Adopting a fiber structure, it can save up to 60% electricity. Adopting a composite high aluminum porcelain nail group, the trolley anti-collision sealing brick, automatic sealing trolley and furnace door, integrated rail connection, no need for foundation installation, can be used on a horizontal ground. Mainly used for quenching, annealing, aging, and heat treatment of various mechanical parts such as high chromium, high manganese steel castings, ductile iron, rolling rolls, steel balls, 45 steel, stainless steel, etc.