... materials smelting capacity Steel, stainless steel, brass, copper, gold, silver aluminum and aluminum alloy ZXK-Z-1515KW3KG10KG3KGZXK-Z-2525KW5KG20KG5KGZXK-Z-3535KW10KG30KG10KGZXK-Z-4545KW18KG50KG18KGZXK ... small medium frequency furnace precious metals such as gold, platinum, silver and other metal smelting, university laboratories, research institutes, jewelry processing ...