11.21 Phosphate Rock Processing
20 mesh is treated by 2-stage flotation. The flotation process uses hydrophilic or hydrophobic ... (250 tons per hour [ton/hr]) of rock will discharge between 31 and 45 dry normal cubic ... High-pressure-drop scrubbers (7,500 Pa [30 in. of water]) may have collection efficiencies of 96 to 99.9 percent for PM in the size range of 1 to 10 m and ...