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某地岩溶堆积型铝土矿床的矿石质量指标及开采技术条件已在《岩溶堆积型铝土矿工业指标的初步探讨》一文中作了论述,本文不再赘述。按《铝土矿地质勘探规范》推荐的回归计算方程求出的边界品位是2.7,从收支平衡的概念测算出铝土矿的最低工业品位应该是4.5～5,按大型氧化铝厂基准投资收益率12%衡量,铝土矿区工业矿石平均铝硅比值下限是8。当最低工业品位铝硅比值等于5时,矿石中 Al_2O_3含量的下限应该是44%。因此,
The ore quality index and mining technical conditions of a karst-accumulating bauxite deposit in a certain place have been discussed in the article “Preliminary Discussion on Industrial Indicators of Karst-Accumulating Bauxite”, and will not be repeated here. According to the “bauxite geological prospecting,” the recommended regression equation to calculate the boundary grade is 2.7, calculated from the concept of balance of payments bauxite minimum industrial grade should be 4.5 to 5, according to a large alumina plant base investment Measured by 12% yield, the average aluminum-silicon ratio for industrial ores in bauxite is limited to 8. When the minimum industrial grade Al-Si ratio is equal to 5, the lower limit of the Al_2O_3 content in the ore should be 44%. therefore,