用阴离子交换树脂从含氯离子较高的硫酸浸出液中回收铀(二)负载树脂氯化铵溶液转型-水淋洗工艺研究

研究了用氯化铵溶液将SLD-225b树脂吸附的硫酸铀酰,转为氯化铀酰、水淋洗、碳酸氢铵沉淀工艺。与常规的硝酸铵溶液淋洗工艺相比,此工艺省去贫树脂转型,得到铀浓度较高的淋洗合格液和脱水、过滤性能良好的铀产品。用4倍树脂床体积氯离子质量浓度为179.8 g/L的氯化铵溶液转型、用3倍树脂床体积的水淋洗,贫树脂含铀<1 mg/g,淋洗效率>99%,试验条件下合格液铀质量浓度>30 g/L。

Recovering uranium from the sulphuric acid leaching liquor containing more chlorion with anion-exchange resin SLD-225b(二) A conversion with NH4Cl solution-elution with water process

A new eluting-precipitation process of converting the uranyl sulfate adsorbed on the resin SLD-225b into uranyl chloride with NH_4Cl solution,eluting uranyl chloride with water,and precipitating uranyl chloride with NH_4HCO_3 is studied.Compared with the NH_4NO_3 eluting process,the new process can cut converting process of barren resin form,the eluate has higher concentration of(uranium),and the product has perfect dewatering & filtration properties.When resin form is convert-ed into uranyl chloride with 4BV NH_4Cl solution in which the concentration of chloride ion is 179.8(g/L),and eluted with 3BV water,the barren resin contains uranium less than 1 mg/g,eluting efficiency is more than 99%,and the uranium concentration of eluate is more than 30 g/L under the test condition.