Using iron promoted manganese oxide ore for simultaneous flue gas desulfurization and Mn leaching: a process study

被引：0
|
作者：
Yao L. [1 ,2 ]
Xin G. [1 ]
Yang L. [1 ,2 ]
Pu P. [1 ]
Jiang X. [1 ,2 ]
Jiang W. [1 ,2 ]
机构：
[1] College of Architecture and Environment, Sichuan University, Chengdu
[2] National Engineering Research Center for Flus Gas Desulfurization, Chengdu
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 05期
关键词：
Desulfurization; Environment; Flue gas; Iron; Leaching; Manganese oxide ore;
D O I：
10.16085/j.issn.1000-6613.2020-1067
中图分类号：
学科分类号：
摘要：
In order to remove SO2 from manganese slag calcination process, and combine with the production features of electrolytic manganese production enterprises, the manganese oxide ore was used as the raw material, and the wastewater anode solution of electrolytic manganese was used to prepare the ore pulp (desulfurizer). The influences of processing parameters and FeSO4 added on desulfurization and manganese leaching were studied. The results indicated that the introduction of FeSO4 promoted the Mn leaching via the redox reaction between MnO2 and FeSO4, and then, the product (Fe3+) and the Mn2+ in solution could act as the catalyst to catalyze the desulfurization reaction. The desulfurization activity and the Mn leaching rate increased with the decrease of the ore particle size. With the increase of reaction temperature, the desulfurization activity decreased, and the Mn leaching rate increased at first and then decreased which reached the maximum value at 60℃. When the liquid-solid ratio and the inlet flow rate increases, the desulfurization efficiency decreased, but the Mn leaching rate was enhanced. The 5-stage manganese oxide slurry desulfurization of the 7% flue gas with FeSO4 added showed that the outlet SO2 was 293μL/L, and the Mn2+ concentration of lixivium was 44.72g/L, which met the requirements of electrolytic manganese. The present flue gas desulfurization system could recycle the wastewater anode solution of electrolytic manganese, and provide a new technology for sulfur dioxide removal from flue gas and Mn extraction form manganese oxide ore simultaneously. The present study provides theoretical basis and technical reference for clean production and comprehensive utilization of resources in electrolytic manganese industry. © 2021, Chemical Industry Press Co., Ltd. All right reserved.
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页码：2859 / 2866
页数：7
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