某铀矿床中性浸出液中毒树脂再生技术研究  

Research on regeneration technology of poisoned resin from neutral leaching solution of a certain uranium deposit

作　　者：丁叶[1] 许影[1] 封宇[1] 原渊 DING Ye;XU Ying;FENG Yu;YUAN Yuan(Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC,Beijing 101149,China;Tongliao Uranium Co.,Ltd.,CNNC,Tongliao 028000,China)

机构地区：[1]核工业北京化工冶金研究院,北京101149 [2]中核通辽铀业有限责任公司,内蒙古通辽028000

出　　处：《中国矿业》2023年第6期160-166,共7页China Mining Magazine

基　　金：国家重点研发计划资助(编号:2020YFC1909804)。

摘　　要：针对某铀矿床水冶工艺中树脂中毒问题,通过浸出液化学组分分析和中毒树脂污染物表征结果,提出了影响树脂吸附容量的污染物为Si、有机物和Fe、Al、Ca等金属胶体沉积物。在此基础上,开展了酸、碱、络合助剂、氧化剂等对中毒树脂的再生试验,研究结果表明:酸性再生液有利于金属胶体沉积物的解吸;碱性再生液有利于Si和有机物的溶出;盐酸中加入0.1%柠檬酸可显著提高Fe、Al、Ca和Si的解吸效果;H_(2)O_(2)和NaClO等氧化剂可降解树脂上所吸附的大分子有机物,有利于有机物的洗脱。结合树脂再生试验结果,可优选出一种树脂再生方案:先采用10%HCl+0.1%柠檬酸对中毒树脂进行酸再生,再采用1%NaClO对树脂进行深度再生。采用该方案的再生树脂,可有效去除树脂上的污染物,实现树脂有效再生,树脂吸附容量恢复率达99.6%,再生后树脂饱和吸附容量为96.74 mg/mL。树脂在该厂铀水冶车间对再生后树脂进行动态吸附评价试验,该试验运行状态良好,直至吸附饱和时,树脂铀吸附容量可达96.50 mg/mL。In response to the problem of resin poisoning in the hydrometallurgy process of a certain uranium deposit,through the analysis of the chemical composition of the leaching solution and the characterization of toxic resin pollutants,it is proposed that the pollutants affecting the resin adsorption capacity are Si,organic matter,and metal colloidal deposits such as Fe,Al,Ca.On this basis,regeneration experiments are conducted on toxic resins using acids,alkalis,complexing agents,oxidizing agents.The research results show that acidic regeneration solution is beneficial for the desorption of metal colloidal deposits.Alkaline regeneration solution is beneficial for the dissolution of Si and organic matter.Adding 0.1%citric acid to hydrochloric acid can significantly improve the desorption effect of Fe,Al,Ca,and Si.Oxidants such as H_(2)O_(2) and NaClO can degrade the macromolecular organic matter adsorbed on the resin,which is beneficial for the elution of organic matter.Based on the results of resin regeneration experiments,a resin regeneration plan can be optimized which 10%HCl+0.1%citric acid is used for acid regeneration of the poisoned resin,and then 1%NaClO is used for deep regeneration of the resin.The regenerated resin using this scheme can effectively remove pollutants from the resin and achieve effective resin regeneration.The recovery rate of resin adsorption capacity reaches 99.6%,and the saturated adsorption capacity of the regenerated resin is 96.74 mg/mL.The resin is subjected to dynamic adsorption evaluation tests on the regenerated resin in the uranium hydrometallurgy workshop of the plant.The test is running well until the adsorption is saturated,and the resin s uranium adsorption capacity could reach 96.50 mg/mL.

关 键 词：铀矿床 树脂中毒 再生试验 树脂再生 

分 类 号：TD868[矿业工程—金属矿开采] TL212[矿业工程—矿山开采]