Leaching process and kinetics of manganese in low-grade manganese ore

The leaching process of Malaysian low grade manganese ore (LGMO) using bamboo sawdust (BSD) as reducing agent in acidic medium (H2SO4) and the dissolution kinetics of this ore was investigated. Acid concentration, reaction temperature, and BSD loading were chosen as experimental parameters through application of response surface methodology (RSM). For analysis of the kinetic data in this study, the SCM with surface chemical reaction and diffusion through product layer, the mixed control modelled and also new variant SCM were evaluated. The reaction kinetics of this leaching process was determined, and it is observed that it fits the model of 1-23X-(1-X)23=kt with activation energy of 69.3kJ/mol. The reaction rate for LGMO leaching using BSD was found to be diffusion through product layer.

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Preliminary Studies on Acid Leaching of Finely-Ground Malaysian Low Grade Manganese Ore (LGMO)

Materials Science Forum ◽

10.4028/www.scientific.net/msf.840.364 ◽

2016 ◽

Vol 840 ◽

pp. 364-368 ◽

Cited By ~ 1

Author(s):

Mohd Fasyraf Hafizi Mohd Rozali ◽

Nurulfazielah Nasir ◽

Suhaina Ismail ◽

Norazharuddin Shah Abdullah

Keyword(s):

Sulfuric Acid ◽

Fine Particle ◽

Acid Leaching ◽

Reducing Agents ◽

Low Grade ◽

Manganese Ore ◽

Particle Sizes ◽

Leaching Process

Ore samples, believed to be low grade manganese ore were characterized using XRD, XRF and SEM, before being ground further into very fine particle sizes going through a preliminary leaching process. Sulfuric acid was chosen as the leachant, and leaching was done without any presence of reducing agents.

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Kinetics of the Leaching Process of an Australian Gibbsitic Bauxite by Hydrochloric Acid

Advances in Materials Science and Engineering ◽

10.1155/2016/5813542 ◽

2016 ◽

Vol 2016 ◽

pp. 1-6 ◽

Cited By ~ 2

Author(s):

Aichun Zhao ◽

Ting-an Zhang ◽

Guozhi Lv ◽

Wenyan Tian

Keyword(s):

Activation Energy ◽

Hydrochloric Acid ◽

Acid Leaching ◽

Low Grade ◽

Good Theory ◽

Alumina Production ◽

Work Analysis ◽

Leaching Process ◽

Hydrochloric Acid Leaching ◽

Kinetics Of

Gibbsitic bauxite from Australia was leached by hydrochloric acid in this work. Analysis on kinetics for the extraction of Al2O3was quantitatively studied. It was concluded that the hydrochloric acid leaching process of gibbsitic bauxite was controlled by chemical reaction. Moreover, the mechanism for the dissolution followed the equation,ln⁡k=39.44-1.66×104(1/T), with an apparent activation energy of 137.90 kJ/mol, according to the equation ofk=Ae-Ea/RT. This work aims to provide a good theory support for the process control by using a new method of alumina production from the low grade bauxite.

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Transformation and leaching kinetics of silicon from low-grade nickel laterite ore by pre-roasting and alkaline leaching process

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(18)64650-3 ◽

2018 ◽

Vol 28 (1) ◽

pp. 169-176 ◽

Cited By ~ 10

Author(s):

Wen-ning MU ◽

Xiu-yuan LU ◽

Fu-hui CUI ◽

Shao-hua LUO ◽

Yu-chun ZHAI

Keyword(s):

Low Grade ◽

Leaching Kinetics ◽

Nickel Laterite ◽

Alkaline Leaching ◽

Leaching Process ◽

Nickel Laterite Ore ◽

Kinetics Of ◽

Laterite Ore

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Research status of microwave-assisted reduction technology of pyrolusite

Current Microwave Chemistry ◽

10.2174/2213335607999201222095248 ◽

2020 ◽

Vol 07 ◽

Author(s):

Li Qiannan ◽

Ling Yeqing ◽

Zheng Hewen ◽

Yang Zhi

Keyword(s):

Metallurgical Industry ◽

Raw Material ◽

Utilization Efficiency ◽

Low Grade ◽

Manganese Ore ◽

Effective Utilization ◽

Research Status ◽

Strategic Position ◽

Research Intensity ◽

Stable Development

: Manganese ore is an important metallurgical raw material that holds an important strategic position in the national economy of China. However, the grade of manganese ore in the country is mostly low, and the utilization efficiency of lowgrade manganese ore resources is low, which seriously restrict the healthy and stable development of China’s metallurgical industry. As a new green heating method, microwave is expected to address the problems of conventional methods and realize the effective utilization of low-grade manganese ore. In this paper, the research status of the microwave composite reduction of pyrolusite in recent years is reviewed. Microwave plays an important role in metallurgy, and it is the current direction pursued to improve the research intensity of microwave heating and extend it to actual industrial processes.

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