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A diaspore flotation system, the role of the surfactant

Author: LiuSanJun
Tutor: OuLeMing
School: Central South University
Course: Mineral Processing Engineering
Keywords: Bauxite A diaspore Flotation Surfactants
CLC: TD923
Type: Master's thesis
Year: 2005
Downloads: 250
Quote: 3
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Abstract


Papers in a diaspore and kaolinite two minerals crystal structure, surface properties and flotation behavior relations, based on the study of four surfactants in a diaspore and kaolinite two kinds of mineral flotation system The interaction law, and through the flotation solution chemistry calculations, surface tension, contact angle and IR detection method of surfactant and mechanism of action of the mineral surface. 1 a diaspore and kaolinite crystal structure and surface properties of a diaspore crystal structure, aluminum octahedral form a double-stranded, double-stranded inter-connected with horns, chain link octahedron of edge; kaolinite stone hexagonal mesh silica tetrahedron layer and the \A diaspore surface of aluminum ion abundances of aluminum ions kaolinite abundance of 1.7 times. A diaspore surface load motor handles the surface adsorption and ionization of hydrogen ions, zeta potential with the pH of the solution increases. Electric charge kaolinite reason there are two: face is hydrogen adsorption and ionization potential with increasing pH of the solution decreased; level lattice metal ions replace negatively charged, and the pH independent. A diaspore zero electricity as pH5.5, kaolinite zero electricity as pH3.0. (2) a diaspore and kaolinite flotation system, a surfactant interaction law diaspore flotation systems, surfactants OL2, OL3, OL4 OL1 can significantly improve the performance of the flotation, a water diaspore flotation recovery increased by 12% or so. Four kinds of surface active agent - added sequentially impact effect of the surfactant, the best way to add pre-mixed or four surfactants optimum mixing ratio of 30:2:1:8; OL1 surfactant can improve the low temperature performance and resistance to hard water flotation performance. Kaolinite flotation system, the surface active agent combination - can influence the order of adding the same effect of the surfactant, the surfactant can be added to improve the recovery of kaolinite, a surfactant be added and pre-mixed together with can reduce its recovery. 3 surfactants and the mechanism of action of mineral flotation solution chemistry calculations show that, when the pH of 9, the solution with sodium oleate dimers and acid - the main form of soap, which has an important role on the flotation is acid - soaps. Between the surfactant to form mixed micelles by mixing, emulsifying solubilization of play, thus contributing to the anionic surfactant adsorption on the mineral surface. The formation of mixed micelles of sodium oleate system from changes in surface tension seen. Contact angle, potentiodynamic measurement shows, OL2, OL3, OL4 added to reduce the zeta potential of the mineral surface to promote OL1 the mineral surface, increasing the contact angle. Further infrared spectroscopy showed that the adsorption mode of the trend changes in physical adsorption to chemical adsorption. 4 mixed ore separation experiments artificial surfactant mix conducive aluminosilicate mineral flotation separation. Artificial mixed ore separation experiments

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CLC: > Industrial Technology > Mining Engineering > Beneficiation > Beneficiation processes and methods > Planktonic dressing
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