I t is suitable for melting and thermal insulation of non-ferrous metals such as aluminum,magnesium and lead. The brick and cotton structure is adopted and the heating elements are insalled on the bricks on the sides of the furnace, and the furnace crucibles are arranged in the furnace. A hole cover is arranged at the lower part of the front end of the furnace for the crucible to oxidize cracks and forn droplets, so that the solution in the crucible can bow out of the furnace through the hole so that the hole so that the chamber furnace can not be damaged .