90kw IGBT medium frequency machine is built for melting 40kg steel or 120kg copper and precious metal like gold silver etc. LSZ-90 furnace adopts IGBT inverter and keeps electrical consumption well below that of SCR melting systems. LSZ series furnaces are mainly used for melting steel, stainless steel, copper, aluminum, gold and silver. Key Features Industrial duty rating: Designed for continuous shift melting with heavy duty electrical and cooling components. 120kg copper