Excessively fine grinding may lead to higher chromite recoveries, which is known to ... and frother dosage resulted in a non-selective increase in solids recovery owing to en- ... well as the water recovery to the concentrate [10]. A further problem when considering fine particle flotation is that the large specific surface area of fine ...

To increase the selectivity of Mouat ore to amine flotation of chromite, a selective olivine depressant must be found. Flotation of Chromite Gravity Concentrate. The amine flotation method was applied to chromite gravity concentrates prepared from Benbow-2 ore by a combined Humphrey's spiral and table separation technique. The …

Therefore, it can be proposed that the surface dissolution of pyrochlore can be considered, because this method can remove or decrease the common ions from the surface of pyrochlore and associated gangue minerals, leading to the successful selective flotation. 3.2.4. Chromite. Chromite (Mg, Fe +2) (Cr, Al, Fe +3) 2 O 4 has a different ...

Flotation of chromite and serpentine G.P. Gallios ... Selective flocculation is the aggregation of particles of a desired material from a mixture of materials; the main mech-

Flotation, selective flocculation, as well as magnetic carrier separation studies have also been carried out for different chromite ores to separate chromite from the gangue minerals [32][33][34 ...

The flotation of chromite from "slime fraction" of the gravity circuit of Kemi concentrator, Finland was studied. The main gangue minerals are chlorite, tremolite and talc. ... This suggest the selective separation of chromite at pH below 3.2 by using fatty acid based anionic collectors. The flotation experiments confirmed that increasing ...

However, very limited works were carried out for enrichment of ultrafine chromite ore by selective flocculation [25], [26]. Akdemir and Hicydmaz [25] studied the applicability of selective shear flocculation to synthetic mixture of chromite–serpentine mixture having grade of 29% chromite in 2 g scale. They had added sodium oleate to …

The results of micro-flotation tests proved that HA was an efficient and selective sphalerite depressant, which could depress sphalerite but hardly influence the flotation of galena to achieve ...

The objective of current work is to study the effect of pH, collector concentration, type and concentration of modifiers on the flotation behaviour of …

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.

The selective and bulk flotation processes are recently being used for the beneficiation of polymetallic sulfide ores [4]. ... explained a flotation technique for removing chromite and ilmenite ...

By this work, selective flotation of various chromite ores were studied to determine some of the features of flotation. Different chromite ores from South Africa were made flotation using the anionic collector, A825 (petroleum sulfonate), after conditioning with H 2SO 4 at low pH values in the range of 1 and 3.

PDF | On Jul 26, 2020, Onur Guven and others published Effect of particle shape properties on selective separation of chromite from serpentine by flotation | Find, read and cite all the research ...

Selective shear flocculation of chromite from chromite-serpentine mixtures - ScienceDirect Article preview Abstract References (13) Cited by (11) Colloids and …

the Merensky and Platreef flotation concentrates are similar and are amenable to conventional PGM smelting furnaces [23, 15]. Their compositions are typical of high quantities of sulphidic minerals and lower chromite content. In contrast, UG-2 concentrates are typically characterised by lower sulphide and higher chromite content.

High molecular weight depressants appeared to be relatively more selective towards hydrophilic gangue minerals such as pyroxene and feldspar at starvation dosages in batch flotation experiments. ... (2014) An investigation into the role of froth phase in controlling chromite in the flotation of UG2 ore using laboratory column flotation cell ...

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.

Selective flocculation process can be one alternative method for upgrading the ultrafine chromite (< 37 µm). Mineralogical analysis reveals that ultrafine chromite …

DOI: 10.1016/J.SEPPUR.2006.12.015 Corpus ID: 96783095; Flotation of chromite and serpentine @article{Gallios2007FlotationOC, title={Flotation of chromite and serpentine}, author={Georgios Gallios and Eleni A. Deliyanni and Effrosyni Peleka and Kostas A. Matis}, journal={Separation and Purification Technology}, year={2007}, volume={55}, …

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 ...

The flotation results using mixed collector (Armac C + KAX) [1] showed that at a fixed amount of Armac C, when the KAX concentration decreased, the recovery was slightly reduced, but it enhanced the Zn grade. The best result has been reached in 8:1 (Armac C; KAX) ratio at pH 11 with 64% recovery and 31% zinc grade.

Semantic Scholar extracted view of "Modelling and optimization of process parameters for beneficiation of ultrafine chromite particles by selective flocculation" by L. Panda et al. ... Entrainment is a process by which fine and ultrafine particles are transferred to the flotation froth from the top of the flotation pulp, and eventually ...

The flotation separation of magnesite from calcium-containing minerals has always been a difficult subject in minerals processing. This work studied the inhibition effects of carboxymethyl cellulose (CMC), sodium lignosulphonate, polyaspartic acid (PASP) and sodium silicate on flotation behaviors of magnesite, dolomite and calcite, providing …

Flotation, selective flocculation, as well as magnetic carrier separation studies have also been carried out for different chromite ores to separate chromite from the gangue minerals [32][33][34 ...

The results of the flotation tests conducted for a mixture of pure minerals indicate that is possible to obtain selective flotation of quartz in the reverse approach without a depressant. However, to reach the same recovery level as that achieved using the amine collector, it is necessary to use a higher dosage of amidoamine than etheramine.

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., (1961) and …

A good knowledge of the flotation behaviour of chromite and the establishment of conditions for its selective separation from the …

Selective flocculation is the aggregation of particles of a desired material from a mixture of materials; the main mech- anisms for aggregation are polymeric bridging by using high …

In practical operation the function of promoters may be considered two-fold: namely, to collect and select. Certain of the xanthates, for instance, possess both collective and selective powers to a high degree, and it is reagents such as these that have made possible some of the more difficult separations. In bulk flotation all of the sulphide …

A novel stepped flotation technique is discussed for the treatment of carbonate-rich iron ores. The necessity of desliming to enable effective flotation is discussed in detail. Selective ...