结晶助剂在拜耳法种分分解中的应用与探讨  

Application and discussion of crystallization auxiliaries in seed decomposition of Bayer process

作　　者：程尤远 CHENG You-yuan(Guangxi Huayin Aluminum Co.,Ltd.,Debao 533700,China)

机构地区：[1]广西华银铝业有限公司,广西德保533700

出　　处：《世界有色金属》2020年第15期203-205,208,共4页World Nonferrous Metals

摘　　要：拜耳法铝酸钠溶液种分分解过程中,氢氧化铝的产量和质量是相互茅盾的一对关键指标,很多时候,要想得到高的产量,就会牺牲一定的质量,反之,要想得到质量很好的产品,就会使产量有所降低。本文根据自己多年的生产实践,结合理论,探讨通过添加结晶助剂(CGM)加强氢氧化铝细颗粒附聚,减少次生晶核数量,加快氢氧化铝颗粒的长大,缩短氢氧化铝粒度的变化周期,减小氢氧化铝-45μm百分含量的波动,稳定产品质量的同时,提高精液产出率。In the process of seed precipitation of sodium aluminate solution by Bayer process,the output and quality of aluminum hydroxide are a pair of key indicators.In many cases,if you want to get a high yield,you will sacrifice a certain quality.On the contrary,if you want to get a good quality product,you will reduce the output.In this paper,according to the author's production practice for many years and combining with the theory,this paper discusses how to strengthen the agglomeration of aluminum hydroxide fine particles,reduce the number of secondary crystal nuclei,accelerate the growth of aluminum hydroxide particles,shorten the change period of aluminum hydroxide particle size,reduce the fluctuation of aluminum hydroxide-45μm percentage content,stabilize the product quality and improve the semen yield.

关 键 词：粒度 CGM 种分分解 铝酸钠溶液 砂状氧化铝 比表面积 

分 类 号：TF821[冶金工程—有色金属冶金]