非碱性浮铜新工艺工业试验研究

The industrial research on a new technology for non-alkaline copper flotation

广东某大型铜硫矿矿石富含磁黄铁矿型铜硫矿和黄铁矿型铜硫矿,因露天开采,矿物表面易氧化.采用常规的强碱浮铜工艺,生产指标波动较大.对此,研究开发出非碱性浮铜工艺,即在铜粗选中加少量石灰调矿浆pH=7左右,同时加入特效调整剂CW.在原矿中磁黄铁矿与黄铁矿的比例以及黄铁矿型氧化矿含量不同的情况下,获得较好的工业试验指标:铜精矿Cu品位19.59%~24.12%、铜回收率83.03%~85.91%,硫精矿S品位37.86%~40.46%、磁硫精矿S品位30.02%~32.89%,总硫回收率90.14%~93.12%.

A large-scale copper and sulfur ore in Guangdong is rich in pyrrhotite copper pyrite and pyrite copper and sulfur ore,due to surface mining, mineral surface easily oxidized. As a result,the ore surface is oxidized easily. With conventional strongly alkali copper flotation processing flow, the production indexes fluctuated wildly. When using non-alkaline copper flotation processing flow, good indexes were obtained in industrial tests for the raw ore with different proportion of pyrrhotite and pyrite and different content of pyrite-type oxidized ore,the grade of copper concentrate was 19.59%-24.12%, the copper recovery was 83.03%~85.91% ,the grade of sulfur concentrate was 37.86%-40.46% ,the grade of sulfur in magnetic sulfur concentrate was 30.02~32.89%, the total sulfur recovery was 90.14-93.12%.