Abstract: To increase the market competition and added value of products of Nanjing Yinmao Lead and Zinc Ore, company used current sulfur flotation technique equipments, product optimization upgrades were done, previous sulfur flotation flow of one time rough concentration and two times scavenging reformed to one time rough concentration and two times scavenging two times regrade, single general sulphur concentrate products developed to high sulphur concentrate plus general sulphur concentrate. Production practice indicated,under the condition of sulfur grade of milling ore could compare,effects of concentrate quality and recovery rate both increasing were obtained.

Key words: General sulphur concentrate, High sulphur concentrate, Process modification, Optimization