froth flotation


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froth flotation

[¦frȯth flō′tā·shən]
(engineering)
A process for recovery of particles of ore or other material, in which the particles adhere to bubbles and can be removed as part of the froth.
References in periodicals archive ?
To separate the valuable minerals from the gangue, many kinds of separation methods are developed, such as froth flotation, gravity, and electromagnetic, among which the froth flotation is the most widely used separation technique in the mineral industry.
The evaluation of the composition of the plastic mixture fractions collected after froth flotation separation was performed using two different procedures: the "oven method" and the "selective dissolution method".
In hindsight, the successful adoption of froth flotation by Britannia in 1912 was highly significant, for without the ability to produce a satisfactory concentrate by gravity, separation alone the mine would very likely have closed, and development of the deposit would have been postponed for years.
After thorough coning and quartering, each of the samples was subdivided into sub-samples for gravity separation and magnetic separation (one kg), froth flotation (one kg), and sieve analysis (500 gm) and head sample analyses (500 gm).
While the buoyancy analysis has been greatly simplified for the sake of brevity, it should be apparent that the intentional elimination of a distinct froth phase of discernable depth and the creation of a fluidized bed of solids make it possible for the HydroFloat technology to recover much larger particles than traditional froth flotation machines.
Keywords: low grade, lead-zinc ore, galena, sphalerite, beneficiation, froth flotation, grade, recovery
Some authors have attempted to study the potential of froth flotation for upgrading oil shale to produce a concentrate of the organic matter.
Commemorating that anniversary, this book/CD-ROM package details the current state of research and practice in mineral froth flotation. International contributors from various disciplines examine facets of flotation including historical aspects, fundamentals, chemistry, flotation cells, modeling and simulation, and flotation plant practice.
In the froth flotation process gangue particles are separated from the values (often mineral ores or coal) by virtue of differences in hydrophobicity; the more hydrophilic gangue resides in the interstitial liquid where it drains downwards whereas the more hydrophobic values rise with the bubbles into the concentrate stream.
High recoveries of gold and carbon were obtained in laboratory tests using froth flotation, with a high rejection of the grit.
Current treatment technologies consist primarily of flocculation, multimedia and cartridge filtering, sedimentation, froth flotation, hydrocycloning and evaporation; however, these techniques are sometimes found to be ineffective or costly when dealing with waters containing dilute concentrations of fine, suspended colloidal matter.