Production method of acid-resistant, alkali-resistant and high-temperature-resistant foamed ceramic heat-insulation lining used in chimney

Abstract

The invention discloses a production method of an acid-resistant, alkali-resistant and high-temperature-resistant foamed ceramic heat-insulation lining used in a chimney. The heat-insulation lining is prepared from following raw materials, according to certain weight part ratios, clay, bentonite, calcite, dolomite, sandstone, talcum, silicon carbide and a peptizing agent. The production method includes following steps: 1) crushing the raw materials into granular materials being less than 10 mm; 2) stirring and homogenizing the granular materials in a ball mill and wet-milling the granular materials into slurry material in 250 meshes; 3) feeding the slurry material into a drying column, increasing the temperature to 320 DEG C to dry and pelletize the slurry material to obtain pellets; 4) placing the pellets in a kiln car and sintering the pellets in a tunnel kiln at 1200-1250 DEG C; and 5) decreasing the temperature to normal temperature and moving the sintered product after the pellets remains at the sintering temperature zone for 3-10 h, and cutting the sintered product into building blocks according to requirement. The close-pore ceramic heat-insulation material, which is formed through high-temperature roasting to the raw materials blended according to certain weight part ratios and is high in porosity, has the characters of being fire-proofing and flame-retarding, being less in deformation coefficient, is anti-aging, is stable in performance and is toxic-free and environment-friendly. The material is good in compatibility with a wall base layer and a plaster layer, is good in safety and stability, has the same service life of a building, and provides guarantee to heat insulation and high temperature resistance of various chimney buildings.

Description

technical field [0001] The invention relates to an inorganic ceramic thermal insulation material, in particular to a production method of an acid-resistant, alkali-resistant, high-temperature-resistant foamed ceramic thermal insulation lining for a chimney. Background technique [0002] A chimney is a common building in an industrial plant, and the chimney lining is the "digestive system" of the entire chimney, which often needs to withstand high temperature, acid, alkali, etc. The lining poses a fatal threat and greatly reduces its service life. How to develop a thermal insulation lining with acid and alkali resistance, high temperature resistance and low cost is also a big problem for the refractory industry. Contents of the invention [0003] The purpose of the present invention is to provide a method for producing an acid-resistant, alkali-resistant and high-temperature resistant foamed ceramic thermal insulation lining for chimneys. The lining produced by this method ...

AI Technical Summary

Problems solved by technology

[0002] A chimney is a common building in an industrial plant, and the chimney lining is the "digestive system" of the entire chimney, which often needs to withstand high temperature, acid, alkali, etc. The lining poses a fatal threat and greatly reduces its service life. How to develop a thermal insulation lining with acid and alkali resistance, high temperature resistance and low cost is also a big problem for the refractory industry.