Properties of clay refractory

(1) Fire resistance. The low degree of fire resistance of clay refractory products is lower, and the increase of three aluminum oxide content in clay brick is improved… Generally 1580 for ~1750;

(2) Load softening temperature. Fireclay refractory load softening temperature is low; refractoriness under load was usually less than 1300 degrees.

(3) Thermal shock stability. Fireclay refractory thermal shock stability is better, the main reason is mullite crystals are surrounded by glass phase, mullite itself smaller coefficient of expansion, when heated does not produce stress concentration, so the stability of thermal shock resistance is good.

The main factors that affect the thermal shock stability of clay refractory are the physical properties of raw materials and the structure of clay brick… Therefore, the thermal stability of the clay brick can be improved by increasing the proportion of clinker and adopting reasonable brick making process…

(4) Slag resistance. The main chemical constituents of the clay refractory are silica and threealumina, and the former is more than the latter, and the clay brick is obviously weak acidity… Therefore, the ability of acid slag erosion ability than the strong anti alkaline slag.

Increase the density of two aluminum oxide and clay brick, increase the content of clinker, decrease porosity and decrease the impurity content of clay brick, and increase slag resistance of clay brick…

(5) The change of heavy firing line. For the clay refractory, the shrinkage of the residual shrinkage is no more than l%. Increasing tile clinker proportion, an appropriate increase in firing temperature and reasonable insulation, can make clay brick volume stability improvement, that reheating linear change decreases.