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domestic chromite ores has been feasible only under the abnormal economic conditions set up by international war. Under such con ditions with import supplies cut off there …
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This report describes an investigation by the Bureau of Mines of flotation techniques for the recovery of chromite from fine-grained disseminated ores. Reported work on the concentration of chromiferous …
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The selective flotation of chromite minerals of any chromite ore have some difficulties due to dissolved cations from gangue minerals. ... bench flotation tests for the ore sample fromYunnan Mine ...
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1. Introduction. The flotation processes performed in the main iron ore beneficiation plants located in the Iron Quadrangle region (Brazil) consist of flotation of natural fine particles (below 0.15 mm, without grinding) or flotation of all the material after grinding using ball mills (run of mine).
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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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However, especially, Na-Oleate flotation of a chromite ore containing serpentine instead of olivine is very difficult because both minerals exhibit almost similar surface properties with chromite ...
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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 … Expand
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It is generally considered that chromite is naturally hydrophilic and only reports to the concentrate by entrainment. However, it is possible that, under certain conditions, the chromite can be activated by the typical reagent suite used in the flotation of UG2 ore, rendering it hydrophobic and amenable to true flotation.
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The beneficiation studies of Suresh et al. (1981), concludes that low grade chromite ore of 16–25% Cr2O3, of Sitampundi area of India, cannot be upgraded by using tabling and flotation techniques, to meet the metallurgical grade due to the intimate association of iron in the lattice of chromite.
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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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The Flotation behaviour of chromite with respect to the beneficiation of UG2 ore Minerals Engineering, 12 ( 10 ) ( 1999 ), pp. 1177 - 1184 View PDF View article View in Scopus Google Scholar
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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. Many of the strategic minerals are inputs into products in fast-changing markets. ... Column flotation of chromite and fluorite ores. Canadian …
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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 ...
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It is well-known that flotation of chromite and serpentine is very difficult, especially in oleate flotation, due to similar surface properties of both minerals and to the ions such as Mg 2+ deriving from the ore and depressing the adsorption of RCOO − ions on the chromite surface [5]. Modifying agents may be used to increase selectivity.
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It should be added that segregation of laterite ores prior the flotation process has shown some improvement in upgrading nickel. The segregation process relies on the addition of calcium chloride or sodium chloride and carbon allowing the formation of nickel and iron chlorides at temperatures between 900 and 1150 °C. Iwasaki et al., …
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Adequate degree of liberation of chromitewas obtained by grinding the ore to minus 180μm.Froth flotation was used to upgrade this chromite ore. ... Theseinclude the collector and depressant dosages, pulp pH, and conditioningtime. From an ore feed grading 20.27% Cr2O3, a chromite concentrateof 28.71% Cr2O3 with recovery of 94.54 % …
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chromite occurs within the Bushveld Igneous Complex (BIC) and is considered as stratiform chromite [1]. The BIC holds three quarters of the world's viable chromite ore deposits [2], and has an aerial 2extent of 65000 km with thickness of about 7 to 8 km [3]. The BIC consist of western, eastern and the northern limbs.
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In this paper, the floatability of chromite and serpentine fine particles by sodium oleate was investigated in-depth, aiming to separation during mineral processing, i.e. to float chromite from...
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The objective of flotation studies was to improve the overall chromite recovery by flotation of chromite in the slimes from the gravity concentration circuit. Smith showed that an ore containing serpentine as the primary gangue mineral was amenable to concentration by flotation using a cationic collector with the pH modified to below 2.5 …
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An investigation into the role of froth phase in controlling chromite in the flotation of UG2 ore using laboratory column flotation cell. Miner. Eng. 2013, 55, 125–131. [Google Scholar] Hay, M.P. A case study of optimizing UG2 flotation performance. Part 2: Modelling improved PGM recovery and Cr2O3 rejection at Northam's UG2 concentrator.
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Chromium ore deposits can vary in size and grade, with some deposits containing high-grade chromite ore suitable for direct use in metallurgical processes, while others may require beneficiation to increase the chromite content. ... and flotation. These methods are used to separate chromite from other minerals and gangue, and to …
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The rougher flotation kinetics of the tw o ore bodies also differ slightly with the LG or es showing a much faster and higher rougher recovery compared to MG ores. Figure3: Rate kinetics for ...
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Flotation concentrates derived from processing UG-2 ore are typically characterized by high chrome contents (>3 wt.%) which are not amenable to conventional PGM smelters.
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Chromite tailings ore sample was obtained from a MG chromite processing plant in the Western Limb of the Bushveld Igneous Complex (BIC), South Africa. Characterisation studies were carried out to quantify the different mineral phases, their liberation and association with each other [7]. Chemical composition of different sizes of the feed ...
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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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Hallimond tube flotation studies on chromite ore gangue minerals were performed. The particular minerals studied were olivine, diopside and hedenbergite. The …
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DOI: 10.1016/J.MINENG.2003.08.001 Corpus ID: 95546178; Effects of frother type and froth height on the flotation behaviour of chromite in UG2 ore @article{Ekmekci2003EffectsOF, title={Effects of frother type and froth height on the flotation behaviour of chromite in UG2 ore}, author={Zafir Ekmekci and Dee Bradshaw …
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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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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 …
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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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