Several species of castable

   Castable consists of aggregate, binder and admixtures. Depending on the binders can be divided into Portland cement castable, aluminate cement castable, castable sodium silicate, phosphate castable refractory concrete and clay combined with magnesia refractory castable.

   Portland cement castable concrete binder weight accounted for 7% -20%. Portland cement castable cementitious material used, the need to eliminate the role of calcium oxide. When the addition of 50% -100% by weight of cement of clinker fine clay powder as admixture, it combines with calcium oxide and aluminum to form a stable calcium silicate minerals. This refractory concrete stick low cost, available at the following 1000 ℃, temperature fluctuation is not, no acid erosion in places such as basic equipment, flues, chimneys, etc.

Aluminate cement castable based on alumina as binder to bauxite clinker as aggregate and blending material made ​​of hydraulic concrete. The main mineral bauxite is calcium aluminate cement hydration fast. Therefore, this concrete hardening, high early strength.

   Water glass castable is a water glass binder and add the appropriate amount of sodium silicon fluoride gas as hard concrete coagulant made​​. Silicone silicate hydrolysis of the aggregate, admixtures together. This concrete strength is relatively high, but the low refractoriness and load softening point, applies to the following 1000 ℃ require a higher strength, wear resistance, corrosion can antacid site, but not for regular water or water vapor effect place.

   

Phosphate castable based on industrial phosphoric acid binder, sometimes plus the amount of alumina cement as a coagulant and made of hot hard concrete. This is characteristic of concrete cured at room temperature without consolidation, in order to solidify and a certain intensity, to add coagulant. Was heated to 500 ℃ hardened consolidation, and the strength will be improved, but near 800 ℃, low temperature strength of its shortcomings, and strength after the temperature rise. This refractory concrete has excellent fire resistance, abrasion resistance, slag resistance and thermal shock resistance, long-term use under the conditions of 1400-1600 ℃.

   The casting material can be poured directly on the thermal equipment templates, add anchors inside after tamping after a certain curing period can be. Can also be made of prefabricated blocks, such as the vault, ceiling, wall oven, lid, door, etc., than the brick or directly casted, both during construction and replacement much more convenient.