In addition to the performance of thermal insulation bricks and refractory bricks are completely different in the performance of the two, their appearance is also different. The appearance of the insulation brick is relatively loose, belonging to the loose body. The refractory brick is relatively compact, belongs to the high-strength press out of the refractory brick, the strength is relatively large.

Insulation bricks are generally lightweight insulation materials, the density is generally 0.8-1.0g/cm3 and the density of refractory bricks is basically above 2.0g/cm3. In summary, the refractory brick has high mechanical strength, long service cycle, good chemical stability, no chemical reaction with the material and good high temperature resistance, and the highest heat resistance temperature can reach 1900℃. Especially suitable for chemical fertilizer plant in high and low temperature conversion furnace, conversion furnace, hydroconverter, desulfurization tank and methanation furnace, to disperse gas and liquid, and support, cover and protect the catalyst role. It can also be used in hot blast furnaces and heating conversion equipment in the steel industry. Firebrick has the advantages of high density, high strength, wear resistance, good corrosion resistance, small thermal expansion coefficient, high grinding efficiency, low noise, long service life, no dirt material and so on. It is a high quality grinding medium suitable for various grinding machines. The difference between refractory bricks and thermal insulation bricks is very big, and their use environment, scope and function are different. Different bit

Different materials will be used, in the purchase of materials, we have to decide which refractory material is suitable for their own use according to their actual situation. The AI203 content of clay heat-insulating firebrick is generally more than 40%, and the Fe203 content is less than 2.0~2.5%. The clinker is 65~85% and the combined clay is 35~15%. Pulverized bonded clay and fine clinker are mixed, and then prepared into semi-dry mud with granular clinker, formed under high pressure, and fired at about 1400', with better performance. Clay brick at high temperature

It is weakly acidic under. Refractory materials with high porosity, low volume density and low thermal conductivity, thermal insulation refractory materials are also called light refractory materials, which include thermal insulation refractory products, refractory fiber and refractory fiber products. Thermal insulation refractories are characterized by high porosity, generally 40%-85%; Low bulk density less than 1.5g/cm3; The thermal conductivity is low, generally less than 1.0W(m.K). It acts as a thermal insulation material for industrial kilns, which can reduce the heat loss of furnaces, save energy, and reduce the quality of thermal equipment. Thermal insulation refractories have poor mechanical strength, wear resistance and slag erosion resistance, and are not suitable for the bearing structure of the kiln and direct contact with slag, charge, molten metal and other parts.