In the field of extractive metallurgy, mineral processing, also known as ore dressing, is the . For instance, stamp mills were used in Samarkand as early as 973. .. now manufactured by Gravity Mining Ltd, England. ), Salter Iron smelting · Lead smelting · Zinc smelting · Flash smelting · ISASMELT.
Lead and zinc ores are usually found together with gold and silver. . essentially a co product of zinc mining or a byproduct of copper and/or gold and silver . Beneficiation, which usually occurs at the mine, consists of crushing, grinding, and . ore has been concentrated at a mill near the mine, the lead concentrates are.