Strategies for Reducing Impurities in Coal Gas Fuel for Alumina Calcination

摘要：

　　Purity is one of the most critical alumina quality parameters, and the various impurity species are often subject to stringent limits.The last step in the Bayer process, calcination, is seldom associated with alumina contamination, apart from the minor pick-up of silica and iron due to erosion of calciner internals.However, when operating a calciner on coal gasification derived gaseous fuel, the alumina purity may be compromised with consequences for the smelter performance and ultimately the metal premium.In this paper the impacts of alumina impurities on the smelting process and strategies for mitigating and reducing the impurities introduced with coal gas are addressed from a calciner perspective.

关键词： alumina calcination coal gasification impurities

作者: Linus Perander Cornelis Klett Andreas Koschnick

作者单位: Outotec, Germany Outotec, Australia

会议类型: 国际会议

会议名称: 32th International Conference & Exhibition ICSOBA-2014(第32届国际铝土矿、氧化铝和铝工业技术学术年会)

会议地点: 郑州

会议语种:英文

页码: 291-298

在线出版日期: 2014-10-12（万方平台首次上网日期，不代表论文的发表时间）