Abstract: A polymetallic sulfide ore with high-silver,low-lead and low-zinc contains silver of 76.28 g/t,lead of 0.78% and zinc of 0.69%.In order to effectively recover valuable components in the ores,the technical ideas of efficiently inhibiting zinc-sulfur and strengthening recovery of silver-lead were put forward based on systematic process mineralogy research.Finally,the technological process of differential flotation for silver and lead,bulk flotation for zinc and sulfur，separation for zinc and sulfur was determined.The suitable reagent system was determined through the condition test.Finally,silver-lead concentrate with silver grade of 4 312.2 g/t,silver recovery rate of 85.19%,lead grade of 45.28%,lead recovery rate of 88.89% was obtained through the whole process test.Meanwhile,zinc concentrate with zinc grade of 45.39% and zinc recovery rate of 79.09%,and sulfur concentrate with sulfur grade of 32.17% and sulfur recovery rate of 79.77% were obtained.The test indexes are good,which achieved better recovery of the silver and lead in the ore.Also,the zinc and sulfur are recovered comprehensively.The research could provide technical basis for the development and utilization of similar lead-zinc ores.

Key words: high silver and low lead-zinc, differential flotation for silver and lead, bulk flotation for zinc and sulfur, separation for zinc and sulfur, silver collector with high selection