Abstract
铂钯精矿中氯化银的浸出预处理研究
Study on the Leaching Pretreatment of Silver Chloride in Platinum-Palladium Concentrate
Received:August 02, 2019  
DOI:
中文关键词: 铂钯精矿  氯化银  氨水  亚硫酸钠  浸出
英文关键词: platinum palladium concentrate  sliver chloride  ammonia  sodium sulfite  leaching
基金项目:国家重点实验室开放基金资助(GZSYS-KF-2020-008)
Author NameAffiliationE-mail
XU Juan Sclool of Metallurgical Engineering, Anhui University of Technology, Maanshan 243032, Anhui, China  
ZHANG Fu-yuan Sclool of Metallurgical Engineering, Anhui University of Technology, Maanshan 243032, Anhui, China 13939816876@163.com 
DING Ding Sclool of Metallurgical Engineering, Anhui University of Technology, Maanshan 243032, Anhui, China  
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中文摘要:
      铜阳极泥分铜液所得铂钯精矿中的银主要以氯化银(AgCl)形态存在,可用氨水或亚硫酸钠作为浸出剂去除银。绘制了Ag+与NH3、SO2- 3配体组分图,结合电位-pH图分析表明,氨浸的pH值范围为7.7~13.5,亚硫酸钠浸出宜在中性或碱性条件下进行。优化条件实验结果表明,银的氨浸浸出率为95.3%,碲浸出率为14.9%,有微量铂、钯浸出;以亚硫酸钠为浸出剂,银的浸出率为97.3%,碲浸出率为11.5%,金、铂和钯均不被浸出。亚硫酸钠更适于作为铂钯精矿预处理除银的浸出剂。
英文摘要:
      Silver in platinum-palladium concentrate obtained from the copper-rich solution of copper anode slime is mainly in the form of silver chloride, which can be removed by ammonia or sodium sulfite leaching agents. The diagrams of silver multiform complex with NH3, SO2- 3 ligands were drawn. The potential-pH diagram showed that the pH range of ammonia leaching was 7.7~13.5, and that sodium sulfite leaching should be carried out under neutral or alkaline conditions. The ammonia leaching rate of silver was 95.3%, and the tellurium leaching rate was 14.9%, and there were only trace amounts of leached platinum and palladium under the optimized experimental conditions. Using Na2SO3 as the leaching agent, the leaching rates of sliver and tellurium were 97.3% and 11.5% respectively, and gold, platinum and palladium were not leached. Sodium sulfite is more suitable as a leaching agent for removing silver from platinum palladium concentrates.
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