Trolley furnace is the national standard energy-saving type of periodic operation furnace, ultra-energy-saving structure, the use of composite fiber insulation, ultra-lightweight high-strength microbead vacuum ball energy-saving brick, the exclusive production of wire drop up inclined 20° wire shelf brick, furnace mouth to prevent workpiece impact brick, automatic sealing trolley and furnace door, integrated rail, without basic installation, can be used on the horizontal ground. Mainly used for high chromium, high manganese steel castings, gray cast iron, ductile cast iron, roll, steel ball, crusher hammer, wear-resistant lining plate quenching, annealing, aging and all kinds of mechanical parts heat treatment.