Abstract: Due to the complex symbiotic relationship of copper, lead and zinc sulfide ores from Inner Mongolian a mining company, it's very difficult to separate. In order to develop these ores, carried out dressing tests by multiple schemes. The results show that, the conventional flotation process can't separate these ores, but the process of lead gravity separation-bulk flotation of copper and zinc then flotation separation can get the lead concentrate with grade 57.20%, recovery 54.18%, copper concentrate with grade 13.35%, recovery 57.11%, rich contain of zinc material with zinc content 18.78%, recovery 41.94%. Rich contain of zinc material can be sold with high grade zinc concentrate from other concentrators.

Key words: Complex copper-lead-zinc sulfide Ore, Solid solution separation structure, Conventional flotation, Lead gravity separation-bulk flotation of copper and zinc-flotation separation of copper and zinc