Recovery of scandium from silicate minerals by high-pressure leaching in sulfuric acid

作     者：Peng Yan Xiaoming Chen Likun Gao Bo Yang Peng Yan;Xiaoming Chen;Likun Gao;Bo Yang

作者机构：Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming650093China Faculty of Land Resources EngineeringKunming University of Science and TechnologyKunming650093China School of Chemistry and Chemical EngineeringKunming UniversityKunming650214China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2024年第42卷第7期

页      面：1375-1384,I0007页

核心收录：

学科分类：080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 0703[理学-化学] 

基　　金：Project supported by Yunnan Province Basic Research Program(202101AT070141) 

主　　题：Silicate minerals Scandium High-pressure Leaching Concentrated sulfuric acid Rare earths 

摘      要：This study investigated the leaching of scandium from a Sc-bearing silicate *** Sc concentrate obtained by beneficiation pre-enrichment has 1.03×10^(−4) wt%Sc and 14.66 wt%*** main Sc-bearing minerals are limonite,chlorite,sericite,and hornblende,in the form of ***-pressure leaching(HPL)with sulfuric acid(98 wt%)and NaF was used to dispose this *** Sc leaching efficiency of 91.82%was obtained under the optimum conditions,which are pressure of 5.0×10^(5) Pa,A/O value of 1.1,L/S value of 1.8,NaF dosage of 2 wt%,at 130℃ for 6 *** X-ray diffraction(XRD)and scanning electron microscopy(SEM)results show that the residue is mainly quartz phase in the multihole *** with ordinary leaching for silicate,high-pressure leaching has significant advantages in saving acid and energy consumption.