Gas holdup characteristics in a flotation column with different solids |
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| Authors: | Kamalendu Bhunia Gautam Kundu Dibyendu Mukherjee |
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| Affiliation: | 1. Department of Chemical Engineering, Government College of Engineering and Leather Technology, Calcutta, India;2. Department of Chemical Engineering, Indian Institute of Technology, Kharagpur, India |
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| Abstract: | This paper presents the effect of process variables on gas holdup. It was measured by volume expansion method in a continuously operating flotation column using coal and sphalerite. It was observed that addition of both solids reduced gas holdup. Increase in solid concentration and particle size reduced gas holdup. Also, increase in gas velocity and frother concentration increased the gas holdup as amount of gas increased and bubble surface property favored the formation of small bubbles. An empirical mathematical model was developed to predict gas holdup. The predicted results were in good agreement with the experimental and available published data. |
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| Keywords: | Coal column flotation frother gas holdup sphalerite model |
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