ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 7, Number 1
JKCSEZ 7(1)
February 20, 1963 

The fundamental investigations of surface properties of scheelite were made by electrophoretic mobility adsorption and contact angle measurements, and results have been correlated with its floatability obtained by Hallimond tube flotation test. The role of the interfacial electrical condition on the adsorption of collectors on mineral surfaces is discussed with the flotation of scheelite. From electrokinetic measurements made on scheelite, Ca++ and WO42- are identified to act as potential-determining ions, thus controlling the surface properties on this mineral. Therefore, at the fixed pH, the scheelite surface become to be less negatively charged with increasing Ca++ concentration and more negatively charged with increasing WO42- concentration in the pulp. Adsorption of collectors then depends strongly on the concentration of Ca++ or WO42- in the solution; anionic collectors are adsorbed on less negatively charged surfaces and cationic collectors on more negatively charged surfaces, which in turn defines the effective flotation range with respective collectors for this mineral.