The world supply and reserves of chromite or chrome ore (FeCr 2 O 4 ) have been dominated mainly by South Africa and the ex-USSR, which made chromite a strategic material in many
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The flotation rate parameters as regressed in Circuit A were used without modification in this setup. Nine flotation rates were used, for PGMs, chromite and gangue in the roughers, scavengers and cleaning section. The flotation cells were run at different froth depths for this test, as recorded in the published dataset.
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The reverse flotation of the iron ore with etheramine collector is significantly impacted when the iron-bearing silicates and the kaolinite are present in the silicates gangue mineral complex.
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However, modifying the operating conditions on an existing flotation plant presents an opportunity for managing ore variability when processing blends of pristine and oxidized ore, or even ...
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Eckmekci et al (2003) investigated the use of different frother types on the recovery of hydrophilic chromite in a UG2 ore. They found, not surprisingly, that an increase in froth height resulted in a decrease in chromite recovery. However, most interestingly, the batch flotation cell appeared barely able to sustain a froth at 3 cm …
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The recovery of chromite from the tailings streams of South African UG2 platinum concentrators adds significant financial returns to these operations.
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A selective froth flotation process for the treatment of chromite ores having low grade chrome spinels, Zircon, staurolite, ilmenite, magnetite, garnet, quartz, epidote, olivine and alteration products as inclusions, which comprises subjecting a pulp of such an ore to an initial blunging treatment in the presence of a soluble fluosilicate ...
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Key words:Flotation, Flocculation, Desliming, Scrubbing, Activation. an indigenous low-grade chromite ore [18]. The test work reported here was undertaken with a view to …
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Fine chromite plant tailings originating from the processing of the Middle Group (MG)-1/2 were characterized using X-ray fluorescence, X-ray diffraction, and scanning electron microscopy.
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base metal sulphides from the UG2 ore of the bushveld complex. This was achieved through running a series of test work in a Denver flotation cell at varying pH 6-11 at constant reagent dosage. The UG-2 reef is characterized by two predominant gangue phases i.e. chromite and silicate, that have significantly different physical and chemical ...
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Typically during processing, three pounds of sodium silicate, 1.0 to 3.0 pounds of tall oil, and 0.25 to 0.50 pounds of carboxymethylcellulose per ton of ore are added to the flotation cell. From an ore containing 18.13% Cr2O3 and 23.98% SiO2, a flotation concentrate was obtained containing 52.16% Cr2O3 and 3.72% SiO2 with a chromium recovery ...
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The chromite in the ore also may be recovered for further treatment and use. Chromite ore, which varies compositionally within wide limits permitted by the formula (Mg, Fe 2 +) (Cr, Al, ... The final concentrate from cleaner flotation cells 30, which contains a substantial portion of the platinum group metals in the nonmagnetics fraction, is ...
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Denver Sub-A Flotation Cells 30 PART 'THREE - Flotation Tests r:ith Tailings of Sterrett I ine Hill 33 Introduction 3? Preparation of Feed 34 ... for new deposits of chromite, the only commercial ore of the metal and toarevival of interest in known deposits of low grade ore. -4-
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After so much researches on chromite flotation it was generally concluded almost by all researchers [7] [8] [9] that it was impossible to predict the response of any chromite ore due to dissolved ...
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In the UG2 ore (Bushveld Complex, South Africa) flotation, normally more than 3% of the gangue minerals, principally chromite with talc and pyroxene, report to the concentrate diluting the PGM ...
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An investigation was carried out to determine the effects of collector concentration on the grade and recovery in the flotation of middle group 1-3 Platinum Group Metal (PGM) ore mixture.
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The US Bureau of Mines compared column flotation using either fine or coarse bubbles with conventional flotation on a Montana chromite ore. On deslimed ore, fine-bubble column flotation produced a 44.7% Cr2O3-grade rougher concentrate with 87% recovery, compared with 43.8% and 43.5% Cr2O3-grade rougher concentrates with 85% and 77% …
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AbstractThe Bureau of Mines investigated column vs conventional flotation of chromite and fluorite ores. Fine-bubble column flotation of deslimed chromite ore produced a 44.7 % Cr2O3 rougher concentrate at 87.1 % recovery, whereas conventional flotation produced a 40.4 % Cr2O3 concentrate at 85.4 % recovery. Column flotation of …
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Abstract Chromite is an important strategic mineral usually associated with other gangue minerals, mainly silicates. The selective flotation of chromite minerals of any chromite …
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One option to overcome this problem is using new flotation cells such as reactor–separator which has more probability of particle–bubble attachment. Other option for enhancing the particle–bubble attachment is increasing the particle size and forming flocs. ... Preconcentration of nickel values from lateritic chromite ore overburden ...
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The literature suggests the research effort to characterise the general flotation properties of chromite (chrome spinel with high chromium content) has been extensive and a substantial amount of data is available. However, the problem of separating a small amount of chrome spinel from a large amount of ilmenite requires a different approach to ...
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For quick results a small pneumatic flotation cell was designed, hence it was possible to treat 200-300 grams of ground ore at a time. From a series of experiments using proper …
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Commercial chromite ore beneficiation processes. Pure chromium is difficult to produce since it is readily contaminated by many other elements. Huge quantity of raw chromite ore is being mined and beneficiated in various chrome ore beneficiation plants throughout the world to cater the customized needs of various ferro alloy plants.
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In a flotation cell, the size of air bubbles decreases with increasing the frother concentration. This is due to a lowering of the interfacial (gas–liquid) ... Cyclic alcohols are used in copper ore flotation as secondary (supporting) collectors.
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It is well known that to maximise recovery, flotation cells treating UG2 ore require a higher energy input than is normal for any other ore. For this reason column cells have always performed poorly, only recovering values in the fines. They have, however, been very successful at rejecting chromite due to the deep froth bed they maintain.
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The flotation concentrate with the highest PGM recovery was leached using sulphuric acid in order to remove the base metals and further enrich it in PGMs. Extractions of 73.3% Cu, 82.9% Ni, and 8.1% Fe were achieved. Keywords: PGM extraction, oxidized ore, …
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Flotation behaviour of chromite with respect to beneficiation of UG2 ore 1179 Air was introduced into the cell as the flotation gas via a syringe needle. The gas …
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Semi-industrial tests were conducted to investigate the feasibility and efficiency of a combined column and mechanical flotation cell process for the beneficiation of Sanshandao low-grade gold ore. The results showed that the performance of the combined flotation process of the cyclonic-static microbubble flotation column …
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Flotation of chromite ore in papua new guineaddressing information gaps on prices of flotation cells mineral processing machine in south iron ore where flotation madang papua new guinea 68 read shaking table widely uses in ores ...
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Identical flotation tests were done on samples of Benbow-3 ore containing 30.2 percent Cr2O3 using H2SO4 or HCl as pH modifier. The samples were ground to 100 percent minus 100 mesh, deslimed at a 30-micrometer particle size, and floated with 0.6 pound Armac C per ton of ore. …
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The mineralogical analysis in the ore showed that the occurrence of chromite phases in the ore is very similar in all Middle group seam layers as indicated in Figure 3. The six end-member compositions that combine to form chromite are hercynite (FeAl 2 O 4), spinel (MgAl 2 O 4), Fe-chromite (FeCr 2 O 4), magnesiochromite (MgCr 2 O 4), magnetite ...
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The Froth Flotation Process is about taking advantage of the natural hydrophobicity of liberated (well ground) minerals/metals and making/playing on making them hydrophobic (water-repel) individually to carefully separate them from one another and the slurry they are in. For this purpose we use chemicals/reagents: Frothers (MIBC) is …
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After so much researches on chromite flotation it was generally concluded almost by all researchers [7][8] [9] that it was impossible to predict the response of any chromite ore due to dissolved ...
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Selective flotation of chromite from serpentine was possible with sodium oleate and FSA or EDTA as modifiers under conditions of neutral pH. Other flotation studies have focused on a variety of technologies that are suitable for the selective recovery of fine chromite, including mechanical, column, and free jet flotation.
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