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In this study, selective shear flocculation of celestite with Aero 845 as anionic surfactant from the mixtures of celestite and calcite was investigated using sodium silicate, sodium phosphate and sodium polyphosphate as inorganic dispersants. The effects of pH and dispersant concentration on the selective flocculation of celestite mineral were studied. Experiments carried out with sodium silicate at optimum conditions yielded a concentrate, which is flocculated material, assaying 82.5\% SrSO4 with a recovery 79\%...