High strength and low conductivity castables have the characteristics of small bulk density and low thermal conductivity, which can reduce the weight of the equipment, good moisturizing performance, uniform furnace temperature, high energy and fire resistance, good overall performance, good peeling resistance and long service life. Various shapes or integral charges can be repaired at will.
Lightweight aggregates, as the main component of lightweight castables, have a crucial impact on the performance of castables. Because of the differences in the methods for measuring the bulk density and compressive strength of lightweight aggregates, the raw materials should not only be lightly tested. The index of the mass aggregate, and the index of the castable produced by the aggregate should be further tested, which is necessary for judging the quality of the raw material.
Moreover, the construction of high strength and low conductivity castables is simple. High strength and low conductivity castables should appropriately increase the critical grain size of the aggregate to enhance the compressive strength of the castable. However, if the critical particle size is too large, it will adversely affect the construction performance of the material.
High strength and low conductivity castables are widely used in industrial furnaces and thermal equipment in metallurgy, machinery, electric power, chemical, petroleum and other industries, and will save more than 20% energy than ordinary lightweight castables.
However, if used in petrochemical kiln, it requires lower body density and stricter. Therefore, the materials of other industrial furnaces are higher, and the price will be higher.
