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A kind of anti-stick slag coating for water beam insulation lining of hot rolling heating furnace

A technology of anti-sticking slag coating and thermal insulation lining, which is applied in the field of refractory materials, can solve the problems affecting the production efficiency and cost of heating furnaces, and achieve the effects of improving anti-sticking slag ability, inhibiting penetration, preventing penetration and erosion

Active Publication Date: 2021-03-16
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Based on the above deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an anti-sticking slag coating for the thermal insulation lining of the water girder of the hot-rolled heating furnace, so as to solve the problem of sticky slag in the refractory thermal insulation lining of the water beam and column of the hot-rolled heating furnace. The slag hanging affects the production efficiency and cost of the heating furnace. The anti-slag coating used for the thermal insulation lining of the water beam of the hot-rolled heating furnace is suitable for the working conditions of high-proportion iron oxide content steel slag, and can prevent the water beam and column of the heating furnace from sticking. Slag hanging slag to reduce the maintenance cost of the heating furnace, improve the production efficiency of the heating furnace, and prolong the service life of the refractory insulation lining of the water beam and column of the heating furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An anti-sticking slag coating that can be used for thermal insulation linings of water beams and columns of hot-rolled heating furnaces. The raw material composition and weight percentage content are as follows:

[0027] 40% forsterite, 25% sintered magnesia, 1% raw bauxite fine powder, 10% active α-Al 2 o 3 Micropowder, 20% silica sol, 3% silicon carbide powder and 1% flake graphite.

[0028] Wherein, the 2MgO·SiO in the forsterite 2 content>95%, 0.07595%.

[0029] The particle size of the raw alumina fine powder is ≤0.075mm; the particle size of silicon carbide is ≤0.045mm, the SiC content is ≥97%; and the particle size of flake graphite is ≤0.045mm. SiO in the silica sol 2 The content is 40-41%.

Embodiment 2

[0031] An anti-sticking slag coating that can be used for the thermal insulation lining of water beams and columns of hot-rolled heating furnaces. Its raw material composition and weight percentage content are:

[0032] 45% forsterite, 15% sintered magnesia, 1% raw bauxite fine powder, 10% active α-Al 2 o 3 Micropowder, 25% silica sol, 3% silicon carbide powder and 1% flake graphite.

[0033] Wherein, the 2MgO·SiO in the forsterite 2 content>95%, 0.07595%.

[0034] The particle size of the raw alumina fine powder is ≤0.075mm; the particle size of silicon carbide is ≤0.045mm, the SiC content is ≥97%; and the particle size of flake graphite is ≤0.045mm. SiO in the silica sol 2 The content is 40-41%.

Embodiment 3

[0036] An anti-sticking slag coating that can be used for the thermal insulation lining of water beams and columns of hot-rolled heating furnaces. Its raw material composition and weight percentage content are:

[0037] 50% forsterite, 15% sintered magnesia, 1% raw bauxite fine powder, 15% active α-Al 2 o 3 Micropowder, 10% silica sol, 3% silicon carbide powder and 1% flake graphite.

[0038] Wherein, the 2MgO·SiO in the forsterite 2 content>95%, 0.07595%.

[0039] The particle size of the raw alumina fine powder is ≤0.075mm; the particle size of silicon carbide is ≤0.045mm, the SiC content is ≥97%; and the particle size of flake graphite is ≤0.045mm. The content of SiO2 in the silica sol is 40-41%.

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Abstract

The invention discloses an anti-slag-adhesion coating for a thermal insulation lining of a water beam of a hot rolling heating furnace. The anti-slag-adhesion coating is prepared from the following raw materials in percentage by weight: 40-55% of forsterite, 15-25% of sintered magnesia, 1-4% of raw alumina fine powder, 8-15% of active alpha-Al2O3 micro-powder, 10-25% of silica sol, 3-6% of siliconcarbide micro-powder and 1-3% of flake graphite. The anti-slag-adhesion coating is suitable for working conditions of steel slag with high-proportion iron oxide content, the direct contact between the refractory thermal insulation lining for the water beam and a stand column and iron oxide molten slag is isolated, so that permeation and erosion of the iron oxide molten slag can be prevented, thefreezing point of the iron oxide molten slag at the interface of the coating is reduced, the smooth flowing of the molten slag is facilitated, and therefore slag adhesion of the refractory thermal insulation lining can be effectively inhibited, clearing and maintaining are facilitated, the service life of the refractory thermal insulation lining is prolonged, and the production efficiency and thequality of billets are conveniently improved.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to an anti-sticking slag coating used for the thermal insulation lining of water beams of hot-rolled heating furnaces. Background technique [0002] When the continuous casting slab is heat treated in the heating furnace, due to the large oxidation and burning loss of the slab, the liquid slag of various eutectic metal oxides formed by oxidation will continuously flow into the furnace. During the process of slag flowing downward along the water beam and column of the heating furnace, the oxide slag will contact, infiltrate and chemically react with the high-alumina refractory castable insulation lining wrapped around the water beam and column, causing the slag to stick and solidify and continuously When it grows up, it even forms a curtain of hanging slag, which blocks the flame flow of the lower burner, deteriorates the uniformity of the heating temperature of the bill...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/20
CPCC04B35/20C04B35/66C04B2235/3206C04B2235/3217C04B2235/3418C04B2235/3826C04B2235/425C04B2235/5427C04B2235/5436C04B2235/9669
Inventor 杜贤武丁翠娇曹炳雷宋中华韩斌
Owner 武汉钢铁有限公司
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