· Flotation data in Fig. 5 shows Cu recovery versus Cu grade in rougher flotation for parallel tests with and without (baseline) the addition of sodium silicate . The data show that, after a continuous 8 min float, both the Cu recovery and grade are slightly higher with the silicate addition relative to the baseline test.
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· International Journal of Mineral Processing, 33 ( 1991 ) 235-241 235 Elsevier Science Publishers B.V., Amsterdam Polysaccharides in flotation of sulphides. Part II. Copper/lead separation with dextrin and sodium hydroxide N.J. Bolina and J.S. Laskowskib aBoliden
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flotation of ni-sulphides EUR-Lex (11) The Community has adopted a body of customs rules, contained in Council Regulation (EEC) No 2913/92 of 12 October 1992 establishing the Community Customs Code (3) (hereinafter the Community Customs Code) and Commission Regulation (EEC) No 2454/93 (4) implementing Regulation (EEC) No
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· A Review of t he Flotation of Copper Minerals. Tinashe O. N doroª*, Lordw ell K. Witi kaᵇ. a Departmentof MetallurgicalEngineering, University of Zimbabwe, Box MP167 Harare, Zimbabwe. b
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Flotation mechanism of sulphide melt on vapour bubbles in . 15/07/2020 During the flotation of compound drops, Ni, Cu, Au and S could be transferred from the sulphide liquid into the gas phase (Mungall et al, 2015; Le Vaillant et al, 2017) Although the impact of
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· The use of reagents during grinding has beneficial effects on flotation grade and recovery of metal sulphides. Acknowledgement Financial support from the Centre for Advanced Mining and Metallurgy (CAMM), Luleå University of Technology , Sweden, established under Swedish Strategic Research Initiative programme and
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Water in Sulphides Processing and Flotation selectivity. Presented at 25th International Mineral Processing Congress-IMPC 2010; Brisbane, Australia, 6-10 September 2010, pp. 4079-4088 (peer-reviewed) 4. Fatai K Ikumapayi, Jan-Eric Sundkvist, Nils-Johan
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· Since the bulk of the flotoactive sulphides is extracted as the result of between-bath flotation, during basic flotation pyrrhotite and talc are mostly extracted, 78% and 83% of each, respectively. As aggregates with pyrrhotite, a small part of pentlandite and chalcopyrite and a significant part of magnetite pass to the basic flotation concentrate.
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:Nickel Sulfide FlotationNickel Leaching · Studies of the effect of pentlandite crystallochemical features on its flotation properties have shown that the easiest to float is nickel-enriched pentladite,
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· Effect of combined collector dosage on the recovery and grade of Ni in batch flotation tests Microphotographs of concentrate suspension from batch flotation tests Figures-available via
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· Abstract. 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
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:Publish Year:2004The direct hydrometallurgical processing of nickel sulfide flotation concentrates can address many of the shortcomings of the pyrometallurgical route, which has formed the
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semiconducting sulphides in terms of kinetics of the reagent adsorption, adsorption isotherms, kinetic of the formation of dithiophosphatogen and dixanthogen (the species
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· In this study, the flotation behaviors of gold and gold-associated sulfide minerals (pyrite and sphalerite) in a polymetallic sulfide gold ore were investigated using flotation kinetics parameters. It was found that high gold recovery (>90%) can be achieved by the selective flotation of pyrite and sphalerite.
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· 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. 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
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· Currently, in-depth and comprehensive studies of native starch and its derivatives to improve selective flotation of carbonaceous copper sulphides are scarce in the open literature. Though starch is non-toxic, environmentally benign and a sustainable flotation reagent, several constraints including its complex macromolecular structure
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:Nickel Sulfide FlotationNickel Leaching · Flotation studies conducted on 60 g samples showed that the sulphides responded to flotation with maximum grades of up to 6–7 wt.% nickel being achieved.
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Flotation studies conducted on 60 g samples showed that the sulphides responded to flotation with maximum grades of up to 6–7 wt.% nickel being achieved. Recoveries were approximately 50% on a sulphide basis and it
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· Reports on the use of polysaccharides in the differential flotation of sulphides are scarce and have not led to the development of the consistent theory that could explain their mode of adsorption. The known facts about adsorption of dextrin onto a number of minerals are summarized to provide evidence for the chemical mechanism of
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· The results demonstrated that mild steel rods produced a higher recovery of Cu, Ni, and pyrrhotite, meanwhile a higher Fe amounts extracted by EDTA and a lower Do level than stainless steel rods. The effect of collector addition site was different for two kinds of medium. For mild steel rods, collector added in cell produced a higher Cu recovery.
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· 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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· Abstract. Redox potential (Eh) control can play a critical role during sulphide mineral flotation by influencing the reactions on the surface of the minerals and consequently the flotation behaviour. Such control is usually a combined function of dissolved oxygen and pH control but can also be achieved by using appropriate chemical
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:Nickel Sulfide FlotationNickel Leaching · Selective flotation of ultrafine nickel sulphide from serpentine in saline water by pluronic triblock copolymer. September 2012. Conference: XXVI International Mineral Processing Congress-IMPC
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DOI: 10.1016/J.MINENG.2021.107139 Corpus ID: 238685155 Selective depression of millerite (β-NiS) by polysaccharides in alkaline solutions in Cu-Ni sulphides flotation separation During the flotation of metal sulfide minerals,
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The fundamental aspects of the flotation of sulphide minerals both in the absence and presence of thiol collectors are discussed in relation to their crystal structure, surface chemistry and electrochemical characteristics. Since the electrochemistry of the sulphide mineral/aqueous solution interface and of various sulphide mineral/aqueous thio
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In this paper, the flotation behaviour of nickel-copper ores processed in the Sudbury area is discusse~ with emphasis on the effect of oxidation on individual minerals, pnmarily pyrrhOlite. In general, moderate oxidation of a freshly ground ore promotes the flotability of all principal sulphides in the ore leading to a bulk flotation concentrate.
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:Sulphide Flotation ProcessLime Sulfur FunctionLime For Ph Control · The majority of the published studies on atmospheric leaching of nickel sulfide flotation concentrates have focused on leaching in chloride media due to the
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Flotation studies conducted on 60 g samples showed that the sulphides responded to flotation with maximum grades of up to 6–7 wt.% nickel being achieved. Recoveries were approximately 50% on a sulphide basis and it was determined that the low nickel grades were due to the entrainment of magnetite fines. Ó 2013 Elsevier Ltd.
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· 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. Both the
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· Sulphide Ni–Cu deposits occur typically in mafic and ultramafic igneous rocks and intrusions. The occurrence of minerals affects the separation efficiency of the sulphides. Coarse grained ores are often relatively easy to process, but some ores have altered in metamorphosis. Disseminated secondary minerals often require fine grinding
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