One of the difficulties encountered in flotation of chromite in presence of serpentine has been attributed to dissolved metal ions. the influence of metal ions, dissolved in pulp filtrate, on floatability of pure chromite and serpentine has been studied and it has been shown that mg, ca and fe ions depress chromite.
Flotation of chromite and serpentine. the flotation was also found to favour the recovery of chromite particles with high chrome to iron ratio.the experiments showedistinct abundance between the chromite surface charge and the.
Of chromite deposits. in this paper, the oatability of chromite and serpentine ne particles by sodium oleate was in vestigated indepth, aiming to separation during mineral processing, i.e. to.
Odisha state is the major reserve of the chromite ore. due to the extensive applications, highgrade chromite ore is getting depleted day by day. now it ishallenge for the industry to utilize these lowgrade ores and tailings. several attempts were taken to upgrade the lowgrade chrome ores and tailings using different gravity separation methods, magnetic.
Consequently, flotation behavior of chromite changes with oxidation. figureresents the results of flotation before and after heat treatment in the presence of oxygen. these experiments were performed with 104odium dodecyl sulfate. it is interesting to note that this sample of chromite did not respond well to flotation.
Chromite recovery of 95.1 could be separated from serpentine recovery of 3.2 whereas it could not be separated from olivine. the best chromite concentrates containing 42.1 crere obtained with6 recovery fromynthetic mixtures of chromite and serpentine under optimum test conditions, that is.
Known that otation of chromite and serpentine is very difcult, especially in oleate otation, due to similar surface properties of both minerals and to the ions such as mgeriving from.
The only important ore of chromium is chromite or chrome iron ore fecr2o4 it is found in peridotite and in serpentine rock derived from peridotite it occurs in irregular bunches in veinlike masses and often mixed with magnetite flotation method of separation of chromite sand from silica sand flotation separation of chromite.
It is wellknown 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 mgeriving from the ore and depressing the adsorption of rcoo ions on the chromite surfaceodifying agents may be used to increase selectivity.
The flotation of chromite book descriptionrocess for the production ofhromite concentrate fromhromite containing ore is provided.ulp of the ore, which is milled toarticle size appropriate for flotation, is conditioned at an acid ph of from about 1.5 to about 3.5, preferably about 2.5.
Serpentine, talc, and chlorite, three common altered phyllosilicate minerals present in pgm ores, are known to have both positively and negatively charged planes oconnor, c.t. 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.
Chromite associated minerals. classification of minerals17 mar 2017 it is found, other minerals with which it is associated in the deposit,agnetite, pyrrhotite, ilmenite, ironplatinum, and chromite may occur as.investigation of surface properties of gangue minerals inaimmassociated sulphides by froth flotation from the bushveld. igneousypical gangue.
Understanding of chromite flotation. flotation tests were also done with selective collectors instead of sodium oleate to improve the flotation results. experimental materials and methods chromite and olivine samples were purified by magnetic separation and panning, washed with triple distilled water, and ground under 200 mesh by an agat mortar.
Chromite grains was measured between 0.12 and 0.34 mm fig.d. fig. 2. chromite cr and serpentine group minerals sp observed in dunitic rocks forming sieve texture ab chromite cr grains together with pyroxene pi traces observed inside of serpentine group minerals c.
Process parameters investigated were the effect of collector concentration, the ph value, the type and concentration of various modifiers on the flotation behaviour of chromite. the conditions investigate where selective flotation from gangue minerals serpentine would be possible gallios, georgios deligiannigiannakoudaki, eleni peleka, effrosyni matis, konstantinos.
South africa is the major chromite ore supplier. chromite is weekly magnetic. its density ranges in 4.14.7gcm 3, its mohs hardness fluctuates within 5.56.5, and its color differs from black to dark brown. its major gangue minerals are talc, olivine, serpentine, and pyroxene. chromite is insoluble in weak acids such as acetic acid, and boric.
1.2.6 the effect of variables on flotation kinetics 184.108.40.206 effect of mixing 220.127.116.11 effect of air flow rate 1.2.63 effect of particle size 1.2.lotation machines 1.2.1 conventional mechanical flotation cells 1.2.2 mechanical flotation machine design 1.2.3 column flotation cell 1. 2.4 column flotation cell design 1.2.
In this paper, the floatability of chromite and serpentine fine particles by sodium oleate was investigated indepth, aiming to separation during mineral processing, i.e.
Chlorite and serpentine are common magnesiumcontaining gangue minerals in copper sulfide flotation. in this study, sodium alginate,atural hydrophilic polysaccharide, was introduced aselective depressant for these gangue minerals. microflotation tests were conducted on both single minerals and synthetic mixtures. the flotation results showed that.
Chromiteserpentine separation was performed applying the froth flotation method, in which chromite was concentrated in the concentrate and serpentine was enriched in the tailings. in preliminary tests, it was found that the modifier should be first added and the pulp conditioned, followed by the.
It was demonstrated that, when naoleate is used as collector, chromite, olivine and serpentine can be separated at ph 2.5 andor ph 5.5 when employing ethylenediamine tetraacetate edta on previously deslimed material. this approach ensures flotation concentrates withr2o3 content better than 50 withecovery of more than 75.
Separation by flotation of the gl30 olivinem4 chromite system at various contents of magnesium and silicon were observed in the chromite particles pdf flotation of chromite and serpentine pdf chromite is an important strategic mineral usually associated with other gangue minerals, mainly silicates.ood knowledge of the flotation find, read.
3.1 chrome magnetic separation process. the chrome raw ore islotation tail ore, which is mainly formed in the chromite, and the chromite is the target recovering mineral. the dissociation degree of ferrochromium ore is low, and it haseak magnetic property. first of all, magnetic separation processing to separate chromite.
The best chromite concentrates containing 42.1 cr2o3 were obtained with6 recovery fromynthetic mixtures of chromite and serpentine under optimum test conditions, that is at ph 10.5, 5.105aol, 20 gmg cmc, 0.5agnetite and 500 gmg kerosene the feed contained 27 cr2o3.
Acidic medium flotation separation of chromite from olivine and serpentine. home acidic medium flotation separation of chromite from olivine and serpentine. read more. procedure for chromite flotation rijurajfoundation.org. chemical used for chrome flotation process. it is the first process that most ores undergo after mining.
China q30 flotation chemicals for mines containing high mud talc serpentine, find details about china frother q30, high mud talc serpentine frother q30 from q30 flotation chemicals for mines containing high mud talc serpentine yampx beijing technology co., ltd.
The amount of added chromite, fromriginal olivine to 20 wt, in view to evaluating the feasibility of the targeted chromitefree olivine preparation. based on discontinuous flotation, the strategy is to simulateontinuous circuit to produce chromite withufficient purity andor to purify olivine before carbonation.
The bureau of mines, u.s. department of the interior, devisedlotation technique for upgrading chromite in chromium ores and gravity concentrates. the technique consisted of cationic flotation of chromite fromlimefree pulp acidified to ph 2.5 or lower using h2so4 modifier. flotation results showed that ore containing serpentine as the primary gangue mineral was.
The associated platinum group elements in chromite ore, such as sulfide, arsenide or sulfur arsenide, can be recovered by flotation method. the olivine and serpentine in the ore can be comprehensively recycled for use in the production of refractory materials, calcium magnesium phosphate fertilizer or diabase cast stone.
Chromite flotation could not be floated using anionic collectors below ph 6. the important phenomena like dimerization, miscellization, and precipitation are all chromite and serpentine, in particular by using the shaking table. 3. material, equipment, and procedure.
The characterisation of the recovered chromite revealed that the principal reason for chromite flotation was caused by the mineral association of chromite with hydrophobic si, mg, fe rich phases, principally altered orthopyroxene and associated.