我厂硫化矿系统于一九七○年七月建成投产,初期采用混合浮选流程,在抑制铋和硫的作业中造成铜的损失。后改为优先浮选铜、重选回收伴生金属的流程,铜精矿品位由8%提高到10.5%,选矿回收率由80%提高到86.4%。今年六月下旬,又改为精料入磨流程,经过七、八两个月的连续生产试验,铜的选别指标得到进一步提高,经济上也取得一定的效果。一、原矿性质简述 The sulfide ore system of our factory was put into operation in July 1970. The initial application of a mixed flotation process resulted in the loss of copper in the bismuth and sulfur suppression operations. After the change to priority flotation of copper, re-election process associated with the recovery of copper, copper concentrate grade increased from 8% to 10.5%, beneficiation recovery rate increased from 80% to 86.4%. In late June of this year, it was changed to the fine material grinding process. After seven or eight months of continuous production tests, the copper sorting index has been further improved and the economy has achieved certain results. First, a brief description of the nature of the ore