Silver processing | Britannica
S.K. Haldar, in Platinum-Nickel-Chromium Deposits, 2017. 11.5.3.2 Smelting. Smelting is necessary to maximize the separation of the gangue (oxide and silicate) minerals from the sulfide minerals associated with the noble metals. Flotation concentrates undergo smelting and converting in a furnace at a temperature exceeding 1300°C to produce a silicate melt (slag) and an immiscible sulfide melt ...