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Aluminium-silica type refined pre-smelting slag

A technology of pre-melting slag and refining slag, which is applied in the field of smelting, can solve the problems of outstanding quality of inclusions, high unqualified rate of sulfides, low success rate of continuous casting and continuous casting, etc., and achieve high level of adsorption of inclusions, stable yield The effect of low yield and fluorine content

Inactive Publication Date: 2012-02-08
丹东泓辉科大高温材料有限公司
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Problems solved by technology

[0002] In the production of high-grade bearing steel, the quality of inclusions is prominent and fluctuates greatly; in the production of medium (high) sulfur structural steel, the success rate of continuous casting and continuous casting is extremely low (only about 30%), and the failure rate of sulfide is high

Method used

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  • Aluminium-silica type refined pre-smelting slag

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Embodiment Construction

[0011] The three raw materials of waste glass, fly ash and 65% waste high-alumina bricks are respectively crushed by crushing equipment to the specified particle size (5mm-15mm) for melting in an electric furnace---weigh the raw materials according to the ratio in Table 1-- -The weighed raw material + borax (fluxing agent) is mixed by the mixing equipment---the mixed raw material is put into the electric furnace and melted to form the refined pre-melted slag---the melted refined pre-melted slag block is crushed to the particle size specified by the finished product (15mm-20mm) --- Product chemical composition testing --- Qualified products are put into storage.

[0012] Table 1

[0013] serial number

waste glass

fly ash

65% waste high alumina brick

Borax

1

10

33

55

2

2

25

25

47

3

3

19

45

35

1

4

30

28

40

2

[0014] ...

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Abstract

The present invention discloses an aluminium-silica type refined pre-smelting slag, which is provided for solving the problems of prominent foreign material quality problem and the large fluctuation during a high-grade bearing steel producing process, low continuous casting success rate (only about 30%) during a middle (high) sulfur structure steel producing process, and high unqualified rate of the sulfide. The aluminium-silica type refined pre-smelting slag comprises the following components, by weight, 10.0-30.0% of waste glass, 25.0-45.0% of fly ash, 35.0-55.0% of 65% waste high alumina brick and 1.0-3.0% of a fluxing agent. The aluminium-silica type refined pre-smelting slag has the following advantages that: (1) the slag system is stable, and the slag adjusting process is not required; (2) the level for controling the non-metallic foreign material in the adsorption steel is high; (3) the slag does not agglomerate, the melting and slaggling time is short (less than or equal to 2 minutes); (4) the yield of the sulfur of the middle (high) sulfur structure steel during the later stage sulfur adjusting process is stable; (4) the product does not powder, and the shelf life is more than six months.

Description

technical field [0001] The invention relates to the field of smelting, in particular to a pre-melted slag for iron and steel smelting. Background technique [0002] In the production of high-grade bearing steel, the quality of inclusions is prominent and fluctuates greatly; in the production of medium (high) sulfur structural steel, the success rate of continuous casting and continuous casting is extremely low (only about 30%), and the failure rate of sulfide is high. Contents of the invention [0003] In order to solve the above technical problems, the applicant has developed an aluminum-silicon-based refining pre-melted slag, which is smelted by adding a variety of modifiers using a special process. The specific plan is: [0004] A pre-melted refining slag has the following components by weight: 10.0-30.0% of waste glass; 25.0-45.0% of fly ash; 35.0-55.0% of 65% waste high alumina brick; 1.0-3.0% of flux. [0005] SiO in the composition of the waste glass 2 ≥72.0%; Al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 冯为民杜治宝李钢周伟基薄永明
Owner 丹东泓辉科大高温材料有限公司
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