Ceramic anchoring nail for castable liner

Abstract

The invention discloses a ceramic anchoring nail for a castable liner. A nail body of the anchoring nail is formed by sintering a composite toughening ceramic material comprising 90%-96.3% of Al2O3 and 3.7%-10% of ZrO2, and a base nail is made of metal. The base nail is welded on a wall plate of equipment and is in threaded connection with a ceramic nail body. The characteristics that the ceramic material cannot be corroded and can resist high temperature, the strength of the ceramic material is hardly changed along with change of temperature, and the heat conductivity factor of the ceramic material is greatly lower than that of metal are sufficiently utilized, so that the temperature of the outer wall of the equipment is obviously reduced on the premise of not reducing the strength of an anchoring part and the adhesive force of the liner, the heat dissipation loss of the equipment is reduced effectively, and the purpose of saving energy is achieved. Besides, the utilization quantity of the metal is greatly saved, and the investment cost of the equipment is lowered.

Description

technical field [0001] The invention relates to a ceramic anchor nail used for castable lining. [0002] Background technique [0003] Traditional anchor nails used for castable linings are all made of metal. Due to the inherent properties of metal, metal anchors have the following disadvantages: [0004] 1. Easily corroded; [0005] 2. The strength changes greatly with temperature, so it is limited by the use temperature. The higher the use temperature, the higher the material and the higher the cost; [0006] 3. The thermal conductivity is relatively large, and the arrangement of the anchor nails on the equipment wall is relatively dense, so the temperature of the outer wall of the equipment is relatively high; [0007] 4. The coefficient of thermal expansion is much larger than that of castables. When used in a high temperature state, if there is no treatment in advance, there is a possibility that the castable lining will be cracked. [0008] Contents of the inven...

AI Technical Summary

Problems solved by technology

[0004] 1. Easily corroded;

[0005] 2. The strength changes greatly with temperature, so it is limited by the use temperature. The higher the use temperature, the higher the material and the higher the cost;

[0006] 3. The thermal conductivity is relatively large, and the arrangement of the anchor nails on the equipment wall is relatively dense, so the temperature of the outer wall of the equipment is relatively high;

[0007] 4. The coefficient of thermal expansion is much larger than that of castables. When used at high temperature, if no treatment is done in advance, there is a possibility that the castable lining will be cracked.

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