氢氧化铝低温焙烧技术研究  

Study on low-temperature calcination technology of aluminum hydroxide

作　　者：曹万秋[1] 尹德明[1] 汪漪[1] Cao Wanqiu;Yin Deming;Wang Yi(Shenyang Aluminum&Magnesium Engineering&Research Institute Co.,Ltd.,Shenyang 110001,China)

机构地区：[1]沈阳铝镁设计研究院有限公司,辽宁沈阳110001

出　　处：《轻金属》2024年第6期12-16,共5页Light Metals

摘　　要：氢氧化铝焙烧是氧化铝生产中最后一道工序,能耗约占整个氧化铝厂能源消耗的30%左右,如何降低单位产品能源消耗对于降低运营成本和减少碳及其他污染物排放意义重大。本文通过对气态悬浮焙烧炉理论和现场应用情况的研究分析,重点研究了灼减(LOI)、失重率、颗粒直径、停留时间等与焙烧温度的关系,提出了在气态悬浮焙烧的基础上进一步降低焙烧温度,进而降低单位产品能耗,减少二氧化碳和氮氧化物排放的新型低温焙烧技术。Alumina hydroxide calcination is the last process in alumina production,whose energy consumption accounts for about 30%of the alumina refinery's entire energy consumption.How to reduce energy consumption per unit product is of great significance for cutting down operating costs,carbon and other pollutant emissions.Based on the research and analysis of the theory and field application of the gas suspension calcinator,this paper focuses on the relationship between the loss on ignition(LOI),weight loss rate,particle diameter,residence time and the calcination temperature,and puts forward a new low-temperature calcination technology to further reduce the calcination temperature on the basis of gas suspension calcination,thereby reducing the energy consumption per unit product as well as the emission of carbon dioxide and nitrogen oxides.

关 键 词：焙烧炉 低温焙烧 灼减 颗粒直径 停留时间 

分 类 号：TF806[冶金工程—有色金属冶金]