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Nickel; cobalt; pentlandite; nickel sulfides; hydrometallurgy 1. Introduction The extraction of nickel from sulfidic resources was described in Part I where it was shown that direct hydrometallurgical processing of nickel sulfide flotation concentrates has several distinct advantages over pyro-metallurgy.
This paper investigated the effect of mineral surface oxidation on the floatability of Kevitsa low-grade Ni-Cu ore. Physicochemical measurements, ethylene diamine tetra acetic acid (EDTA) extraction, and oxygen uptake experiments were carried out with slurry and recycled process water samples obtained from the Kevitsa Cu-Ni …
Nickel ore dispersion before flotation using different reagents was investigated on a bench scale to improve metallurgical recovery and selectivity. The nickel ore had a content of 0.8 pct nickel and 14.5 pct MgO. A positive linear correlation …
Sulfide ores are crushed and ground in order to liberate nickel minerals by selective flotation, in place of, or in conjunction with magnetic separators. After that, nickel concentrate (containing 6–20% Ni) can be collected. ... The study showed that even though glycine-based leach rates for nickel and cobalt are slow, no passivation was ...
Literature shows that flotation has not been successful to recover nickel from laterite ores. Nickel in laterite ores is often finely disseminated in various minerals in very fine size. Therefore, fine grinding can be useful to liberate nickel-containing particles.
Carbonation of ultramafic ore prior to flotation has been proposed as a technique to convert serpentine to magnesite and silica which can potentially prevent slime coating on pentlandite, however, this technique requires carbonation at high temperatures and high-pressure conditions which will result in addition of a separate pre-treatment unit ...
Porphyry copper deposits are important sources of copper and typically processed by flotation to produce copper concentrates. As mining areas become deeper, the amounts of impurities, such as sphalerite, can be …
In this study, the effect of purifying the nickel concentrate thickener overflow water with DAF on the metallurgical performance of nickel flotation was investigated. The target was to find out whether …
Sulfidizing Behavior of Complex Lead-Silver Ore: A Flotation Study. Yibing Zhang Jian-hua Chen. Materials Science. ... Tecflote non-ionic organic agents are investigated as potential flotation collectors for copper–nickel sulfide ores. Adsorbability of four Tecflote agents having different-structure alkyl radicals … Expand.
Abstract. Removal of heavy metal ions from wastewater is of prime importance for a clean environment and human health. Different reported methods were devoted to heavy metal ions removal from ...
Purpose The aim of this literature review is to investigate the role of the beneficiation stage in the Life Cycle Assessment (LCA) of metals and minerals with a focus on the flotation process. Methods The systematic literature search included LCA studies comprising the beneficiation stage in their system boundaries and resulted in 29 studies …
The objectives of this study are to: 1) investigate and demonstrate if sodium citrate can be used as a chelating agent to mitigate the detrimental impacts of divalent cations during the processing of ultramafic nickel ores, 2) explore the potential application of sodium citrate as an effective dispersant and depressant and 3) investigate the ...
2 days agoThe Baptiste nickel project is located in the Nechako region of central British Columbia. The site lies approximately 90km north-west of Fort St. James and is located entirely within the Decar Property claims package, which is fully owned by FPX Nickel. The Decar Property comprises 62 contiguous mineral claims encompassing an area of 247km …
As for the talc type Copper-Nickel Sulfide Ores, the talc entrained in flotation concentrate with will affect the grade of copper sulfide ore, so gum Arabic (GA) is a good depressant to ...
Nickel ore dispersion before flotation using different reagents was investigated on a bench scale to improve metallurgical recovery and selectivity. The nickel ore had a content of 0.8 pct nickel and 14.5 pct MgO. A positive linear correlation between MgO and Ni was found. Carboxy methyl cellulose, both pure and combined with …
the nickel from disseminated sulphides and provide a reliable means of nickel production for future projects. 4 Nickel Economic Study Results 4.1 Nickel Economic Study Background In 1997, a hydrometallurgical flowsheet processing nickel sulphide concentrates to metal was developed and a pilot plant successfully operated.
2.6.1 Introduction. Sulfide ore flotation is a complex electrochemical system. Electron transfer not only occurs between the sulfide minerals and flotation reagent molecules, but it also happens among different sulfide minerals. Many sulfide minerals are narrow band gap semiconductors.
The flotation tests prove that inclusion of Tecflote collectors as additives to standard flotation regime enhances efficiency of the process. Partial replacement of xanthate favors higher recovery of copper and nickel in flotation froth at lower recovery …
Abstract Tecflote non-ionic organic agents are investigated as potential flotation collectors for copper–nickel sulfide ores. Adsorbability of four Tecflote agents having different-structure alkyl radicals and different numbers of functional groups is analyzed. The efficiency of the agents toward copper- and nickel-bearing minerals is …
-DTP, and PAX in froth flotation of pentlandite ore. The collectors were dosed at molar equivalent of 80g/ton PAX. This study showed that the higher cumulative nickel grades and cumulative nickel recovery were obtained by the use of PAX and respectively. Therefore, it was not beneficial to substitute xanthates with either di-C 1
The aim of the present work was to perform copper, nickel, and platinum group metals (PGMs) recovery from low-grade copper–nickel concentrate containing pyrrhotite, pentlandite, and chalcopyrite by bioleaching in stirred tank reactors in batch mode and subsequent cyanidation. The concentrate contained (%) Fe 32.7, Cu 0.7, Ni 2.3, …
In this study, the effects of acid/ore ratio (0.1-0.6 g H2SO4/g dry ore), leaching temperature (200–240 °C) and leaching time (30–120 minutes) on the high pressure sulphuric acid leaching of a lateritic nickel ore sample having 1.37% Ni, 0.076% Co and 47.72% Fe2O3 were investigated.
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 mag-netite fines.
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 …
In this study, examination of natural pyrrhotite samples from Southern African and Canadian nickel and PGE ore deposits revealed a variety of pyrrhotite compositions in terms of iron content (Fe ...
The FLOTATION PROCESS is one of the commonest methods of extracting the valuable minerals from certain classes of ores, and it is generally more efficient as regards the recovery of the minerals than any other process applicable to the treatment of similar types of ores. The metallic contents of the minerals are recovered from the …
Nickel processing - Extraction, Refining, Alloying: The extraction of nickel from ore follows much the same route as copper, and indeed, in a number of cases, similar processes and equipment are used. The major differences in equipment are the use of higher-temperature refractories and the increased cooling required to accommodate the higher operating …
