Under situation decreasing in gold grades of ores ,the new floatation agents and its system were applied maintaining the technical indexes and getting better economical results.

• 四道沟分矿选矿厂通过应用新浮选药剂,改变原有药剂制度,在原矿品位逐年下降形势下,保持稳定了浮选技术指标,经济效果明显。