摘要
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 law of contribution and concentration of precious metals with different grades is investigated in nickel carbonylation processes. Materials consisting of Cu-Ni alloy,high grade precious metals slimes and high nickel matte are handled by carbonylation at 160℃ and 1087 kPa CO pressure for 48h.The result shows that with raw materials containing 0.03%～ 0.3% Au and Pt the nickel carbonylation rate is over 97%, but gold,platinum metals and silver can not be carbonylated.The precious metals are concentrated in carbonylation remaining slags without loss.At the same time Co,Cu,As,Se have different concentration levels.Refining nickel and concentrating precious metals by carbonylation process can decrease the dissipation and loss of precious metals,and improve the total recovery of precious metals and other metals.
出处
《有色金属》
CSCD
1998年第3期80-84,共5页
Nonferrous Metals
关键词
镍羰化
贵金属
富集
nickel
carbonylation,precious metals
concentration
