nickel flotation selectivity

The optimization controller on the separation circuit was configured to minimize the amount of nickel in the copper product and optimize the copper in the nickel product. Advanced pH controllers were implemented to ensure a desired pH control that promotes selectivity of nickel and copper at bulk flotation and separation circuits respectively.

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Highlights High temperature experiments demonstrated that selective sulphidation is feasible. Sulphides were submicron in size but could be physically upgraded. Nickel sulphides responded to flotation and grades of 6–8% were achieved. Low nickel grade was due to fine particle entrainment. Low nickel recovery was due to issues with fine particle grinding and flotation.

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The effect of thiosulfate was first weak but the flotability of pyrrhotite increased quite strongly during flotation, impairing the selectivity of flotation. The effect of the ions on the selectivity of nickel separation is illustrated in Fig. 4. As can be seen, especially calcium increased the selectivity of nickel flotation.

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flotation of copper-nickel and copper-molybdenum ores is known to have positive effects [7]. The other advantage of PTTC and OPDTC is that these reagents may be prepared and added into flotation cell as individual compounds or incorporated into modified collector solutions composed of xanthate

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The selective flotation of pentlandite from a nickel ore ... The flotation results indicated that FGM had excellent depression selectivity for talc minerals and little depression effect on copper-nickel minerals. Compared with the conventional depressant ...

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selectivity in flotation, causing loss of Ni-mineral to the tails, hence reducing the grade of concentrate and increasing transport and smelting costs as well (Edwards et al., 1980; Wellham et al., 1992; Peng and Bradshaw, 2012). The main reason for MgO-minerals degrading the flotation performance of the nickel ore is slime coating which

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Jul 12, 2016· This application claims priority from U.S. Patent Application No. 61/623,459, titled "A Method for Improving Selectivity and Recovery in the Flotation of Nickel Sulphide Ores that Contain Pyrrhotite by Exploiting the Synergy of Multiple Depressants," filed on Apr. 12, 2012, and which is incorporated herein by reference in its entirety.

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change the pH, but can also increase nickel flotation selectivity over MgO minerals (Pietrobon et al., 1997). Sodium carbonate may have an influence on both the mineral surfaces and solution chemical species. The mechanism by which sodium carbonate improves nickel flotation recovery has not been elucidated to date. In this study, the

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Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic.This is used in mineral processing, paper recycling and waste-water treatment industries. Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century.

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Batch Copper Nickel Flotation Tests. Testing of the shaft sample was conducted with sodium isopropyl xanthate collector throughout the laboratory test series. The change from isobutyl zanthate (which was used with the pit sample) to isopropyl zanthate was for convenience only and had little or no effect on the flotation results.

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This study aimed to investigate the sulphidization-flotation of nickel oxide. Sulphidization was conducted before froth flotation to convert the surface of nickel oxide to nickel sulphide.

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Optimisation of Reagent Addition during Flotation of a Nickel Sulphide ore at the Nkomati Mine Concentrator Prepared by: Riyard Kahn (783709) Supervised by: Prof Vusumuzi Sibanda 28 January 2017 A dissertation submitted to the faculty of Engineering and the Built Environment, University

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A selective or sequential flotation flowsheet of two or more products. By utilizing selective flotation, two or more minerals in an ore are separated into individual high grade products. ORE TREATED: The most common of ores treated in this manner are lead zinc, copper-zinc-iron, copper-nickel, but application may be made to other two or three mineral separations.

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Which flotation scheme used in the differential copper-lead bulk concentrate separation is generally and often dependent upon which mineral has the greater mass in the bulk concentrate. Whichever mineral constitutes the lower bulk concentrate mass will be floated away from the other mineral which is depressed for flotation selectivity reasons.

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Figure 5 Flotation selectivity in the separation of pentlandite from pyrrhotite using sulfur dioxide and diethylenetriamine with sodium isobutyl xanthate (pH+9.2, 25 g t 1 Dow froth!250). (Reprinted with permissionfrom the CanadianInstitute of Mining,

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The invention relates to ferrous metallurgy, in particular to a method for separation of copper-Nickel pantanaw on copper and Nickel concentrates, can be used also in mining and processing industries to flotation enrichment of natural minerals. The technical result is an improvement of the gas-filling of the pulp in photomachine fine gas bubbles.

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Abstract. Pyrrhotite (Po) is one of the most abundant sulfide minerals in processing industry and must be rejected in most cases. Particularly, Po rejection and its selectivity against pentlandite (Pn) have long been a challenge due to similarities in the mineral composition of the two minerals and the collectorless flotation characteristics of Po.

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Historically, selective flotation of copper from nickel sulfides has been achieved through pH modification; however, this method is rarely efficient, resulting in significant rejection of copper units to the nickel circuit. In Strategic Metallurgy's experience, this alternative method is robust, easy to control and results in improved grade ...

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1 Froth Flotation – Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a mineral/water slurry. The particles with attached air …

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A process for beneficiating a finely ground ore containing sulfide minerals of copper and nickel by selective flotation to produce a copper concentrate and a copper-nickel concentrate comprises pulping the ore with water to form a slurry, conditioning the slurry with an aqueous solution of SO 2 (H 2 SO 3 ) equivalent to from about 2 to about 4.5 pounds of SO 2 per ton of dry ore for a time ...

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Bulk flotation An efficient procedure for nickel recovery is to combine copper sulphate to activate pentlandite with guar gum to depress talc. This is the method which has been used for the flotation of nickel ores in industry and which we have termed the "standard bulk float". A selection of results for this ore is given in Table 3.

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The methodological basis of intensification of selective flotation and the development of new flotation reagents originate from the fundamental studies of Russian and foreign scientists such as, Plaksin, Chanturiya, Kakowski, Mitrofanov, Okolovich, Ryaboy, Bogdanov, Solozhenkin, Abramov, ... flotation of copper-nickel and copper-molybdenum ores ...

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Nickel processing - Nickel processing - Extraction and refining: 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 temperatures in nickel ...

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from a low-grade (~0.3% Ni) nickel sulfide ore as an alternative row material for metallurgical uses. Processing nickel sulfide minerals by flotation always presents the challenge of obtaining appropriate selectivity between nickel sulfide and other sulfides, such as pyrrhotite, pyrite, and chalcopyrite. Other

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Mineralogy is the driving force behind flotation performance. A flotation batch and rate test measures this as mass pull recovery and concentrate grade. The real data from a rate test can be processed to determine the flotation kinetics of metal, mineral and gangue. What we cover here is what are kinetics and what do they mean. Special attention is paid to the definition of floatable gangue.

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efficiency of copper and nickel from the flotation with high preconcentrate s-sure oxidative leaching (HPOL). A comparison was made between the leaching efficiencies of copper and nickel from flotation concentrates and mine tailing. Keywords Mine Tailing, Flotation, High Pressure Leaching, Copper, Nickel 1. Introduction

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nickel in liquor, but currently the favoured process is the selective solvent extraction of cobalt away from nickel, using phosphinic acid derivatives, e.g. Cyanex 272. Although this extractant works well in pure solutions, unfortunately it also extracts many other metals commonly found

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Process flowsheet development for beneficiation of nickel ore. ... the selectivity of nickel flotation with both grinding in ceramic and. ... FLOWSHEET DEVELOPMENT FOR BENEFICIATION OF NICKEL …

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nickel flotation feed was sampled and tested in laboratory scale, most of the liberated nickel sulphides were recovered. On the contrary, when the industrial nickel tailing was ... The 5% oxygen gas achieved higher nickel recovery and selectivity than air flotation. Most of the pentlandite lost in the tailings of air and depleted oxygen gas ...

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The challenges in processing nickel laterite ores using flotation process were comprehensively reviewed. Literature shows that flotation has not been successful to recover nickel from laterite ores.

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