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Superconcentration of Commercial Magnetic Taconite Concentrates by Cationic Flotation.

Authors
Veith-DL
Source
NTIS: PB 231 278 :12 pages
Link
NIOSHTIC No.
10009204
Abstract
Caustic scrubbing followed by silica flotation with cationic ether primary amine proved effective in upgrading commercial magnetic concentrates to supergrade products containing 2 percent sio2 or less. Samples representing 41 million long tons per year of commercial magnetic concentrates from the Lake Superior region were tested by the Bureau of Mines. Bench-scale and pilot plant research indicated an estimated potential of 32 million long tons per year of superconcentrates to be available. Two pilot plant investigations yielded superconcentrates containing 1.1 and 1.9 percent sio2 that were derived from commerical concentrates containing 7.0 and 4.2 percent sio2, respectively. Corresponding iron recoveries were 90 and 93 percent at reagent costs of just over 33 cents per long ton of superconcentrates produced. Additional sources evaluated on a bench scale resulted in iron recoveries of 72 to 95 percent in products containing 1.7 to 2.0 percent sio2. Although reagent cost ranged up to 60 cents per long ton of superconcentrate, it is probable that these costs would be reduced in plant applications where benefits are derived from material and reagent recycle.
Publication Date
19740101
Document Type
IH; Report of Investigations
Fiscal Year
1974
NTIS Accession No.
PB-231278
NTIS Price
A03
Identifying No.
RI 7852
NIOSH Division
TCRC;
Source Name
NTIS: PB 231 278
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