Extraction of manganese from iron rich MnO2 ores via selective sulfation roasting with SO2 followed by water leaching

You, Zhixiong; Li, Guanghui; Zhang, Yuanbo; Peng, Zhiwei; Jiang, Tao

doi:10.1016/j.hydromet.2015.05.017

Cited by 61 publications

(24 citation statements)

References 27 publications

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“…sulfation [26,27] and to process limonitic nickel laterites with a sulfation-roasting-leaching process [28]. Selective sulfation with SO 2 followed by water leaching has also been proposed for extraction of manganese from manganese oxide ore with high iron content [29]. Recent efforts have also been made to recover REEs from bauxite residue and from NdFeB magnets by sulfation, selective roasting, and water leaching [30,31].…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Recoveries of Valuable Metals from Spent Nickel Metal Hydride Vehicle Batteries via Sulfation, Selective Roasting, and Water Leaching

Korkmaz

Alemrajabi

Rasmuson

et al. 2018

J. Sustain. Metall.

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The recoveries of rare earth elements (REEs), nickel, and cobalt from hybrid electric vehicle batteries by sulfation, selective roasting, and water leaching have been studied. The cathode and anode materials of a Panasonic Prismatic Module nickel metal hydride (NiMH) battery were used in the study. The optimal conditions for each step of the process were determined by performing lab-scale experiments. It was found that 8 mol/L of sulfuric acid was sufficient for the sulfation with a solid-to-liquid ratio of 1/5. The optimal roasting conditions was determined to be 850°C for 2 h. Under optimal conditions, 96% of the REEs could be obtained in the aqueous phase with negligible contamination of Ni and Co. The Ni and Co remained in solid phase as oxides together with traces of aluminum, zinc, and iron oxides. This method provides a way for the separation of the REEs from nickel, cobalt, and other elements present in the NiMH battery, into a leachate suitable for further processing.

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Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Recoveries of Valuable Metals from Spent Nickel Metal Hydride Vehicle Batteries via Sulfation, Selective Roasting, and Water Leaching

Korkmaz

Alemrajabi

Rasmuson

et al. 2018

J. Sustain. Metall.

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“…The introduction of electric field could facilitate Equation (3-7) and Eqs (3)(4)(5)(6)(7)(8) towards the right and accelerate the dissolution of FeS2, thus acquiring an unremitting accumulation of Fe 2+ in the solution, which contributes to the reductive leaching of pyrolusite. Simultaneously, the Fe 3+ generated by the reduction of pyrolusite will further expedite the oxidation of pyrite and the whole reaction progress.…”

Section: +mentioning

confidence: 99%

“…As the rapid development in the past several decades, the comprehensive utilization is relatively low because the grade of rhodochrosite continues to decline and its composition becomes increasingly complicated, which restricts the development of electrolytic manganese industry in China [3]. Therefore, much attention has been paid to the research of pyrolusite [4][5][6]. The main component of pyrolusite is MnO2 which possesses strong stabilization in acid or alkaline oxidizing conditions [7,8].…”

Section: Introductionmentioning

confidence: 99%

Dynamics analysis of extraction of manganese intensified by electric field

Ma¹,

Tao²,

Li³

et al. 2018

AIP Conference Proceedings

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Abstract. In this study, a process reinforcement technology for leaching process of pyrolusite was developed. The electric field was introduced to decrease reaction temperature and improve the leaching rate of pyrolusite. The mechanisms of electric field intensifying leaching process of pyrolusite were investigated through X-ray diffraction (XRD), and Brunauer Emmett Teller (BET) in detail. The results showed that the electric field could decrease obviously the apparent activation energy of leaching process of pyrolusite. The apparent activation energy of the leaching of pyrolusite intensified by electric field was calculated to be 53.76 kJ·mol -1 . In addition, the leaching efficiency of manganese was effectively increased by 10% to 20% than that without electric field under the same conditions. This was because that the electron conduit between Fe (II)/Fe (III) and pyrite was dredged effectively by electric field.

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“…As the manganese ore with Mn/Fe is lower than 3, which is called high-iron manganese oxide ore, it cannot be directly used as a raw material for ferromanganese production (Gao et al, 2012). As manganese dioxide, the main content of manganese oxide ore, is insoluble in dilute sulfuric acid and alkaline media, so a reduction roasting process must be adopted to convert tetravalent Mn to bivalent forms first by carbon/carbon monoxide (Gao et al, 2012;Ye et al, 2014;Zhang et al, 2015b), and sulfur/ sulfur dioxide (Abou-El-Sherbini 2002; You et al, 2015) at 700-900°C, then followed by sulfuric acid leaching for the formation of manganese sulfate product (Zhang et al, 2013;You et al, 2015). However, the main problems with the reduction roasting process are the low efficiency of recovery of Mn, high investment, intensive energy consumption and operating cost and CO 2 , SO x , a great amount of smoke dust are released during the calcination process, which will lead to secondary pollution (Zhang and Cheng, 2007a).…”

Section: Introductionmentioning

confidence: 99%

Study on Separation of Manganese from Iron in High-Iron Pyrolusite Ore by Leaching with Simulated Flue Gas

Deng

et al. 2017

J. Chem. Eng. Japan / JCEJ

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Due to the depletion of high-grade manganese ore, much attention has turned to recover manganese from low-grade ores; however, these are usually associated with high-iron content. Moreover, the conventional process of extracting Mn from iron-rich low grade manganese oxide ore focused on recovery of Mn, while ignoring the leaching characteristics of Fe. Hence, simultaneous investigations on leaching behavior and separation e ciency of both manganese and iron were carried out for attaining high recovery of manganese with low iron content from the high-iron low-grade pyrolusite ore using simulated ue gas as the reductant. The e ects of leaching parameters, ue gas components and initial particle size on the leaching e ciency of Mn and Fe were studied, and the results indicated that higher separation e ciency of Mn from iron was achieved at lower SO 2 concentration, O 2 concentration and suitable pulp density. The experimental validation revealed that 93.12% Mn and only 2.57% Fe were extracted under the optimal operating conditions: SO 2 percentage of 5%, O 2 percentage of 1%, reaction temperature of 35°C, solid-to-liquid ratio of 250 g/L, and more than 120 min. Kinetic modelling has indicated that the Mn leaching rate is controlled by the rate of di usion of SO 2 /O 2 from the gas phase to the liquid phase, and the rate of di usion of product or reactants to the ore surface through an inert product layer is the rate-limiting step for Fe dissolution.

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Extraction of manganese from iron rich MnO2 ores via selective sulfation roasting with SO2 followed by water leaching

Cited by 61 publications

References 27 publications

Recoveries of Valuable Metals from Spent Nickel Metal Hydride Vehicle Batteries via Sulfation, Selective Roasting, and Water Leaching

Recoveries of Valuable Metals from Spent Nickel Metal Hydride Vehicle Batteries via Sulfation, Selective Roasting, and Water Leaching

Dynamics analysis of extraction of manganese intensified by electric field

Study on Separation of Manganese from Iron in High-Iron Pyrolusite Ore by Leaching with Simulated Flue Gas

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