自然科学版 英文版
自然科学版 英文版
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中南大学学报(英文版)

Journal of Central South University

Vol. 22    No. 8    August 2015

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pH variation mechanism of high sulfur-containing bauxite
CHEN Xing-hua(陈兴华)1, 2, HU Yue-hua(胡岳华)1, LI Wang-xing(李旺兴)2, CHEN Xiang-qing(陈湘清)2, CAO Xue-feng(曹学锋)1

1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;
2. Aluminum Corporation of China Limited, Beijing 100082, China

Abstract:In order to fundamentally solve the acidification problem of high sulfur-containing bauxite during storage, by simulating the environment of minerals storage in laboratory, the acidification mechanism and influencing factors of high sulfur-containing bauxite were studied and confirmed using the single variable method to control the atmosphere, water and other variables. The results show that the acidification is mostly caused by the oxidation of sulfur-containing bauxite, which is mainly the natural oxidation of Pyrite (FeS2), then the alkaline minerals dissolute in the presence of water, leading to the acidification phenomenon, which is influenced by moisture and air flow. Finally, more acid-producing substances are formed, resulting in the acidification of high sulfur-containing bauxite. The acidification of high sulfur-containing bauxite results from the combined effect of the oxygen in the air and water, which can be significantly alleviated by controlling the diffusion of the oxygen in air.

 

Key words: high sulfur-containing bauxite; pyrite; acidification mechanism

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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