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在有色金属、稀有金属和铀钍等放射性元素的湿法冶金中,需要控制工艺流程中浸出液、萃原液、淋洗液以及废弃液中的微量金属。在现场及时地对样品进行分析,对控制工艺过程和提高金属的提取效率有十分重要的意义。例如,将铀矿石的碳酸盐浸出液循环地通过离子交换树脂床,能更有效地从溶液中分离铀。一旦离子交换树脂床流出液中铀的浓度低于几个ppm时,再进一步循环也不能改善铀的回收,显然,能在现场对铀样品进行自动分析是十分有意义的。近年来国内外十分重视全自动比色分析器的研制和应用,以下以铀的水冶工艺为例,对1978年以来报导的全自动比色分析器的概况作一简要介绍。
In the hydrometallurgy of radioactive elements such as non-ferrous metals, rare metals and uranium and thorium, it is necessary to control the trace metals in the leachate, extraction liquid, eluent and waste liquid in the process. It is very important to analyze samples in time to control the process and improve the efficiency of metal extraction. For example, uranium can be more efficiently separated from the solution by circulating carbonate leachate from uranium ore through the bed of ion exchange resin. Once the ion exchange resin bed effluent uranium concentrations below several ppm, further recycling can not improve uranium recovery, apparently, in the field of uranium samples for automatic analysis is of great significance. In recent years, attaches great importance to the development and application of automatic colorimetric analyzer at home and abroad, the following uranium hydrometallurgical process, for example, made a brief introduction of the automatic colorimetric analyzer reported since 1978.