Lightweight heat insulation foaming stone heat preservation plate and preparation method thereof

Abstract

The invention discloses a lightweight heat insulation foaming stone heat preservation plate and a preparation method thereof. The heat preservation plate is prepared from the following ingredients inpercentage by weight: 90 to 97 percent of feldspar, 1 to 2 percent of water glass, 2 to 8 percent of mineralizing agents and 0.4 to 2 percent of foaming agents. The preparation method of the heat preservation plate is characterized in that firstly, materials are mixed and are subjected to fine grinding; then, a silicon carbide material is used for manufacturing box body saggar; a clay anti-cohesion layer is coated at the inner surface of the saggar; the mixed materials are put into the saggar and are subjected to foaming sintering in a tunnel kiln; the sintering foaming temperature is 1200 to1250 DEG C; after slow cooling, large-block-shaped foaming stone is obtained; then, the stone is cut and processed into various block shapes. The volume density is smaller than that of a lightweight heat preservation brick; the mechanical strength is higher than that of the lightweight heat preservation brick; the heat insulation and heat preservation performance is superior to that of the lightweight heat preservation brick; the use temperature is higher than that of foam glass and foam ceramics; the heat preservation plate can be used for outer layer heat preservation of high-temperature equipment such as high-temperature kilns; the heat insulation and heat preservation effects can be obviously improved.

Description

technical field [0001] The invention relates to a thermal insulation material and a preparation method thereof, in particular to a lightweight thermal insulation foam stone thermal insulation board and a preparation method thereof. Background technique [0002] High-temperature kiln is a device made of refractory materials for calcining materials or firing products; whether its structure is reasonable and the selection is correct is directly related to the quality of products, the level of output and energy consumption, etc. key equipment in. At present, the insulation of high-temperature equipment (kiln) mainly uses lightweight insulation bricks. The inner layer has a high temperature and uses lightweight high-alumina bricks, and the outer layer uses lightweight clay bricks. Because these insulation bricks have air permeability, their insulation effect is affected; The outer layer of some kilns is sealed with iron plates, the temperature of the outer iron plates is still h...

AI Technical Summary

Problems solved by technology

At present, the insulation of high-temperature equipment (kiln) mainly uses lightweight insulation bricks. The inner layer has a high temperature and uses lightweight high-alumina bricks, and the outer layer uses lightweight clay bricks. Because these insulation bricks have air permeability, their insulation effect is affected; The outer layer of some kilns is sealed with iron plates, the temperature of the outer iron plates is still high, and the heat preservation effect is poor