This passage mainly talk about the difference of refractory fire brick and refractory castable.
Lightweight refractory castables in Castable Refractories Supplier are hydraulic castables, suitable for various furnace lining insulation layers, float glass furnace flue sealing castables, with low thermal conductivity, good thermal insulation performance, low linear shrinkage, It has the characteristics of good casting integrity and good drying strength. Heavy refractory castables in Castable Refractories Supplier are mainly used as linings and sealing materials for thermal equipment in industrial kilns.
Clay, high alumina and inorganic refractory castables are classified according to the performance of the binder. They have the characteristics of hydraulic and high temperature respectively. The refractory castables in Castable Refractories Supplier have high acid resistance, corrosion resistance, thermal shock resistance, wear resistance, Anti-stripping, suitable for small and medium blast furnace hearth in cement kiln, power frequency induction furnace melting tank, soaking furnace desulfurization hood, blast furnace air duct rotary kiln and various flue, acid, tank and other parts.
Scope of application: Industrial cellar furnace wall lining or high temperature I industrial cellar furnace backing insulation layer, electric heating furnace door, double inspection holes, non-ferrous burning bricks, ferrous metal melting grooves, grooves.
Refractory castable: It is a mixture composed of granular materials and cementing materials of different particles. When used, a certain proportion of water is mixed, formed and hardened. The shaped material is a non-sintering product; refractory bricks are made of different The mud of the material is formed, dried and fired at high temperature, and it is a sintered product. Compared with refractory fire bricks, refractory concrete simplifies the manufacturing process, reduces the production cost, and makes the furnace equipment have good integrity and performance. Compared with refractory concrete and refractory bricks, they have the following advantages:
① The refractoriness is close to or slightly lower than that of homogeneous refractory bricks;
②The softening temperature under load is much lower than that of homogeneous refractory fire bricks;
③ The coefficient of linear expansion is small, which offsets the thermal expansion of the aggregate due to the sintering shrinkage of the cemented material during thermal processing;
④High strength at room temperature;
⑤ Good cracking resistance (thermal shock resistance), better than homogeneous refractory fire bricks;
⑥ The apparent porosity is slightly lower than that of refractory bricks, but there are many closed pores, so the density is not as good as that of refractory bricks;
⑦ The shrinkage of the re-fired line is generally larger than that of the refractory brick.
