... value metals such as lead, zinc, copper, gold, silver, bismuth, indium, tellurium etc. We can deal with ... metal products1.1 The raw material source of gold, silver, bismuth, tellurium etc. rare metals production: Pb ... staff training, includes copper powder, nickel powder, zinc powder, 663 alloy powder, lead powder, ferronickel powder, powdered diamond catalyst, silver powder. 9 Environmental protection ...