below 1%, are crushed to 150 mesh respectively, so
After lime that percentage by weight (kg/kg) is 42%, the wollastonite of 35%, the calcite of 20%, the fluorite of 3% are mixed,
To compound；Compound, when dribbling balling machine shaping to particle size diameter is 2 ~ 15mm, loads the saggar of diplopore kiln car formula electrical kiln
And heat in sending into electrical kiln, roasting under conditions of temperature is 1250 DEG C, cooling naturally after 50 ~ 60min, after through 100
Mesh sieve divides, and must become to be grouped into Al2O3＜ 5%, MgO ＜ 5%, CaO 55 ~ 58%, Fe2O3＜ 1%, SiO2 20~25%、CaF2＜
10%、H2The graininess refining slag product of O ＜ 1%.
2 one kinds of refining slags applying high-carbon steel to produce of embodiment, this refining slag refers to first with flash dryer stone
Ash, wollastonite, calcite, fluorite are dried respectively, when its water content is below 1%, are crushed to 150 mesh respectively, so
After lime that percentage by weight (kg/kg) is 45%, the wollastonite of 32%, the calcite of 18%, the fluorite of 5% are mixed,
To compound；Compound, when dribbling balling machine shaping to particle size diameter is 2 ~ 15mm, loads the saggar of diplopore kiln car formula electrical kiln
And heat in sending into electrical kiln, roasting under conditions of temperature is 1250 DEG C, cooling naturally after 50 ~ 60min, after through 100
Mesh sieve divides, and must become to be grouped into Al2O3＜ 5%, MgO ＜ 5%, CaO 55 ~ 58%, Fe2O3＜ 1%, SiO2 20~25%、CaF2＜
10%、H2The graininess refining slag product of O ＜ 1%.
3 one kinds of refining slags applying high-carbon steel to produce of embodiment, this refining slag refers to first with flash dryer stone
Ash, wollastonite, calcite, fluorite are dried respectively, when its water content is below 1%, are crushed to 150 mesh respectively, so
After lime that percentage by weight (kg/kg) is 43%, the wollastonite of 34%, the calcite of 19%, the fluorite of 4% are mixed,
To compound；Compound, when dribbling balling machine shaping to particle size diameter is 2 ~ 15mm, loads the saggar of diplopore kiln car formula electrical kiln
And heat in sending into electrical kiln, roasting under conditions of temperature is 1250 DEG C, cooling naturally after 50 ~ 60min, after through 100
Mesh sieve divides, and must become to be grouped into Al2O3＜ 5%, MgO ＜ 5%, CaO 55 ~ 58%, Fe2O3＜ 1%, SiO2 20~25%、CaF2＜
10%、H2The graininess refining slag product of O ＜ 1%.
4 one kinds of refining slags applying high-carbon steel to produce of embodiment, this refining slag refers to first with flash dryer stone
Ash, wollastonite, calcite, fluorite are dried respectively, when its water content is below 1%, are crushed to 150 mesh respectively, so
After by lime that percentage by weight (kg/kg) is 44%, the wollastonite of 33%, the calcite of 18.5%, 4.5% fluorite mixing all
Even, obtain compound；Compound, when dribbling balling machine shaping to particle size diameter is 2 ~ 15mm, loads diplopore kiln car formula electrical kiln
Saggar also heats in sending into electrical kiln, roasting under conditions of temperature is 1250 DEG C, cooling naturally after 50 ~ 60min, after warp
100 mesh sieves divide, and must become to be grouped into Al2O3＜ 5%, MgO ＜ 5%, CaO 55 ~ 58%, Fe2O3＜ 1%, SiO2 20~25%、CaF2
＜ 10%, H2The graininess refining slag product of O ＜ 1%.
Claims (1)
1. the refining slag applying high-carbon steel to produce, it is characterised in that: this refining slag refers to first with flash dryer pair
Lime, wollastonite, calcite, fluorite are dried respectively, when its water content is below 1%, are crushed to 150 mesh respectively,
Then by lime that percentage by weight is 42 ~ 45%, the wollastonite of 32 ~ 35%, the calcite of 18 ~ 20%, 3 ~ 5% fluorite mixing all
Even, obtain compound；Described compound, when dribbling balling machine shaping to particle size diameter is 2 ~ 15mm, loads diplopore kiln car formula electricity
The saggar of kiln also heats in sending into electrical kiln, roasting under conditions of temperature is 1250 DEG C, cooling naturally after 50 ~ 60min,
Divide by 100 mesh sieves, must become to be grouped into Al2O3＜ 5%, MgO ＜ 5%, CaO 55 ~ 58%, Fe2O3＜ 1%, SiO2 20~25%、
CaF2＜ 10%, H2The graininess refining slag product of O ＜ 1%.
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| CN201410512749.4A CN104313251B (en) | 2014-09-29 | 2014-09-29 | A kind of refining slag applying high-carbon steel to produce |
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| CN201410512749.4A CN104313251B (en) | 2014-09-29 | 2014-09-29 | A kind of refining slag applying high-carbon steel to produce |
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| CN104313251A CN104313251A (en) | 2015-01-28 |
| CN104313251B true CN104313251B (en) | 2016-08-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108570533B (en) * | 2018-05-17 | 2019-11-15 | 山东钢铁股份有限公司 | A kind of deoxidation slag charge suitable for Si killed steel |
| CN111304399B (en) * | 2020-03-27 | 2020-11-17 | 天津天钢联合特钢有限公司 | Use method of refining slag for converter smelting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425780A (en) * | 2003-01-20 | 2003-06-25 | 北京科技大学 | Refining desulfurizing dreg system and desulfurizing process for producing extremely low sulfur steel |
| CN1526493A (en) * | 2003-09-19 | 2004-09-08 | 宜兴振球炉料有限公司 | Douring basket protecting slag for continuous casting and its prepn |
| CN101736114A (en) * | 2008-11-19 | 2010-06-16 | 攀钢集团研究院有限公司 | Composition for slag formation and preparation and use method thereof |
| CN103276121A (en) * | 2013-04-24 | 2013-09-04 | 新疆八一钢铁股份有限公司 | Safety process capable of reducing explosion in hot disintegrating explosion of steel slag |
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- 2014-09-29 CN CN201410512749.4A patent/CN104313251B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425780A (en) * | 2003-01-20 | 2003-06-25 | 北京科技大学 | Refining desulfurizing dreg system and desulfurizing process for producing extremely low sulfur steel |
| CN1526493A (en) * | 2003-09-19 | 2004-09-08 | 宜兴振球炉料有限公司 | Douring basket protecting slag for continuous casting and its prepn |
| CN101736114A (en) * | 2008-11-19 | 2010-06-16 | 攀钢集团研究院有限公司 | Composition for slag formation and preparation and use method thereof |
| CN103276121A (en) * | 2013-04-24 | 2013-09-04 | 新疆八一钢铁股份有限公司 | Safety process capable of reducing explosion in hot disintegrating explosion of steel slag |
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