DRESSING OF SLAGS CONTAINING HIGH-QUALITY STEELS AND IRON FOR EXTRACTION OF METALS Russian patent published in 2014 - IPC C22B7/04 C21B3/04 C22B9/14 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy. Extraction of metals from slags containing steel or iron particles with 150 mm grain comprises slag dry grinding, deagglomeration, classification and sorting to get metal fraction and, at least one silicate fraction. Grinding and deagglomeration are performed in grinding mill with runner and grinding rolls rolling over grinding ply. Slag containing iron particles is pre-reduced and fed to grinding as a modified slag containing iron. Grinding and deagglomeration are performed with allowance for slag type, slag metal content, degree of merging and purity of metal and silicate fractions and particle size at working pressure at runner bowl surface. Said surface is projected relative to grinding roll mean diameter vertical surface in the range of 15-450 kN/m² and with preservation of metal particle shape.

EFFECT: efficient grinding and deagglomeration.

21 cl, 3 dwg