中南大学学报（英文版）
中南大學學報（英文版）
중남대학학보（영문판）
Journal of Central South University
2015年
10期
3745-3750
,共6页
刘战伟%李旺兴%马文会%尹中林%武国宝
劉戰偉%李旺興%馬文會%尹中林%武國寶
류전위%리왕흥%마문회%윤중림%무국보
high-sulfur bauxite%alumina production%desulfurization%wet oxidation
Several methods of deep desulfurization in alumina production process were studied, and the costs of these methods were compared. It is found that most of the S2? in sodium aluminate solution can be removed by adding sodium nitrate or hydrogen peroxide in digestion process, and in this way the effect of S2? on alumina product quality is eliminated. However, the removal efficiency of2-23SOin sodium aluminate solution is very low by this method. Both S2? and2-23SO in sodium aluminate solution can be removed completely by wet oxidation method in digestion process. The cost of desulfurization by wet oxidation is lower than by adding sodium nitrate or hydrogen peroxide. The results of this research reveal that wet oxidation is an economical and feasible method for the removal of sulfur in alumina production process to improve alumina quality, and provide valuable guidelines for alumina production by high-sulfur bauxite.
