Abstract

Electrolytic recovery of platinum metals onto electrodes of fibrous carbon materials from solutions formed by processing of copper–nickel ores, gold- and silver-containing concentrates (gold and silver refining), platinum–rhenium catalysts, and simulated solutions from spent nuclear fuel reprocessing was studied. Combined flowsheets including electrolysis with fibrous carbon electrodes, anodic labilization of platinum metal compounds, extraction, and ion exchange were used. Platinum metals were recovered to low residual concentrations from sulfuric acid, hydrochloric acid, hydrochloric acid + thiourea, ammonia–ammonium, nitric–nitrous acid, and nitric acid solutions. The following processes were used: electrolysis at constant and varied current density, deposition–anodic dissolution, and deposition–dissolution in the short-circuited electrochemical system fibrous carbon material–metal alloy–electrolyte solution. Some processes were successfully trialed on the semicommercial and commercial scales. Trials were performed using semicommercial electrolyzers with fibrous carbon electrodes, developed in cooperation with the special designing bureau of mining and dressing equipment.

中文翻译：

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纤维碳电极电解可回收矿物和二次原料中的铂金属

摘要

通过处理铜-镍矿石，含金和银的精矿（金和银精炼），铂-catalyst催化剂以及废核燃料后处理的模拟溶液，将铂金属电解回收到纤维状碳材料的电极上。研究。使用了包括用纤维状碳电极进行电解，铂金属化合物的阳极稀化，萃取和离子交换的组合流程图。从硫酸，盐酸，盐酸+硫脲，氨-铵，硝酸-亚硝酸和硝酸溶液中回收铂金属至低残留浓度。使用了以下过程：恒定电流密度和变化电流下的电解，沉积-阳极溶解，和沉积–在短路电化学系统中的溶解-碳纤维材料–金属合金–电解质溶液。在半商业和商业规模上成功地试用了一些过程。与采矿和选矿设备的特殊设计局合作开发的带有纤维碳电极的半商业电解槽进行了试验。