To investigate the differences and mechanisms of the response of different scheelite collectors to temperature.The temperature response law of sodium oleate and three kinds of hydroxamic acid flotation of scheelite was systematically investigated by using single-mineral flotation tests,and the intrinsic mechanism of the influence of temperature on the performance of the collectors was revealed by the contact angle tests,surface tension measurements,rheo-logical study,turbidity tests,Zeta potential tests,and adsorption tests.The results show that with the decrease of flotation temperature,the capture capacity of all the collectors is signifi-cantly weakened,among which sodium oleate is more significantly affected by temperature.The decrease in temperature leads to an increase in the surface tension of the collector,an in-crease in the viscosity of the slurry,and a deterioration in the solubility of the reagent.The combined effect of the above factors makes the collision probability between the collector mole-cules and the ore particles decrease,and the adsorption amount of the reagent on the surface of the ore particles decreases,which ultimately leads to a decrease in the number of reagent mole-cules acting on the surface of scheelite particles,reduces the hydrophobicity of the surface of the ore particles,and seriously deteriorates the flotation effect.
low temperature flotationscheelitehydroxamic acidpowder contact angle
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