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Copper Mining Equipment Used In The 20th Century

The four major steps in the production of marketable copper are mining, concentrating, smelting, and refining.In a few instances, however, leaching takes the place of concentrating, smelting, and refining.At present, although considerable leaching and direct-smelting ores are produced, the bulk of the copper ore mined is concentrated.The milling of copper ores as practiced in the larger.

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