拜耳法赤泥中氧化铝回收方法研究与应用  

Study and Application on Recycling Method of Alumina from Bayer Red Mud

作　　者：陈映 赵加平 王红光 卞磊 CHEN Ying;ZHAO Jia-ping;WANG Hong-guang;BIAN Lei(Yunnan Wenshan Aluminum Co.,Ltd.,Wenshan,Yunnan 663000,China)

机构地区：[1]云南文山铝业有限公司,云南文山663000

出　　处：《云南冶金》2022年第2期91-95,共5页Yunnan Metallurgy

摘　　要：拜耳法氧化铝赤泥中还含有20%左右的氧化铝,传统的方法是将拜耳法的赤泥当做烧结法的原料,回收赤泥中的氧化铝。由于烧结逐渐被淘汰,赤泥中的氧化铝也得不到回收。研究并应用了利用赤泥粒度分级、粗粒度赤泥返回流程溶出的方法将拜耳法赤泥中的氧化铝部分回收回来,具有工艺简单、成本低的特点,有效降低外排赤泥氧化铝含量。Bayer red mud contains about 20%alumina,it was used as the raw material of sintering method in order to recycling alumina in red mud.But the alumina in red mud can not be recycled any more due to the sintering method was gradually eliminated.Therefore we studied the recycling method of alumina,partial alumina shall be recycling by utilization of size grading of red mud,the coarse-grained red mud shall be returned back to the process for dissolution,the process is simple and the costs are low,it can effectively decrease the alumina content in discharged red mud.

关 键 词：赤泥 氧化铝 拜耳法 铝硅比 

分 类 号：TF821[冶金工程—有色金属冶金]