Effect of sodium oleate on inhibiting pyrite oxidation

被引：39
作者：
Jiang, CL
Wang, XH
Parekh, BK
机构：
[1] Univ Kentucky, Ctr Appl Energy Res, Lexington, KY 40511 USA
[2] Enzymat Deinking Technol, Norcross, GA 30093 USA
来源：
INTERNATIONAL JOURNAL OF MINERAL PROCESSING | 2000年 / 58卷 / 1-4期
关键词：
pyrite; oxidation; acid formation; sodium oleate; surface coating; hydrophobic coating;
D O I：
10.1016/S0301-7516(99)00045-9
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The oxidation and acid production behavior of both ore and coal pyrites with and without a hydrophobic surface coating of sodium oleate was investigated. The results showed that pyrite surface was passivated by sodium oleate coating, which substantially reduced or even eliminated moist air oxidation. Without the hydrophobic surface coating, coal pyrite displayed higher oxidation and acid production rate than ore pyrite. It was also found that the acid production by pyrite in aqueous solution obeys a zeroth order dissolution reaction with respect to hydrogen ions. The nature of the surface coating was characterized by electrochemical, contact angle and zeta potential measurements. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：305 / 318
页数：14
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