Research On The Floatation Characteristics And Flotation Intensification Of Flake Graphite

Flake graphite materials are applied widely in the field of metallurgy, mechanism, electronics, national defence and spaceflight due to their excellent properties of physics, chemistry and mechanism. While the deficiency on the research of floatation characteristics and technics of flake graphite resulted in long technics process and low product capacity of graphite floatation. Typical flake graphite is employed as the research object in this paper, the mineralization behavior of flake graphite floatation, wetting characteristic of particle, action model between particles, surface morphology and the dispersity and reunion of floatation pulp, foam-layer stability are studied deeply by hydromechanics, surface chemistry and mineral science. The surface characteristics of flake graphite were studied using SEM, microbolometer and powder contact angle meter. The mineralization of flake graphite, the agglomeration characteristics of particles in foam layer and the floatation mineralization method of flake graphite and the regulation of foam-layer dehydration were studied by using vacuum floatation device; and the technology of ultrasonic outfield were operated to strengthen the slurry and emulsifiers in the process of graphite floatation. The results indicate that flake graphite show characteristic of forming hydrophobic groups and mineralizing as the way of gas-flocks; there are discrepancies for graphite in different floatation class or different granularity in same floatation and a agglomeration for particle happened in ore pulp; the floatation effect could be improved using ultrasonic to disperse solid, slurry, emulsifiers or ultrasonic floatation. On the basis of these results, the paper constructed a new technics of flake graphite floatation by multi-stage grinding, grade floatation and ultrasonic intensification.