Investigation of the role and interactions of a dithiophosphate
The milled slurry was transferred to a modified 3 L Leeds flotation cell, where the volume was made up using synthetic plant water to produce 35% solids.The cell was fitted with a variable speed drive and the pulp level was controlled manually. The impeller speed was set at 1200 rpm.The conditions used for this testwork are shown in Table …
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A review of the effects of the grinding environment on the flotation …
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 …
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Flotation of Nickel-Copper Sulphide Ore: Optimisation of …
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 …
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Effect of Grinding Medium Type and Collector Addition Site on Flotation
The effects of the grinding method and grinding medium on the flotation performance of sulphide minerals have been reported in many literatures. In the current investigation, grinding and floatation experiments using mild steel and stainless steel rods were performed to examine the effect of grinding medium type and collector addition site …
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Sulphidisation of oxides and oxidised sulphides and …
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 …
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Characterization of a Nickel Sulfide Concentrate …
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 …
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A conceptual flowsheet of the Voisey Bay Process for Ni/Co/Cu sulphides
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 ...
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Flotation mechanism of sulphide melt on vapour bubbles …
Sulphides and associated metals sequestrated in deep-seated, mushy cumulates may be partially transported to shallow reservoirs, leading to further concentration of sulphides into magmatic/porphyry deposits and/or breakdown of sulphides for excess sulfur/metal degassing of volcanic eruptions. ... During the …
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Fundamentals of pentlandite mineralogy and its effect on its
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 ...
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A review of the effects of the grinding environment on the flotation …
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 …
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A critical review of surface properties and selective flotation of
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 …
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Ni/Co–Cu Sulphide Ores, Key Contributors to Sustainability …
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 ...
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Full article: The Direct Leaching of Nickel Sulfide …
The primary advantages of pyrometallurgical processing of nickel sulfide flotation concentrates are that iron and sulfur are removed from the concentrate during smelting and converting with a …
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Transport of metals and sulphur in magmas by flotation of …
The implications extend to the transport and deposition of Ni-, Cu- and Pt-rich sulphides in magmatic ore deposits, where it is clearly not safe to assume that sulphide melt will always tend to ...
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Geological variations in the Merensky Reef at Bafokeng …
However, the better flotation response of Cu and Ni in the FW 1A contact and FW 3 pothole, as illustrated by higher concentrate to head grade ratios (Fig. 9 D), is due to the better liberation of sulphides in the flotation feed (Fig. 7 A) which, in turn, is due to coarser sulphide mineralisation in the high grade portion of the reefs, as seen ...
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Development and implementation of a new flowsheet for …
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 …
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The flotation of millerite — A single mineral study
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).
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The effect of non-sulphide gangue minerals on the flotation …
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).
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Oxidation of Complex Ni-Cu Sulphide Ores and its
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 ...
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Combined inhibitory effect of calcium hypochlorite and …
Flotation results showed that the combined effect of Ca(ClO) 2 and DX depressed the flotation of pyrite more strongly than that of their individual effect. An improved recovery difference of more than 60% between the galena and pyrite was achieved at pH 10 while using Ca(ClO) 2 and DX as depressant system and diethyldithiocarbamate (DDTC) as ...
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Sensitivity of pentlandite flotation in complex sulfide ores …
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).
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Studies on the surface oxidation and its role in the flotation …
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 …
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Differential flotation of chalcopyrite, pentlandite and …
A new method for the treatment of Ni-Cu sulphides ores from the Sudbury region by differential flotation is presented. The method exploits the ease of chalcopyrite floatability in complete or virtual absence of collector, but in the presence of sulphur dioxide, an effective complexing agent such as diethylenetriamine (DETA) and a frother.
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Impact of oxidation on flotation of Ni–Cu sulphide ore
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 ...
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Redox potential control during flotation of a sulphide mineral …
A major problem stemming from the existence of PGMs together with BMS is that, a loss of BMS during flotation will be accompanied by a loss of valuable minerals (PGMs) associated with the sulphides (Vermaak et al., 2004, Wiese et al., 2005, Mphela, 2010) Therefore, there is a need to investigate ways to improve the flotation …
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The Direct Leaching of Nickel Sulfide Flotation …
The Direct Leaching of Nickel Sulfide Flotation Concentrates – A Historic and State-of- the-Art Review Part III: Laboratory Investigations into Atmospheric Leach Processes ...
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Full article: The Direct Leaching of Nickel Sulfide 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).
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Flotation of mixed copper oxide and sulphide minerals with …
Sherwood Copper's Minto Mine processes a high grade copper–gold deposit in Yukon, Canada. The ore mined is from a primary copper sulphide deposit with separate additional deposits of copper oxides.In conjunction with Ausmelt Chemicals, Minto is currently investigating options to recover copper oxide and sulphide minerals using …
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Oxidation of Complex Ni-Cu Sulphide Ores and its …
Oxidation of complex nickel-copper sulphides is a serious concern in their flotation. This paper addresses this issue through a study of batch tests using stockpile samples and fresh samples oxidized in the lab.
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16. Flotation of Nickel and Nickel–Copper Ores
The extraction of nickel (Ni) from sulfide resources commences with flotation to produce a concentrate which is then smelted to produce a nickel-enriched phase called matte, and further refined to ...
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