Study on Treatment of Anode Mud Containing Rhenium and Ruthenium
Received:March 21, 2019  Revised:March 25, 2019
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DOI:doi:10.3969/j.issn.1007-7545.2019.10.012
KeyWord:ruthenium; rhenium; anode mud; oxidative leaching
              
AuthorInstitution
GUO RUI 西安瑞鑫科金属材料有限责任公司
XU Wan-xiang 西安瑞鑫科金属材料有限责任公司
WANG Jing-kun 西安瑞鑫科金属材料有限责任公司
ZHOU Yan 西安瑞鑫科金属材料有限责任公司
LI Jin 西安瑞鑫科金属材料有限责任公司
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Abstract:
      Anode mud containing ruthenium and rhenium was treated by acid oxidative leaching, alkali roasting, and water leaching. Effects of oxidation leaching acidity, temperature, mass ratio of liquid to solid (L/S), oxidant dosage, stirring rate, and leaching time on rhenium leaching rate were investigated. The results show that rhenium leaching rate is 99% above, and nearly 100% of W, Ta and Ru remains in leaching slag under the conditions including concentration of hydrochloric acid of 2 mol/L, temperature of 85 ℃, L/S=4, oxidant dosage of 1.4 times of theoretical consumption, stirring rate of 200 r/min, and leaching time of 2.5 h. Separation of rhenium and other rare metals is realized. The oxidized leaching slag is treated by conventional alkaline oxidizing roasting, water leaching, and distillation to realize separation of Ru and W and Ta. W and Ta can be recovered from distillation solution and water leaching residue, respectively.
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