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首页> 外文会议>AusIMM International Uranium Conference >A Novel Approach to Recover Uranium from Loaded Solvents in Uranium Solvent Extraction Circuits
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A Novel Approach to Recover Uranium from Loaded Solvents in Uranium Solvent Extraction Circuits

机译：一种新的铀溶剂萃取电路中溶剂回收铀的新方法

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摘要

A new chemical process to recover uranium from loaded amines is described.The process is suitable for the recovery of uranium from acidic leach liquorsby solvent extraction with amines and is potentially a viable alternative to theammonia and strong acid strip processes. Stripping of uranium is achievedwithout the addition of external reagents for pH control, which eliminatesthe risk of localised uranium precipitation in mixers. This issue is prevalentwith ammonia stripping. The process generates loaded strip liquor that issuitable for uranium recovery by conventional precipitation using hydrogenperoxide, albeit without the addition of external reagents for pH control.The process requires the use of a relatively benign matrix solution, whichprovides the hydroxide ions necessary for stripping and precipitation.Expensive and/or hazardous reagents, such as ammonia, strong sulfuricacid or sodium carbonate, are not required. The main reagent consumed islimestone, which is used for sulfate removal from the strip solution bleedstream via the precipitation of gypsum.
机译：描述了从加载胺回收铀的新化学方法。该方法适用于酸性浸出液体溶剂萃取用胺的溶剂萃取，并且可能是脑膜和强酸条带工艺的可行替代品。剥离铀的剥离是对pH控制的外部试剂的添加，这消除了混合器中局部铀沉淀的风险。这个问题是普遍的氨水剥离。该方法产生负载的条带液，可通过使用氢气氧化常规沉淀的常规沉淀的铀恢复，尽管没有添加外部试剂的pH控制。该方法需要使用相对良性的基质溶液，这将剥离和沉淀所需的氢氧化物离子。不需要昂贵和/或危险的试剂，例如氨，强硫酸或碳酸钠。主要试剂消耗的是胰岛素，其用于通过石膏沉淀从条带溶液膨胀中除去硫酸盐。

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