含铜矿石提金新工艺研究

New technology to extract gold from copper-bearing gold ores

本文探讨了一种选冶联合流程来从含铜浮选精矿中提取金铜,研究了一种新型铜浸出剂一CSUT(ad),其特点是浸铜能力大、挥发性低、循环使用率高,特别适合于消除铜锌矿物对氰化浸金的干扰.对河台金矿进行的实验表明,使用这种铜浸出剂可使氰化浸金率提高20%以上,且采用预浸铜→氰化提金的两段浸出工艺优于铜金混合浸出工艺,浮选实验说明了浮选是从浸金渣中综合回收铜的有力手段,最终尾矿中含铜低于0.6%,金低于4g/t.

In this paper, a new process flow to leach out Au/Cu from flotation concentrates containing copper and a new leaching reagent of copper-CSUT(ad) are studied This reagent is characterized .by large leaching capacity of Cu, low vaporization rate and high recycling efficiency. It is especially useful in abolishing interference of copper/zinc minerals in cyanide leaching of gold. The experiments on Hedai ores show that the gold recovery can be increased by 20% when using CSUT(ad) in cyanidation. The two-stage process of preleaching Cu and cyanide leaching of gold is advantageous over the mixed leaching of Cu/Au. The flotation tests demonstrate that copper can be recovered conveniently from the leaching residue. The contents of Cu/Au in the final tailings are as low as≤0.6% and≤4g/t respectively.