RECYCLING PROCESS FOR STEEL WORKS COARSE SLUDGE OR DUSTS USING GRAVIMETRIC CONCENTRATION

摘要

The present invention concerns a recycling process of steel works coarse sludge or dust (1) from electric or LD steel works, or industrial or metallurgical wastes which are treated by a gravimetric concentration of metallic iron or iron oxides in spiral separators (11, 13), with the possible application of ultrasound (9). During the gravimetric concentration process by way of spirals (11, 13), three components are obtained: a concentrate, a middling, and a tailing. The metallic iron concentrate obtained by the present process can be used in the metallurgical industry for the production of steel and other metallurgical products.