METHOD OF DRY ENRICHMENT OF KAOLIN Russian patent published in 2002 - IPC

FIELD: methods of dry enrichment of kaolin. SUBSTANCE: proposed method includes drying, grinding, three-stage separation, settling and dust collection. Dust-laden process air escaping from operation of settling of fine product obtained at separation stage III is partially directed for dedusting operation and partially for separation stage III and separation stage II. Recirculated flows of process air are additionally used as working air. EFFECT: increased extraction of kaolin due to reduced emission of finely-dispersed fraction into atmosphere. 1 dwg