... furnace 1.For smelting iron,steel,copper,gold, silver,alu 2.Energy saving 3.Best pric Medium frequency coreless ... used for smelting steel, iron, copper, stainless steel, aluminum, gold, silver, precious stones, metallic and non-metal;The vacuum melting furnaces ... cobalt, tungsten, titanium, etc) The crucible in the smelting furnace with best quality