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Pneumatic concentration of mica.

Authors
Jordan-CE; Sullivan-GV; Davis-BE
Source
Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 8457, 1980 Jan; :1-24
NIOSHTIC No.
10006897
Abstract
The Bureau of Mines is conducting research into the pneumatic recovery of coarse mica and has used this method to produce mica concentrates that contain more than 90 percent mica. This research is being carried out pursuant to the Bureau's objective to develop technology that will help maintain an adequate supply of minerals and metals to meet national economic and strategic needs. Researchers used a Bureau-designed system of crushers, screens, and zigzag air classifiers to concentrate coarse liberated mica particles from mica-bearing materials. This pneumatic system was used to concentrate four mica ores from Arizona, North Carolina, and South Dakota and three waste tailings from Alabama, Georgia, and South Dakota. Using these samples, it was demonstrated that plus 65- mesh size mica can be effectively recovered by the pneumatic method. Not only were the concentrates high in mica content; it was also demonstrated that this method can be used to recover up to 78 percent of the mica that was originally contained in the samples. Because it is a dry concentration method, the pneumatic beneficiation technique may be advantageous in areas where water resources are limited.
Keywords
Mining-industry; Mineral-processing; Minerals; Metals; Metal-mining
Publication Date
19800101
Document Type
IH; Report of Investigations
Fiscal Year
1980
NTIS Accession No.
PB81-150005
NTIS Price
A05
Identifying No.
RI-8457
NIOSH Division
TURC
Source Name
Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 8457
State
AL; AZ; GA; NC; SD
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