贵港式铝土矿综合利用工艺研究  

Study on the comprehensive utilization technology of bauxite of Guigang

作　　者：陈怀杰[1] 刘志强[1] 朱薇[1] 郭秋松[1] 

机构地区：[1]广东省工业技术研究院(广州有色金属研究院),广东广州510650

出　　处：《材料研究与应用》2012年第1期65-68,共4页Materials Research and Application

基　　金：国家自然科学基金(60776062;50730009)资助课题

摘　　要：针对我国贵港等地高铁铝土矿的特点,提出了全新的"同时提铁铝"综合利用工艺,即在中高温还原铁的同时,使铝形成铝酸钠,将还原焙烧料湿磨浸出氧化铝后,再进行磁选选铁.按原矿量75 g,钙硅比2.0,碱比1.1,w(C)=10%的配比混料、造球,在1100℃下进行还原焙烧.试验结果:铝的浸出率80.2%,硅量指数55,铁精矿品位55.2%,铁的回收率92.4%.采用该工艺可使铁、铝资源得到充分利用,并且工艺简单、设备投资少,具有很好的应用前景.A new comprehensive utilization technology＂epurating Fe and Al at the same time＂was put forward according to the characteristics of the bauxite of Guigang,in which the iron content was high.During the reduction process of iron at middle-high temperature,the aluminum was turned into sodium aluminates.Alumina was obtained from the reduction calcinating material by wet leaching,and then the iron was selected by magnetic separation.The 75g ore was mixed and pelletized with the Ca/Si ratio 2.0,alkali ratio 1.1 and w（C） 10%,and then roasted at 1100 ℃ under reduction atmosphere.The results of the experiment were： the leaching rate of Al was 80.2%,the siliceous modulus 55,the iron concentrate grade 55.2% and the recovery rate of iron 92.4%.The iron and aluminum resources were fully utilized in this process,which was simple and needed little investment in equipment,presenting good application prospect.

关 键 词：贵港式铝土矿 三水铝土矿 氧化铝 铁 

分 类 号：TF111[冶金工程—冶金物理化学] TF821