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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 3    June 2003

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Preparation of solid polyferric sulfate from pyrite cinders and its structure feature
ZHENG Ya-jie(郑雅杰), GONG Zhu-qing(龚竹青),
CHEN bai-zhen(陈白珍), LIU Li-hua(刘立华)

College of Metallurgical Science and Engineering, Central South University, Changsha 410083, China

Abstract:Acid leaching solution was obtained after mixing pyrite cinders with H2SO4, then heating the mixture of pyrite cinders and H2SO4 at 200-300℃, leaching the heated mixture with water and filtrating. Polyferric sulfate (PFS) solution was produced by adding suitable amounts of FeSO4·7H2O and NaClO3 into acid leaching solution. By concentrating and drying PFS solution, solid PFS with alkali degree of 6.40%-22.4% was prepared. Fe4.67(SO4)6(OH)2·20H2O in the solid PFS was discovered by XRD analysis. FT-IR spectroscopy shows that the absorption peaks at 3400cm-1 and 1635cm-1 arise from OH and absorption peaks at 998cm-1 and 669cm-1 come from Fe—OH in the solid PFS.

 

Key words:  pyrite cinders; NaClO3 oxidation; solid polyferric sulfate; structure feature

ISSN 1672-7029
CN 43-1423/U

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