The flotation process . l ore, which contains anotable proportion of carbonates, hence the addition of acid proveda help, by generating gas, not only in the Potter and Delpratprocesses, but in others also, namely, those using oil. One ingredient,however, has gained progressively in importance: air. Other gaseshave had their day, some generated chemically, others electrolytically. 6Notes on the Elmore Concentration Process. By Charles M. Inst. M. & M., London. Vol. VIII, 1899-1900, page 382. iMining and Scientific Press, July 24, 1915, page 124. See page 94 ofthis book. 152 THE FL
The flotation process . l ore, which contains anotable proportion of carbonates, hence the addition of acid proveda help, by generating gas, not only in the Potter and Delpratprocesses, but in others also, namely, those using oil. One ingredient,however, has gained progressively in importance: air. Other gaseshave had their day, some generated chemically, others electrolytically. 6Notes on the Elmore Concentration Process. By Charles M. Inst. M. & M., London. Vol. VIII, 1899-1900, page 382. iMining and Scientific Press, July 24, 1915, page 124. See page 94 ofthis book. 152 THE FLOTATION PROCEBS but in the latest phase of the process the prime agent is air. Indeed,the good results ensuing from the lessened proportion of oil maybe due to the fact that the less the oil the greater the intensity ofagitation required to spread it throughout the pulp.^ The vigorous H. L. SULMAN, H. H. GREENWAY & A. H. HIGGINS. ORE riLED APE. 3(). 1909. 962,678. Patented June 28,
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