【作者】 于秀兰； 郎晓川； 张丽清； 王之昌；

【Author】 YU Xiu-lan~1,LANG Xiao-chuan~1,ZHANG li-qin~1,WANG Zhi-chang~2 1.Shenyang Institute Of Chemical Technology,Shenyang 110142,China; 2.Northeastern University,Shenyang 110004,China)

【机构】 沈阳化工大学； 东北大学理学院；

【摘要】 研究了包钢选矿厂尾矿经Na₂CO₃焙烧,加硝酸浸取提取稀土的反应原理和工艺。考察了Na₂CO₃和焙烧温度对尾矿中稀土、铌和钍浸取率的影响。结果表明:700℃Na₂CO₃焙烧脱氟后采用硝酸浸取,稀土浸取率高达93.2%,钍浸取率为62.0%,铌的浸取率仅为20.0%。更多还原

【Abstract】 A reaction principle and technology of Na₂CO₃ roasting- HNO₃ leaching was investigated for extracting rare earths,niobium and thorium from the Baotou Steel’s tailings.The effects of Na₂CO₃ and roasting temperature on leaching rate of rare earth,niobium and thorium were studied.The results show that roasting the tailings at 700℃with Na₂CO₃,and leaching the calcine with HNO₃ the leaching rate of rare earth, thorium and niobium were 93.2%,62.0%and 20.0%respectively.更多还原