mineral processing technology and mineral processing equipment

In mineral processing plant ,a number of organic and inorganic reagents are used in flotation and auxiliary processes to achieve separation, including collectors, frothers, extenders, activators, depressants, deactivators, flocculants, and dispersants. Collectors, frothers, and extenders are surfactants added to impart hydrophobicity to the minerals and to make selective adsorption of the collector possible or to eliminate interference to flotation by various dissolved or colloidal species. We discuss Frothers, Extenders,and Activators this article. Frothers The bubbles that rise to the top of the flotation cell must not break until they are skimmed off to collect the floated particles. To produce the desired stability of the froth that forms in the cell, nonionic surfactants such as monohydroxylated cresols are usually added unless the collector itself can act as a frother. When long-chained collectors such as oleic acid are used, they will adsorb also at the bubble surface in...