The JN series high-strength wear-resistant castables are made of various high-strength wear-resistant aggregates and powders such as fused alumina, silicon carbide, mullite, etc., as well as bonding additives. It has the characteristics of minimum wear loss, high strength, good integrity, convenient and simple construction, etc. It is suitable for high-temperature wear-resistant linings in coal, thermal power, chemical, cement and other industries. At present, it is used in many circulating fluidized bed boilers in China and has achieved good results.