Special aluminum carbon refractories

Special refractory aluminum carbon and carbon refers to aluminum as raw materials, in most cases, added to other materials, such as SiC, metals Si, Al, etc., bonded together with an organic resin or pitch carbon composite binder special refractories. Broadly speaking, the alumina and carbon as main components are called refractory carbonaceous refractory aluminum. Aluminum carbon refractories their different production processes can be divided into two categories:

do not burn carbon refractories and firing aluminum aluminum carbon refractories.

Aluminum does not burn carbon refractories are bound carbon refractories, because of its antioxidant activity was significantly better than Bricks and excellent anti-corrosion performance system Na2O slag, so widely in the blast furnace, ladle hot metal pretreatment equipment, etc. applications. Aluminum carbon refractories are fired combined-type ceramic refractories, because of its high strength, good resistance to corrosion and thermal shock resistance, and thus a large number of suitable casting sliding gate system with skateboard brick and casting Big Three, namely long nozzle, submerged nozzle and overall stopper rods.

Alumina has a high resistance to acid, basic slag, metal and glass capacity effect solution. It is a high temperature in an oxidizing atmosphere or under a reducing atmosphere used can be a good effect. Carbon and graphite materials have a particularly high thermal conductivity and low coefficient of linear expansion, while a solution having a high temperature with no residue and wettability. So aluminum carbon brick has the following properties.

(1)    aluminum carbon refractories have excellent slag resistance and thermal shock resistance. Compared with magnesium carbon refractories, aluminum carbon refractories have better resistance to alkali TiO2 slag erosion and corrosion capabilities.

(2)    For aluminum baking carbon bricks, because silicon and carbon additives at a high temperature to form silicon carbide, so as to have a double bonding system, i.e., a combination of carbon and ceramic bond, and thus calcined alumina carbon refractory with high mechanical performance, not only act as a conventional continuous casting refractories, and is a functional configuration of the material.