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Potash recovery from brines by solar evaporation and flotation.

Authors
Foot-DG Jr.; Huiatt-JL
Source
Ch 12 Salts & Brines '85 Soc Min Eng AIME NY 1985 :119-133
Link
NIOSHTIC No.
10004616
Abstract
The Bureau of Mines investigated methods of recovering potash values from process and waste brines. Laboratory pan evaporation of four chloride brines produced crude salts containing predominantly sylvite, halite, and carnallite. Six sulfate-chloride brines produced crude salts containing primarily schoenite, kainite, leonite, sylvite, carnallite, and halite. Potash grades ranged from 7.2% to 22.2% K20 and recoveries by crystallization ranged from 85% to 99%. Sylvite flotation from chloride evaporites with amine collector recovered 90% to 97% of the potash in a concentrate containing 54.3% to 60.3% K2o. Fatty acid flotation of the high sulfate evaporite recovered 78% of the sulfate minerals in a 28%-k2o concentrate. Flotation of the remaining chloride minerals with amine collector recovered 80% of the potash in a 59.7%-K2o concentrate. Solar evaporation of 10,000 gal of brine recovered 99% of the potash in a crude evaporite containing 24.5% Schoenite and 20% sylvite. Flotation in a 100-lb/h continuous flotation unit recovered over 95% of the potash in schoenite and sylvite concentrates containing 28% and 62.3% K2o, respectively.
Publication Date
19850101
Document Type
OP; Book or book chapter
Fiscal Year
1985
NTIS Accession No.
NTIS Price
Identifying No.
OP 38-85
NIOSH Division
SLRC
Source Name
Ch.12 Salts & Brines '85, Soc. Min. Eng. AIME, New York, 1985, PP. 119-133
State
NY; UT
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