Study on Separation of Molybdenum from Crude Ammonium Tungstate Solution by Strong Base Anion Exchange Resin AITranslate

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Chinese Library Classification Number:TF841.1[冶金工程—有色金属冶金]

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The adsorption and separation of molybdenum from crude ammonium tungstate solution using ZGA351 macroporous strong base anion exchange resin were studied.The effects of resin type,sulfur content,aging time and temperature and pH of the feed solution,adsorption flow rate and adsorption temperature on the adsorption and separation of molybdenum by the resin were studied.The results show that using 100 mL ZGA351 resin in dynamic adsorption tests,the tungsten loss rate in the feed solution is only 0.54%when the tests are conducted under the optimal conditions of sulfur content of 1.1 times the theoretical amount,aging time at 40℃of 48 h,solution pH of 10.0,adsorption flow rate of 15 mL/h,and adsorption temperature of 40℃.The molybdenum penetration capacity of the resin is 107.77 g/L_(wet resin),which is 3.15 times higher than that of the HBDM-1 resin currently used in industrial production.In addition,the repeated experiments showcase good stability,and the average molybdenum-to-tungsten ratio of pure ammonium tungstate solution obtained after adsorption by ZGA351 resin is 0.88×10^-4,which meets the requirement of molybdenum-to-tungsten ratio of pure ammonium tungstate solution to be less than 2×10^-4for industrial production of APT products.In summary,the separation of molybdenum from crude ammonium tungstate solution by strong base anion exchange resin has the advantages of high molybdenum penetration capacity,low tungsten loss rate,high separation efficiency of tungsten from molybdenum,providing an effective technical reference for industrial applications.