Combination reinforcing agent for aluminum silicon carbide casting material and preparation method thereof

Abstract

The invention discloses a combination reinforcing agent for an aluminum silicon carbide casting material. The combination reinforcing agent is prepared from the following raw materials according to the formula in percentage by weight: 18 to 30 percent of 71 pure calcium aluminate cement, 35 to 70 percent of 2-micrometer alumina micro powder, 1 to 6 percent of a water reducing agent, 8 to 25 percent of hydrated alumina, 0.6 to 2 percent of a magnesium-based flame retardant, 4 to 15 percent of 150-mesh metal silicon powder and 4 to 10 percent of 180-mesh metal aluminum powder. The invention alsoprovides a preparation method of the combination reinforcing agent for the aluminum silicon carbide casting material. Through the processing treatment on various materials, the combination reinforcing agent has the advantages that after the use, in a cement hydration process, the material in the combination agent realizes the eutectic reaction hydration to form sol and gel; the material has superhigh demolding intensity.

Description

technical field [0001] The invention relates to the technical field of reinforcing agents, in particular to a bonding reinforcing agent for aluminum silicon carbide castables. Background technique [0002] Castable, also known as refractory castable, is a granular and powdery material made of refractory material with a certain amount of binder. It has high fluidity and is an amorphous refractory material formed by casting. Compared with other unshaped refractory materials, refractory castables have better fluidity and convenient construction, so they have a wider range of applications. [0003] Low-cement castables refer to castables with a lower amount of cement. The cement content of refractory cement castables is generally 10% to 20%, the cement content of low cement castables is about 5%, and the cement content of ultra-low cement castables is reduced to 1% to 2%. The purpose of reducing the amount of cement is to improve the performance of the castable. It relies on ...

AI Technical Summary

Problems solved by technology

[0004] Normal ultra-low cement castables are castables with a cement content of less than 2%. The early demoulding strength of this type of castables is generally low, generally within 5Mpa, which brings certain hidden dangers of demoulding

However, increasing the amount of cement will increase the low-melt content due to the increase of CaO, which will affect the performance of the castable