响应曲面法优化氧化铜渣浮选提铜工艺

江西某炼铜炉渣含铜量高，具有较高的经济价值。由于该铜渣中铜矿物以氧化矿为主，且硫化矿表面被氧化，直接浮选铜回收率低、经济效益差。通过添加活化剂，活化氧化铜矿物，并利用响应曲面中心复合设计原理对浮选工艺条件进行优化，研究氧化钙、硫化钠、Z-200对浮选效果的响应。结果表明，Z-200用量是影响精矿品位和回收率的主要因素，且各响应因素间存在交互效应，在CaO用量为25 g/t，Na₂S用量为500 g/t，Z-200用量为100 g/t的最优条件下，闭路试验获得精矿平均品位12%，精矿铜回收率为86.57%，采用该浮选优化工艺能获得较好的回收效果。

Optimization of recycling copper from copper oxide smelting slag by response surface methodology

The copper smelting slag with high copper content from Jiangxi has high economic value. Due to the copper mineral in the copper slag is mainly oxidized ore and the surface of the sulfide ore is oxidized, the copper recovery rate is low and the economic efficiency is poor. In this study, the copper oxide is activated by the addition of activator. To optimize the process conditions, the reaction surface methodology and the center composite design principle are used to investigate the response of the calcium oxide, sodium sulfide and Z-200 collector. The results show that the amount of Z-200 is the main factor affecting the grade and recovery rate of concentrate, and there are interaction effects among the response factors. The flotation index of close circuit test was achieved under the optimum conditions:CaO of 25 g/t, Na₂S of 500 g/t and Z-200 of 100 g/t. The average grade of Cu in flotation concentrate is 12%, and the copper recovery is 86.57%, which proved that the flotation optimized process can obtain better recovery effect.