Dissolution behavior of Caldag lateritic nickel ore subjected to a sequential organic acid leaching method

Kurşunoğlu, Sait; Kaya, Muammer

doi:10.1007/s12613-015-1177-9

Cited by 15 publications

(7 citation statements)

References 16 publications

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“…For this phenomenon, a thermodynamic analysis was conducted that may have occurred during the reduction process. The four possible reactions for Ni 2 SiO 4 and Fe 2 SiO 4 are shown in equations (4) to (7) with the relationship of gibbs free energy and temperature. According to the calculation, the initial temperature of samples (4), (5), (6) and (7) were 379.6 K, 730 K, 533.3 K, and 828.5 K respectively, and initial temperature was low, which can explain the formation of Ca 2 SiO 4 .…”

Section: Additive Effects and Thermodynamic Analysismentioning

confidence: 99%

“…Smelting methods for nickel laterite ore are divided into three categories: pyrometallurgical, hydrometallurgical, and the pyrometallurgyhydrometallurgy united metallurgical technology [5][6][7][8][9][10][11][12][13][14]. Besides, the study on the application of magnetic separation technology in metallurgy became more common in recent years [15].…”

Section: Introductionmentioning

confidence: 99%

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The effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnierite

Wang

X.-P.

et al. 2019

J min metall B Metall

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The effects of adding CaO during a vacuum carbothermal reduction on Fe and Ni recovery yields were examined. In addition, magnetic separation was investigated. Experiments were conducted under pressures ranging from 10 to 50 Pa with different proportions of CaO at different temperatures. The results indicated that at 1723 K, the mass ratio of ore/C was 100:65.5; when the amount of CaO was 22.64% (the mole ratio of CaO/Si was 1:1), the recovery of Fe and Ni reached 84.33% and 97.00% in the vacuum carbothermal reduction-magnetic separation process, and the enrichment ratios of Fe and Ni were maximized, reaching 6.32 and 6.72, respectively. In addition, the recovery of Mg in the reduction process reached 99.35%. An analysis of the experimental results also indicated that the addition of CaO could cause the Fe-Si alloy to transform into the Fe-Ni alloy in the nickel-rich residue, which increased the content of Fe-Ni in the magnetic separation material from 13.34% to 73.17%. In addition, the concentration in reduced ore of Si from 45.43% increased to 83.68%, which could reduce the evaporation of Si in the form of SiO at high temperatures. If Si volatilized in the form of SiO during the condensation process, SiO would disproportionate to form Si and SiO 2 contaminated condensed magnesium. In summary, the valuable metals in the minerals were comprehensively utilized with the addition of CaO. Jou rn al of Min in g an d Metallu rgy, S ection B: Metallu rgyhttps://doi.org/10.2298/JMMB190213035W

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Section: Additive Effects and Thermodynamic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnierite

Wang

X.-P.

et al. 2019

J min metall B Metall

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“…Meanwhile, it was found that serpentine is more easily leached than goethite and talc by using XRD and FTIR spectroscopy. Kursunoglu and Kaya [38] investigated the dissolution behavior of Caldag lateritic nickel ore subjected to a sequential organic acid leaching method. After two leaching step, namely, 8h (4h + 4h) of leaching with organic acids (0.5 mol/L citric + 0.5 mol/L oxatic ) in sequence at 90℃, 89.63% Ni, 82.89% Co, and 69.63% Fe were leached from the lateritic nickel ore (Ni 1.0813%, Fe 21.916%, Co 0.0493%).…”

Section: Advances In Computer Sciencementioning

confidence: 99%

Current Studies of Treating Processes for Nickel Laterite Ores

Wang¹,

Sun

Chen

et al. 2017

Proceedings of the 2nd International Conference on Mechatronics Engineering and Information Technology (ICMEIT 2017)

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Abstract. Nickel laterite ores are important nickel resources, which are abundant and account for approximately 70% of the world nickel reserves. However, nickel in nickel laterite ores could not be extracted by conventional separation methods. Consequently, treating and utilizing nickel laterite ores efficiently is of vital importance. This article reviews hydrometallurgical processes, pyro metallurgical methods, and reduction roasting-magnetic separation technique with reference to current studies of treating processes for nickel laterite ores.

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“…In the literature, there are several studies related to lateritic nickel leaching in different solutions using high pressure or atmospheric pressure (agitation or heap leaching). The solutions used in these studies can be given as sulphuric acid (Georgiou and Papangelakis, 1998;Agacayak and Zedef, 2012;Luo et al, 2010;Stopic et al, 2002;Ayanda et al, 2011;Rubisov et al, 2000;Agatzini-Leonardou and Zafiratos, 2004;McDonald and Whittington, 2008a;Mohammadreza et al, 2014), hydrochloric acid (Ayanda et al, 2011;Park and Nam, 2008;Agacayak et al, 2011;Guo et al, 2015;McDonald and Whittington, 2008b;Li et al, 2012), nitric acid (Agacayak and Zedef, 2013;Ayanda et al, 2011;Ma et al, 2013), ammonia (Zhai et al, 2010;Chen et al, 2010;Zuniga et al, 2010), citric acid, oxalic acid and acetic acid (Sahu et al, 2011;Behera et al, 2010;Sukla and Panchanadikar, 1993;Kursunoglu and Kaya, 2015). In the present work, to investigate the effects of parameters such as stirring speed, sulphuric acid concentration, sodium fluoride concentration and temperature on the leaching of nickel from a limonitic laterite ore and to describe dissolution kinetics of nickel was aimed.…”

Section: Figurementioning

confidence: 99%

Dissolution Kinetics of Nickel From Gördes (Mani̇sa-Turkey) Lateritic Ore by Sulphuric Acid Leaching Under Effect of Sodium Fluoride

Agacayak¹,

Aras²

2017

Scitech

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ABSTRACT:In this study, dissolution kinetics of nickel from Gördes (Manisa-Turkey) lateritic ore by sodium fluoride in sulphuric acid solution was investigated. The effects of stirring speed, sulphuric acid concentration, sodium fluoride concentration and temperature on nickel extraction were examined. To determine the dissolution kinetics of nickel in sulphuric acid medium under effect of sodium fluoride, shrinking core model was applied to dissolution recoveries. As a result of kinetic studies, it was determined that mixed kinetic model was appropriate. The activation energy (Ea) for the dissolution was calculated as 41.24 kJ/mol.

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Dissolution behavior of Caldag lateritic nickel ore subjected to a sequential organic acid leaching method

Cited by 15 publications

References 16 publications

The effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnierite

The effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnierite

Current Studies of Treating Processes for Nickel Laterite Ores

Dissolution Kinetics of Nickel From Gördes (Mani̇sa-Turkey) Lateritic Ore by Sulphuric Acid Leaching Under Effect of Sodium Fluoride

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