X-RAY PHOTOELECTRON SPECTROSCOPIC STUDY OF THE INTERACTION OF XANTHATE WITH COAL PYRITE AND MINERAL PYRITE SURFACES

被引：13

作者：

KHAN, SUM ^{[1
]}

BALTRUS, JP ^{[1
]}

LAI, RW ^{[1
]}

RICHARDSON, AG ^{[1
]}

机构：

[1] US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236

来源：

APPLIED SURFACE SCIENCE | 1991年 / 47卷 / 04期

关键词：

D O I：

10.1016/0169-4332(91)90088-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Coal pyrite and mineral pyrite surfaces were examined by X-ray photoelectron spectroscopy (XPS) before and after treatment in acidic and basic solutions of sodium ethyl xanthate (NaEtX). XPS showed that the degree of oxidation of coal and mineral pyrite surfaces increased when these pyrites were conditioned in basic solutions. However, conditioning in acidic solutions led to partial removal of surface oxidation from the pyrites. Addition of NaEtX to the acidic and basic solutions enhanced the removal of oxidation from pyrite surfaces. Pretreatment with sulfur dioxide further enhanced the removal of surface oxidation in the presence of NaEtX. Surface oxidation was typically less on mineral pyrite than coal pyrite surfaces following identical treatments. The flotation recoveries of the pyrites in the presence of NaEtX are greatest for the pyrites with the least amount of surface oxidation.

引用

页码：355 / 363

页数：9

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