Solvent extraction process for the recovery of nickel and cobalt from Caldag laterite leach solution: The first bench scale study

Kurşunoğlu, Sait; Ichlas, Zela Tanlega; Kaya, Muammer

doi:10.1016/j.hydromet.2017.01.001

Cited by 55 publications

(32 citation statements)

References 19 publications

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“…According to the different compositions of every layer, nickel laterite ores are treated using different methods, including pyrometallurgical and hydrometallurgical methods [13]. Hydrometallurgical techniques are more applicable to limonitic ore, which includes ammonia-ammonium carbonate leaching, pressure acid leaching (PAL), and high-pressure acid leaching (HPAL) [14][15][16][17][18][19][20]. Garnierite is more suitable for pyrometallurgical methods due to the high content of magnesium.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of CaF2 under Vacuum Carbothermal Conditions for Recovering Nickel, Iron, and Magnesium from Garnierite

Wang

et al. 2020

Metals

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Nickel laterite ore is divided into three layers and the garnierite examined in this study belongs to the third layer. Garnierite is characterized by high magnesium and silicon contents. The main contents of garnierite are silicates, and nickel, iron, and magnesium exist in silicates in the form of lattice exchange. Silicate minerals are difficult to destroy so are suitable for smelting using high-temperature pyrometallurgy. To solve the problem of the large amounts of slag produced and the inability to recycle the magnesium in the traditional pyrometallurgical process, we propose a vacuum carbothermal reduction and magnetic separation process to recover nickel, iron, and magnesium from garnierite, and the behavior of the additive CaF2 in the reduction process was investigated. Experiments were conducted under pressures ranging from 10 to 50 Pa with different proportions of CaF2 at different temperatures. The experimental data were obtained by various methods, such as thermogravimetry, differential scanning calorimetry, scanning electron microscopy, energy dispersive spectrometry, X-ray diffraction, and inductively coupled plasma atomic emission spectroscopy. The analysis results indicate that CaF2 directly reacted with Mg2SiO4, MgSiO3, Ni2SiO4, and Fe2SiO4, which were isolated from the bearing minerals, to produce low-melting-point compounds (FeF2, MgF2, NiF2, etc.) at 1315 and 1400 K. This promoted the conversion of the raw materials from a solid–solid reaction to a liquid–liquid reaction, accelerating the mass transfer and the heat transfer of Fe–Ni particles, and formed Si–Ni–Fe alloy particles with diameters of approximately of 20 mm. The smelting materials appeared stratified, hindering the reduction of magnesium. The results of the experiments indicate that at 1723 K, the molar ratio of ore/C was 1:1.2, the addition of CaF2 was 3%, the recovery of Fe and Ni reached 82.97% and 98.21% in the vacuum carbothermal reduction–magnetic separation process, respectively, and the enrichment ratios of Fe and Ni were maximized, reaching 3.18 and 9.35, respectively.

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Section: Introductionmentioning

confidence: 99%

Mechanism of CaF2 under Vacuum Carbothermal Conditions for Recovering Nickel, Iron, and Magnesium from Garnierite

Wang

et al. 2020

Metals

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“…Parte do aumento do processamento de minérios por rotas hidrometalúrgicas ocorreu devido à ascensão da técnica da extração por solventes líquido-líquido [11,32,51,72]. Este processo permite a separação, a purificação e/ou a concentração de metais em solução por meio do contato entre uma fase orgânica e uma solução aquosa contendo íons metálicos.…”

Section: Extração Por Solventesunclassified

“…Como a fase orgânica e a fase aquosa são imiscíveis, ocorre uma separação destas quando se encerra a agitação [13,20,32,73,74]. Kursunoglu et al [11] estudaram a recuperação de níquel e cobalto de uma solução sintética simulando um licor de lixiviação sulfúrica de processamento de minério laterítico. A composição da solução inicial era de 4,1 g.L -1 de Ni 2+ , 0,24 g.L -1 de Co 2+ , 1,6 g.L -1 de Mn 2+ , 0,53 g.L -1 de Ca 2+ e 8,75 g.L -1 de Mg 2+ .…”

Section: Extração Por Solventesunclassified

“…O ácido sulfúrico é o agente lixiviante mais utilizado industrialmente para a lixiviação de minérios lateríticos [2,6,10]. Na etapa de refino de níquel e cobalto, a extração por solventes é uma das únicas técnicas viáveis comercialmente para a separação dos dois metais presentes na fase aquosa lixiviada, pois eles apresentam propriedades químicas similares entre eles [11,12]. No entanto, esta tecnologia possui riscos com relação à saúde ocupacional e proteção contra incêndios, o que encarece seu investimento e os custos de operação.…”

Section: Introductionunclassified

“…2.6.3.1. Produção de cobalto por extração por solventesDentre os estudos realizados visando a recuperação de cobalto via extração por solventes, destacam-se Kursunoglu et al[11], Aliprandini[13,19] e Agatzini-Leonardou et al[14].…”

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Aplicação da eletrodiálise para concentração de metais de uma solução sintética multicomponente de uma rota de processamento de minério limonítico visando a recuperação seletiva de cobalto.

Feijoo¹

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Characterization and bioleaching of nickel laterite ore using Bacillus subtilis strain

Giese

Carpen

Bertolino

et al. 2019

Biotechnology Progress

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There are two principal types of nickel (Ni) deposits: sulfide and laterite ores. Interest in low‐grade Ni‐laterite ores has increased in recent years as high‐grade Ni‐sulfide deposits are being quickly depleted. However, processing of Ni laterites has proven technically difficult and costly, and the development of alternative low‐cost biotechnologies for Ni solubilization has been encouraged. In this context, by the first time, a sample of Brazilian Ni‐laterite ore was analyzed mineralogically and subjected to bioleaching tests using a heterotrophic Bacillus subtilis strain. SEM‐analysis indicated that the primary Ni carrier mineral is goethite. Chemical analysis of different grain size fractions indicated a homogeneous distribution of Ni. XRF‐analysis showed that the ore consists mainly in lizardite (32.6% MgO) and contains1.0% NiO (0.85% Ni). Bioleaching batch experiments demonstrated that about 8.1% Ni (0.7 mg Ni/g ore) were solubilized by the B. subtilis after 7 days. Application of microwave heating as a Ni‐laterite pretreatment was also tested. This pretreatment increased the bioextraction of Ni from 8% to 26% (2.3 mg Ni g−1 ore).

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Solvent extraction process for the recovery of nickel and cobalt from Caldag laterite leach solution: The first bench scale study

Cited by 55 publications

References 19 publications

Mechanism of CaF2 under Vacuum Carbothermal Conditions for Recovering Nickel, Iron, and Magnesium from Garnierite

Mechanism of CaF2 under Vacuum Carbothermal Conditions for Recovering Nickel, Iron, and Magnesium from Garnierite

Aplicação da eletrodiálise para concentração de metais de uma solução sintética multicomponente de uma rota de processamento de minério limonítico visando a recuperação seletiva de cobalto.

Characterization and bioleaching of nickel laterite ore using Bacillus subtilis strain

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