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Resurfacing of mineral particles to improve the selectivity of the flotation process is probably the most important and most complex function performed by modifying agents. The term “resurfacing” as used here includes both adsorption and ionic interaction of modifying agents at or near the mineral surface. To be effective, the resurfacing agent must be selectively attached to one mineral or one group of minerals in the ore. The result may then be either activation or depression of the resurfaced mineral, depending on the reaction of the collector with the resurfacing agent adsorbed. |
