Steel ladle castable and preparation method thereof

By optimizing the particle size distribution and catalyst, the structural looseness problem of the ladle castable caused by the secondary mullite phenomenon triggered by the decomposition of zircon was solved, achieving efficient thermal shock and erosion resistance and reducing production costs.

CN120622939APending Publication Date: 2025-09-12DACHENG COUNTRY HONGDAGAOWEN MATERIAL CO LTD
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Patent Information

Application Number
CN202510959728.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-11
Publication Date
2025-09-12

AI Technical Summary

Technical Problem

The secondary mullite phenomenon caused by the decomposition of zircon in existing ladle castables leads to a loose structure, which weakens its corrosion resistance and thermal shock stability.

Method used

The method adopts fused corundum, sintered magnesia, fused magnesia, calcium aluminate cement, silica powder, sodium tripolyphosphate, sodium hexametaphosphate, zircon, composite expanded graphite, phenolic resin, chelating agent and other raw materials, adopts granular microporous structure, adopts first expanded graphite and second expanded graphite of different flake sizes, phenolic resin, expanded graphite, phenolic resin, chelating agent and the like, optimizes pore structure by particle size grading, uses composite catalyst of different materials, optimizes pore structure by particle size grading optimization method, uses different flake size structure, optimizes pore structure, forms a denser network, improves overall density of material, and improves thermal shock resistance and erosion resistance of ladle castable.

Benefits of technology

It improves the thermal shock resistance and corrosion resistance of the ladle castable, enhances the structural density and construction performance of the material, and reduces production costs.

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Abstract

The invention relates to the technical field of castable, and provides a steel ladle castable and a preparation method thereof. The steel ladle castable is prepared from the following components in parts by weight: 72 to 95 parts of fused corundum, 2 to 5 parts of magnesite clinker, 1 to 5 parts of fused magnesia, 4.5 to 6 parts of calcium aluminate cement, 2 to 3 parts of silica powder, 0.05 to 0.15 part of sodium tripolyphosphate, 0.1 to 0.2 part of sodium hexametaphosphate, 4 to 6 parts of zirconite, 1 to 8 parts of composite expanded graphite, 3 to 5 parts of phenolic resin and 3 to 5 parts of chelating agent, the scale sizes of the first expanded graphite and the second expanded graphite are different. According to the technical scheme, the problem that in the prior art, due to the secondary mullitization phenomenon caused by zirconite decomposition, the castable structure becomes loose, and the erosion resistance and the thermal shock resistance of the steel ladle castable are weakened is solved.
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