Low cement refractory castable mainly refers to the refractory castable with CaO content less than 2.5% in the refractory castable with calcium aluminate cement. In addition, the ultrafine powder with the same or similar chemical composition as the main material of refractory castable is used in the substrate of low cement castable to replace some or most calcium aluminate cement. Therefore, this kind of refractory castables belong to the refractory materials with the coexistence of hydration and condensation.
Low cement castables have a number of advantages in low cement refractory castable due to the use of ultrafine powder to replace a portion of calcium aluminate cement, which we will show you in a moment. We are a professional manufacturer of unshaped refractory, with transparent production process and high degree of automation of production equipment. We are committed to the production of high quality refractory products, and many customers to establish long-term friendly relations of cooperation, has been the customer’s consistent praise and trust.
1. The low CaO content in this series of refractory castables effectively reduces the formation of low eutectic phase in the material, thus improving the refractoriness, high temperature strength and slag resistance.
2. During construction, the mixing water consumption of low cement castable is only 1/3~1/2 of that of ordinary castable, so its porosity is low and its volume density is high.
3. After pouring and molding, the low cement refractory castable generates less cement compounds during curing, and there is not a lot of hydration bond failure during heating and baking, which leads to the decline of the medium temperature strength. On the contrary, the strength also increases gradually with the increase of heat treatment temperature.
4. Its force composition can be adjusted appropriately, can be prepared into the artesian castable and pump pouring castable.
The series of refractory castables are made of high quality refractory aggregate and powder as refractory raw materials by adding binder and additives after mixing. It is widely used in heating furnace, all kinds of heat treatment furnace, electric furnace cover, shaft kiln, rotary kiln, blast furnace iron outlet, ladle, ladle and so on lining; The artesional low cement castable is suitable for lining of high temperature refractory members with metal bolting parts, such as lining of water cooling pipe of heating furnace, lining of integral spray gun for jet metallurgy, impregnated pipe lining of RH and DH vacuum degator, ladle gas supply element and high temperature wear-resistant lining of petrochemical catalytic cracking reactor. It is mainly used in the construction of complex parts, which can greatly improve the overall use effect.
