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copper ore dressing in nigeria

ore dressingprocess forcopperrussia.DressingtheOreCornish Mining WHSCopper dressingrelied extensively on manual labour throughout the 18th and 19th centuries though mechanisation did play a partCoppercrushers ‘Cornish rolls’ were introduced in the early 19th century and low grade or otherwise difficultoreswere also stamped at some minesCopper orewas spalled in the

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