US4514292A Froth flotation process Patents
The froth flotation of ore and coal is significantly improved in recovery and grade of valuable minerals and coal when a depressant combination of an inorganic sulfite and the salts of certain sulfonated compounds are employed US4514292A US06/550 163 US55016383A US4514292A US 4514292 A US4514292 A US 4514292A US 55016383 A US55016383 A US 55016383A US 4514292 A