Digestion behavior and removal of sulfur in high-sulfur bauxite during bayer process
拜耳法高硫铝土矿的溶出行为及硫的脱除
作者: Zhanwei LiuHengwei YanWenhui MaKeqiang XieBaoqiang XuLicong Zheng
作者单位: 1State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming University of Science and Technology, Kunming 650093, China
2National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China
3Aluminum Industry Engineering Research Center of Yunnan Province, Kunming 650093, China
刊名: Minerals Engineering, 2020, Vol.149
来源数据库: Elsevier Journal
DOI: 10.1016/j.mineng.2020.106237
关键词: High-sulfur bauxiteBayer processDigestion behaviorRemoval of sulfur
英文摘要: Abstract(#br)In this paper, digestion behavior and removal of sulfur in high-sulfur bauxite during Bayer process were studied. The thermodynamic analysis shows that pyrite reacts with alkali solution to generate different valence sulfur (S 2− , S 2 O 3 2− , SO 3 2− , SO 4 2− ), Fe 2 O 3 , and Fe 3 O 4 ; the standard Gibbs free energy of these reactions is negative and decreases with the increasing of temperature in range from 473 K to 573 K; the generation orders of different valence sulfur can be easily determined: S 2− > SO 4 2− > SO 3 2− > S 2 O 3 2− . The digestion experiment researches indicated that sulfur in high-sulfur bauxite entered solution mainly in the form of S 2− , the digestion rates of sulfur increased with the increase of temperature, which was consistent with our...
全文获取路径: Elsevier  (合作)
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影响因子:1.207 (2012)

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关键词翻译
关键词翻译
  • sulfur 
  • removal 消去
  • Digestion 消化
  • bauxite 铝土矿
  • during 在的期间
  • process 过程
  • behavior 行为