Crystal Growth Modifiers in the Bayer Process
In the Bayer process, control of alumina trihydrate particle size, oxalate stability and morphology and foaming is crucial for improving the yield and quality of alumina trihydrate. One way to economically achieve such control is to employ specifically developed chemical additives, termed,crystal growth modifiers (CGMs). In this paper, the mechanism of action and practical application of CGMs in the Bayer process are summarized. The application of CGM additives allows for both enhanced agglomeration and secondary nucleation control, and hence coarsening of the particles.Current research efforts have utilized the information gained from mechanistic studies to enhance the performance of CGM products. It was demonstrated in both laboratory tests and industrial operations that the newly developed CGM formulations have a range of properties with enhanced performance, compared to the current commercial products.
Crystal growth modifier (CGM) Bayer liquor Alumina trihydrate Oxalate Crystallization
J.J. Liu J. Counter D. Kouznetsov K.OBrien J. Kildea
Nalco Company, Naperville, USA Nalco Australia,NSW, Australia Nalco Australia, Kwinana
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3275-3282
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）