High-strength anti-stripping industrial kiln castable and preparation method thereof

By using materials such as white corundum, modified corundum, and petalite to form a dense packing structure, and by improving the lattice strength and interfacial bonding force through modification treatment, the high-temperature strength and thermal shock resistance spalling problems of industrial kiln castables are solved, achieving efficient spalling resistance and long service life of kiln linings.

CN121494590BActive Publication Date: 2026-03-20SHANDONG LUMING NEW MATERIALS
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Patent Information

Application Number
CN202610036823.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-13
Publication Date
2026-03-20
Estimated Expiration
2046-01-13

AI Technical Summary

Technical Problem

Existing industrial kiln castables are insufficient in terms of high-temperature strength and thermal shock resistance, leading to structural deformation, cracking, and spalling, which affects their service life.

Method used

White corundum, modified corundum, and lithium feldspar are used as aggregates, and composite micro powder and modified micro powder are added to improve high-temperature compressive strength by forming a dense packing structure and lattice distortion. The surface of nano-titanium diboride is coated with sol-gel method to enhance interfacial bonding force and reduce porosity and thermal expansion.

Benefits of technology

It significantly improves the high-temperature compressive strength and thermal shock resistance of castables, extends the service life of kiln linings, and reduces equipment and labor costs.

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Abstract

The application belongs to the technical field of refractory materials, and particularly relates to high-strength anti-stripping industrial kiln castable and a preparation method thereof. The industrial kiln castable provided by the application comprises white corundum, modified corundum, petalite, composite micropowder, modified micropowder, a binder and sodium hexametaphosphate. The white corundum, the modified corundum and the petalite are used as aggregates of the kiln castable, the composite micropowder and the nano micropowder are added to fill the aggregate gaps, and the porosity of the castable is reduced. The titanium dioxide is used to dope the corundum to form a solid solution, and a silica ceramic layer is coated on the surface of the nano titanium diboride by using a sol-gel method, so that the interface bonding force between the nano titanium diboride and the matrix is strengthened, the rigid reinforcing points are increased, and the high-temperature compressive strength is improved.
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