However, especially, Na-Oleate flotation of a chromite ore containing serpentine instead of olivine is very difficult because both …
The flotation has been successfully applied to process the iron ore for the particle size (Ps) from 10 µm up to 150 µm. The presence of the slimes (Ps < 10 µm) is harmful on the reverse flotation of quartz, so they are usually prior removed by hydrocyclones.
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, …
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In this project, chromite tailings from Western Limb of the South African Bushveld Igneous Complex (BIC) was characterised with the objective of recovering fine and ultrafine chromite using wet magnetic separation process. 2. Materials and Methods. Chromite tailings ore sample was obtained from a MG chromite processing plant in the Western …
Low-grade chromite of Muslim Bagh, Balochistan, Pakisktan was beneficiated to produce chromite concen- trate by cationic flotation using disodium n-octadecyl sulfosuccinamate as collector. Effect of various parameters such as grind size, pulp density, pH, and conditioning time on the overall grade and recovery of chromite …
The experiments were designed to investigate the flotation behaviour of chromite in UG2 ore with various frothers. Five frothers with different characters were selected to create different froth structures (Table 2).The three frothers (SF6005, SF6008 and SF9325) supplied by Senmin are proprietary blend frothers and their chemical …
Chromite is one of the main gangue constituents of UG2 ore, 1177 1178 Q.I. Wesseldijk et al. making up 20 to 60% by mass of the ore. Although the main minerals targeted are the base metal sulphides; pyrrhotite, pentlandite and chalcopyrite (Liddell et al., 1986) a certain amount of chromite reports to the flotation concentrate.
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 ...
Different chromite ores from South Africa were made flotation using the anionic collector, A825 (petroleum sulfonate), after conditioning with H2SO4 at low pH values in the range of 1 and 3 ...
Introduction Chromite is a member of the spinel group and is the only economically important ore mineral of chromium. It is used extensively by the metallurgical industry as feedstock for ferroalloy production [1–4]. Chromite ore is commonly classified into different grades based on the Cr/Fe ratio as well as the Cr2 O3 content.
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
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 ...
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.
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 …
shifted to also recover chromite from the fine ( -75 µm) fractions. This paper describes the results of a series of fine chromite bench flotation tests that have been carried. out at acidic and ...
The flotation time was 10 min. For the chromite flotation, the pH was lowered to 3 with H 2 S0 4 " The same reagents in quantities of 30 g/ton of collector and 10 g/ton of frother were used. In the cleaning stage the pH was changed to 5. The cleaner concentrate contained 22.8% Crp3' representing 60.6% re-covery. The flotation conditions and the ...
Lower Chromite---mineralogy and processing 239 grades now make beneficiation of much of the ore essential, gravity concentration (Heavy Medium Separation and tabling) being used with flotation [9]. Research There has been much research activity in recent years aimed at exploiting the hitherto untapped reserves of low-grade, low …
Abstract. The recovery of chromite from the tailings streams of South African UG2 platinum concentrators adds significant financial returns to these operations. Whilst the coarser fractions are amenable to processing by physical separation, the focus is now also on the recovery of fine (typically −75 µm) chromite by flotation.
A typical product obtained by such a process, from an ore containing 25.2% Cr2O3, is a recleaner concentrate containing 41.0% Cr2O3 and 2.5% SiO2 with a chromium recovery of 77.0%. In the second technique [U.S. Pat. No. 3,473,656], chromite ore flotation is achieved with an undeslimed ore at a pH of 11.5 using a long chain fatty acid collector.
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.
Tel: +27 (0) 12 259 1649. [email protected]. Keywords: Flotation, Platinum Group Metals, Chromite, Bead milling. 1 Abstract. Recent years has seen an upsurge in the interest for …
the flotation procedure can be followed by a agnetic concentration further to remove magnetic iron compounds from the concentrate s cured by tfzlrottation to yield a still higher grad concenagitating and aerating an aqueous pulp of a comminuted chromite ore in the presence of a long-chain fatty acid, a dispersing agent, and a soluble fluoride ...
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 …
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 …
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 …
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. ... This paper describes the results of a series of physical separation, and chromite bench flotation tests that have been carried out at acidic and natural pH ...
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 …
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 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 …
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 ...
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 …
ENGLISH ABSTRACT: The Bushveld Complex of South Africa contains three of the most important platinum deposits in the world namely the Merensky Reef, the Upper Group Two (UG2) chromitite reef and the Platreef. These three ore bodies are principally beneficiated by froth flotation. During the beneficiation of chromite hosted PGE's by froth flotation, …
Improving the Quality of Ferruginous Chromite Concentrates Via Physical Separation Methods. The low chromium-to-iron ratio of chromite ores is an important issue in some chromite deposits. The value of the chromite ore is indeed dictated in the market by its iron, as well as its chromium….
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 …
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 …
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 ...
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.
Chromite (75–150 µm) from flotation of UG2 ore has been similarly examined. Statistical comparison of ToF-SIMS analysis of particles from concentrate and tails reveals no significant difference in Cu, Pb, Ni and collector (IBX and DTP) signals between these streams but surface exposure of Mg and Si is favoured in the concentrate.
