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Recent advances in beneficiation of western phosphates.
Rule-AR; Kirby-DE; Dahlin-DC
Min Eng 1978 Jan; 30(1):37-40
As part of the federal effort to help maintain an adequate supply of fertilizer minerals, the Bureau of Mines is conducting research to characterize complex, low-grade western phosphate rock and to develop methods for economic recovery of phosphate. The rock ranges from soft, friable, altered phosphatic shale to hard, tightly cemented, unaltered phosphate rock. To supplement current beneficiation by sizing, a flotation procedure was devised that included depression of phosphate minerals with h2sif6 and anionic flotation of carbonate minerals, followed immediately by cationic flotation of silicate minerals. Application of the procedure to several different ores resulted in phosphate concentrates that ranged from 28 to 31 pct p2o5 in grade and from 60 to 70 pct in phosphate recovery.
OP; Journal Article
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Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division