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铀水冶厂一般有以下几个工序:(1)矿石的机械加工——使矿石的粒度小于铀的解离粒度,(2)浸出——最常用的是硫酸浸出;(3)通过矿浆洗涤进行固液分离;(4)用树脂吸附或溶剂苹取方法从很稀的溶液中回收铀;(5)使铀沉淀为黄饼,产品的干燥和包装。1970年,佩希内·于纪恩·库尔曼公司的“工程”子公司(化学企业技术公司)在非洲缺水的沙漠地区承建了一座铀水冶厂。该公司与法国原子能委员会合作,对所要加工的铀矿石进行了研究并发现这种矿石难以浸出,只有剩余酸度很高时,才能得到满意的浸出率。若用常规浸出方法,则会消耗大量硫酸。但是,如果将含水率低的矿石进行干磨并预热之后,再与一定量的硫酸和水混成团粒。这
Uranium hydrometallurgy generally has the following processes: (1) ore processing - making the ore size smaller than the dissociation of uranium, (2) leaching - the most commonly used is sulfuric acid leaching; (3) Liquid separation; (4) Uranium recovery from a very dilute solution by resin adsorption or solvent extraction; (5) Precipitation of uranium into yellowcake, product drying and packaging. In 1970, Pécsényuine Kohlmann’s “Engineering” subsidiary (Chemical Enterprise Technologies) contracted a uranium watermelon plant in a dry, desert area of Africa. The company, in cooperation with the French Atomic Energy Commission, conducted a study of the uranium ore to be processed and found it difficult to leach and obtain a satisfactory leaching rate only when the residual acidity is high. If the conventional leaching method, it will consume a large amount of sulfuric acid. However, if the low moisture content of the ore after dry grinding and preheating, and then with a certain amount of sulfuric acid and water mixed into pellets. This