METHOD FOR EFFICIENTLY ENRICHING, SEPARATING AND RECYCLING CHROMIUM IN CHROMIUM-CONTAINING SLUDGE OF AN IRON AND STEEL PLANT

An efficient enrichment, separation, and recovery method for chromium in chromium-containing sludge in an iron and steel plant. The method comprises: drying and grinding raw materials, and then adding Fe2O3 powder accounting for 5.0-15.0% of the mass of a chromium-containing sludge dry material, mixing same with toner of which the amount is identical to that of a Fe2O3 substance, preparing a pellet, performing reducing roasting on the pellet in a temperature range of 900-1,200ºC, crushing the roasted product, performing ore milling on same, and controlling the ore milling particle size at a particle level of -0.074 mm and a content greater than or equal to 80.0.