manganese oxide ore
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2022 ◽  
Vol 306 ◽  
pp. 114497
Author(s):  
Zhixing Xiao ◽  
Qitao Jiang ◽  
Yi Li ◽  
Jun Zhou ◽  
Dan Chen ◽  
...  

2020 ◽  
Vol 8 (6) ◽  
pp. 104491
Author(s):  
Thi Thuc Quyen Nguyen ◽  
Paripurnanda Loganathan ◽  
Tien Vinh Nguyen ◽  
Saravanamuthu Vigneswaran

2019 ◽  
Vol 27 (5) ◽  
pp. 5490-5502 ◽  
Author(s):  
Thi Thuc Quyen Nguyen ◽  
Paripurnanda Loganathan ◽  
Tien Vinh Nguyen ◽  
Saravanamuthu Vigneswaran

2019 ◽  
Vol 116 (4) ◽  
pp. 422
Author(s):  
Fangfang Wu ◽  
Zhu Xiao ◽  
Bin Zeng ◽  
Long Chen ◽  
Hui Liu ◽  
...  

Reduction leaching behaviors of Fe and Mn from an iron-rich manganese oxide ore using waste tobacco stem concrete as reducing agent were investigated in this paper with a view to determining the feasibility of tobacco stem concrete used in reduction leaching of Mn from iron-rich manganese oxide ore. Results indicated that the leaching processes of Fe and Mn were both dominated by internal diffusion, but the effects of leaching parameters on leaching ratios of Fe and Mn were different based on established leaching kinetic equations. The leaching ratio of Mn reached up to 96.18% while that of Fe kept a lower concentration (17.66%) under optimal leaching conditions, which achieved high selectivity recovery of Mn from iron-rich manganese oxide ore. In addition, the leached solution can be used as electrolytic stock solution in the production of electrolytic manganese. Characterization of the obtained electrolytic manganese product indicated that the quality of electrolytic manganese fully met the standards of YB/T 051-2003, which disclosing a novel recycling approach of utilizing the resource coming from the tobacco industry.


2018 ◽  
Vol 330 ◽  
pp. 310-316 ◽  
Author(s):  
Zhixiong You ◽  
Guanghui Li ◽  
Jie Dang ◽  
Wenzhou Yu ◽  
Xuewei Lv

2017 ◽  
pp. B31682.1
Author(s):  
Sarah K. Carmichael ◽  
Daniel H. Doctor ◽  
Crystal G. Wilson ◽  
Joshua Feierstein ◽  
Ryan J. McAleer

2017 ◽  
Vol 53 (2) ◽  
pp. 115-122 ◽  
Author(s):  
Z. You ◽  
G. Li ◽  
Z. Peng ◽  
L. Qin ◽  
Y. Zhang ◽  
...  

It is very important to selectively reduce manganese oxide over iron oxide for extraction of Mn from iron-rich manganese ore. In this study, reductive roasting of an iron-rich manganese oxide ore with elemental sulfur as reductant was investigated. The experimental results demonstrated that manganese dioxide can be selectively reduced with elemental sulfur and extracted via acid leaching, which was largely depended on the sulfur addition. Lower sulfur addition (S/Mn molar ratio<1.0) results in higher selectivity, which is independent of roasting temperature. More than 95% manganese and less than 10% iron were extracted through acid leaching under the roasting conditions of 400-600?C with S/Mn molar ratio of 0.6. The contents of manganese sulfide and sulfate in the roasted product increased with increasing sulfur addition, while they decreased distinctly at temperatures above 550?C. The thermodynamic analysis also proved that manganese dioxide is more easily reduced than iron oxide by sulfur at 300-900 K. The phase transformations during reductive roasting revealed that sulfides (MnS and FeS2) were favored at temperatures lower than 550?C whereas the oxides (MnFe2O4 and Fe3O4) were predominant at higher temperatures. The reduction of iron oxide mainly occurred at large sulfur additions (S/Mn>2.0) and the roasting temperature exerted a significant impact on the phase composition of roasted product.


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