Chromite recovery from UG2 tailings by physical separation and flotation was studied. • Desliming, magnetic separation and acidic flotation (pH2.5) achieved target grades. • Results on deslimed feed at natural pH with various collectors have been promising. • Further work is underway on spiral concentrates, collector addition and froth ...
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The column flotation method was a lso inve stigated for the recovery of . ... Chromite ore is geologically associated with gangue materials which have lower density compared to pure chromite (FeO ...
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Flotation using cationic collectors. 500 gms of the fines were subjected to flotation. It was attempted to float the slimes in an alkaline pulp of pH 11 adjusted with lime, 50 g/ton of amine acetale (Armac C) and Dowfroth 200 was used as frother at a dosage of 5 g/ton. The flotation time was 10 min. For the chromite flotation, the pH was ...
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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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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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BENEFICIATION OF LANDI RAUD (MALAKAND, NWFP) CHROMITE ORE A. Hafeez, Saqib Ahmad and K. Hussain PCSIR Laboratories, Lahore-54600 ... Recovery of chromite from the fines generated during the crushing and grinding of the ore has been attempted by the flotation technique. An overall recovery of 81 % with a concentrate grade of 43.4 % …
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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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Chromite is an important strategic mineral usually associated with other gangue minerals, mainly silicates. The selective flotation of chromite minerals of any chromite ore have some difficulties due to dissolved cations from gangue minerals. By this work, selective flotation of various chromite ores were studied to determine some of the features of …
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This paper reviews the literature relating to the flotation of chrome spinel and presents a considered approach to the development of a robust flotation method to separate …
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UG2 ore from the Bushveld Complex is mined in South Africa for its Platinum Group Metal (PGM) content. Two of the main gangue minerals found in the ore are talc and chromite. The PGMs are separated from the ore by flotation. In this process unwanted minerals are also recovered. Talc is naturally hydrophobic and its flotation is depressed by
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Keywords: Chromite; Flotation; Modifier; Separation; Serpentine 1. Introduction The world supply and reserves of chromite or chrome ore (FeCr2O4) have been dominated mainly by South Africa and
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From an ore feed grading 20.27% Cr2O3, a chromite concentrate of 28.71% Cr2O3 with recovery of 94.54 % could be obtained by flotation at collector dosage of 0.300 kg /t, neutral pulp (pH 9 ...
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The main economic PGE-bearing ore bodies within the Bushveld Complex mined today are the Merensky Reef, the UG-2 chromitite, and the Platreef. ... The processing plants of Sylvania Platinum Ltd. make use of gravity separation and flotation to recover both the chromite and PGE-rich fractions. Comminution and liberation of …
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About 70% of the UG2 reef consists of the gangue mineral chromite (FeO · Cr 2 O 3).In the processing of UG2 ore by flotation for the recovery of platinum group elements (PGEs) the presence of chromite in the concentrates can cause serious downstream processing problems and a grade of less than 3% Cr 2 O 3 is sought. This …
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Pre-heat treatment of chromite ore plays a vital role in gravity separation. The optimized tabling conditions suggested by BBD are 8° tilt angle, 4 L∙min-1 water flow rate and temperature for ...
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Odisha state is the major reserve of the chromite ore. Due to the extensive applications, high-grade chromite ore is getting depleted day by day. Now it is a challenge for the industry to utilize these low-grade ores and tailings. Several attempts were taken to upgrade the low-grade chrome ores and tailings using different gravity separation …
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Chromium (Cr) ore refers to a natural mineral deposit that contains chromium in its raw form. Chromium is a chemical element with the symbol Cr and atomic number 24. It is a hard, lustrous, and corrosion-resistant metal that is widely used in various industrial applications due to its unique properties.
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Chromite is an oxide mineral that an iron chromium oxide with formula: FeCr2O4. It is belonging to the spinel group. Chromite is the most important ore of chromium. Crystals are uncommon, but when found they are octahedral. Chromite is usually massive or in the form of lenses and tabular bodies, or it may be disseminated …
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Samples of the Middle Group 1 chromite ore of the South African Bushveld complex were subjected to batch flotation tests using sodium isobutyl Xanthate (SIBX) and Senkol 433 as collectors and ...
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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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Chromite and talc are two major gangue minerals in platinum bearing UG2 ore processed from the Bushveld Complex in South Africa. During flotation, talc is effectively depressed by the addition of ...
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DOI: 10.1016/S0892-6875(99)00090-4 Corpus ID: 96710703; A new flowsheet for processing chromite fines by column flotation and the collector adsorption mechanism @article{Gney1999ANF, title={A new flowsheet for processing chromite fines by column flotation and the collector adsorption mechanism}, author={Ali G{"u}ney and G{"u}rol …
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The South African platinum industry has advanced into an era of predominantly mining and processing Upper Group Two (UG-2) ore to extract Platinum Group Metals (PGMs). Flotation concentrates derived from processing UG-2 ore are typically characterized by high chrome contents (>3 wt.%) which are not amenable to …
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651 2. EXPERIMENTAL 2.1 Materials 2.1.1Chromite Ore Sample A chromite ore sample about (250 kgs) of low grade ore was collected from Chickay mines, at the Ingassana Hills. A high grade chromite ore sample (10Kg) and a similar high grade serpentine sample were selectively collected to investigate their flotation characteristics.
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Supply of world chromite (chrome ore) has come under severe pressure over the past year driven by strong demand for ferrochrome used in ferroalloy production for making stainless steel.
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Fluxing of South African chromite ore with colemanite by M.W. Erwee, I.J. Geldenhuys, M.B. Sitefane, and M. Masipa 03BF7AEA South African chromite ores are smelted using SiO2- and CaO-containing fluxes, normally as quartz and limestone respectively. The purpose of SiO2 is to lower the melting point of the ore, while CaO is added to ensure …
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About 70% of the UG2 reef consists of the gangue mineral chromite (FeO · Cr2O3). In the processing of UG2 ore by flotation for the recovery of platinum group elements (PGEs) the presence of ...
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An Example of flotation cell capacity and circuit retention time approximation: Estimate the volume of conditioners and flotation cells required to handle 9100 dry tons of ore per 24 hours at 30% pulp solids by weight, with an ore specific gravity of 3.1. Five minutes conditioning time and 15 minutes flotation time are desired.
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Chromite is an important strategic mineral usually associated with other gangue minerals, mainly silicates. The selective flotation of chromite minerals of any chromite ore have …
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Serpentines could be successfully depressed sodium fluorosilicate which counteracts the effect of dissolved metal ions. In acid circuit pH 5.5, the amenability of silicates to flotation decreases and chromite floats readily. The suitability of the process for chromite ore beneficiation requires further pilot plant tests. Résumé
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