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在苏联生产的铬矿石精矿总量中,95%是来自顿河矿山采选联合企业的选矿厂加工肯皮尔赛矿床的矿石,而该矿床在储量和物质成分上都是独一无二的。众所周知,精矿的质量是根据其中有用组分(Cr_2O_3)的品位评价的,而选矿厂的总体工作效益则是根据精矿中有用组分的回收率评价的。在1983、1984和1985年,精矿中Cr_2O_3的回收率分别为78.6%、76.6%和80.1%。可见,如果根据这三年的实际结果判断,随原矿运到选矿厂的有用组分总量的20～23%都随尾矿被扔进废石场,无可挽回地损失掉。把有用组分的损失减少百分之一,就意味着顿河矿山采选联合企业每年可在原矿数量不变的情况
Ninety-five percent of the total chromium ore concentrate produced in the USSR is derived from processing ore at the Kennels deposit at the beneficiation plant at the Don Mine Mining and Dressing Complex, which is unique in reserves and composition. It is well known that the quality of a concentrate is evaluated on the basis of the grade of the useful component (Cr 2 O 3), while the overall benefit of the concentrator is based on the recovery of the useful components in the concentrate. In 1983, 1984 and 1985, the recoveries of Cr 2 O 3 in the concentrate were 78.6%, 76.6% and 80.1%, respectively. Obviously, judging from the actual results of these three years, 20-23% of the total amount of the useful components shipped to the concentrator with the ore is irrevocably lost as the tailings is thrown into the waste rock field. By reducing the loss of useful components by 1%, it means that the Don River Mining and Dressing Consortium can keep the same amount of ore every year