论文信息 - Review of hydrodynamics and gas dispersion in flotation cells on South African platinum concentrators

Review of hydrodynamics and gas dispersion in flotation cells on South African platinum concentrators

Hydrodynamic and gas dispersion parameters, obtained from industrial flotation cells on South African Platinum concentrators, are reviewed in this paper. Hydrodynamic results show that power intensities are slightly higher than those typically observed in industrial flotation cells while impeller tip speeds and Froude numbers are within the range found in industrial cells. Gas dispersion results show that air flow rates, air flow numbers and air flow velocities vary significantly from cell to cell but are within the range typically found in industrial flotation cells. Gas dispersion results also show reasonably broad variations in bubble size, gas holdup and superficial gas velocity, although bubble surface area fluxes are shown to lie within a fairly narrow range of 50-70 /s. (C) 2000 Published by Elsevier Science Ltd. AN rights reserved.

J-P. Franzidis | D. A. Deglon | D. Egya-mensah

[1] B. K. Parekh,et al. Advances in flotation technology , 1999 .

[2] H. Schubert,et al. On the hydrodynamics of flotation machines , 1978 .

[3] P. Mavros. Mixing and Hydrodynamics in Flotation Cells , 1992 .

[4] Emmanuel Manlapig,et al. Studies on impeller type, impeller speed and air flow rate in an industrial scale flotation cell. Part 3: Effect on superficial gas velocity , 1996 .

[5] Nathaniel Arbiter,et al. Development and scale-up of large flotation cells , 2000 .

[6] C. Harris,et al. The air flow number in flotation machine scale-up , 1976 .

[7] D. A. Deglon,et al. A model to relate the flotation rate constant and the bubble surface area flux in mechanical flotation cells , 1999 .

[8] Emmanuel Manlapig,et al. Studies on impeller type, impeller speed and air flow rate in an industrial scale flotation cell — Part 1: Effect on bubble size distribution , 1995 .

[9] Kai Fallenius. Turbulence in flotation cells , 1987 .

[10] J. Franzidis,et al. Studies on impeller type, impeller speed and air flow rate in an industrial scale flotation cell. Part 4: Effect of bubble surface area flux on flotation performance☆ , 1997 .

[11] Paul Mavros,et al. Innovations in flotation technology , 1992 .

[12] Emmanuel Manlapig,et al. Studies on impeller type, impeller speed and air flow rate in an industrial scale flotation cell part 2: Effect on gas holdup , 1995 .