Synchronous extraction of nickel and copper from a mixed oxide-sulfide nickel ore in a low-temperature roasting system

Mu, Wennning; Cui, Fuhui; Huang, Zhipeng; Zhai, Yuchun; Xu, Qian; Luo, Shaohua

doi:10.1016/j.jclepro.2017.12.260

Cited by 59 publications

(14 citation statements)

References 19 publications

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“…Previous studies showed that the sulfation of nickel remained at a relatively low level after roasting with ammonium sulfate additive alone, but if other chemical media (sodium sulfate, sulfuric acid, etc.) were added, the sulfation yield of nickel reached 90% or more [19,20,39]. Additionally, similar studies have shown that incomplete sulfation of nickel is still exhibited during the roasting process, even after increasing the dosage of ammonium sulfate [2].…”

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confidence: 72%

“…The selective reduction technique is more suitable for the treatment of nickel laterite, while selective leaching is a more appropriate process for NOSMO. The fundamental concept of selective leaching is to transform nickel oxides or nickel sulfides into water-or acid-soluble phases, while iron and other impurities remain in solid slag [20,21]. In order to obtain higher extraction rates of valuable nonferrous metals, different kinds of chemical additives have been used for activated roasting pretreatment before the selective leaching process [22][23][24].…”

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confidence: 99%

“…As a potentially more economic and green metallurgical process, ammonium sulfate activation roasting has shown good applicability and has been widely investigated recently [19,20,26,30,[35][36][37][38]. In particular, Mu et al developed a low-temperature roasting-water leaching technique to treat complex low-grade nickel ore and achieved high extraction rates of nonferrous metals from raw minerals [19,20,39]. It was found that the gas products generated from ammonium sulfate thermal decomposition include NH 3 , SO 2 , N 2 , and H 2 O [40,41].…”

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confidence: 99%

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Sulfation Roasting of Nickel Oxide–Sulfide Mixed Ore Concentrate in the Presence of Ammonium Sulfate: Experimental and DFT Studies

Xiong

Wang

et al. 2019

Metals

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Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide mixed ore concentrate was roasted with the addition of ammonium sulfate under a static air atmosphere, and the roasted products were leached by water, in order to evaluate the extraction of metals. The ammonium sulfate activation roasting was investigated thoroughly and systematically by thermogravimetry–differential scanning calorimetry, X-ray diffraction, and scanning electron microscopy. Particularly, the interface sulfation behavior and path were studied by the density functional theory (DFT) method. The results showed that a large amount of nonferrous metal sulfate (70% Ni, 89% Co, and 90% Cu) was generated, while iron was almost entirely transformed into iron oxide under appropriate roasting conditions of adding ammonium sulfate at a mass ratio of 200%, heating to 650 °C at 10 °C/min, and holding for 120 min. It was found that activation of ammonium sulfate can take two different paths: one in which ammonium sulfate directly reacts with raw ores below 500 °C and the other in which the SO2 decomposed from sulfates (ammonium sulfate, intermediate ammonium ferric sulfate, and ferric sulfate) reacts with the intermediate metal sulfides (NiS and Cu2S). The interface sulfation mechanism of NiS and Cu2S was investigated deeply by DFT method, which showed that there are two paths of sulfation for NiS or Cu2S, and both of them are thermodynamically favored. Thus, a thorough and systematic investigation of ammonium sulfate activation roasting of nickel oxide–sulfide mixed ore is provided; this might be a potential basis for future industrial applications of ammonium sulfate activation roasting techniques in complex mineral metallurgy.

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Sulfation Roasting of Nickel Oxide–Sulfide Mixed Ore Concentrate in the Presence of Ammonium Sulfate: Experimental and DFT Studies

Xiong

Wang

et al. 2019

Metals

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“…the sulfate formation of nickel. Mu et al [55] reported a process for synchronous extraction of nickel and copper from a mixed oxide-sulfide nickel ore in a low-temperature roasting system. In this process, sodium sulfate was used as an additive for improving the extraction of nickel by converting into Na-pyrosulfate, and more than 97% of nickel could be extracted after roasting at 450 °C for 4 h. Liu et al [56] used ammonium sulfate roasting-water leaching process to treat low-grade nickel sulfide ore. Firstly, ammonium sulfate and nickel sulfide ore were mixed according to the mass ratio of 4:5, and then roasted at 400 °C for 2 h for water leaching.…”

Section: • Chloridizing Roasting-water Leachingmentioning

confidence: 99%

Comprehensive Review on Metallurgical Upgradation Processes of Nickel Sulfide Ores

Zhao

Gao

Yang

2022

J. Sustain. Metall.

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With the vigorously growing demand of the steel industry, corrosion resistance alloys, clean energy industries, and a variety of engineered infrastructure or technology, high-grade nickel ores are being exhausted gradually in the world. This review outlines metallurgical processes for nickel production from various nickel sulfide ores resources, particularly focusing on recent developments in metallurgical processes to identify potential trends and technical requirements in nickel metallurgy. The main methods have been extensively reviewed for nickel extraction from nickel sulfide ores which maybe are potentially applicable to provide new ideas for smelting technology innovation of nickel and even other similar metals. The main metallurgical methods include pyrometallurgical and hydrometallurgy, containing smelting, leaching, and purification. The advantages and disadvantages of each typical process have been analyzed and compared in this review, and a special emphasis is put forth. Biological metallurgy is highly selective for recovery of nickel and the most promising method recommended for future research and development. Moreover, ion exchange offers useful method for extraction and purification of nickel. In addition, many of the typical new methods involved are also introduced in this article.

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“…Segregation roasting, a technology that applies to the theory of chlorination metallurgy, shows excellent performance in extracting valuable compositions and removing harmful ones from complex refractory iron ore. The methods applied to processing high phosphorus oolitic iron ore are mainly magnetic roasting [18], direct reduction [19], deep reduction, and suspension roasting, along with others [20,21].…”

Section: Introductionmentioning

confidence: 99%

Upgrading iron and removing phosphorus of high phosphorus oolitic iron ore by segregation roasting with calcium chloride and calcium hypochlorite

Xiao

Ding

Yang

et al. 2019

J min metall B Metall

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The iron-bearing ore, existing in the form of oolite, was mainly composed of hematite, limonite, daphnite, and collophane. The harmful element phosphorus content was 1.56%, belonging to high phosphorus ooliticiron ore in western Hubei. In this study, segregation roasting and low intensity magnetic separation techniques were applied for upgrading iron and removing phosphorus. The ores, the chlorinating agent, and the reducing agent were mixed into the roasting furnace for segregation roasting. After being transferred from the weak magnetic minerals to the strong ones, the iron was recovered by low intensity magnetic separation. During segregation roasting, new ore phases, metallic iron (Fe), a small amount of ferroferric oxide (Fe 3 O 4), and ferrous oxide (FeO) could be observed. The results showed that the iron concentrate with the Fe content of 90.3%, the phosphorus content of 0.15%, and the iron recovery of 92.9% were obtained under the segregation roasting temperature of 1273 K, and the roasting time of 90 min, CaCl 2 (calcium chloride) 20%, Ca (ClO) 2 (calcium hypochlorite) 3%, the dosage of coke 20%, and low intensity magnetic separation field intensity 0.12 T.

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Synchronous extraction of nickel and copper from a mixed oxide-sulfide nickel ore in a low-temperature roasting system

Cited by 59 publications

References 19 publications

Sulfation Roasting of Nickel Oxide–Sulfide Mixed Ore Concentrate in the Presence of Ammonium Sulfate: Experimental and DFT Studies

Sulfation Roasting of Nickel Oxide–Sulfide Mixed Ore Concentrate in the Presence of Ammonium Sulfate: Experimental and DFT Studies

Comprehensive Review on Metallurgical Upgradation Processes of Nickel Sulfide Ores

Upgrading iron and removing phosphorus of high phosphorus oolitic iron ore by segregation roasting with calcium chloride and calcium hypochlorite

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