NEW REAGENTS IN THE CELESTITE AND CALCITE FLOTATION

It has been studied the celestite and calcite flotation in Hallimond t ube using two nonionic surfactants, Ethylan ECD 1274 and Versilan EM-3 0, as collector agents. The results obtained show that both agents hav e a certain collector property for material sizes lower than 200 mesh (A.S.T.M.). The effect is concentrations and, in most cases, with pH c hange. The presence of each surfactant reduces the surface tension of the flotation bath, although for each agent concentration the pH chang e does not modify its value.