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在廿世纪六十年代期间,由于低品位矿体的大量开采,磨机及磨矿车间的扩大,要求浮选设备也随之扩大。为了满足这种要求,维姆科公司试制了一种300立方呎的浮选机,其容积为标准型№66浮选机的5倍。№66浮选机选别斑岩铜矿的平均处理量每槽为100吨/日,№120浮选机(300立方呎)每槽将能处理500吨/日,并且选别效果及单位动力消耗均相等。№120浮选机在工业上的应用并且导致了更大型的№144浮选机的试制。
During the 1960s, due to the extensive exploitation of low-grade ore bodies, the expansion of mills and grinding plants required the expansion of flotation equipment. To meet this requirement, the company developed a 300-cubic-foot flotation machine with five times the capacity of a standard №66 flotation machine. № 66 flotation machine sorting Porphyry copper average handling capacity of 100 t / t slot, № 120 flotation machine (300 cubic feet) will be able to handle each tank of 500 tons / day, and the sorting results and the unit power Consumption are equal. № 120 flotation machine in the industrial application and led to a larger trial № 144 flotation machine.