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Raw algal lipids (RALs) and their derivatives (fatty acid methyl esters; FAMEs) were investigated as biocollectors for the recovery of coal from ash-rich fine coal waste by froth flotation. Testing was done on fine coal discards from two South African sites—a high ash (50%), high sulphur (5.7%) sample and a lower ash (26%), low sulphur (0.91%) sample
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A method is described for recovering coal from a coal ore containing coal and non-combustible mineral matter which comprises the step of floating coal in a frothing aqueous medium containing an oxygen containing compound of the formula: R/sub 1/-)-R/sub 2/ wherein R/sub 1/ and R/sub 2/ are independently saturated hydrocarbyls, the oxygen containing compound being present in the medium in an amount
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2003-9-29 · Conventional froth flotation for fine coal cleaning suffers mainly from two problems: (i) a lack of selectivity for fast floating high rank coals due to the flotation of middlings and entrainment of mineral fines in the froth, and (ii) low recoveries for heavily oxidized or low rank coals due to poor adhesion between bubbles and particles
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2017-5-23 · The froth concentrates (cleaned fine coal) are filtered on a Disc Filter and the filter cake combined with either the —½”, + ½ mm. jig product or marketed separately. From an initial feed containing 20 – 25 % ash, the froth concentrate will average 8 – 12% ash and the tailings 80 – 85% ash
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The application of froth flotation in the separation of coal from its impurities in fine sizes has been studied since 1930's (Brown, 1962, Klassen andMokrousov, 1963)
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2020-5-1 · Froth flotation is an effective separation method for cleaning fine coal and recycling the residual carbon from coal ash. The difference in hydrophobicity between organic and inorganic minerals is the basic principle of froth flotation technology , , . There are two major approaches to
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Mar 15, 2020· Froth flotation isan effective separation process for fine coal upgrading, which occurs in the gas-liquid interface. According to the differences in the surface properties of coal and gangue minerals, the hydrophobic coal particles can be separated from the pulp by their attachment to the rising air bubbles that form a particle
Get Price![[pdf] determination of liberation size of iperindo-ilesha](/pic/flotation-cell/flotation-cell-77.webp)
This research determined the liberation size of Iperindo lode gold ore, Osun State, Nigeria and assessed its amenability to froth flotation technique. Fifty (50) kg crude sample of the ore was sourced, crushed, and chemically analyzedusing atomic absorption spectrometer (AAS). The crushed sample was subjected to fractional sieve size analysis using root 2 series sieve sets ranging from 500
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2006-5-15 · The U.S. Department of Energy's Office of Scientific and Technical Information
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2018-8-10 · Froth flotation is considered to be one of the effective physical cleaning technologies available to separate fine mineral particles from coal. Traditionally, the effectiveness of coal flotation has been evaluated based on yield and product ash and
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Disclosed is an improved process wherein coal particles are beneficiated by froth flotation under coal froth flotation conditions to separate the desired coal particles from remaining unwanted ash and like gangue material. The improvement of the present invention comprises conducting the froth flotation in the presence of an effective proportion of a promoter which is at least C 10 aliphatic
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The froth yield is the weight percentage of solids in the dried froth against the solids content of the initial charge of coal slurry, and the ash-in-tailings is the weight percentage of ash (mineral matter remaining after combustions) in the solids residue from the froth flotation cell, on a dry basis
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I claim: 1. In a froth flotation process wherein solid coal particles are selectively separated under coal froth flotation conditions as the froth phase from remaining solid feed ash particles as an aqueous phase in the presence of a coal particle collector and a frother, the improvement characterized by the addition of an effective proportion of a hydrophobic, non-ionic promoter comprising a
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