Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 25    No. 2    February 2015

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Interaction of sulfur with iron compounds in sodium aluminate solutions
Xiao-bin LI, Chong-yang LI, Zhi-hong PENG, Gui-hua LIU, Qiu-sheng ZHOU, Tian-gui QI

National Engineering Laboratory for Efficient Utilization of Refractory Nonferrous Metals Resources,
Central South University, Changsha 410083, China

Abstract:Reaction behaviors of sulfur and iron compounds in sodium aluminate solutions were investigated. The results show that iron compounds can remarkably remove the S2- but cannot get rid of and in sodium aluminate solutions. The removal efficiency of S2- using ferrous compound and ferric compound can reach 86.10% and 92.70% respectively when the iron compounds were added with a molar ratio of 2:1 compared with the sulfur in liquors at 100 °C. Moreover, several same compounds are formed in those two desulfurization processes with ferrous or ferric compounds, including erdite, hematite, amorphous ferrous sulfide, polymerized sulfur-iron compounds and ferric sulfate. The major difference between these two processes is that the erdite generated from ferrous compounds at the initial reaction stage will convert to a sodium-free product FeS2 at the subsequent stage.


Key words: high-sulfur bauxite; sodium aluminate; iron compounds; desulfurization; mechanism

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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