Potassium Salt Flotation from Great Salt Lake Evaporites.
Huiatt-JL; Tippin-RB; Potter-GM
Trans Soc Min Eng AIME 1975 Dec; 258:303-310
The federal Bureau of Mines and the Great Salt Lake Minerals and Chemical Corp. have developed a froth flotation process for concentrating potassium salts from Great Salt Lake solar evaporites containing about 6 percent k2o. The crude evaporites, which were predominately halite (nacl) with smaller amounts of kainite (kcl.Mgso4.2.7H2o) and schoenite (k2so4.Mgso4.6H2o), were conditioned in a saturated brine solution, thus converting nonfloatable kainite to the floatable mineral schoenite. Schoenite was then selectively floated with a medium-molecular-weight fatty acid. Continuous small-scale pilot-plant testing indicated that 80 percent of the potassium could be recovered from the crude evaporites in flotation concentrates assaying about 13 percent k2o.
Trans. Soc. Min. Eng., AIME, V. 258, December 1975, PP. 303-310