确定铀矿工业指标边界品位方法的探讨

本文以矿床利润总额,净现值,内部收益率和投资回收期的经济效果指标探讨铀矿工业指标的边界品位。在既定的铀产品价格条件下,根据铀品位具有对数正态分布规律的特点,揭示了提高边界品位会降低单位产品成本,降低边界品位会增加铀金属开采量及产品的销售收入,边界品位的升降影响销售收入与产品成本,可在其中寻求利润总额最大的边界品位。本文强调采用净现值法选择铀矿边界品位时,既要考虑净现值大小的经济效果,在满足基准收益率的要求下又要考虑铀资源的利用率。

ON DETERMINATION OF CUT OFF GRADE OF URANIUM ORE BODY

This article inquires into the cut off grade of uranium ore body with the following economic indicators, total profit, net present value, internal rate of return and payback period. On the basis of the feature of ortho-logarithmic distribution for uranium ore grade it is shown that as the cut off grade of uranium increases, the unit cost of uranium product decreases, and as the cut off grade of uranium decreases, the uranium yield and sale revenue increase. The optimum value of the cut off grade which can bring a maximum profit is found. In this paper an emphasis is given on net present value so as to select the cut off grade of uranium and to satisfy the basic rate of return and the utilization rate of uranium resources.