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Concentrating PGM from a PGM-Containing Ferroalloy by a Roast-Leach Process
Mining, Metallurgy & Exploration ( IF 1.5 ) Pub Date : 2021-06-14 , DOI: 10.1007/s42461-021-00441-8
Haigang Dong , Yuedong Wu , Yong Li , Jiachun Zhao , Yaxiong Wang

A roasting-leaching process has been developed for concentrating platinum group metals (PGM) from a PGM-containing ferroalloy. The optimized roasting conditions used a NaOH-to-ferroalloy mass ratio of 1.2 at 600 °C for 2 h. The roasted product mainly comprised Na4SiO4, NaFeO2 and Fe2O3. The iron oxide and sodium silicate associated with the roasted product were leached in water and dilute sulfuric acid solution, while the PGM was concentrated in the acid-leached residue. A PGM concentration of 23.4% was obtained with assaying, and the concentration factor of PGM from the ferroalloy to PGM concentration was greater than 9.



中文翻译:

通过焙烧浸出工艺从含 PGM 的铁合金中浓缩 PGM

已经开发出一种用于从含铂族金属的铁合金中浓缩铂族金属 (PGM) 的焙烧-浸出工艺。优化的焙烧条件使用 NaOH 与铁合金的质量比为 1.2,在 600 °C 下焙烧 2 小时。焙烧产物主要为Na 4 SiO 4、NaFeO 2和Fe 2 O 3。与焙烧产品相关的氧化铁和硅酸钠在水和稀硫酸溶液中浸出,而铂族金属则在酸浸出的残渣中浓缩。测定得到PGM浓度为23.4%,PGM从铁合金到PGM浓度的浓度系数大于9。

更新日期:2021-06-14
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