flotation process

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flotation process,

in mineral treatment and mining, process for concentrating the metal-bearing mineral in an oreore,
metal-bearing mineral mass that can be profitably mined. Nearly all rock deposits contain some metallic minerals, but in many cases the concentration of metal is too low to justify mining the ore.
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. Crude ore is ground to a fine powder and mixed with water, frothing reagents, and collecting reagents. When air is blown through the mixture, mineral particles cling to the bubbles, which rise to form a froth on the surface. The waste material (gangue) settles to the bottom. The froth is skimmed off, and the water and chemicals are distilled or otherwise removed, leaving a clean concentrate. The process, also called the froth-flotation process, is used for a number of minerals, especially silver.
References in periodicals archive ?
Generally, the smaller number of researchers was occupied by the researches in this domain in relation to the ones who studied physical and chemical deinking conditions or the hydrodynamic factors of the flotation process.
For instance, it is normal for there to be a period of 'grooming' ahead of the flotation process to enable the company to meet the more rigorous regulatory requirements of being a public company and so as to maximise its potential valuation on IPO eg selling non-core assets, reducing debt, strengthening accounting systems, tax planning, appointing non-executive directors and so on.
Michelle and Linda will be joined by our sedimentation and flotation process specialists Marie Belanger, Sergio Vianna and Tom Bookless.
Reagent Na2SiO3 has been eliminated from the desliming process while the flotation conditions in the carbonate flotation process have been optimized to provide sufficient carbonate mineral removal.
The flotation process comprises crushing and grinding to a grain size of less than 38 micrometres (microns), leading to de-sliming to remove particles less than 8 micrometres, then the removal of barren magnetite through magnetic separation.
NStar chief executive Andrew Mitchell said: "We hope to de-bunk any myths surrounding the flotation process and take a pragmatic look at why this may be a viable option for ambitious local businesses to consider when looking to raise equity.
The survey, by the LSE and law firm Eversheds, reveals an overall satisfaction in the flotation process, with 87 per cent of companies confident they had met their original objectives of raising funds and boosting credibility.
Tests using promoters and cleaners in the flotation process were also carried out to assess potential recovery enhancements.
The test results for the magnetic separation flotation process indicate that the total rare earth recovery in the rare earth and apatite concentrates is 89.
1996 Dti SPUR Award for the development of a novel biological flotation process used in water treatment;
Investors are continuing to cold-shoulder smaller quoted companies and businesses which are still private are baulking at the uncertain outcome of the flotation process," Mr Austin said.