CN103567422A - Casting powder for producing steel ingots by utilizing mould injection process - Google Patents
Casting powder for producing steel ingots by utilizing mould injection process Download PDFInfo
- Publication number
- CN103567422A CN103567422A CN201210261965.7A CN201210261965A CN103567422A CN 103567422 A CN103567422 A CN 103567422A CN 201210261965 A CN201210261965 A CN 201210261965A CN 103567422 A CN103567422 A CN 103567422A
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- CN
- China
- Prior art keywords
- molten steel
- steel
- casting powder
- covering slag
- injection process
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Abstract
The invention discloses casting powder for producing steel ingots by utilizing a mould injection process. The casting powder comprises the following chemical components by mass: 30-36% of SiO2, 5-12% of Al2O3, 15-23% of CaO, 15-21% of C, 2-6% of Fe2O3, 2-7% of MgO, and 2-6% of Na2O. The casting powder for producing the steel ingots by utilizing the mould injection process can evenly spread on the surface of molten steel quickly, therefore effectively plays a role of heat insulation, absorbs and fixes aluminum oxide sundries floating on the molten steel, keeps performance stable, is prevented from being involved into the molten steel after the performance is poor, and can improve surface quality of the steel ingots.
Description
Technical field
The present invention relates to a kind of field of metallurgy covering slag, relate in particular to a kind of steel ingot covering slag.
Background technology
At mould, note in the steel ingot production process of production line; peculiar characteristic due to molten steel solidification process; need to be by mold powder cover molten steel upper surface in ingot mould; play the effect of isolated air; prevent secondary oxidation, absorb the field trash that floats in molten steel, reduce molten steel to heat radiation in air, prevent that covering slag is involved in the medium effect of molten steel, thereby improve Ingot Surface Quality.
The covering slag of prior art is when the steel grade of cast aluminum content higher (aluminium content is at 0.5%～1.0wt%); covering slag is subject to the impact of aluminium element in molten steel; later stage at ingot steel casting can not cover molten steel upper surface completely; do not have the due effect of covering slag, affected the surface quality of steel ingot.
The chemical composition quality per distribution ratio of the covering slag of prior art is as shown in table 1.
Table 1
| Chemical composition | Quality per distribution ratio (%) |
| SiO 2(expanded perlite) | 37～44 |
| Al 2O 3(aluminium ash) | 15～20 |
| CaO(lime) | 5～14 |
| MgO | 0.5～5.5 |
| C(coke) | 15～20 |
| Fe 2O 3 | 2～7 |
Summary of the invention
The object of this invention is to provide a kind of mould that adopts and note the covering slag that explained hereafter steel ingot is used, it is applicable to bottom pouring of steel ingot mold and produces the higher steel grade material of aluminum content, can spread in uniformly molten steel upper surface in steel ingot, thereby improves the surface quality of steel ingot.
In order to realize object of the present invention, the invention provides a kind of mould that adopts and note the covering slag that explained hereafter steel ingot is used, the quality percentage composition of its chemical constituent is:
SiO
2： 30～36%；
Al
2O
3： 5～12%；
CaO： 15～23%；
C： 15～21%；
Fe
2O
3： 2～6%；
MgO： 2～7%；
Na
2O： 2～6%。
The design principle of the covering slag that employing mould notes explained hereafter steel ingot of the present invention is used is as follows:
SiO
2: SiO
2material of main part as covering slag is used, and has the features such as apparent density is light, thermal conductivity factor is low, chemical stability is good, good heat insulating due to it, utilizes it to form the foundation structure of covering slag melt, plays skeleton function, brings into play the effect of heat-insulation and heat-preservation simultaneously.
Al
2o
3: Al
2o
3with SiO
2basis of formation melt, and adjust the microstructure that slag melts rear melt, be conducive to covering slag and sprawl.
CaO:CaO and SiO
2basis of formation melt, and adjust the microstructure that slag melts rear melt, regulate the mobility of slag.
C:C can adjust the burn-off rate of covering slag.
Fe
2o
3: Fe
2o
3as the oxidant in covering slag.
MgO:MgO can adjust the microstructure after slag fusing, regulates the mobility of covering slag.
Na
2o:Na
2o, as the solvent of covering slag, can adjust the burn-off rate of slag.
The covering slag that employing mould notes explained hereafter steel ingot of the present invention is used is owing to having suitable proportion relation between each chemical constituent; after the mixture that each chemical constituent is formed is heated and dissolves in ingot steel casting process; formed the melt with specific microstructure; in this kind of melt, there are tetrahedron, hexahedron particle, between particle and particle, have slight void and link together.The burn-off rate with this microstructure melt is fast, can sprawl and come fast, effectively brings into play heat-blocking action.Simultaneously; the microstructure of this melt is more stable; after the aluminate floating up from molten steel enters this melt; can rapidly aluminate be fixed on to melt inside; and the character of melt self does not have greatly changed; the stability that keeps covering slag, is involved in by molten steel after the performance that prevents covering slag worsens and affects Ingot Surface Quality.
Employing mould of the present invention is noted the covering slag that explained hereafter steel ingot is used; can sprawl quickly and evenly at the higher molten steel upper surface of aluminum content; effectively bring into play heat-blocking action; the aluminate floating in absorption fixedly molten steel; the stability that keeps covering slag performance; prevent from by molten steel, being involved in after covering slag performance from worsening, improve Ingot Surface Quality.
The specific embodiment
Embodiment 1-5
Table 2 has shown each chemical constituent quality percentage composition proportioning in the specific embodiment 1-5 of the technical program.
Table 2.
| Chemical constituent | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| SiO 2 | 32 | 30 | 36 | 36 | 36 |
| Al 2O 3 | 12 | 12 | 12 | 6 | 7 |
| CaO | 21 | 23 | 15 | 23 | 23 |
| C | 20 | 21 | 21 | 21 | 15 |
| Fe 2O 3 | 6 | 6 | 4 | 2 | 6 |
| MgO | 7 | 2 | 6 | 7 | 7 |
| Na 2O | 2 | 6 | 6 | 5 | 6 |
In above-mentioned specific embodiment; at mould, pour down and water in process; after the covering slag of making according to the raw material of above-mentioned chemical composition proportioning is joined in ingot mould; covering slag melts rapidly; and can be fast in ingot mould upper surface sprawl and come; form thermal insulation layer, stop the heat of molten steel to transmit in air, brought into play the effect of insulation.The aluminate that covering slag after fusing floats up on adsorbing in molten steel simultaneously, until covering slag can keep good absorption property while being full of molten steel in ingot mould.
Be noted that above enumerate only for specific embodiments of the invention, obviously the invention is not restricted to above embodiment, have many similar variations thereupon.If all distortion that those skilled in the art directly derives or associates from content disclosed by the invention, all should belong to protection scope of the present invention.
Claims (1)
1. adopt mould to note the covering slag that explained hereafter steel ingot is used, it is characterized in that, the quality percentage composition of its chemical constituent is:
SiO
2： 30～36%；
Al
2O
3： 5～12%；
CaO： 15～23%；
C： 15～21%；
Fe
2O
3： 2～6%；
MgO： 2～7%；
Na
2O： 2～6%。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210261965.7A CN103567422A (en) | 2012-07-26 | 2012-07-26 | Casting powder for producing steel ingots by utilizing mould injection process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210261965.7A CN103567422A (en) | 2012-07-26 | 2012-07-26 | Casting powder for producing steel ingots by utilizing mould injection process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103567422A true CN103567422A (en) | 2014-02-12 |
Family
ID=50040621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210261965.7A Pending CN103567422A (en) | 2012-07-26 | 2012-07-26 | Casting powder for producing steel ingots by utilizing mould injection process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103567422A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104646650A (en) * | 2015-02-03 | 2015-05-27 | 舞阳钢铁有限责任公司 | Ultra-low carbon covering slag used for 50t-level large flat ingot die casting |
| CN108705049A (en) * | 2018-06-14 | 2018-10-26 | 西峡县西保冶金材料有限公司 | A kind of special Ultra-low carbon molding slag of P91 steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092003A (en) * | 1993-03-10 | 1994-09-14 | 首钢总公司 | The mould-casting compound slag of not carburetting |
| CN1122734A (en) * | 1994-11-11 | 1996-05-22 | 伍本华 | Composition bentonite protection slag |
| JPH08300125A (en) * | 1995-05-10 | 1996-11-19 | Kubota Corp | Flux for centrifugal casting of two-layered pipe |
| CN101116906A (en) * | 2006-07-31 | 2008-02-06 | 宝山钢铁股份有限公司 | Carbon-free casting powder for casting steel making die |
| CN102151812A (en) * | 2010-02-11 | 2011-08-17 | 宝山钢铁股份有限公司 | Freon-free environment-friendly continuous casting slag |
| CN102389955A (en) * | 2011-11-26 | 2012-03-28 | 重庆大学 | Crystallizer casting powder for high-aluminum steel continuous casting |
-
2012
- 2012-07-26 CN CN201210261965.7A patent/CN103567422A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092003A (en) * | 1993-03-10 | 1994-09-14 | 首钢总公司 | The mould-casting compound slag of not carburetting |
| CN1122734A (en) * | 1994-11-11 | 1996-05-22 | 伍本华 | Composition bentonite protection slag |
| JPH08300125A (en) * | 1995-05-10 | 1996-11-19 | Kubota Corp | Flux for centrifugal casting of two-layered pipe |
| CN101116906A (en) * | 2006-07-31 | 2008-02-06 | 宝山钢铁股份有限公司 | Carbon-free casting powder for casting steel making die |
| CN102151812A (en) * | 2010-02-11 | 2011-08-17 | 宝山钢铁股份有限公司 | Freon-free environment-friendly continuous casting slag |
| CN102389955A (en) * | 2011-11-26 | 2012-03-28 | 重庆大学 | Crystallizer casting powder for high-aluminum steel continuous casting |
Non-Patent Citations (2)
| Title |
|---|
| 孙秀春: "BT模注保护渣的试验研究", 《一重技术》 * |
| 金山同: "固体粉状保护渣", 《北京钢铁学院学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104646650A (en) * | 2015-02-03 | 2015-05-27 | 舞阳钢铁有限责任公司 | Ultra-low carbon covering slag used for 50t-level large flat ingot die casting |
| CN108705049A (en) * | 2018-06-14 | 2018-10-26 | 西峡县西保冶金材料有限公司 | A kind of special Ultra-low carbon molding slag of P91 steel |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140212 |