摘要
介绍了含砷硫高碳卡淋型金矿石的成分、工艺矿物学特征。采用焙烧 氰化浸出工艺提取金,考察了焙烧温度、时间、固化剂加入量、矿石粒度及氰化浸出时NaCN用量对金浸出率的影响,探讨了焙砂中硫化物物相改变及金难于浸出的原因。结果表明,矿石焙烧后,硫化矿物物相及工艺性质发生了显著变化,由还原态转变成了氧化态,金的氰化浸出率达89 9%。焙烧渣中的金主要残存于碳酸盐和硅酸盐中,很难再被浸出。
Mineral composition and mineralogical characters of Carlin gold ore containing C,As,S are introduced Extraction of gold by roastcyanide leaching process, the effects of roast temperature, time, addition of solidifying agent, ore granularity and dosage of NaCN on leaching gold are examined The reasons of phases changing of sulfide in roasted product and leaching gold difficulty are discussed The results show that sulfide phases and technological characters change obviously after ore being roasted The ore transforms from reduction state to oxidation state Cyanide leaching rate of gold is 899%. Most of gold remaining in carbonate and silicate in roasted product is difficult to be leaching out.
出处
《湿法冶金》
CAS
2003年第3期129-132,共4页
Hydrometallurgy of China
