高硫铝土矿的焙烧预处理

›› 2008, Vol. 8 ›› Issue (5): 892-896.

高硫铝土矿的焙烧预处理

吕国志张廷安鲍丽豆志河张伟光

东北大学材料与冶金学院东北大学材料与冶金学院东北大学材料与冶金学院东北大学材料与冶金学院

收稿日期:2008-05-30 修回日期:2008-08-21 出版日期:2008-10-20 发布日期:2008-10-20
通讯作者: 张廷安

Roasting Pretreatment of High-sulfur Bauxite

LU guo-zhi ZHANG Ting-an BAO Li DOU Zhi-he ZHANG Wei-guang

School of Materials and Metallurgy, Northeastern University School of Materials & Metallurgy，Northeastern University Shenyang School of Materials & Metallurgy，Northeastern University Shenyang

Received:2008-05-30 Revised:2008-08-21 Online:2008-10-20 Published:2008-10-20
Contact: ZHANG Ting-an

摘要/Abstract

摘要： 采用回转窑对我国高硫铝土矿进行焙烧预处理，考察了焙烧温度、焙烧时间对矿物中硫含量及氧化铝溶出性能的影响，利用SEM和XRD技术对焙烧矿的微观形貌、晶型结构变化进行了分析，并对高硫矿脱硫机理和焙烧机理作了探讨. 结果表明，焙烧脱硫处理高硫型铝土矿是可行的，焙烧温度为750℃、焙烧时间为60 min时，焙烧矿中硫含量低于0.7%，达到我国氧化铝生产的工业要求；焙烧矿在溶出温度220℃、溶出时间60 min的条件下，氧化铝溶出率达到97%以上.

关键词: 高硫铝土矿, 回转窑焙烧, 脱硫, 溶出性能

Abstract: Roasting pretreatment of high sulfur bauxite was studied using a rotary kiln, and the effects of roasting temperature and roasting time on sulfur content and digestion performance of high sulfur bauxite were examined. Changes of microscopic appearance and crystal structure were analyzed with SEM and XRD techniques. The mechanism of desulphurization and roasting pretreatment was also studied. The experimental results indicate that the sulfur in bauxite was successfully discharged as gas form through roasting, the sulfur content of high sulfur bauxite met the industrial standard under the conditions of 750℃ roasting temperature and 60 min holding time. The digestion rate of alumina was above 97% under the conditions of 220℃ digestion temperature and 60 min holding time.

Key words: high-sulfur bauxite, roasting, desulphurization, digestion performance

中图分类号:

TF803.21

吕国志张廷安鲍丽豆志河张伟光. 高硫铝土矿的焙烧预处理[J]. , 2008, 8(5): 892-896.

LU guo-zhi ZHANG Ting-an BAO Li DOU Zhi-he ZHANG Wei-guang. Roasting Pretreatment of High-sulfur Bauxite[J]. , 2008, 8(5): 892-896.

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