DRIFT SPECTROSCOPIC STUDY OF THE MECHANISM OF SELECTIVE SHEAR-FLOCCULATION OF HEMATITE FROM KAOLINITE

被引：0
|
作者：
龚文琪 [1 ]
机构：
[1] Wuhan Univereity of Technology
来源：
Journal of Wuhan University of Technology-Materials Science | 1997年 / Z1期
关键词：
DRIFT study; shear-flocculation; chemisorption; physical adsorption; oleate; hematite; kaolinite;
D O I：
暂无
中图分类号：
TD952 [有色金属矿选矿];
学科分类号：
摘要：
The mechanism of separating hematite from kaolinite by shear-flocculation and the reason responsible for the selectivity of shear-flocculation was studied by using diffuse reflectance infrared Fourier transform (DRIFT) spec-troscopy, which was found to be effective for analysing adsorbed oleate species on the highly absorbing mineral hematite. The spectra suggest that chemisorption of oleate on hematite took place under shear-flocculation condition and that the chemisorbed species was bridged bidentate, corresponding to a peak at 1580 cm-1. Dimers of oleic acid, corre-
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页码：83 / 93
页数：11
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