The locked cycle tests mainly based on collector H-4 and activator NS-6 demonstrate that silver concentrates grade are 0.45% at 84.5% Ag recovery.

• 以H-4为捕收剂、NS-6活化剂为主的用药制度下的闭路实验结果表明，银回收率达84.；5%25，银精矿品位为0