氟碳铈矿焙烧工艺对稀土浸出率的影响研究  

Research on the Influence of the Roasting Process of Bastnaesite on the Leaching Rate of Rare Earth

作　　者：顾晓明 袁红霞 柳云龙 GU Xiao-ming;YUAN Hong-xia;LIU Yun-long(China Rare Earth(Liangshan)Co.,Ltd.,Mianning 615601,China;Pangang Group Xichang Steel&Vanadium Co.,Ltd.,Xichang 615000,China;Xichang Panxin Vanadium Titanium Metal Materials Co.,Ltd.,Xichang 615000,China)

机构地区：[1]中稀(凉山)稀土有限公司,四川冕宁615601 [2]攀钢集团西昌钢钒有限公司,四川西昌615000 [3]西昌攀新钒钛金属材料有限公司,四川西昌615000

出　　处：《稀有金属与硬质合金》2025年第2期9-14,共6页Rare Metals and Cemented Carbides

基　　金：四川省科技支撑计划——攀西战略资源创新开发专项资金项目(0674-154PTCFJT203/01-F)。

摘　　要：以牦牛坪氟碳铈精矿为原料,研究了精矿粒度、焙烧温度、焙烧时间和料层厚度等焙烧工艺参数对熟矿氧化率、铈富集物的镨钕含量以及稀土浸出率的影响。结果表明,采用较小的精矿粒度、适宜的焙烧温度(500~525℃)和焙烧时间(3 h)并控制料层厚度(1.1 cm)可提高镨钕浸出率,降低铈富集物中的镨钕含量。但由于破碎精矿需要额外增加工序及能耗,为了使工业生产容易实现,采用原始精矿直接焙烧。在上述最佳条件下,熟矿氧化率可达到95.29%,镨钕浸出率达到95.89%,铈富集物的镨钕含量达到最低,为1.23%。本研究可为氟碳铈矿中镨钕的高效浸出提供参考。The effects of roasting process parameters such as concentrate particle size,roasting temperature,roasting time,and material layer thickness on the oxidation rate of roasted ore,praseodymium and neody-mium content in the cerium-rich concentrates,and leaching rate of rare earths,using Yakping bastnaesite concentrate as the raw material.The results indicate that employing smaller concentrate particle size,appropriate roasting temperature(500~525℃)and roasting time(3 h),and controlled material layer thickness(1.1 cm),could enhance the leaching rate of praseodymium and neodymium and reduce the praseodymium and neodymium content in the cerium-rich concentrates.However,due to the additional processing steps and energy consumption required for crushing concentrates,the original concentrate is directly roasted for easier industrial implementation.Under the above optimum conditions,the oxidation rate of roasted ore reaches 95.29%,the leaching rate of praseodymium and neodymium reaches 95.89%,and the praseodymium and neodymium content in the cerium-rich concentrates is minimized to 1.23%.This study provides a reference for achieving efficient praseodymium and neodymium leaching from bastnaesite.

关 键 词：氟碳铈矿 镨钕浸出率 熟矿氧化率 精矿粒度 焙烧温度 焙烧时间 料层厚度 

分 类 号：TF845.6[冶金工程—有色金属冶金]