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Submerged arc refining slag and preparation method thereof

A technology for refining slag and blast furnace water slag, which is applied in the field of submerged arc refining slag and its preparation, can solve the problems of difficult control and poor composition stability, and achieve the effects of improving the working environment, fast slag formation, and reducing arc and noise pollution

Inactive Publication Date: 2011-10-19
ZHENGZHOU DONGSHENG METALLURGY NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that in the LF furnace smelting process, the control of deoxidation, carbon, silicon and alloy components is difficult, the stability of the components is poor, and the secondary oxidation of the molten steel is prevented, and a submerged arc refining slag is provided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A submerged arc refining slag, which is made of the following raw materials in parts by weight: 40 kg of cooked bauxite, 2 kg of metal aluminum powder, 12 kg of silicon carbide, 4 kg of high-carbon powder, 45 kg of limestone, and blast furnace slag 3 kg, 4 kg of lignin, Al in the described cooked bauxite 2 o 3 The mass fraction of Al is 85%, the mass fraction of Al in the described metal aluminum powder is 99.9%, the mass fraction of SiC in the described silicon carbide is 97%, the mass fraction of C in the described high carbon powder is 98%, the described The mass fraction of CaO in the limestone is 55%, the mass fraction of MgO is 1.0%, and the SiO in the blast furnace slag 2 The mass fraction of CaO is 21%, the mass fraction of CaO is 44%, and the mass fraction of Al 2 o 3 The mass fraction is 18%.

[0011] The preparation method of the submerged arc refining slag: the raw materials are pulverized, and the particle size of the powder is 150 mesh. After stirring ...

Embodiment 2

[0013] A submerged arc refining slag, which is made of the following raw materials in parts by weight: 35 kg of cooked bauxite, 1 kg of metal aluminum powder, 8 kg of silicon carbide, 2 kg of high-carbon powder, 40 kg of limestone, and blast furnace slag 1 kg, lignin 2 kg, Al 2 o 3 The mass fraction of Al is 90%, the mass fraction of Al in the described metal aluminum powder is 99.9%, the mass fraction of SiC in the described silicon carbide is 98%, the mass fraction of C in the described high carbon powder is 99%, the described The mass fraction of CaO in the limestone is 55%, the mass fraction of MgO is 0.5%, and the SiO in the blast furnace slag 2 The mass fraction of CaO is 15%, the mass fraction of CaO is 40%, Al 2 o 3 The quality fraction of is 13%.

[0014] The preparation method of the submerged arc refining slag: the raw materials are pulverized, and the particle size of the powder is 150 mesh. After stirring and mixing, the extrusion granulator is used to granula...

Embodiment 3

[0016] A submerged arc refining slag, which is made of the following raw materials in parts by weight: 38 kg of cooked bauxite, 2 kg of metal aluminum powder, 12 kg of silicon carbide, 2 kg of high-carbon powder, 45 kg of limestone, and blast furnace slag 1 kg, lignin 4 kg, Al in the cooked bauxite 2 o 3 The mass fraction of Al is 92%, the mass fraction of Al in the described metal aluminum powder is 99.9%, the mass fraction of SiC in the described silicon carbide is 99%, the mass fraction of C in the described high carbon powder is 99%, the described The mass fraction of CaO in the limestone is 55%, the mass fraction of MgO is 0.6%, and the SiO in the blast furnace slag 2 The mass fraction of CaO is 16%, the mass fraction of CaO is 42%, and the mass fraction of Al 2 o 3 The quality fraction of is 16%.

[0017] The preparation method of the submerged arc refining slag: the raw materials are pulverized, and the particle size of the powder is 140 mesh. After stirring and mix...

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Abstract

The invention discloses submerged arc refining slag, which is prepared from the following raw materials in part by weight: 35 to 40 parts of sintered bauxite, 1 to 2 parts of metal aluminum powder, 8 to 12 parts of silicon carbide, 2 to 4 parts of high carbon powder, 40 to 45 parts of limestone, 1 to 3 parts of blast furnace grain slag and 2 to 4 parts of lignin. In the invention, deoxygenation, submerged arc foaming and refining are integrated, production process is simplified, working environment is improved, the stability of ingredients of molten steel is improved, smelting cost is lowered, refining time is reduced, yield of expensive metal is increased, secondary oxidization of molten steel is relieved, the recovery rate of molten steel is increased, arc and noise pollution are reduced and the service life of refractory materials is prolonged.

Description

technical field [0001] The invention relates to a submerged arc refining slag and a preparation method thereof. Background technique [0002] During the smelting process of the LF furnace, it is difficult to control deoxidation, carbon, silicon and alloy components, the stability of the components is poor, and the secondary oxidation of the molten steel is prevented. Contents of the invention [0003] The technical problem to be solved by the present invention is that in the LF furnace smelting process, it is difficult to control deoxidation, carbon, silicon and alloy components, the stability of the components is poor, and the secondary oxidation of the molten steel is prevented by absorbing gas from the molten steel, so as to provide a submerged arc refining slag. [0004] The technical solution of the present invention is: a submerged arc refining slag, which is made of the following raw materials in parts by weight: cooked bauxite 35-40, metal aluminum powder 1-2, sili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 慕永军
Owner ZHENGZHOU DONGSHENG METALLURGY NEW MATERIAL
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