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- W1548355965 abstract "The Bureau of Mines investigated energy-efficient methods for 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% K/sub 2/O, and recoveries from 84 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% K/sub 2/O. Fatty acid flotation of the high-sulfate evaporite recovered 78% of the sulfate minerals in a 27.8%-K/sub 2/O concentrate. Flotation of the chloride minerals with amine collector recovered 80% of the potash in a 59.7%-K/sub 2/O concentrate. Solar evaporation of 10,000 gal of brine recovered 99% of the potash in a crude evaporite containing 24.5% schoenite and 20 pct sylvite. Continuous flotation in a 100-lb/h process research unit recovered over 95% of the potash in schoenite and sylvite concentrates containing 28.0 and 62.3% K/sub 2/O, respectively. An economic evaluation suggested a rate of return of 3% for a new facility and 9% if the process is adapted to fit an existing plant." @default.
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- W1548355965 date "1984-01-01" @default.
- W1548355965 modified "2023-09-27" @default.
- W1548355965 title "Potash recovery from process and waste brines by solar evaporation and flotation" @default.
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