How & Where to Sell Ore Concentrates and BullionHow & Where to Sell Ore Concentrates and Bullion View Larger Image Table of Contents Payments for Metals gave examples of open schedules covering gold and silver ores at western United States lead smelters Table 62 gives similar schedules at copper smelters decidedly to the advantage of the shipper to reduce gold and silver to -silver concentrates ore uses in hartford united states-,United States Patent 7892505 Royal SilverUnited States Patent 7 892 505 McConnell February 22 2011 Hydrometallurgical process for the treatment of metal-bearing sulfide mineral concentrates Abstract A hydrometallurgical process for the treatment of complex silver-bearing sulfide ores and concentrates that…… Get More