铂钯精矿制备高纯铂的工艺研究  

Study on Preparation of High Purity Platinum from Pt-Pd Concentrate

作　　者：孙敬韬 黄绍勇 陈善文 刘永平 SUN Jing-tao;HUANG Shao-yong;CHEN Shan-wen;LIU Yong-ping(Guixi Smelter,Jiangxi Copper Company Limited,Guixi 335424,Jiangxi,China)

机构地区：[1]江西铜业股份有限公司贵溪冶炼厂,江西贵溪335424

出　　处：《有色金属（冶炼部分）》2021年第6期78-83,共6页Nonferrous Metals（Extractive Metallurgy)

摘　　要：针对传统"王水溶解—氯化铵反复沉淀法"从铂钯精矿提取铂的过程中存在氮氧化物难治理、赶硝不彻底造成钯超标等问题,提出了"氯酸钠溶解—水解—丁二酮肟除钯—水合肼还原精炼"全湿法短流程,从铂钯精矿提取高纯铂的新工艺方案。结合工业生产实践对该新工艺的流程和原理进行详细分析,并确定了各阶段的最佳反应条件。该工艺可以稳定产出满足SM-99.95的海绵铂,铂直收率高达98%。新工艺流程简单,原料适应性强,成本低、易操作。To address difficult treatment of nitric oxide and palladium in platinum products exceed standard due to incomplete denitration during prepare platinum from Pt-Pd concentrate by traditional process of dissolving with aqua regia and repeated precipitation with ammonium chloride,a new hydrometallurgy short process for extracting high purity platinum from Pt-Pd concentrate,sodium chlorate dissolution,hydrolysis,palladium removal with dimethylglyoxime and reduction refining with hydrazine hydrate,was proposed.Combined with industrial production practice,technological process and principle of new scheme were analyzed and the optimum reaction conditions in each stage were determined.The plant practices show that sponge platinum meeting standard of SM-99.95 with direct recovery rate of platinum of 98%is stably prepared.New process has the advantages of simple,strong adaptability to raw materials,low cost and easy to operate.

关 键 词：铂 水解 直收率 还原精炼 湿法工艺 

分 类 号：TF833[冶金工程—有色金属冶金]