提高某低品位斑岩型铜钼矿石混浮精矿指标试验

Experiments on Cu-Mo Mixed Concentrate Index Improving for a Low Grade Porphyry Cu-Mo Ore

某斑岩型铜钼矿石铜、钼品位分别为0.339%和0.022%,现场在磨矿细度为-0.074 mm占60%的情况下,先采用1粗3精3扫、中矿顺序返回流程获得铜钼混合精矿,再进行铜钼分离,但混合精矿Cu、Mo品位分别仅为17.23%、0.629%,Cu、Mo回收率分别仅为86.40%、48.60%。为改善混合浮选指标,在现场磨矿细度下进行了药剂优化研究。结果表明,在选矿工艺流程不变的情况下,用捕收剂Pj-053+荆江钼替代Pj-053+变压器油,最终可获得铜、钼品位分别为18.89%、1.023%,铜、钼回收率分别为92.50%、77.19%的铜钼混合精矿,与现场生产指标比较,混合精矿Cu、Mo品位分别提高了1.66、0.394个百分点,Cu、Mo回收率分别提高了6.10、28.59个百分点,指标改善显著。

The copper and molybdenum content of a low grade porphyry Cu-Mo ore are 0. 339% and 0. 022%, respec- tively. Cu-Mo mixed concentrate which will endure separation of copper from molybdenum, with Cu grade and recovery of only 17.23% and 86.40% ,and Mo grade and recovery of only 0.629% and 48.60% was obtained fristly through the closed-circuit process of one roughing, three cleaning and three scavenging at the grinding fineness of 60% passing 0.074 mm. Reagents opti- mization experiments were conducted at the grinding fineness of on-site process to improve the bulk flotation index. The results indicated that：the collector of P j-053 ＋transformer oil replaced by Pj-053 ＋Jingjiang-molybdenum in the original process, Cu-Mo mixed concentrate with Cu grade and recovery of 18.89% and 92.50% ,and Mo grade and recovery of 1. 023% and 77.19% were obtained respectively. Compared with the on-site process,mixed concentrate of Cu and Mo grade increased 1.66 and 0. 394 percentage points, Cu and Mo recovery increased 6.10 and 28.59 percentage points. Index was improved significantly.