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Effect of solid particles on gas holdup in flotation columns—I. Measurement

✍ Scribed by S. Banisi; J.A. Finch; A.R. Laplante; M.E. Weber

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
425 KB
Volume
50
Category
Article
ISSN
0009-2509

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✦ Synopsis

Abstract~as holdup was measured by an isolating technique in a continuously operating column (10 cm in diameter and 447 cm in height) under simulated flotation conditions. The effect on gas holdup of solid particle concentration (0-15% v/v), size (95% <53 #m, 75% >53/am) and type (hydrophilic, hydrophobic) was investigated. In all cases, the presence of solids significantly decreased the gas holdup, the effect increasing when solids concentration increased and particle size decreased.

📜 SIMILAR VOLUMES

Effect of solid particles on gas holdup
Effect of solid particles on gas holdup in flotation columns—II. Investigation of mechanisms of gas holdup reduction in presence of solids
✍ S. Banisi; J.A. Finch; A.R. Laplante; M.E. Weber 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 631 KB

Part I showed that the presence of solids decreased gas holdup under conditions typical of flotation in columns. Four mechanisms which might explain this effect are evaluated here: bubble coalescence, slurry density and viscosity changes, changes in radial gas holdup and flow profiles, and bubble wa