Lightweight heat insulating firebrick is a kind of refractory and heat-insulating product with light weight, tiny pores evenly distributed inside, high porosity, and good heat-insulating effect. Lightweight thermal insulation firebricks can effectively reduce the floor load, and the sound insulation effect is also better.
Lightweight heat insulating firebricks
Lightweight insulating firebricks are usually divided into three types: ordinary, refractory, and high temperature:
(1) Ordinary thermal insulation bricks, the operating temperature is below 1000 ℃, mainly including diatomite bricks, expanded razor bricks, expanded perlite bricks, etc., which are mostly used as thermal insulation layers for thermal equipment.
(2) Refractory and heat-insulating bricks, the operating temperature is between 1000 and 1500 °C, mainly including lightweight clay bricks, lightweight silica bricks, and lightweight high-alumina bricks.
(3) High-temperature heat-insulating bricks, the operating temperature is above 1500℃, and can be directly used as the lining of high-temperature kilns, mainly including light corundum bricks, alumina hollow ball products and zirconia hollow ball products.
High-strength lightweight heat-insulating refractory products are made of tabular corundum and mullite as aggregates, sillimanite composite as matrix, special additives and a small amount of rare earth oxides are added for mixing, and they are formed by high pressure and fired at high temperature.
Introduction to the characteristics of lightweight heat-insulating firebricks: 1. Low thermal conductivity, low heat capacity, and low impurity content; 2. High strength, good thermal shock resistance, corrosion resistance to acid and alkali atmospheres; 3. High dimensional accuracy.
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