草酸盐控制析出技术在进口矿生产氧化铝中的应用  

Application of oxalate controlled precipitation technology to alumina production from imported bauxite

作　　者：左林举 石川 Zuo Linju;Shi Chuan(Zhongzhou Aluminum Co.,Ltd.of CHALCO,Jiaozuo 454174,China)

机构地区：[1]中铝中州铝业有限公司,河南焦作454174

出　　处：《轻金属》2024年第7期7-13,共7页Light Metals

摘　　要：在低温拜耳法高浓度一段分解生产氧化铝过程中,流程内草酸盐持续积累至饱和析出对种分过程控制和产品质量影响较大。本文研究了在低温拜耳法高浓度晶种分解过程中晶种的草酸盐含量变化对成核的影响,创新性使用草酸盐控制剂(OCA)来促进草酸盐在种分系统内独立成球析出,以此消除草酸盐含量高对生产过程和产品质量的影响。研究了草酸盐控制剂在晶种分解不同周期内的作用和效果,获得了成熟的种分过程中草酸盐独立成球技术。In the process of producing alumina through high concentration one-stage precipitation using low-temperature Bayer process,the continuous accumulation of oxalate in the process until saturation precipitation has a significant impact on the control of seed precipitation process and product quality.This paper investigates the effect of changes in oxalate content of crystal seeds on nucleation during the precipitation process of high concentration crystal seeds using low-temperature Bayer process.The oxalate control agent(OCA)is innovatively used to promote the independent spherical precipitation of oxalate within the seed system,thereby eliminating the impact of high oxalate content on the production process and product quality.We studied the function and effects of oxalate control agents on different cycles of seed precipitation,and obtained a mature technology for oxalate independent balling during the seed precipitation process.

关 键 词：晶种分解 进口矿 草酸盐 种分过程 低温拜耳法 氧化铝 控制剂 一段分解 

分 类 号：TF821[冶金工程—有色金属冶金]