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Pneumatic Beneficiation of Mica.

Authors
Sullivan-GV; Stanczyk-MH
Source
Proc 14th Int'l Miner Proc Cong on Worlwide Ind Applic of Min Proc Tech Pp V6 1-v6 19 :V6.1-v6.19
Link
NIOSHTIC No.
10006492
Abstract
The Bureau of Mines has conducted research into the pneumatic recovery of coarse mica pursuant to its objective of devising technology that will help maintain an adequate supply of minerals and metals to meet national economic and strategic needs. The pneumatic beneficiation technique may be advantageous in areas where water resources are limited. Researchers used a Bureau-designed system of crushers, screens, and zigzag air classifiers to concentrate coarse liberated mica particles from mica-bearing materials. A hammer mill, modified by removing 70 of its 80 free- swinging hammers and the crushing screen, proved effective for crushing and delaminating the mica without overgrinding. This pneumatic system was used to concentrate mica ores from Arizona, North Carolina, and South Dakota and waste tailings from Alabama, Georgia, and South Dakota. Using these samples, it was demonstrated that plus 0.21-Millimeter-size mica can be effectively recovered by the pneumatic method. Mica concentrates containing more than 90 percent mica were produced with attendant recoveries of up to 78 percent.
Publication Date
19820101
Document Type
OP;
Fiscal Year
1982
NTIS Accession No.
NTIS Price
Identifying No.
OP 84-82
NIOSH Division
TURC;
Source Name
Proc. 14th Int'l Miner. Proc. Cong. on Worlwide Ind. Applic. of Min. Proc. Tech., Pp V6.1-v6.19
State
AL; AZ; GA; IN; NC; SD;
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