刚果(金)SICOMINES高氧化率铜钴矿浮选效果提升研究与生产实践

Research and production practice on flotation effect improvement of SICOMINES high oxidation rate copper-cobalt ore in Congo(Kinshasa)

刚果(金)SICOMINES高氧化率铜钴矿生产过程中发现,由于浮选机加药管位置不合理,导致浮选药剂与矿物作用效果较差,药剂单耗较高,且通过试验发现pH值较高的尾矿浓密机回水含有部分有效的浮选药剂成分,添加到氧化段中,有利于提高氧化段精矿铜品位及回收率。因此,选矿厂通过对现场浮选机结构和矿浆流动特性进行分析,并进行实验室试验,对浮选机和现场浮选工艺进行改造,即通过将浮选机加药管延伸到夹底板以下,以及将尾矿浓密机回水添加到氧化段中。改造后,硫氢化钠和黄药较改造前分别降低了3.80 kg/t矿和0.07 kg/t矿,降幅为42.70%和14.29%;氧化铜精矿和浮选钴精矿合计铜品位、钴品位分别提高了1.09个百分点和0.03个百分点,铜回收率、钴回收率分别提高了0.51个百分点和0.72个百分点;总精矿铜回收率、总精矿钴回收率较改造前分别提高了0.69个百分点和0.71个百分点。

During the production process of SICOMINES high oxidation rate copper-cobalt ore in Congo(Kinshasa),it is found that due to the unreasonable position of the dosing tube of the flotation machine,the effect of the flotation reagents and minerals is poor,the unit consumption of reagents is high,and through experiments,it is found that the backwater of tailings thickeners with higher pH value contains some effective flotation reagent components,adding to the oxidation section is beneficial for improving the copper grade and recovery rate of the concentrate in the oxidation section.Therefore,the concentrator analyzes the structure of the on-site flotation machine and the flow characteristics of the pulp,as well as conducts laboratory tests,and transforms the flotation machine and the on-site flotation process,that is,by extending the dosing tube of flotation machine to the clamping floor,and adding the backwater of tailings thickeners to the oxidation section.After transformation,sodium hydrosulfide and xanthate are reduced by 3.80 kg/t ore and 0.07 kg/t ore respectively,42.70%and 14.29%lower than before transformation;the total copper grades and total cobalt grades of copper oxide concentrate and flotation cobalt concentrate are respectively increased by 1.09 percentage points and 0.03 percentage points, the recovery rate of copper and cobalt increased by 0.51 percentage points and 0.72 percentage points respectively, and the recovery rate of copper and cobalt in the total concentrate increased by 0.69 percentage points and 0.71 percentage points respectively compared with before transformation.