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由于氧化铝生产工艺对供矿品位波动范围要求极严,铝土矿的配矿和混矿后的品位计算一直为有关同志所关注,并先后出现和归结出
Due to the strict requirements on the fluctuation range of ore supply for the alumina production process, the calculation of the grade of bauxite with ore and mixed ore has been paid attention to by relevant comrades and has appeared and summed up