Abstract: Since the crushing and grinding system of Midi Plant have been upgrades and transformed，tailings capacity and iron concentrate output had increased，while the tailings enrichment and conveying system is still the original process and equipment.When the plant in the normal condition，tailings enrichment system can meet the production capacity；Ilmenite system shutdown or the thickener was malfunctioned，tailings enrichment system processing capacity can't meet the production requirements，mill capacity will be reduced in order to ensure the safe operation of the thickener；Tailings conveying system have been overstretched，has safety hazard.According to the actual production organization，production organization method by partial transforming tailings preparation and transfer system and optimization was proposed when dressing plant in normal status，ensures the enterprise to realize largest production capacity and scale.

Key words: Process transformation, Tailings concentration, Tailings conveying