... type of heating technique is applicable to The gold melting and packing industry (such as sealing ... . to precious metal in an instant , then smelting .refining ,casting and other processes:2,For the ... precious metals: platinum, palladium, rhodium, gold, silver, copper. Steel, gold powder, sands, tin, tin slag ash ... melting time:2-20 minutes:4,The maximum furnace temperature up to 1500-2000 degrees.5, ...