摘要
针对攀枝花钒钛磁铁矿选钛尾矿和钛白废酸中富含钪元素,以钛白废酸和工业硫酸为混合浸出剂,采用酸法对尾矿进行钪的浸出条件试验研究。选钛尾矿和钛白废酸的ICP检测表明,钛白废酸含Sc3+为11.63 mg·L^(-1),选钛尾矿含Sc2O3为51.01 g·t^(-1)。探讨了酸的种类、酸的浓度、酸浸温度、酸浸时间以及固液比对钪的浸出率的影响。试验结果表明,细度为-180目到+250目,碱矿比为0.6,焙烧温度为700℃,焙烧时间4 h为最佳焙烧条件,焙烧剂为NaHCO_(3)、Na_(2)CO_(3)和NaOH配比6∶1∶1;混合浸出剂为工业H2SO4,钛白废酸和HF配比为6∶8∶1,浸出温度为70℃,浸出时间2 h,搅拌速度为180 r·min^(-1),固液比1∶7时钪的浸出率可达72.68%。以废治废,达到对钪的高效回收效果,为攀枝花钒钛磁铁矿中稀贵金属综合回收提供基础支持。
Using vanadium-taitanium magnetite tailings and titanium white waste acid with scandium as raw materials,and using the mixed-acid of titanium white waste acid and sulfuric acid as the leaching agent,the experiments of leaching scandium from tailings were done through the acid-leaching method.According to the ICP test,vanadium-taitanium magnetite tailings contain Sc2O351.01 g·t^(-1),and titanium white waste acid contains Sc3+11.63 mg·L^(-1).The effects of various factors on the leaching efficiency of scandium were discussed,including acid sort,acid concentration,acid-leaching temperature,acid-leaching time and solid-liquid ratio.The results show that the fineness of raw material is-100~250 mesh,alkaline-ore ratio is 0.8,calcination temperature is 700℃,calcination time is 4 h,roasting agent is a mixed flux of NaHCO_(3),Na_(2)CO_(3)and NaOH(6∶1∶1),leaching agent is a mixed solution of industrial H2SO4,titanium white waste acid and HF(6∶8∶1),leaching temperature is 70℃,leaching time is 4 h,stiring speed is 180 r·min^(-1),solid-liquid ratio is 1∶7,and the leaching rate of scandium can reach 72.68%.By treating waste with waste to achieve effective recovery of scandium,this study provides a foundation for comprehensive recovery of rare and noble metals from Panxi vanadium-titanium magnetite.
作者
王录锋
张高庆
闫月娥
李国伟
WANG Lu-feng;ZHANG Gao-qing;YAN Yue-e;LI Guo-wei(College of Vanadium and Titanium,Panzhihua University,Panzhihua 617000,China;Vanadium&Titanium Resources Comprehensive Utilization Key Laboratory of Sichuan Province,Panzhihua 617000,China;National Quality Supervision and Testing Center of Vanadium and Titanium Products,Panzhihua 617000,China)
出处
《稀土》
EI
CAS
CSCD
北大核心
2021年第2期94-101,共8页
Chinese Rare Earths
基金
四川省科技计划项目(2019YFG0276)
攀枝花市科技计划项目(2020CY-G-6)
攀枝花市平台建设项目(20180816)
2017级校级项目(035000861)。
关键词
钪
钛尾矿
浸出
焙烧
scandium
titanium tailings
leaching
roasting
