日本日立选矿厂,为了处理含铜硫化铁矿石,从1955年开始就采用直接优先浮选流程(併用重选)。后来经不断改进,分选成绩逐年提高。但为了进一步提高分选指标和降低成本,经试验研究提出了旋流器重选和混合优先浮选的联合流程。从1966年10月全面投入生产至今。本流程与通常的全部硫化矿混合浮选流程不同,而是在混合浮选之前,先用旋流器 Japan’s Hitachi concentrator, in order to deal with copper-bearing sulfide ore, since 1955, the direct priority flotation process (with re-election). Later, after continuous improvement, sorting results increased year by year. However, in order to further improve the sorting index and reduce the cost, the combined process of cyclone re-election and mixed-priority flotation was proposed through experimental research. From 1966 October fully into production so far. This process is different from the usual sulphide mixed flotation process, but prior to mixing flotation, the cyclone