摘要
国外某含铜金矿碳酸盐含量较高,不宜采用硫酸预浸铜-浸铜渣氰化回收金的工艺.针对该含铜金矿的性质特点,开展了氨氰选择性浸金及浸出贵液臭氧除铜工艺试验研究,研究结果表明：在给矿粒度-0.074 mm95％,硫酸铵8kg/t,氰化钠0.4kg/t,石灰4kg/t（pH为9～10）,矿浆浓度40％,金浸出率约90.3％;氨氰浸出贵液初始pH=10～ 11,通入臭氧除铜,铜沉淀率达99.0％,金基本不损失,沉铜渣铜品位33.89％,可以铜精矿形式出售,为该矿的开发利用提供可行的技术方案.
The content of carbonate in a gold ore containing copper is relatively high, which is not fit for the technol- ogy of copper impregnation by sulfuric acid-cyanidation of copper leaching residues for the recovery of gold. Aimed at the ore properties,the research on the technology of selectively leaching gold of a foreign copper-gold ores with ammoia-cyanide leaching system and removing the copper of the leaching liquid with ozone was carried out. The re- suits indicate when the particle size is-0.074mm95 %, （ NH4 ） S04 is 8kg/t, NaCN is 0.4kg/t, Ca （ OH ） 2 is 4kg/t （pH=9-10） ,the pulp density is 40% ,the gold leaching is 90.3%. The leaching liquid by adding ozone to the wa- ter to remove the copper with the pH 10 ~ 11 ,the precipitation rate of copper is 99.0%with no loss of gold and the copper grade of the precipitate is 33.89% ,which can be sold in the form of copper concentrate and provides tech- nology for the exploitation and utilization of the ore.
出处
《矿产综合利用》
CAS
2014年第5期50-54,共5页
Multipurpose Utilization of Mineral Resources
基金
福建省科技合作重点项目:碳酸盐型含铜氧化金矿低成本提金工艺研究(201310014)
关键词
含铜金矿
氨氰法
臭氧
除铜
Gold ores containing copper
Ammoia-cyanide
Ozone
Copper removal
