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Pre-melting type crystallizer casting powder for non-oriented silicon steel and preparation method thereof

A technology of mold flux and oriented silicon steel, applied in the field of metallurgy, can solve the problems of no application of non-oriented silicon steel, high thermal resistance of non-oriented silicon steel, increase of thermal resistance of steel, etc., so as to reduce heat transfer speed, inhibit SiO2 reaction, reduce The effect of crystallization temperature

Pending Publication Date: 2022-02-01
JIANGSU JIANAI HIGH TEMPERATURE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) Non-oriented silicon steel has high thermal resistance. Due to the high silicon content in silicon steel, the thermal resistance of the steel is increased, thereby reducing its thermal conductivity. Under the same mold slag conditions, the heat flow of the mold during the casting process is lower than that of other steels with the same amount of carbon. steel type
[0006] At present, although a number of invention patents for mold powder have been disclosed, there is no technology applied to non-oriented silicon steel

Method used

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  • Pre-melting type crystallizer casting powder for non-oriented silicon steel and preparation method thereof
  • Pre-melting type crystallizer casting powder for non-oriented silicon steel and preparation method thereof
  • Pre-melting type crystallizer casting powder for non-oriented silicon steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This example provides a pre-melted mold powder for non-oriented silicon steel. The raw materials include: 35 parts of pre-melted calcium silicate, 18 parts of quartz powder, 11 parts of albite, 3 parts of soda ash, sodium fluoride + ice crystals 11 parts of stone compound, 9 parts of 95 fluorite, 6 parts of lithium carbonate, 4 parts of manganese carbonate, 2 parts of mixed carbon, and the balance is dextrin. Separation, cooling, testing, and packaging to obtain mold powder for non-oriented silicon steel.

[0022] The physical and chemical indicators of mold slag for non-oriented silicon steel pre-melting mold are as follows:

[0023] Table 1

[0024]

[0025] Table 2

[0026]

Embodiment 2

[0028] This example provides a pre-melted mold powder for non-oriented silicon steel. The raw materials include: 34 parts of pre-melted calcium silicate, 19 parts of quartz powder, 9 parts of albite, 5 parts of soda ash, sodium fluoride + ice crystals 9 parts of stone compound, 10 parts of 95 fluorite, 4 parts of lithium carbonate, 5 parts of manganese carbonate, 3 parts of mixed carbon, and the balance is dextrin. Separation, cooling, testing, and packaging to obtain premelted mold powder for non-oriented silicon steel.

[0029] table 3

[0030]

[0031] Table 4

[0032]

Embodiment 3

[0034]This example provides a pre-melted mold powder for non-oriented silicon steel. The raw materials include: 33 parts of pre-melted calcium silicate, 19 parts of quartz powder, 10 parts of albite, 4 parts of soda ash, sodium fluoride + ice crystals 10 parts of stone compound, 10 parts of 95 fluorite, 5 parts of lithium carbonate, 5 parts of manganese carbonate, 2.5 parts of mixed carbon, and the balance is dextrin. Separation, cooling, testing, and packaging to obtain premelted mold powder for non-oriented silicon steel.

[0035] table 5

[0036]

[0037] Table 6

[0038]

[0039] In summary, the premelted mold mold powder for non-oriented silicon steel prepared by the present invention is well applied in a steel factory, the thickness of the slag layer is 8-12mm, the consumption is 0.6kg / t, no agglomeration, and the crystallizer expert curve is stable , heat flux 1.0-1.1NW / m 2 , the surface of the slab is normal, the vibration marks on the surface of the slab are ...

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Abstract

The invention discloses pre-melting type crystallizer casting powder for non-oriented silicon steel, and relates to the technical field of metallurgy. The casting powder comprises the following chemical components in percentage by mass: 25.2%-25.6% of CaO, 39.2%-39.6% of SiO2, 1.9%-2.1% of MgO, 2.9%-3.1% of Al2O3, 10.5%-10.7% of Na2O+K2O, 9.9%-10.1% of F, 1.9%-2.1% of Li2O, 2.0%-2.2% of MnO, 1.9%-2.1% of solid C and the balance of inevitable impurities, the melting point is 1000-1040 DEG C, the viscosity at 1300 DEG C is 0.18-0.19 Pa.S, and hollow particles are prepared through spray granulation. The prepared non-oriented silicon steel crystallizer casting powder is hollow particles, the bulk specific weight is light, the spreadability is improved through the hollow particles, the hollow sphere particles subjected to spray granulation can form a heat insulation layer, the outward heat transfer speed of molten steel can be effectively reduced, and the heat insulation effect is good.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a pre-melted mold powder for non-oriented silicon steel and a preparation method thereof. Background technique [0002] Some steels in non-oriented silicon steel contain high aluminum content. During continuous casting, Al in steel and SiO in mold powder 2 The reaction occurs, which greatly changes the characteristics of the mold flux. Abnormal situations such as steel leakage often occur thus and affect production. Casting characteristics of high-alumina non-oriented silicon steel and problems to be solved Generally speaking, the range of adding aluminum is 0.8%-1.2%. Therefore, during continuous casting, aluminum in steel and SiO in mold flux 2 The following reaction occurs: 4Al+3SiO 2 →2Al 2 o 3 +3Si(1). Due to this reaction, the composition of mold flux slag changes greatly, Al 2 o 3 increase sharply, SiO 2 sharp reduction and consequent CaO / SiO 2 The rise, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 冯为民侴宏晔单以钢尹玉服黄健史朝霞王丁丁王冉
Owner JIANGSU JIANAI HIGH TEMPERATURE MATERIAL
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