As an example of ilmenite flotation, a gravity plant tailing containing ilmenite in a siliceous gangue with quartz, feldspar, hornblende, garnet, and mica, which assays 18% titanium dioxide, is ground to 65 mesh and floated at a pH of 3.6. The pH is adjusted using 10.7 lb of sulfuric acid per ton of feed. In addition, 3.3 pounds of sodium fluoride is used as a dispersing agent and 2.5 pounds of Pamak 4 as the collector. A 73% recovery of a concentrate assaying 47% TiO2 is obtained.
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