... smelting furnace 1.For smelting iron,steel,copper,gold, silver,alu 2.Energy saving 3.Best pric Medium frequency ... mainly used for smelting steel, iron, copper, stainless steel, aluminum, gold, silver, precious stones, metallic and non-metal;The vacuum melting ... the environment of protecting atmosphere or vacuum (such as cobalt, tungsten, titanium, etc) The crucible in the smelting furnace with best ...