Physicochemical factors affecting leaching of laterite ore in hydrochloric acid

Li, Jinhui; Xiong, Dan; Chen, Hao; Wang, Ruixiang; Liang, Yong

doi:10.1016/j.hydromet.2012.08.001

Cited by 32 publications

(18 citation statements)

References 15 publications

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“…However, the increasing of rheology had not a noticeable influence on the kinetics. Some scholars [2,29,31] have completed studies on different laterite ores in the atmosphere hydrochloric acid leaching conditions. Li et al [2] studied the effect of physicochemical factors on laterite ore leaching in hydrochloric acid.…”

Section: Advances In Computer Sciencementioning

confidence: 99%

“…Under alkaline conditions, the oxidizability of Mn 2+ is weakened, whereas its reducibility is enhanced. 2 , and MnO 2 through added NaOH used to controlling the pH, leaving Mg 2+ in the liquor. Then Ni and Co were leached in the acid, and the separation of manganese was realized since MnO 2 does not dissolve in dilute acidic liquors.…”

Section: Advances In Computer Sciencementioning

confidence: 99%

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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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Section: Advances In Computer Sciencementioning

confidence: 99%

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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“…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;Thubakgale et al, 2013;Landers et al, 2009;Mohammadreza et al, 2014), hydrochloric acid (Ayanda et al, 2011;Park and Nam, 2008;Agacayak et. al., 2011;Olanipekun, 2000;Wang et al 2012;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;Zuniga et al, 2010), citric acid, oxalic acid and acetic acid (Sahu et al, 2011;Behera et al, 2010;Panchanadikar, 1993, Kursunoglu andKaya, 2015). The main aim in leaching studies is to provide metal extraction with high recovery.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Nickel Extraction From Lateritic Ore in Hydrochloric Acid Solution With Hydrogen Peroxide by Taguchi Method

Aras¹,

Agacayak²

2017

Scitech

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Taguchi optimization method was used to determine optimum conditions for the extraction of nickel from lateritic ore in hydrochloric acid solution with hydrogen peroxide. Leaching time, stirring speed, temperature, hydrochloric acid concentration and hydrogen peroxide concentration were chosen as parameters. The optimum conditions for dissolution w ere found as leaching time of 240 min, a temperature of 70°C, hydrochloric acid concentration of 3 M, hydrogen peroxide concentration of 0.1 M and without stirring. The experimental results under optimum leaching conditions, showed that the extraction of nickel from lateritic ore was 90.66%. Analysis of variance (ANOVA) was applied to experimental results. Percentage contributions of each factor for the extraction of nickel were determined. Key Words: Leaching, Lateritic ore, Nickel; Hydrochloric acid, Hydrogen peroxide; Taguchi method Nikelin Lateritik Cevherden Hidrojen Peroksitli Hidroklorik Asit Çözeltisinde ÇözündürülmesininTaguchi Yöntemiyle Optimizasyonu ÖZ: Nikelin lateritik cevherden hidrojen peroksitli hidroklorik asit çözeltisinde çözündürülmesinin optimum koşullarını belirlemek için Taguchi optimizasyon yöntemi kullanılmıştır. Deney parametreleri olarak, süre, karıştırma hızı, sıcaklık, hidroklorik asit derişimi ve hidrojen peroksit derişimi seçilmiştir. Çözündürme için optimum koşullar, karıştırma yapılmadan, 240 dakika liç süresi, 70 °C sıcaklık, 3 M hidroklorik asit derişimi ve 0.1 M hidrojen peroksit derişimi olarak bulunmuştur. Optimum koşullarda yapılan deney sonuçları, nikelin lateritik cevherden çözündürülmesinin %90.66 olduğunu göstermiştir. Deney sonuçlarına varyans analizi (ANOVA) uygulanmış ve her faktörün nikel çözündürülmesine olan katkısı belirlenmiştir.

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“…Compared with pressure acid leaching process, atmospheric acid leaching process has the advantages of high extraction efficiency, low energy consumption and low equipment cost etc. [5][6][7][8] However, as for acid leaching process, it is worth noting that many impurity ions (for example, Fe 3+ , Mg 2+ and Mn 2+ , etc.) besides Ni 2+ are co-existing in the acid solution after leaching process, and importantly, the content of impurity ions is even higher than that of Ni 2+ in the leaching solution, which might lead to nickel loss and difficult separation [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, it can be observed that when the initial acid concentration increased from 2.75 to 3.0 mol·L -1 , the leaching efficiencies of Mn, Co and Mg increased from 87.0% to 97.7%, 84.8% to 97.7% and 72.6% to 80.5%, respectively, indicating that the initial acid concentration had greater effect on promoting the leaching efficiencies of Mn, Co and Mg compared with that of other metals. This can be explained that the metal efficiencies might be related to the elemental distributions in the ores and mineral dissolution behaviors[8]. However, it is worth noting that the content of Mn and Co in the laterite blends is about 0.75%, namely, it has little effects on the overall concentration of metal ion in the leaching solution.…”

mentioning

confidence: 99%