Calcium aluminate cement-based fireproof pouring material
Calcium aluminate cement (abbreviated as CAC) is a kind of inorganic cementitious material with high aluminate content, mainly composed of three calcium aluminate compounds: CA (CaO · Al2O3), C3A (3CaO · Al2O3) and C4A3 (4CaO · Al2O3). Its full name is calcium-aluminate cement. Calcium aluminate cement and Portland cement are two kinds of widely used cementitious materials. Calcium aluminate cement has the advantages of short setting time, low initial heat of hydration, and excellent corrosion resistance, so it is widely used in special fields such as construction, electric welding rod binders and refractory castables. And it is the main binders for refractory castable mixes and other refractory products.
Because of its excellent corrosion resistance, calcium aluminate cement-based fireproof pouring material has become one of the important protection materials used in metallurgical steel, chemical industry, power plants, electric heating furnaces and other industries. The fireproof pouring material made of calcium aluminate cement can effectively improve the mechanical properties, corrosion resistance, spalling resistance, erosion resistance and high temperature performance, and has good construction performance, so it is widely used.
The main ingredients contained in the fireproof pouring material of calcium aluminate cement are aluminate oxide, calcium oxide, aluminum oxide, and also polyethylene and other additives. These ingredients will interact with each other in the process of production and construction and produce necessary chemical reactions. Aluminate oxide and calcium oxide can both hydrate in water and turn into cementitious material with hydration hardening effect. Aluminum oxide has good refractoriness and can better maintain the body shape of products in a high temperature environment and prevent thermal cracking. The polyethylene part can reduce the density of refractory castable and better maintain its workability.
Calcium aluminate cement-based fireproof pouring material has many advantages such as good thermal shock resistance and strong corrosion resistance. Its setting time can both effectively prevent running and is featured with better refractoriness and corrosion resistance . In addition, its low coefficient of thermal expansion and air permeability allows it to endure aggressive cooling and heating, long aging resistance, and the deterioration caused by chemical infiltration is not easy to occur. These characteristics make calcium aluminate cement-based fireproof pouring material widely used in the current market and also made it the most popular choice of refractories.
In general, calcium aluminate cement-based fireproof pouring material is one of the most popular refractory products on the market. It has excellent thermal shock resistance, strong corrosion resistance, can resist aggressive cooling and heating, and can provide good protection in the harsh environment. Therefore, it is very suitable for use in metallurgical furnaces, chemical plants, and power plants.
