Results 231 to 240 of about 512,754 (288)

Bubble spargers in column flotation: Adaptation to precipitate flotation

Minerals Engineering, 2000
Abstract The limiting factor for metal-organic precipitate flotation in a column is the level of aggregate stability under the turbulence created by the rising bubbles. The hydrodynamic conditions in a 75 mm diameter pilot column were optimised by using different bubble spargers (Microcel, Flotaire, Imox) and by varying the gas flow rate into the ...
L.O. Filippov, R. Joussemet, R. Houot
openaire   +1 more source

An investigation of the flotation mechanism in the aerosol column flotation machine

Russian Journal of Non-Ferrous Metals, 2009
It is shown that the induction time decreases as the temperature decreases if there is air bubble adhesion to hydrophobic and hydrophilic particles; if there isn’t, the time decreases where hydrophobic particles stick to one another and increases in the case of adhesion of hydrophilic particles.
S. I. Evdokimov, A. M. Pan’shin
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Column flotation froths

1987
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Beneficiation of fluorspar by column flotation

Mining, Metallurgy & Exploration, 2000
The amenability of column flotation for the beneficiation of fluorspar was investigated, and the overall performance of the column flotation was compared to the performance of the existing conventional flotation cells at the plant. It was established that improved grades and recoveries could be obtained by adopting column technology.
G. Bhaskar Raju, S. Prabhakar
openaire   +1 more source

Flow characterization of a flotation column

The Canadian Journal of Chemical Engineering, 1989
AbstractThe flow characteristics of a froth flotation column have been experimentally studied using air and aqueous surfactant solutions without the presence of solids. The hold‐up behaviours of the bubbly and the froth zones of the column were linked together using the drift‐flux model.
Rajinder Pal, Jacob Masliyah
openaire   +1 more source

Dynamic model of a flotation column

Minerals Engineering, 2000
A linear multivariable model for a flotation column is derived from process analysis and experimental data. The data have been taken from a pilot-scale column (height 720 cm; diameter 5.1 cm) with all necessary instrumentation installed. The flotation column was operated in a water-air system.
M.A.M Persechini, F.G Jota, A.E.C Peres
openaire   +1 more source

Developments in the control of flotation columns

International Journal of Mineral Processing, 1988
Abstract The methods used currently for the control of flotation columns are summarised. The major deficiency of these methods is that they rely on inaccurate and indirect measurements of slurry-froth interface level and bias flowrate (the net downward flowrate of water through the froth phase).
M.H. Moys, J.A. Finch
openaire   +1 more source

Column flotation of iron ore

Minerals Engineering, 1992
Abstract Iron ore producers have come under increasing pressure to reduce the silica content of their concentrates. Many companies are considering reverse froth flotation circuits as a means of achieving the required silica levels. Column flotation is being given serious consideration for this service due to the low capital and operating cost of the ...
I.M. Flint, H.E. Wyslouzil, V.L. de Lima Andrade, D.J. Murdock   +3 more
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Semi-batch flotation column

Minerals Engineering, 2012
Abstract A compact (75 cm ht × 7 cm dia.) semi-batch type flotation column was developed for use as a convenient testing and research apparatus especially in laboratories that do not have sufficient headroom for a full-size experimental column installation.
L.P. Gu, T. Yalcin
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Automatic Control of Flotation Columns

2010
Since their first commercial application for mineral separation in the early 1980s, flotation columns have become a standard piece of equipment in mineral concentrators particularly for cleaning operations. This chapter presents and discusses the most recent advances in instrumentation and automatic control of flotation columns.
René del Villar, André Desbiens, Miguel Maldonado, Jocelyn Bouchard   +3 more
openaire   +1 more source