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Separation and recovery of scandium and titanium from red mud leaching liquor through a neutralization precipitation-acid leaching approach
Journal of Rare Earths ( IF 4.9 ) Pub Date : 2020-08-06 , DOI: 10.1016/j.jre.2020.07.030
Qingyuan Lei , Dewen He , Kanggen Zhou , Xuekai Zhang , Changhong Peng , Wei Chen

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 condition, 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.



中文翻译:

中和沉淀-酸浸法从赤泥浸出液中分离回收钪和钛

赤泥浸出液中钪和钛的选择性回收是通过中和沉淀后酸浸的方法实现的。在中和沉淀部分,研究了pH、温度和反应时间对金属沉淀效率的影响。在最佳条件下,钪和钛的析出率分别为93.74%和99.47%。在酸浸段,考察了酸度、温度、反应时间和萃余酸溶液比对浸出效率的影响。在最佳条件下,钪和钛的浸出率分别为99.97%和5.44%。钪和钛的损失分别为 6.3% 和 5.9%。与传统的赤泥中钪提取工艺相比,

更新日期:2020-08-06
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