摘要
利用印尼铝土矿溶出废弃赤泥,配入自制添加剂,采用煤基直接还原焙烧-渣铁磁选分离-冷固成型的新工艺流程,通过X-ray,SEM-EDS手段,研究了印尼铝土矿溶出废弃赤泥煤基直接还原过程中金属铁晶粒长大特性,并着重讨论了添加剂种类、焙烧条件对金属铁晶粒长大特性的影响。生产出优质海绵铁,其金属化率为92.9%,铁品位为93.7%,铁回收率为94.42%,为氧化铝工业废弃赤泥综合利用提供了一条新途径。
Using the dissolved obsolete red mud of Indonesian bauxite ore,adding the self-made additives,adopting the new technological flowsheet of coal-based direct reduction roasting — magnetic separation of iron slag — cold bond agglomeration and by the way of X-ray and SEM-EDS,the characteristics of metal iron grain growth in the course of direct reduction was studied and more emphasis was put on effects of additive types and roasting conditions on the characteristics of metal iron grain growth.Finally,the high-quality sponge iron with the metallization rate of 92.9%,iron content of 93.7% and iron recovery of 94.42% was obtained.This new technology will exploit a new way for comprehensive utilization of obsolete red mud in alumina industry.
出处
《矿产综合利用》
CAS
2011年第2期37-40,共4页
Multipurpose Utilization of Mineral Resources
基金
中国铝业公司重点科研项目(SA2006CAQD03)
关键词
赤泥
直接还原
添加剂
烧结
Red mud
Direct reduction
Additives
Sintering temperature
Sintering time
