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Flotation of Pyrite from Coal: Pilot Plant Study.
NTIS: PB 224 571 :15 pages
Pittsburgh bed and Lower Freeport bed coals were tested in the U.S. Bureau of Mines two-stage froth flotation pilot plant, which utilizes a new flotation process to remove pyritic sulfur. The process consists of a first-stage coal flotation step to remove coarse, free pyrite and other refuse in the tailings. The clean coal froth concentrate is then repulped and treated with a coal depressant, a pyrite collector, and a frother to selectively float the remaining pyrite in a second stage. Results in the pilot were excellent, comparing well with those obtained in laboratory batch tests. That is, about 70 percent of the pyrite present in the Pittsburgh bed coal and about 90 percent of the pyrite present in the Lower Freeport bed coal were removed with excellent final clean coal recoveries.
IH; Report of Investigation;
NTIS Accession No.
NTIS: PB 224 571
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division