Combined microflotation of fine quartz. (31st July 2015)

• Record Type: Journal Article
• Authors: Rulyov, N. N.; Tussupbayev, N. K.; Kravtchenco, O. V.
• Is Part Of: Transactions. Volume 124:Number 4(2015)
• Page Start: 217
• Page End: 223
• Publication Date: 2015-07-31
• Subjects: Microflotation -- Microbubbles -- Air in water microdispersion -- Fine quartz; Ore-dressing -- Periodicals; Metallurgy -- Periodicals; Mineral industries -- Periodicals; 622.7
• DOI: 10.1179/1743285515Y.0000000011
• Languages: English
• ISSNs: 0371-9553

Abstract

Abstract : It is already well established that the flotation efficiency of fine minerals can be significantly improved by adding a relatively small amount of microbubbles ( < 50 μm) to conventional coarse bubbles (>1 mm) normally used in flotation cells. To establish quantitative characteristics of this effect, the dependence of the flotation rate constant and recovery on microbubbles dosage was studied using fine quartz ( < 25 μm) samples in laboratory pneumomechanical and column flotation cells. It was found that, for pulp concentration in the range of 20–30 g L − 1, the flotation rate constant of the pneumomechanical flotation process is directly proportional to the microbubbles dosage. It was also found that the introduction of 0.25 L kg − 1 of microbubbles into the pulp before it is fed into the column flotation cell resulted in the recovery increasing from 77 to 89% for quartz concentration of 34 g L − 1 and from 66 to 87% for the quartz concentration of 68 g L − 1 .