强碱性阴离子交换树脂的钨钼解吸试验研究  

Tungsten and Molybdenum Desorption of Strong Basic Anion Exchange Resin

作　　者：王露露 王欣欣 王俊杰 陈利革 刘德智 罗凯 WANG Lulu;WANG Xinxin;WANG Junjie;CHEN Lige;LIU Dezhi;LUO Kai(Luoyang Luanchuan Molybdenum Group Tungsten Co.,Ltd.,Luanchuan 471500,China)

机构地区：[1]洛阳栾川钼业集团钨业有限公司,河南栾川471500

出　　处：《湿法冶金》2024年第1期74-79,共6页Hydrometallurgy of China

摘　　要：研究了以NaOH+NaNO_(3)为解吸剂、H_(2)O_(2)为强氧化剂,联合从ZGA351大孔强碱性阴离子交换树脂中解吸钨、钼。考察了联合解吸剂组成、NaOH浓度、NaNO_(3)浓度、H_(2)O_(2)浓度及加入量、NaOH+NaNO_(3)/H_(2)O_(2)流速比、解吸次数对钨、钼解吸效果的影响。结果表明:在NaOH浓度1.5 mol/L、NaNO_(3)浓度5%、H_(2)O_(2)加入量为理论量1.2倍、H_(2)O_(2)浓度30%、NaOH+NaNO_(3)/H_(2)O_(2)流速比40条件下进行6次解吸,钨、钼解吸率分别达99.48%、99.38%,树脂的钼穿透吸附量107.10 g/L,与新树脂的钼穿透吸附量107.77 g/L相当,说明ZGA351树脂进行一次解吸—循环吸附后对钼的吸附性能基本保持不变;一次解吸液中钨质量浓度3.82 g/L,钼质量浓度10.71 g/L,钼钨比2.80,调酸后可直接投入工业生产后续工段用于制备钼酸铵产品;30次解吸—吸附循环试验结果表明,树脂使用寿命可满足工业生产成本要求。该法同步完成了解吸液氧化和树脂再生,可简化工艺流程,降低生产成本,为大孔强碱性阴离子交换树脂的解吸工艺提供一种可行的工艺路线。The desorption of tungsten and molybdenum from ZGA351 porous strong basic anion exchange resin using NaOH+NaNO_(3)as desorption agent and H_(2)O_(2)as strong oxidant was studied.The effects of combined adsorbent composition,concentration of NaOH,concentration of NaNO_(3),concentration and dosage of H_(2)O_(2),flow rate ratio of NaOH+NaNO_(3)/H_(2)O_(2)and desorption times on the desorption of tungsten and molybdenum were investigated.The results show that under the conditions of NaOH concentration of 1.5 mol/L,NaNO_(3)concentration of 5%,H_(2)O_(2)addition of 1.2 times the theoretical doasge,H_(2)O_(2)concentration of 30%,the NaOH+NaNO_(3)/H_(2)O_(2)flow rate of 40 for 6 times,the tungsten and molybdenum desorption rate are 99.48%and 99.38%,respectively.The molybdenum penetration adsorption capacity of the resin is 107.10 g/L,which is similar to that of the new resin 107.77 g/L,indicating that the adsorption properties of ZGA351 resin remained basically unchanged after one desorption and cyclic adsorption.The mass concentration of tungsten in the primary desorption solution is 3.82 g/L,the mass concentration of molybdenum is 10.71 g/L,and the ratio of molybdenum to tungsten is 2.80.After adjusting the acid,it can be directly put into the subsequent industrial production section to make ammonium molybdate products.The results of 30 desorption and adsorption cycles show that the service life of the resin can meet the requirements of industrial production cost.The method synchronizes the process of liquid absorption oxygenation and resin regeneration.The process is simplified,the production cost is reduced,and a feasible process route is explored for the desorption process of large pore strong basic anion exchange resin.

关 键 词：钨 钼 强碱性阴离子交换树脂 分离 解吸 吸附 氧化 再生 

分 类 号：TF841.1[冶金工程—有色金属冶金] TF803.23[理学—物理化学] O647.3[理学—化学]