Journal
CANADIAN METALLURGICAL QUARTERLY
Volume 56, Issue 1, Pages 45-57Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00084433.2016.1268771
Keywords
CFD; Froth flotation; Solid concentration; Gas holdup; Population balance
Categories
Funding
- Higher Committee for Education Development in Iraq (HCED)
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A computational fluid dynamic (CFD) model has been developed to incorporate pulp and froth zones into one model. In the present research, froth was considered as a separate phase comprised of a mixture of gas, liquid and solids. Considering the froth phase as a separate phase, allowed the incorporation of pulp and froth zones into one model by tracking the formation and destruction of the froth phase due to mass exchange between the pulp and froth. Bubble break-up and coalescence were taken into account in the pulp zone, by employing user functions, written using FORTRAN. The effect of bubble coalescence process due to film rupture was considered in the froth phase. The variation in the concentration of attached particles due to attachment and detachment processes were also taken into account. The CFD model predicted the height of froth layer, the concentration of different bubble sizes in both pulp and froth zones, and finally the multiphase flow phenomena in the slurry column. Froth height was found to increase with the increase of gas flow rate while increasing solid concentration decreased froth height.
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