Anti-corrosion flint clay refractory brick and preparation method thereof

Abstract

The invention provides a corrosion-resistant burnt gem refractory brick, comprising a refractory brick base and a high-temperature resistant coating sprayed on the surface of the refractory brick base; wherein, the raw materials of the refractory brick base include: 25% to 31% of burnt gemstone large particles %, hollow glass microspheres 8%~17%, superfine metakaolin powder 20%~25%, titanium dioxide 3%~8%, expanded graphite 0.5%~1.5%, fly ash 5%~10%, diatoms 5% to 10% of soil, 3% to 6% of aluminum stearate, and the balance is pulp water; the raw materials of the high temperature resistant coating include: polysiloxane 40% to 45%, potassium hexatitanate whisker 1 %~3%, Mo powder 3%~10%, and the balance is ethanol. The invention also provides a method for preparing the corrosion-resistant coke gem refractory brick. The method has simple steps and is easy for automatic production.

Description

Technical field [0001] The invention belongs to the technical field of refractory materials, and specifically relates to a corrosion-resistant scorched gem refractory brick and a preparation method thereof. Background technique [0002] Refractory materials are widely used in high-temperature industries such as metallurgy, petrochemical, and glass due to their good corrosion resistance to high-temperature media and their thermal insulation properties. With the increasing emphasis on energy saving and consumption reduction in our country, light refractory materials with good thermal insulation effect have received more research and development. Unshaped refractory materials have received special attention due to their convenient construction, low production cost, and good overall structure of the lining. Among them, refractory castables are the most widely used. [0003] The commonly used refractory castable is mainly Al 2 O 3 -SiO 2 However, when such refractory materials are used...

AI Technical Summary

Problems solved by technology

[0003] The commonly used refractory castables are mainly Al 2 o 3 -SiO 2 However, when this type of refractory material is used in petrochemical and other industries, due to the influence of the reducing atmosphere environment, the damage of the refractory material will be aggravated, thereby reducing the service life of the material

In addition, due to the large size of pores in traditional refractory aggregates, the pore diameters are mostly at the millimeter level, so when the material is used in a high temperature environment, due to the intensification of radiation heat transfer and convective heat transfer through the gas in the pores, the refractory material will The thermal conductivity of the refractory material increases, which in turn reduces the heat insulation effect of the refractory material, increases the loss of heat energy, and leads to an increase in energy costs.

Images