中国矿山工程

For field production processing problems, the method of copper selective flotation-middling regrinding separation was obtained as a preferred method for Anhui high-sulfur copper ore, which based on mineralogical property analysis and optimization test of separation system conditions. The results show that, compared with the flow of copper selective flotation which used middling regrinding-returning in order, the optimized separation process could decrease the accumulation of procedural middling, improve the separation efficiency of ore, reduce the impact of floatable and fine gangue, increase the recycling ratio of copper, and improve the concentrate quality. It showed that the copper accumulation of the during middling decreased by 3% and 11% and the total copper recovery ratio increased by 0.6% and 0.2% of the Sample 1 and Sample 2, respectively, by using the middling regrinding separation than that of the middling regrinding returned sequentially under laboratory conditions. Moreover, the recovery ratio of the copper roughing flotation increased more than 5% for Sample 1, and the content of the copper in copper concentrate increased more than 3.6% for Sample 2. This work provides a reference for high efficiency separation of the complex dissemination high-sulfur copper resources.