Refractory brick manufacturer's choice often determines the quality of refractory bricks, refractory bricks is a test of the strength of the manufacturer, choose a good manufacturer can often determine the use of high-temperature kiln equipment time, if there is a problem can also be provided in a timely manner related to the after-sales service, a lot of people think that the strength of a little bit of the manufacturer's price is certainly expensive, in fact, this is not necessarily, the large manufacturers of higher shipments of refractory bricks, refractory bricks instead of the price so come down, so it's necessary to choose a formal, product quality assurance of the refractory brick manufacturer.
Common refractory bricks
Clay bricks
Due to the low load softening temperature of clay bricks, contraction at high temperature, thermal conductivity is 15%~20% smaller than silicon bricks, and the mechanical strength is also poorer than that of silicon bricks, so clay bricks can only be used in the secondary parts of the coke oven, such as the sealing wall of the heat storage room. The price of clay refractory bricks is relatively cheaper.
High-alumina bricks
High alumina brick alumina content is higher, a high alumina brick alumina content of more than 75%, close to the neutral refractory materials, so high alumina brick refractoriness, high load softening temperature, slag resistance performance is good, the cost is also relatively expensive, mainly used for masonry blast furnace, hot blast furnace, electric furnace roof, blast furnace, reflector furnace, rotary kiln lining. In addition, high alumina bricks are also widely used as flat furnace heat storage type lattice bricks.
Insulation Brick
Insulation bricks, also called thermal insulation bricks, with clay as the main raw material, alumina content is usually 30% ~ 48%, low bulk density, insulation bricks can be used as a hot surface refractory materials or other refractory materials to support the thermal insulation layer.
Mullite Brick
Corundum mullite bricks are made of high purity corundum and mullite, molded under high pressure and fired at high temperature. The products are characterized by high temperature resistance, corrosion resistance, good thermal stability and small rate of change of line.
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