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., …
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 …
A process mineralogical study based on three texturally and mineralogically different chromite-bearing ore types at the Nkomati nickel mine was undertaken, with focus on chromite. Chromite is a by-product of the Ni-Cu-Co-PGE ore at Nkomati Nickel ... Pre-flotation of the MCHR ore was performed to assess recovery of Cr2 O3 relative to the …
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 …
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 …
Mineralogical examinations indicated that, the major minerals are chromite and serpentine .Olivine, iron oxides and talc have been identified as minor minerals. Adequate degree of liberation of chromite was obtained by grinding the ore to minus 177µm. Froth flotation was used to upgrade that particular chromite ore. Oleic acid …
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 ...
Flotation Gora Ore. Chemical analysis of the chromite mineral prompted investigation of using flotation to produce a concentrate containing 44 to 48 percent Cr2O3. The best results obtained in this …
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 …
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 physico-chemical interactions among minerals such as olivine, chromite and serpentine; the most commonly present ions in solution such as Ca and Mg; and flotation reagents such as EDTA and oleic acid were investigated. The study was conducted via release tests, electro-phoretic measurements and microflotation of …
Four different amine collectors were investigated using the 16.3- percent-Cr2O3 Benbow-1 ore. The flotation procedure was as described previously. For each test, collector dosage was 0.6 pound per ton and H2SO4 consumption was 26 pounds per ton. Rougher flotation using Armac C …
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.
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 …
The tailings typically has a grade of between 17 and 21% CrO3 and 31% SiO2, with 78% of the. chromite and 73% of the mass contained in the -38 μm fraction. With such a fine grind, it is evident ...
The beneficiation studies of Suresh et al. (1981), concludes that low grade chromite ore of 16–25% Cr 2 O 3, 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.
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.
The concentrates of about 40 % Cr2O3 and 2 % SiO2 content were produced from calculated head grade of. 30.54 % Cr2O3and 13.70 % SiO2 from the flotation of …
PGM recovery from chromite tailings - a new art or more of the same? November 2011; ... The rougher flotation kinetics of the tw o ore bodies also differ slightly with the LG or es showing a much .
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 …
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 % …
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 ...
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 …
The beneficiation studies of Suresh et al. (1981), concludes that low grade chromite ore of 16–25% Cr 2 O 3, of Sitampundi area of India, cannot be upgraded by …
Chrome ore flotation Generally, when the gravity separation and magnetic separation fail, flotation offers an alternative technique to concentrate the fine-grained and ultra-fine-grained chromite rocks and fine-grained chromite tailings which require fine grinding for liberation. But grinding will produce a large amount of ore slime.
Chromite ore scenario - India. India ranks third in the world in chromite production, and fifth in terms of ore reserves. The majority (98.6%) of the ... for coarse chromite fractions and a combination of gravity separation and flotation for fines. In India, at both the Sukinda and Boula-Nausahi sectors, chrome ore is mined by opencast ...
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 ...
ficial to upgrade the Muslim Bagh low-grade chromite ore by the flotation technique to produce chromite concentrate assaying 60.1% Cr 2 O 3 with a recovery of 82.65% using diso-dium n-octadecyl sulfosuccinamate as the collector. However, upgradation through floatation technique required desliming of the feed without which no significant grade ...
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 …
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.
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
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 ...
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 ...
DOI: 10.2174/11010001 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 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, …
Abstract. The recovery of chromite from the tailings streams of South African UG2 platinum concentrators adds significant financial returns to these operations. Whilst …