... ; IGBT Intermediate Frequency Induction Heating Machine (5-20Khz) Main features 1.Adopt IGBT technology, with all-round ... . Only 1 square meter.4.24 hours continuous smelt ability.5.Saving more than 20% ... such as stainless steel, copper, aluminum and industrial silicon, the smelting speed is very fast, ... using the high temperature, which is applicable to the smelting of iron, steel, copper, aluminum, ...