多宝山铜业选矿二分厂浮选精细化管理与控制

黑龙江多宝山铜业二选矿分厂采用铜钼混合浮选工艺，细度管控及浮选药剂添加制度对流程稳定性及尾矿指标影响较大，特别是捕收剂及调整剂的使用需要严格把控。基于实验室不同磨矿细度下浮选闭路实验及药剂用量实验结果，制定现场调试方案。最终确定最佳入浮细度在66%以上，根据黄药用量及硫化钠用量实验确定一粗一扫黄药用量110 g/t、硫化钠用量10 g/t。通过入浮细度管控及改良药剂制度，使精矿及尾矿指标均有较大改善。尾矿指标降低0.01个百分点、精矿指标上升3个百分点、回收率上升2个百分点。

Fine management and control of flotation index

Heilongjiang Duobaoshan copper No.2 concentrator adopts the copper molybdenum mixed flotation process. The concentration and fineness control and flotation reagent addition system have a great impact on the process stability and tailings indicators. In particular, the use of collectors and regulators should be strictly controlled. Based on the results of closed-circuit flotation test and reagent dosage test under different grinding fineness in the laboratory, the on-site commissioning scheme is formulated. Finally, the optimum concentration and fineness for floating is determined to be above 66%. According to the experiment of xanthate dosage and sodium sulfide dosage, the dosage of xanthate for one roughing and one sweeping is determined to be 110g/t, and the dosage of sodium sulfide is determined to be 10g/t. By controlling the concentration and fineness of flotation and improving the reagent system, the indexes of concentrate and tailings have been greatly improved. Tailings index decreased by 0.01%, concentrate index increased by 3%, and recovery rate increased by 2%.