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研究了含镍物料中不同品位的贵金属在镍羰化过程中的走向和富集规律。试验采用了羰化法对由一次铜镍合金,高品位贵金属阳极泥和高冰镍组成的熔炼物料在如下工艺条件:一氧化碳压力10787kPa、时间48h、温度160℃进行处理。结果表明:金和铂族金属含量在0.03%~0.3%范围内的含镍物料经羰化处理后,镍的羰化合成率>97%。而金和铂族金属没有羰化,银也未羰化,无任何流失,都富集在羰化残渣内。同时,钴、铜、砷、硒也均有不同程度的富集。采用羰化法精炼镍并富集贵金属无疑可以减少贵金属的分散和流失,从而可提高贵金属的总回收率及其它金属的回收。
The trend and enrichment regularity of different grade precious metals in nickel-containing materials during nickel carbonylation process were studied. The carbonylation process was used to treat the smelting material composed of a copper-nickel alloy, a high-grade noble metal anode mud and a high-nickel matte with the following process conditions: carbon monoxide pressure 10787kPa, time 48h and temperature 160 ℃. The results show that the carbonylation rate of nickel is over 97% after the carbonization treatment of the nickel-containing materials containing gold and platinum group metals in the range of 0.03% ~ 0.3%. The gold and platinum group metal is not carbonylation, silver is not carbonylation, without any loss, are enriched in carbonylation residue. At the same time, cobalt, copper, arsenic, selenium also have different levels of enrichment. The use of carbonylation of nickel and enrichment of precious metals undoubtedly can reduce the dispersion and loss of precious metals, which can increase the total recovery of precious metals and other metals recovery.