Results 251 to 260 of about 29,037 (306)

Application of Flotation Column on Flotation of Copper Ore

Advanced Materials Research, 2013
Two flotation columns replacing traditional flotation machine and vertical agitate mill were successfully used on copper production in Yangla mine. With introducing of these advanced machines, chalcopyrite with fine dissemination size could be absolutely liberated. In addition, the technological process was further optimized.
Yi Zhang, Shu Ming Wen, Dan Liu, Qin Bo Cao   +3 more
openaire   +1 more source

Effect of column height on flotation column performance

Mining, Metallurgy & Exploration, 1988
The question is posed as to why columns typically have a collection zone 10 m high (H) by 1 m in diameter (D). Three geometry dependent factors are considered: degree of mixing, Np; volumetric bias rate, B; and volumetric gas rate, G. Increasing H:D decreased Np and B, which improves performance but decreases G, which causes the column to approach ...
J. B. Yianatos, R. Espinosa-Gomez, J. A. Finch, A. B. Laplante, G. S. Dobby   +4 more
openaire   +1 more source

Arsenopyrite enrichment by column flotation

Minerals Engineering, 1993
Abstract Arsenic-rich, gold-bearing pyrite concentrates may be further enriched in arsenic to assist subsequent Au beneficiation. Among several amines tested in refloating a local Chalkidiki pyrite concentrate, 2-coco 2-methyl ammonium chloride proved successful by raising the grade from 9% to 22%, although total solids recovery was low. The use of a
P. Mavros, K.A. Kydros, K.A. Matis
openaire   +1 more source

Selectivity in column flotation froths

International Journal of Mineral Processing, 1988
Abstract Selectivity in the froth zone of two industrial flotation columns in a Mo-cleaning circuit has been studied and modelled. Froth depth is shown to be a significant factor. Froths deeper than 1 m gave selective recovery of Mo, with upgrading of 10–15% absolute. Froths less than 50 cm showed no selectivity.
J.B. Yianatos, J.A. Finch, A.R. Laplante
openaire   +1 more source

Carrying capacity in flotation columns

Minerals Engineering, 1996
The equation proposed by Espinosa-Gomez et. al. for the carrying capacity in flotation columns is revised to give better fit to the data. Flotation columns are found to be normally operated around 60% of their maximum carrying capacities.
openaire   +1 more source

Control alternatives for flotation columns

Minerals Engineering, 1993
Abstract The optimisation of flotation column operation relies mostly on the identification of the key variables to be controlled, how accurately they can be measured and how coordinately they can be dynamically influenced. Even though substantial efforts have been made during the last years, there is still a lack of process knowledge, which ...
L.G. Bergh, J.B. Yianatos
openaire   +1 more source

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

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
openaire   +1 more source

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

Column flotation: A selected review. Part I

International Journal of Mineral Processing, 1991
Abstract This review of recent work on column flotation focuses on three aspects: mixing in the collection zone, maximum gas rates and carrying capacity. The plug flow dispersion model is shown to be adequate for fitting the residence time distribution without resort to compartment models.
G.S. Dobby, J.A. Finch
openaire   +1 more source