THE INFLUENCE OF TEMPERATURE DURING FLOTATION OF CELESTITE AND CALCITE WITH SODIUM OLEATE AND QUEBRACHO

A study has been made on the influence of temperature during flotation of the celestite and calcite mineral species, using sodium oleate as the collector and quebracho as the depressant, for a particle size ran ging between 80/100 A.S.T.M. mesh (177/149 mu m). The experiments were conducted on pure minerals in a thermostatted Hallimond tube with wor king temperatures between 293 and 323 K. Results indicate that celesti te can be depressed during flotation with sodium oleate due to the act ion of quebracho, although when the temperature in the bath is increas ed, the depressor action is slightly inhibited, thus increasing recove ry of the mineral. The results for calcite show similar findings, alth ough with a less pronounced depressor effect due to quebracho.