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Estimating Bubble Loading in Industrial Flotation Cells

1
Faculty of Mining & Metallurgical Engineering, Yazd University, Yazd 98195, Iran
2
GeoRessources Laboratory, University of Lorraine, 2 rue du Doyen Marcel Roubault, 54505 Vandoeuvre-lès-Nancy, France
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(4), 222; https://doi.org/10.3390/min9040222
Received: 6 March 2019 / Revised: 3 April 2019 / Accepted: 4 April 2019 / Published: 8 April 2019
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Abstract

Bubble loading is the ratio of the weight of the solid particles to the bubble’s surface, and it has an effective role in the flotation efficiency. This paper investigates bubble loading an industrial processing circuit through considering the important role of the bubble diameter in calculating bubble loading, and the effect of the aeration rate and frother dosage on the bubble diameter. The ratio of the weight of solid particles to the bubble volume was estimated to be in the range of 8 to 24 g/L. Although increasing the aeration could result in increasing the weight of the particles attached to the bubbles, the bubble loading was reduced by increasing the aeration rate due to its impact on the bubble diameter and the percentage of bubble surface coverage. For example, when the aeration rate was increased from 45 to 146 m3/h, the bubble loading decreased from 23 to 12 g/L. By increasing the frother dosage from 70 to 150 mL/min, the bubble loading increased from 16 to 19 g/L. View Full-Text
Keywords: bubble loading; aeration rate; frother dosage; bubble diameter; flotation bubble loading; aeration rate; frother dosage; bubble diameter; flotation
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Ostadrahimi, M.; Gharibi, K.; Dehghani, A.; Farrokhpay, S. Estimating Bubble Loading in Industrial Flotation Cells. Minerals 2019, 9, 222.

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