2024-04-09 09:19:33
Heavy refractory bricks belong to high-temperature and wear-resistant refractory materials, which are used at high temperatures. They are mostly used as working or basic layer materials in industrial kilns to prevent damage to the kiln body caused by high-temperature solutions and protect the insulation layer material. Lightweight refractory bricks belong to thermal insulation bricks, with low usage temperature. They are mostly used as insulation layer materials in kilns or thermal equipment, reducing heat loss and saving energy consumption.
(1) The production process is different. Heavy duty high alumina bricks are mainly made of high alumina alumina clinker as the main raw material, soft clay and waste pulp as binders, and are formed by high-pressure molding, drying, and high-temperature firing. Lightweight high alumina bricks are made by mixing high alumina bauxite clinker with clay binder and foaming agent, and firing them at high temperatures. They all belong to sintered refractory bricks.
(2) Different volumetric densities. The volume density of heavy aluminum bricks is 2.3-2.65g/cm3, with a dense volume density and low porosity, less than 23%; The volume density of lightweight high alumina bricks is between 0.6-1.5g/cm3, with low volume density and high porosity.
(3) The fire resistance temperature is different. The refractory temperature of heavy aluminum bricks is around 1580-1790 degrees, and they have good high-temperature resistance. The usage temperature of lightweight high alumina bricks is around 1350-1500 degrees.
(4) Different parts of use. Heavy aluminum bricks with high refractory temperature can be used in areas in contact with slag or solution, with low porosity and strong resistance to penetration. The use temperature of lightweight high alumina bricks is low, the porosity is high, and they cannot come into contact with flames or slag. The slag is easy to penetrate the interior of the brick and cause damage to the brick. They are mostly used as insulation layer materials.
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