【摘 要】
：
It is difficult to separate antimony from bismuth in the process of crude refining.The electro refining of high-bismuth antimony was studied using ammonium
【机 构】
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Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Ku
【出 处】
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第五届国际湿法冶金学术会议(5th International Conference on Hydrometallurg
论文部分内容阅读
It is difficult to separate antimony from bismuth in the process of crude refining.The electro refining of high-bismuth antimony was studied using ammonium fluoride-antimony sulphate electrolyte system.The influences of temperature, current density and additives on bismuth removal from crude antimony were discussed.The effect of additives on morphologies of cathodic deposition layer was investigated by scanning electron microscopy (SEM) techniques.Optimum process parameters,namely, temperature of 25 ℃, current density of 400 A/m2, distance between anode and cathode of 50 mm, electrolytic period of 24 h, oxalic acid dosage of 10 g/L were ascertained.The result shows that electro crystallization of antimony follows the screw dislocation growth mechanism with a trigonal pyramids structure, and addition of oxalic acid to electrolyte has no remarkable change in it if the dosage is appropriate.
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