Nickel laterite processing: Recovery of nickel from ammoniacal leach liquors

Virnig, Michael; Mackenzie, J. M. W.; Wolfe, G. A.; Boley, B. D.

doi:10.1007/bf03402866

Cited by 4 publications

(4 citation statements)

References 1 publication

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“…3 are calculated considering the relevant equilibria and material balances in which association equilibria of ammonia to nickelhydroxyoxime complex expressed by eqs. (13) and (14) were omitted (Model (a)). Systematic deviation from the experimental data was found only for D(NH 3 ), not for D(Ni).…”

Section: Resultsmentioning

confidence: 99%

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Equilibrium Modeling for Solvent Extraction of Nickel and Ammonia from Alkaline Media with the Extractant LIX84-I

Wang

Narita

et al. 2018

Mater. Trans.

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The equilibria for the extraction of nickel(II) and ammonia from ammonium salt solutions by using the extractant LIX84-I (active component, 2-hydroxy-5-nonylacetophenone oxime) dissolved in a non-polar diluent, ShellSol D70, were studied at pH 210 and 298 K under different ammonium salt concentrations, kinds of counter anions, aqueous phase pH values, and phase ratios. The distribution constant of the nickelhydroxyoxime complex was independent of the kind and concentration of ammonium salt, and the logarithm of the extraction constant of nickel linearly increased with the ionic strength of the aqueous phase. By using the initial conditions and a model based on the present results and those of our previous study concerning copper extraction (Mater. Trans., 58 (2017), 14271433), we were able to predict the extraction behavior of nickel, copper, and ammonia from coppernickel mixed ammonium sulfate solutions. The agreement between the predicted and experimental data confirmed the validity of our model.

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Section: Resultsmentioning

confidence: 99%

“…1,2,27,3336) Thus, we assumed that nickelhydroxyoxime and ammonia would associate in accordance with eqs. (13) and (14) (Model (b)). Therefore, Model (b) was fitted to the experimental data in Fig.…”

Section: Resultsmentioning

confidence: 99%

Equilibrium Modeling for Solvent Extraction of Nickel and Ammonia from Alkaline Media with the Extractant LIX84-I

Wang

Narita

et al. 2018

Mater. Trans.

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“…At present, the main processing methods of laterite nickel ore include pyrometallurgy [12][13][14][15][16] and hydrometallurgy [17][18][19][20][21][22][23]. The pyrometallurgical process mainly deals with metamorphic peridotite with high nickel grade, which contains 1.5 ~ 2% nickel, 10 ~ 40% iron, 5 ~ 35% magnesium oxide and 1 ~ 2% chromium oxide.…”

Section: Introductionmentioning

confidence: 99%

Alkaline Hydrothermal Treatment and Leaching Kinetics of Silicon from Laterite Nickel Ore

Cao

Chang

et al. 2021

Mining, Metallurgy & Exploration

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A new process of extracting silica from laterite nickel ore by hydrothermal treatment with sodium hydroxide as reaction auxiliary agent was proposed. The mineralogical transformation and silicon extraction kinetics of laterite nickel ore in alkaline hydrothermal treatment were studied. The effects of reaction temperature (175 ~ 250℃), molar ratios of sodium hydroxide to ore (1.05 ~ 1.2:1), and laterite nickel ore particle size (44 ~ 178 μm) on the extraction ratio of silica were investigated by using the shrinking core model. The results show that the extraction ratio of silica increases with the increase of reaction temperature, sodium hydroxide to ore molar ratio, reaction time, and the decrease of raw ore particle size. The kinetic analysis shows that the separation of silica in laterite ore can be described by internal diffusion model. The apparent activation energy (E a ) of the reaction was 8.87 kJ mol −1 , and the kinetic modeling was established. KeywordsLaterite nickel ore • Sodium hydroxide • Hydrothermal • Silica • Kinetics Abbreviations C HCl Concentration of hydrochloric acid standard solution (mol/mL) V a Volume of hydrochloric acid consumed in titration (mL) V c Volume of hydrochloric acid consumed in the blank test (mL) C NaOH Concentration of the standard solution of sodium hydroxide (mol/mL) V b Volume of sodium hydroxide consumed in titration (mL) V d Volume of sodium hydroxide consumed in blank test (mL) V Total volume of the solution (L) v Volume of the solution taken (mL) m Mass of silica in the sample (g) k d Diffusion rate constant (min −1 ) k r Reaction rate constant (min −1 ) A Frequency factor (s −1 ) E a Apparent reaction activation energy (J mol −1 ) R Molar gas constant (J/mol K) T Thermodynamic temperature (K) α Extraction rate of SiO 2 (%) d 2 Square of the initial diameter of the raw ore (µm −2 ) XRD X-ray diffraction SEM Scanning electron microscopy EDS Energy disperse spectroscopy XRF X-ray fluorescence * Longjiao Chang

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“…Following leaching, the solution is preneutralised and prepared for either direct treatment by solvent extraction and subsequent refining of nickel and cobalt or by precipitation to produce an intermediate nickel product. [6][7][8] This product (nickel sulphide, nickel carbonate or nickel hydroxide) is further processed before sale as a nickel compound or pure metal.…”

Section: Introductionmentioning

confidence: 99%

Bulk precipitation of nickel and cobalt from sulphate leach liquor by CaO pulp

Oustadakis¹,

Agatzini-Leonardou²,

Tsakiridis³

2007

Mineral Processing and Extractive Metallurgy

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The research work in the present paper determined the conditions at which nickel and cobalt can be recovered, as easily filterable precipitates, from leach liquors, which are produced by sulphuric acid leaching of nickel oxide ores at atmospheric pressure. Nickel and cobalt were precipitated as hydroxides at pH58 . 7, using CaO pulp as a neutralising agent, by 99 . 9 and 99 . 8% respectively. At this pH value manganese and magnesium, which were contained in the leach liquor, were precipitated, having a concentration of about 2 . 6 and 4 . 7% respectively in the final mixed precipitate. Statistical design and analysis of experiments were used in order to determine the main effects and interactions of the precipitation factors, which were the pH value at equilibrium and temperature. The characterisation of the produced mixed precipitate was carried out by X-ray diffraction, thermogravimetric/differential thermal analysis (TG/DTA), scanning electron microscopy and particle size distribution analyser. The main mineralogical phases of the precipitate after drying at 110uC were nickel hydroxide and bassanite (CaSO 4 .0 . 5H 2 O).

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Nickel laterite processing: Recovery of nickel from ammoniacal leach liquors

Cited by 4 publications

References 1 publication

Equilibrium Modeling for Solvent Extraction of Nickel and Ammonia from Alkaline Media with the Extractant LIX84-I

Equilibrium Modeling for Solvent Extraction of Nickel and Ammonia from Alkaline Media with the Extractant LIX84-I

Alkaline Hydrothermal Treatment and Leaching Kinetics of Silicon from Laterite Nickel Ore

Bulk precipitation of nickel and cobalt from sulphate leach liquor by CaO pulp

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