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首页> 外文会议>32nd Annual Hydrometallurgy Meeting and International Conference on the Practice and Theory of Chloride/Metal Interaction, Vol.2, Oct 19-23, 2002, Montreal, Quebec, Canada >Study of Hydrochloric Acid Use in Heap Leaching Operations
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Study of Hydrochloric Acid Use in Heap Leaching Operations

机译：堆浸操作中盐酸的使用研究

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摘要

The results of leaching cobalt and copper from a static bed of an oxide lateritic ore using acidic chloride solutions are presented. The leaching tests of the 0.2 to 25 mm size fractions ore samples were performed in glass columns. The ore beds sprinkled with a solution of 2M MgCl_2 in 2 wt.% HCl were 122 to 315 cm in height. Over 92% cobalt and copper recovery was achieved after 3 to 6 weeks of leaching. The leaching period was many times longer when access of the leaching solution to some parts of the ore bed was blocked by precipitated products of metals hydrolysis and due to spontaneous disintegration of fine fractions of the ore into smaller particles. Engineering aspects related to the control of the process and to the minimisation of the volatile HCl loss, were investigated during pilot leaching of a 200-ton heap of the same ore. For the recovery of marketable products and for the regeneration of the leaching agent from the produced leach solutions, standard processes could be applied. Results of performed tests and some economic approaches are presented.
机译：给出了使用酸性氯化物溶液从氧化物红土矿石的静态床中浸出钴和铜的结果。在玻璃柱中对0.2至25毫米大小的矿石样品进行浸出测试。撒有2M MgCl_2在2 wt。％HCl中的溶液的矿床高度为122至315 cm。浸出3至6周后，钴和铜的回收率超过92％。当浸出溶液进入矿石床某些部分时，浸出时间要长很多倍，这是由于金属水解的沉淀产物以及由于矿石的细小部分自发分解成较小的颗粒所致。在200吨相同矿石堆的中试浸出过程中，研究了与工艺控制和挥发性HCl损失最小化相关的工程方面。为了回收可销售的产品并从生产的浸出溶液中再生浸出剂，可以采用标准工艺。介绍了进行的测试结果和一些经济的方法。

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