Separation and recovery of scandium and titanium from red mud leaching liquor through a neutralization precipitation-acid leaching approach  

作　　者：Qingyuan Lei Dewen He Kanggen Zhou Xuekai Zhang Changhong Peng Wei Chen 

机构地区：[1]School of Metallurgy and Environment.Central South University,Changsha 410083,China

出　　处：《Journal of Rare Earths》2021年第9期1126-1132,共7页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(21707167)。

摘　　要：Selective recovery of scandium and titanium from red mud leaching solution was achieved through neutralization precipitation followed by acid leaching approach.In the neutralization precipitation section,the effects of pH,temperature and reaction time on metal precipitation efficiency were investigated.Under the optimal co ndition,the precipitation efficiencies of scandium and titanium were 93.74%and 99.47%,respectively.In the acid leaching section,the effects of acidity,temperature,reaction time,and raffinate to acid solution ratio on leaching efficiency were investigated.Under the optimal condition,the leaching efficiencies of scandium and titanium were 99.97%and 5.44%,respectively.The loss of scandium and titanium were 6.3%and 5.9%,respectively.Compared with the traditional extraction procedure of scandium in red mud,this method could separate titanium from scandium effectively,which is beneficial for the purification of the products and improvement of value of the metal.

关 键 词：Red mud SCANDIUM Titanium Neutralization precipitation Acid leaching Rare earths 

分 类 号：X758[环境科学与工程—环境工程] TF845.1[冶金工程—有色金属冶金] TF823