Low cement refractory castable

Product Description:

Among the refractory castables combined with calcium aluminate cement, the castable with a CaO content of less than 2.5%, that is, the castable with the calcium aluminate cement adding about 1/2 to 1/3 of the ordinary calcium aluminate cement castable, is called Low cement castable.In the matrix of low-cement castables, some or most of calcium aluminate cement is replaced by ultrafine powder with the same or similar chemical composition as the main material of the castable. Therefore, this type of castable belongs to the coexistence of hydration and cohesion. Of castables.Low-cement refractory castables are divided into three types: corundum, high alumina, and clay, and their use temperatures are 1700°C, 1400~1600°C, and 1350°C, respectively.

Product Features:

1. The low content of CaO in the castable can reduce the formation of eutectic phase in the material, thereby improving the refractoriness, high temperature strength and slag corrosion resistance;

2. The mixing water consumption of the castable during construction is only 1/3~1/2 of the ordinary castable, so the porosity is low and the bulk density is high;

3. After pouring and molding, there is less cement produced during curing, and there is no large amount of hydration bond damage during heating and baking, which causes the strength of the middle temperature to decrease, but as the heat treatment temperature increases, the strength gradually increases;

4. With proper adjustment of the strength and composition of the castable, it can be formulated into self-flowing castable and pump castable.

Product Usage:

Low cement castables are mainly used in metallurgy, electric power, nonferrous metals, petrochemical, building materials and other industries.Such as the bottom of the glass kiln, the front end of the front and rear kiln door cover cooler of the cement kiln, the front and rear kiln mouths, coal injection pipes, etc.; various heat treatment furnaces such as heating furnaces and soaking furnaces; medium frequency induction furnace lining, petrochemical catalysis High temperature wear-resistant lining of cracking reactor, lining of other industrial furnaces.The construction methods of on-site pouring, smearing and ramming can be adopted.

Physical and chemical indicators: