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.
In this study, the concentration of chromite minerals by amine flotation of a chromite tailing (slime) with content 23.84% Cr2O3 from Yeşilova-Burdur (Turkey) was investigated.
The beneficiation studies of Suresh (1981) illustrate that low-grade chromite ore of 16%–25% Cr 2 O 3 of Sitampundi area of India, cannot be upgraded by using conventional physical beneficiation techniques like gravity and flotation, due to the intimate association of iron in the lattice of chromite particle. However, they have demonstrated ...
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% …
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 detailed study of chromite ore beneficiation processes reveals that the …
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 …
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 ...
Chromite is an important strategic mineral usually associated with other gangue minerals, mainly silicates. A good knowledge of the flotation behaviour of chromite and the establishment of conditions for its selective separation from the gangue minerals might help the future exploitation of chromite deposits. In this paper, the floatability of …
Meanwhile, contrary to chromite, while lower flotation recoveries were obtained . in the same grinding t ime range (0-120 sec which corresponded to 32.36-28.09% rec.), ... copper ore flotation.
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 …
Chromite is the predominant gangue mineral reported to the concentrate of PGE flotation of UG2 ore, which causes serious downstream processing problems, and it seeks a good PGE grade with less ...
Serpentines could be successfully depressed oy-~ium fluorosilicate- which counteracts the effect of dissolved metal ions. In acid circuit, p H/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.
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 ...
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 ...
DOI: 10.2174/1874123101711010001 Corpus ID: 45666605; Flotation of Chromite as Pre-Treatment of Olivine Before Carbonation for CO2 Sequestration @article{Turri2017FlotationOC, title={Flotation of Chromite as Pre-Treatment of Olivine Before Carbonation for CO2 Sequestration}, author={Laura Turri and Herv{'e} Muhr and …
The selective flotation of chromite minerals of any chromite ore have some difficulties …
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 ...
ing chromium, chromite is the only one of commercial importance as an ore of chromium. Chromite is black to brownish, sometimes yellowish red in color; it has a brown streak, is translucent to opague, has a sub- metallic lustre, and is sometimes feebly magnetic. The hardness of chromite is 5*5, its specific gravity is 4.32 to 4.60, it is brittle
Variations in the recovery of platinum group metals (PGMs) are often attributed to mineralogical and other natural ore-type variations. To increase the recovery of PGMs by the flotation process, a comprehensive understanding of gangue and valuable minerals is essential for optimising the extraction and processing of metals. Recoveries …
Flotation tests of Pandora UG-2 chromite ore using A 825 in presence of H 2SO 4 were carried out and the concentrates of about 42.5 % Cr 2O3 were obtained from calculated average head grade of 29.88 % Cr 2O3, 15.45 % SiO 2. Recovery ratio of chromite increased with increasing pH value and conditioning time. Similar
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 ...
The flotation technique was attempted for enriching the Chickay chromite ore. The assay of the feed to the flotation cell was 20.3% Cr2O3. Under optimum conditions, the chromite concentrate assayed 28.7% Cr2O3 at a recovery of 94.5%.
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.
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-forming substance, …
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 ...
This paper reviews the literature relating to the flotation of chrome spinel and presents a …
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
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 …