【摘要】 对熔炼铁捕集物采用两段逆流浸出工艺富集铂族金属进行研究。结果表明,在铁捕集物粉粒度为–0.425 mm,一段浸出温度为常温,浸出硫酸浓度为1.7~1.8 mol/L,固液比(S:L)=1:10,反应时间为0.5 h;二段浸出温度为75℃,浸出硫酸浓度为2 mol/L,S:L=1:50,反应时间为4 h。经此两段浸出后,铂族金属的平均富集倍数为70.6,铂族金属回收率大于99.8%。更多还原

【Abstract】 The enrichment process of platinum group metals(PGMs) in the PGM-bearing iron-trapping material was investigated by using the "two-stage countercurrent leaching" technology. When particle size of iron-trapping material was –0.425 mm, the experimental condition for the first stage leaching was room temperature, sulfuric acid concentration of 1.7~1.8 mol/L, solid and liquid ratio(S:L) of 1:10 and leaching for 0.5 h, while that for the second stage leaching was 75℃, sulfuric acid concentration of 2 mol/L, solid and liquid ratio of 1:50 and leaching for 4 h. After two stages leaching, PGMs were enriched about 70.6 times in the iron-trapping material and at least 99.8 % of PGMs could be recovered.更多还原