广西某半氧化铜矿石预脱碳加温硫化浮选试验

Experiments of Preliminary Decarburization and Heat Sulphidizing Flotation Processing for a Semi-oxidized Copper Ore from Guangxi

广西某铜矿石铜氧化率在27%以上,且含1%左右的碳质,属难选半氧化铜矿石。矿山选矿厂采用直接常温浮选工艺处理该矿石,铜精矿品位只有18%左右且回收率不到60%。为了给现场工艺流程改造提供依据,以硫化钠为硫化剂、丁黄药+DY组合为捕收剂,在60℃下对该矿石进行了预脱碳加温硫化浮选试验,获得了Cu品位为20.57%、Cu回收率为62.75%的铜精矿,与现场生产相比,选别指标得到了显著提高。

A certain copper ore in Guangxi has the copper oxidation rate of more than 27%, and contains about 1% of the carbonaceous matter. It belongs to the refractory semi-oxidized copper ore. The direct flotation process at room temper- ature was selected to handle this kind of ore by the concentrator, and copper concentrate with the copper grade of only about 18% and recovery of less than 60% was obtained. In order to provide the basis for transformation of the on-site process, and taking sodium sulfide as vulcanizing agent and the combination of butyl xanthate ＋ DY as collector, experiments of the pre- liminary decarburization and heat vulcanization process at 60 ℃ were carried out, obtaining copper concentrate grading at 20. 57% with Cu recovery of 62. 75%. Compared with the on-site production, the beneficiation indicators have been signifi- cantly improved.