New Technology of High Carbon and Arsenic Bearing Gold Ore Processing
The innovative point of this new technology can be described that under normal pressure and 70℃,using a new combined activating and oxidizing agent,the minerals bearing arsenic and organic carbon are oxidized effectively.This technology can be applied in commercial scale.The high carbon and arsenic bearing gold ore is taken from Gansu,where hundreds of tons gold deposit.The ore has 0.51% of arsenic and 1.75% of carbon (1.07% of organic carbon).The gold occurs mainly in native with particle size 0.02～0.6 mm and a few are enwrapped by pyrite and arsenopyrite.The traditional cyanide leaching process gains a very low gold leaching rate with only 5%.Through systemic experimental study,the technological flowsheet of flotation process for concentrating gold,then pre-treating the gold concentrate followed by cyanide leaching the gold concentrate are used.With 4.92 g/t gold of head sample,the gold concentrate with 46.52g/t gold grade and 96.53% gold recovery is gained by flotation process.Followed by pre-treatment for 6 hours,the gold concentrate is leached with cyanide after filtration and washing.The total gold leaching rate is up to 95.44%.
High carbon Arsenic bearing gold ore Traditional cyanide leaching process
Z.B.Pan X.F.Bai W.L.Xiong
Institute of Multipurpose Utilization of Mineral Resources,Chengdu,China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
4014-4018
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）