occurence of silver

Silver occurs in ores of several metals. The froth process of extracting silver accounts for about 75 percent of silver recovered. Here the ore is ground to a powder, placed in large vats containing water suspensions of frothing agents and thoroughly y agitated by jets of air. Depending on the agent used, either the silver bearing ore or the gangue adhering to the bubbles of the froth is skimmed off and washed. The final refining is done using electrolysis.