... heating 2:High efficiency 3:Can melt gold,silver,copper,etc. other applications:harden,weld,forge,anneal ... metal High Frequency Electric Silver-smelting FurnaceModel WH-VI-50 about melting .Main ... .2,full range, high frequency, high frequency series, power (KW) have 16,36,50,60,80 ... ,120 series.3, small size, light weight, simple installation, ...