In the case of collector induced flotation, six concentrates were collected at 1, 1.5, 2, 2.5, 4, and 6 min. For the other Ni–Cu sulfide ore sample from Timmins, eighth concentrates were skimmed off at 0.5, 0.5, 1, 2, 2, 2, 2 and 2 min, for a total flotation time of 12 min. Both tests were carried out at room temperature (19–21 °C).

The more typical is isomorphism Ni↔Fe and less typical is Ni↔Co and Fe↔Co, though cobalt varieties also occur occasionally. ... The scheme is based on collective flotation of all sulphides using isobutil xanthate in the experiments. We proceeded from the amount of reagents (xanthate—170 g/ton, aerofloat—120 g/ton, …

Pentlandite [(Fe,Ni)9S8] is the primary source of nickel and an important carrier of palladium and rhodium. ... Flotation of fresh nickel-copper sulphides was compared with that of mine fines ...

Polysaccharides in flotation of sulphides. Part II. Copper/lead separation with dextrin and sodium hydroxide. Author links open overlay panel N.J. Bolin a, J.S. Laskowski b. Show more. Add to Mendeley. Share. ... '~IJIlN ~NI).l'q I SK(IWSKJ COPPER/LEAD SEPARATION A~" RENSTROM AND LANGI)AI. L~ngdal and …

Wet milling in ball mills followed by flotation is the general practice employed in the beneficiation of copper sulphide ores in which the major minerals of commercial significance typically are chalcopyrite (CuFeS 2), bornite (Cu 5 FeS 4), covellite (CuS) and chalcocite (Cu 2 S). The flotation response of ground minerals can be influenced by the …

Surface oxidation has a significant influence on sulfides flotation. However, there is a little literature about the effect of surface oxidation in the flotation of mixed …

addition on flotation performance of a nickel sulphide ore. The objectives of the study were to: 1. develop an understanding of the effects of collector and depressant dosage, and its interactive effects, on flotation performance and 2. determine the effect of stage dosing collector and depressant on flotation performance.

the flotation response of sulphide minerals in the absence of collectors and under certain conditions is now well documented.lO Mildly oxidizing environments render some …

The figure shows that among the sulphides, chalcocite (Cu 2 S) flotation starts at the lowest redox potential and pyrite flotation starts at the highest redox potential while the onset flotation of the copper‑iron sulphides, bornite (Cu 5 FeS 4) and chalcopyrite (CuFeS 2), fall in between. These differences are related to the …

Overall recoveries were Cu 99.6%, Ni 98.9%, Co 96%, Pd 94.6%, Pt 96%, ... (PGE) through the selective flotation of base metal sulphides also uses saline water. Flotation operations can be found in different parts of the Bushveld Complex, e.g., Merensky reef and Platreef. The ionic concentration varies in all Merensky concentrators, ...

In this study, the feasibility of using corn dextrin as a representative of polysaccharides to depress millerite (β-NiS) in the differential Cu-Ni sulphides flotation at pH 9 and pH 12 was examined.

To elucidate the effects of particle size, grain size and mineral association on the flotation of sulphides, flotation products were first sized using a cyclosizer into three size intervals: +20, −20, +10 and −10 μm, and were then characterised using the Mineral Liberation Analyser (MLA).

The PGE sulphides dominated the population; however, if PGE sulphides are not adequately liberated, their recovery through flotation can be hindered . If the PGE sulphides are finely disseminated or locked within the gangue matrix, it becomes challenging for the flotation process to effectively separate them . In such cases, …

The second approach is the flotation of the nickel sulphides as soon as they reach an appropriate size. We believe this to be the rationale behind the use of the …

However, there is a little literature about the effect of surface oxidation in the flotation of mixed copper‑nickel sulfide (Cu Ni sulfide, mainly composed of pentlandite, chalcopyrite, pyrite and pyrrhotite). In this work, the effect of surface oxidation on the Cu Ni sulfide flotation was studied.

Minerals Engineering, Vol. 5, Nos. 3-5, pp. 381-395, 1992 0892-6875192 $5.00+0.00 Printed in Great Britain 1992 Pergamon Press pie THE ROLE OF CARBOXY METHYL CELLULOSE IN THE FLOTATION OF A NICKEL SULPHIDE TRANSITION ORE E.J. WELLHAM, L. ELBER and D.S. YAN WA School of Mines, PO Box 597, …

The presence of a nickel sulphide mineral – millerite (β-NiS) has a significant impact on the Cu/Ni flotation separation efficiency in the plant operations.

the flotation recovery of Ni, Cu and Co from a nickel-copper sulphide ore. The effect on flotation performance of various parameters such as pH, collector dosage, % solids and …

Highlights Arsenic is a significant penalty element in base metals production due to its high toxicity. No commercial method of floating enargite from copper sulphides has been developed. Surface properties, and single-mineral and selective flotation of enargite are reviewed. Industrial applications require understanding mechanisms of …

In anticipation of future demands, a comprehensive understanding of the chemical and mineralogical characteristics of nickel-bearing minerals is a prerequisite to devising effective nickel …

Impact of oxidation on the flotation of a complex Ni–Cu sulphide has been investigated using two approaches. In the first approach, the samples to be floated were allowed to oxidise before ...

The Fe:Ni ratio of the pentlandites analysed was very close to one (see Fig. 3 b). However, two electrodes indicated Fe:Ni ratio higher than 1.5, a feature of pentlandite co-existing with troilite (Harris and Nickel, 1972). The data presented thus suggest compositional variation of natural pentlandite in the flotation operations and slight ...

Nickel-copper sulphide ores in Canada are in the category of complex sulphides since they are available with large quantities of pyrrhotite which is undesirable from an environmental point of view. ... (SMBS) or sodium sulphite with respect to the type of pyrrhotite. Recovery by size data reported on the flotation of Ni-Cu sulphide ore from ...

Introduction. Wet milling in ball mills followed by flotation is the general practice employed in the beneficiation of copper sulphide ores in which the major minerals of commercial significance typically are chalcopyrite (CuFeS 2), bornite (Cu 5 FeS 4), covellite (CuS) and chalcocite (Cu 2 S). The flotation response of ground minerals can …

The CESL process has been tested on a range of nickel concentrates ranging in Ni grade from 2.1 to 20.4 wt% at bench and pilot plant scale, including concentrates high in MgO arising from the flotation …

The Ni is subsequently recovered from the leach liquor by precipitation using sodium sulfide (Na 2 S) to produce a nickel sulfide precipitate grading 45–65% Ni, which is blended with the final flotation concentrate (Fewings et al. Citation 2016).

A conceptual flowsheet of the Voisey Bay Process for Ni/Co/Cu sulphides [15] ... the Flotation tail, air and the sulphuric acid solution (Streams 1, 2 and 3, respectively) are mixed in the ...

The principal nickel mineral in nickel sulphide ores is pentlandite ((Ni,Fe) 8 S 9) while the less common nickel sulphides include millerite (NiS), violarite (Ni 2 FeS 4), polydymite (Ni 3 S 4), siegenite ((Co,Ni) 3 S 4), and heazlewoodite (Ni 3 S 2). As well, often present are nickel arsenides such as gersdorffite (NiAsS) and niccolite (NiAs).

a finely disseminated nature, most of the loss in the important role in determining the flotation of fines of . flotation of the 8SOfo -44-jlm feed is in the -Si.lm size these minerals. fraction.1 The problem of loss of finely disseminated " values during the processing of sulphides has been ~-'[MA11( ~ROP£R11£S OF FIN[S

The use of polymers in sulphide flotation was not studied extensively and consequently, there are few reliable data available to explain the adsorption mechanism of polymers on sulphides.Published ...