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721矿矿点多,矿石性质差异大,属于较难浸矿石。由于各矿点的生产能力和不同的矿石性质等问题,引起采冶难于协调,致使水冶过程中用酸量、铀浸出率的波动较大,造成金属损失和原材料的浪费。针对这一情况,前几年已从试验到生产做了大量的研究。但是,由于几次试验的矿石性质、条件各异,无法进行比较。现从生产实际出发,把延长浸出时间和不同浸出方式对浸出率的影响,在相同条件下进行系统比较,并就降低矿石粒级对浸出率的影响作新的探索。试验用矿样的粒级组成及其化学分析结果列于表1、2。为便于比较,表3列出了1982年试验用矿样的化学分析结果。
721 mine more points, different nature of the ore, belonging to more difficult to leach ore. Due to the production capacity of different ore points and different ore properties, it is difficult to coordinate the mining and metallurgy. As a result, the acidity and the leaching rate of uranium fluctuate greatly during the hydrometallurgy process, resulting in metal loss and waste of raw materials. In view of this situation, a great deal of research has been done from experiment to production in recent years. However, due to the nature of the ores tested several times, the conditions can not be compared. Starting from the actual production, to extend the leaching time and different leaching methods on the impact of leaching rate, under the same conditions for systematic comparison, and to reduce the impact of ore size on the leaching rate to make a new exploration. The particle size composition and chemical analysis results of the test ore samples are shown in Tables 1 and 2. For ease of comparison, Table 3 lists the results of the chemical analysis of the 1982 test mineral.