高硫铝土矿流化焙烧脱硫及对溶出性能的影响  

Desulphurization of High Sulphur Bauxite by Fluosolid Roasting and Its Effect on the Digestion Performance

作　　者：吕国志[1] 张廷安[1] 鲍丽[1] 张伟光[1] 豆志河[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《矿冶工程》2008年第6期58-61,共4页Mining and Metallurgical Engineering

基　　金：国家自然科学基金资助项目(50644016;50704011);国家973项目(2007CB13504);教育部高校博士点基金项目(20050145029);辽宁省优秀青年科技人才基金项目(2005221012)

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的影响以及对矿物溶出性能的影响。并对高硫矿脱硫机理和焙烧机理作了进一步的探讨。实验结果表明,通过焙烧的方法,铝土矿中的硫元素可以成功的以气体形态排出,在焙烧温度为700℃,焙烧时间为30 min条件下高硫铝土矿中硫含量达到我国氧化铝生产的工业要求(<0.7%),焙烧矿经过流化焙烧预处理,溶出性能大为改善,具体表现为:溶出温度由240℃下降至220℃,最佳配料分子比从1.5下降至1.3。High sulfur bauxite was roasting pretreated with rotary kiln and the effects of roasting temperature and time on sulfur content and digestion performance of high sulfur bauxite were investigated. Further studies on desulphurization mechanism and roasting mechanism of high sulfur mineral were conducted. The experimental results indicated that sulfur element in bauxite was successfully discharged in gas form and the sulfur content of high sulfur bauxite achieved the industrial standard（ 〈0.7% ） of alumina production in china under the conditions of roasting temperature 700℃ and roasting time 30 min. The digestion performance of roasted ore through fluosolid roasting pretreatment improved greatly： the digestion temperature decreased from 240 ℃ to 220 ℃, and the optimum mixture molecular ratio decreased from 1.5 to 1.3.

关 键 词：高硫铝土矿 回转窑焙烧 脱硫 溶出性能 

分 类 号：TF111[冶金工程—冶金物理化学]