论文部分内容阅读
采矿过程中,不可避免地要产生一定数量的矿石损失和贫化。如所周知,无论是分析评价采矿方法及结构参数的优劣,还是确定崩落法放矿合理截止品位等,矿石的损失与贫化都是很重要的指标。本文着重从理论和实际分析讨论了回贫差(或回采效率)指标的实质与问题,从而提出回贫差曲线仅仅反映矿石回收率与贫化率的增长变化情况,但不能用最大回贫差(或回采效率)值来确定放矿截止品位,也不能用它来比选采矿方法及其结构参数等。由于回贫差及回采效率指标,既不能综合代替矿石损失贫化指标,同时在技术经济分析中也起不到有价值的作用,还会造成混乱,故建议今后不再使用。
In the mining process, it is inevitable to produce a certain amount of ore loss and depletion. As we all know, the loss and depletion of ores are very important indicators both in analyzing and evaluating the pros and cons of mining methods and structural parameters or in determining the reasonable cut-off grade for caving in caving. This paper focuses on the theoretical and practical analysis to discuss the essence and problems of poverty reduction (or recovery efficiency) indicators, and then proposes that the regression of poverty curve only reflects the growth and recovery of ore recovery rate and dilution rate, but can not use the maximum poverty return difference (Or recovery efficiency) value to determine the ore cut-off grade, it can not be used to compare mining methods and their structural parameters. As poverty reduction and recovery efficiency indicators can neither replace the ore loss and depletion indicators in a comprehensive way, nor do they play a valuable role in the technical and economic analysis, they can cause confusion and therefore are not recommended for future use.