Refractory castable for molten iron desulphurization stirrer

A refractory castable and molten iron desulfurization technology, applied in the field of refractory materials, can solve problems such as low bonding strength, structural spalling, and poor thermal shock stability of high-purity fused mullite castables, so as to improve thermal shock stability and improve The effect of flexural strength

Active Publication Date: 2015-01-28
中卫市胜金北拓建材有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] However, the prior art has the following problems: the existing high-purity fused mullite refractory castables cannot be sintered well under the actual temperature conditions of the agitator and the thermal shock stability of the high-purity fused mullite castables is relatively low. Poor, resulting in loose lining structure, low bonding strength, and slag penetration causing structural spalling, thus greatly shortening the service life of the molten iron desulfurization mixer

Method used

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Embodiment Construction

[0007] A refractory castable for a molten iron desulfurization mixer, which comprises the following components in parts by weight: 30-35 parts of silica, 20-25 parts of silicon carbide, 30-40 parts of magnesia fine powder, and 40-45 parts of alumina fine powder 20-25 parts of ferrite spinel, wherein silica, ferrite and silicon carbide are aggregates, magnesia fine powder and alumina fine powder are powder materials. Among them, silica, iron-aluminum spinel, and silicon carbide are used as aggregates to increase the flexural strength of refractory castables. At the same time, magnesia fine powder magnesia also reacts with alumina micropowder to form magnesia-alumina spinel to combine with silica , iron-aluminum spinel, and silicon carbide combine to improve the thermal shock stability of refractory castables.

[0008] Further, the aggregate includes coarse aggregate, medium aggregate, and fine aggregate. The particle diameter of the coarse aggregate is 2-3 mm, the particle diam...

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Abstract

The invention relates to a refractory castable for a molten iron desulphurization stirrer. The refractory castable comprises the following components in parts by weight: 30-35 parts of silica, 20-25 parts of silicon carbide, 30-40 parts of magnesia powder, 40-45 parts of alumina micro powder and 20-25 parts of hercynite, wherein the silica, the hercynite and the silicon carbide are aggregates and the magnesia powder and the alumina micro powder are powder.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a refractory castable for a molten iron desulfurization stirrer. Background technique [0002] At present, when metallurgical enterprises at home and abroad carry out stirring desulfurization outside the molten iron furnace before converter steelmaking, the desulfurization agitator used is mainly composed of an internal metal core rod and an external refractory lining, and most of the refractory materials used for the agitator lining are It is a high-purity mullite refractory castable. [0003] However, the prior art has the following problems: the existing high-purity fused mullite refractory castables cannot be sintered well under the actual temperature conditions of the agitator and the thermal shock stability of the high-purity fused mullite castables is relatively low. Poor, resulting in loose lining structure, low bonding strength, and slag penetra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/103C04B2235/3206C04B2235/3217C04B2235/3222C04B2235/3418C04B2235/3826C04B2235/5427
Inventor 穆祥王西来董伟胜
Owner 中卫市胜金北拓建材有限公司
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