Study of flotation performance of kerosene after ultrasonic emulsified

The setaram calorimeter,the contact angle gauge DCAT21,the surface tension apparatus and the Leica electronic microscope were used to study the natures of emulsified kerosene and kerosene and their effects on slime. Batch flotation tests were carried out.The results show that the particle diameter of emulsified kerosene,the dispersibility in water,the wetting heat with slime,changing contact angle and decreasing gas-solution interfacial tension and so on are all better than those of kerosene.The consumption of emulsified kerosene is only one-third of that of kerosene when equivalent yields of clean coal are obtained.The flotation speed of emulsified kerosene is faster than that of kerosene,the yield of clean coal of emulsified kerosene is higher than that of kerosene by 7.38 % and the ash content of clean coal of emulsified kerosene is lower than that of kerosene by 0.98 % when equivalent amounts of the two reagents are used in the flotation process.The study shows that flotation selectivity and efficiency of emulsified kerosene are all higher than those of kerosene and the consumption of reagent is lower than that of kerosene.