Light insulation brick is divided into different materials, different body density. At present, the proportion of clay light brick will be more, if it is too high temperature insulation layer, must use suitable for different temperature insulation brick. If the temperature is 1000℃, choose clay insulation brick. If the temperature is 1300℃, high aluminum light insulation brick should be selected, if the temperature is above 1350℃ insulation layer, mullite insulation brick should be selected. There are some light kiln, lining the working layer is also selected light brick to reduce the weight of the kiln body, that is to choose alumina hollow brick.
Whether clay, high alumina, mullite have different body density of 1.0, 1.2, 0.8, 0.6, the smaller the body density, the better the insulation effect. Alumina hollow ball insulation brick is 1.2, 1.0 body dense, but some of the furnace lining of special materials construction, or to choose a slightly higher strength insulation brick, because the body dense is too small, working layer of heavy brick will wear insulation brick in the process of use into pieces. The insulation effect is affected.
Of course, the body density is different, the price is different, the smaller the body density of the insulation brick price is higher. Because the size of the body density is not the same thermal conductivity. The smaller the body density of the thermal insulation brick, the lower the thermal conductivity, the better the thermal insulation effect, so as to save the fuel during the use of the kiln body, reduce the production cost.
And the smaller the body density, the lower the weight of the industrial kiln, the smaller the body density of the insulation brick, the higher the raw material price, the better the insulation effect, but the price will be higher, but the selection of light insulation layer in the process, but also consider the problem of strength, the smaller the body density of light insulation brick, the lower the strength, if the working layer of heavy brick body density, Or consider the body density of light brick, if the body density of low material insulation brick is too high, insulation effect is not good, it is necessary to choose high material insulation brick to do insulation layer, or heavy brick grinding insulation brick, insulation effect will be affected, and heavy brick with insulation layer broken, will move, the lining of the whole kiln will need to be replaced and repaired.
But if the working layer uses alumina hollow ball brick, you do not need to consider the problem of too small body density, alumina hollow ball brick can play the role of insulation, but also can directly contact the flame. Reduce the trouble of insulation layer and heavy layer, can directly play the dual role of insulation and use.
Therefore, the body density of light insulation brick is different, the insulation effect is different, and the selection is the most reasonable according to the temperature of the kiln.