Effect of pulp rheology on flotation of nickel sulphide ore with fibrous gangue particles

Date

2012-10-01

Author

Genc, A. Merve
Kilickaplan, I.
Laskowski, J. S.

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Tests are carried out with suspensions of fibrous chrysotile particles and nickel sulphide ore containing chrysotile as a gangue. They corroborate published results, and indicate a very strong effect of particle shape on slurry rheology. Such suspensions exhibit time dependent properties. The flotation tests revealed that the viscosity of this system strongly affects flotation performance. At a solids concentration of 15-20% (w/w), the concentrate yield increases and the concentrate grade dramatically declines. This deterioration is observed when the Casson yield stress exceeds 1.5-2 Pa. The tests imply that the rheological properties of the investigated system are mainly determined by fibrous components. However, because of the presence of anisotropic mineral particles, the effect of particle-particle interactions cannot be separated from the effect of particle shape in this system.

Subject Keywords

Flotation, Pentlandite, Serpentinite, Chrysotile, Fibrous minerals, Fine particle flotation, Rheology

URI

https://hdl.handle.net/11511/66207

Collections

Department of Metallurgical and Materials Engineering, Article