In pit crushing and conveying in surface mines
Dec 30, 2019· 13. Duval Corporation began installation of the first movable in-pit crushing and conveying systems in 1981 at its Sierrita Copper and Molybdenum Minenear Tucson, Arizona, and the operation of the system began in 1982 December. Operation of another similar system also began in 1982 at Sishen's North Iron Ore Mine in South Africa. Since then ...
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