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Flotation of Pyrite from Coal.
NTIS: PB 208 015 :7 pages
A two-stage froth flotation technique was developed in the laratory to separate fine-size pyrite from coal. The process consists of the initial flotation of a 15-percent solids coal slurry with a minimum of frother; the coarse, free pyrite and other refuse are removed in the tailings. The froth product from this first stage is then repulped and treated with a coal depressant, a pyrite promoter, and a frother to float the remaining fine-size pyrite or pyrite attached to coal particles. With the two-stage process, the pyrite sulfur content of a Lower Freeport bed coal sample was reduced from 1.78 percent to 0.75 percent in the first stage, and from 0.75 percent to 0.27 percent in the second stage with good clean coal recovery.
NTIS Accession No.
NTIS: PB 208 015
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division