四川是农业大省,生产化肥用的原料硫主要靠川南硫铁矿。川南硫铁矿属二迭纪乐平煤系沉积硫铁矿床,平均地质品位不到20％,必须选矿富集后才能利用。目前川南硫铁矿山均采用重选流程,回收率较低,国家资源浪费严重,为充分利用国家资源,增加矿山经济效益,化工矿山设计研究院会同周家硫铁矿,将现有18万t/a规模选矿厂由重选改为重—浮联合流程,已通过峻工验收和鉴定,并于1991年9月5日投入生产。 Sichuan is a major agricultural province, the main raw material for fertilizer production of sulfur pyrite south of Sichuan. Chuannan pyrite belongs to the Permian Leping coal-bearing sedimentary pyrite deposit with an average geological grade of less than 20%. It must be enriched before beneficiation. At present, both southern Sichuan iron and steel mines are re-election process, the recovery rate is low, a serious waste of state resources, in order to make full use of national resources and increase the economic benefits of mines, Chemical Mining Design and Research Institute in conjunction with Zhou Jia pyrite, the existing 180,000 t / a scale ore dressing plant was re-elected to heavy - float joint process, has passed the acceptance and identification Junji, and in September 5, 1991 put into production.