Roasting reduction and its kinetics of low-grade pyrolusite by biomass char

被引：7

作者：

Feng, Ya-Li ^{[1
]}

Zhang, Shi-Yuan ^{[1
,2
]}

Li, Hao-Ran ^{[2
]}

Zhou, Yu-Zhao ^{[1
]}

机构：

[1] School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing

[2] National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2015年 / 36卷 / 10期

关键词：

Biomass char; Low-grade pyrolusite; Mechanism study; Reaction kinetics; Roasting reduction;

D O I：

10.3969/j.issn.1005-3026.2015.10.025

中图分类号：

学科分类号：

摘要：

Roasting reduction contrast experiments of low-grade pyrolusite were performed by using biomass char and activated carbon as the reductant in a tube furnace. The effects of roasting temperature, roasting time and the dosage of biomass char on manganese reduction efficiency of pyrolusite were studied, and X-ray diffraction analysis was carried out for the roasting products. The results indicated that biomass char is obviously better than activated carbon in roasting time and manganese reduction efficiency. Roasting reduction of pyrolusite undergoes the process of MnO2→Mn2O3→Mn3O4→MnO. Manganese reduction efficiency greater than 98% was achieved when roasting temperature is 800℃, roasting time is 50 min and the dosage of biomass char is 10%. Based on the results, the reduction kinetics equation was derived, and it is confirmed that the reduction process is controlled by interface chemical reaction, and the apparent activation energy is about 43.896 kJ·mol-1. ©, 2015, Northeastern University. All right reserved.

引用

页码：1482 / 1486

页数：4

共 14 条

[1]

Su H., Wen Y., Wang F., Et al., Reductive leaching of manganese from low-grade manganese ore in H2SO4 using cane molasses as reductant, Hydrometallurgy, 93, 3-4, pp. 136-139, (2008)

[2]

Sahoo R.N., Nail P.K., Das S.C., Leaching of manganese from low-grade manganese ore using oxalic acid as reductant in sulphuric acid solution, Hydrometallurgy, 62, 3, pp. 157-163, (2001)

[3]

Hariprasad D., Dash B., Ghosh M.K., Et al., Leaching of manganese ores using sawdust as a reductant, Minerals Engineering, 20, 14, pp. 1293-1295, (2007)

[4]

Zhang X.Y., Tian X.D., Zhang D.F., Separation of silver from silver-manganese ore with cellulose as reductant, Translations of Nonferrous Metals Society of China, 16, 3, pp. 705-708, (2006)

[5]

Grimanelis D., Neou-Syngouna P., Vazarlis H., Leaching of a rich Greek manganese ore by aqueous solutions of sulphur dioxide, Hydrometallurgy, 31, 1-2, pp. 139-146, (1992)

[6]

Nayl A.A., Ismail I.M., Aly H.F., Recovery of pure MnSO4·H2O by reductive leaching of manganese from pyrolusite ore by sulfuric acid and hydrogen peroxide, International Journal of Mineral Processing, 100, 3-4, pp. 116-123, (2011)

[7]

Kholmogorov A.G., Zhyzhaev A.M., Kononov U.S., Et al., The production of manganese dioxide from manganese ores of some deposits of the Siberian region of Russia, Hydrometallurgy, 56, 1, pp. 1-11, (2000)

[8]

Lan L.Y., Laboratory study: simultaneous leaching silver-bearing low-grade manganese ore and sphalerite concentrate, Minerals Engineering, 17, 9-10, pp. 1053-1056, (2004)

[9]

Long H.Z., Chai L.Y., Qin W.Q., Galena-pyrolusite co-extraction in sodium chloride solution and its electrochemical analysis, Translations of Nonferrous Metals Society of China, 20, 5, pp. 897-902, (2010)

[10]

Zhang J.-S., Zhou G.-H., A review of manganese ore resources in China and its processing technology progress, China's Manganese Industry, 24, 1, pp. 1-5, (2006)

← 1 2 →