Abstract:In order to reduce the production cost and increase the economic benefits of a low-grade silver-lead-zinc polymetallic ore in Henan Province, intelligent pre-selection test, process flow and parameter optimization test were carried out on the basis of detailed process mineralogy analysis.Intelligent preselection test, process flow and parameter optimization test were carried out.The test results show that the appropriate size range of intelligent preselection is 15~50 mm, discarding rate is 25.03% and the grades of Pb, Zn and Ag are increased to 1.07%, 1.15% and 202.4 g/t,improved respectively 25.88%, 17.35% and 15.08%；Lead and zinc are recovered by the flotation process of recovery lead and zinc in turn,silver is enriched in lead and zinc concentrates, the process flow of lead flotation operation is "one coarse, three fine and one sweep",the zinc flotation process is "one coarse, two fine and one sweep",finally, we can obtain that silver lead concentrate with the grade and recovery of Ag are 6863.8g/t and 56.21%,the grade and recovery of Pb are 52.64% and 87.52%, zinc concentrate with the grade and recovery of Ag are 1496.8 g/t and 11.50%,the grade and recovery of Zn are 45.28% and 65.20%. In addition, it has been proved that the self-developed new collector XYS-1 has good applicability for this ore. This study provides a new idea for the development and utilization of low-grade silver-lead-zinc polymetallic ore.