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Lead And Inc Ore Crushing And Grinding Pdf Jan

12.18 Leadbearing Ore Crushing And Grinding 12.18.1 General1 Leadbearing ore is mined from underground or open pit mines. After extraction the ore is processed by crushing screening and milling. Domestic lead mine production for 1991 totaled 480000 megagrams Mg 530000 tons of lead in ore concentrates a decrease of some 15000 Mg

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