Pneumatic Beneficiation of Mica Ores.
Jordan-CE; Sullivan-GV; Davis-BE
Pres At Soc Min Eng AIME Ann Mtg Las Vegas Nevada, 1980 Feb; :8 pages
The Bureau of Mines, as part of its effort to maintain an adequate supply of minerals and metals to meet national economic and strategic needs, is conducting research on the pneumatic recovery of coarse mica. A system of crushers, screens, and zigzag air classifiers is used to concentrate coarse liberated mica particles from mica ore and from the waste tailings of abandoned mica operations. The plus 0.21-Mm-size mica is effectively recovered by this method. The mica concentrates produced contain over 90 pct mica. The method recovered up to 78 pct of the mica in the samples. As a dry concentration method, the pneumatic beneficiation technique may be advantageous to areas of limited water resources.
Pres. At Soc. Min. Eng., AIME, Ann. Mtg., Las Vegas, Nevada, Feb. 24- 28, 1980 SME Preprint 80-7