稀土荧光粉广泛用于信息显示、照明光源、光电器件等领域。随着节能灯的日益推广和普及，各类荧光粉用量不断增加，与之相应的荧光粉废料也就不断涌现。稀土是极为重要的战略物质，在当前我国加强稀土资源保护和综合利用，国家对稀土产品实行指令性计划管理和市场应用需求持续稳定增长形势下，从含稀土的荧光粉废料中回收稀土具有特别重要意义。针对现有处理荧光粉废料稀土技术存在回收率低、工艺复杂等缺点，我们采用选择性氧化还原法回收稀土，为明晰过程作用机理和反应的热力学、动力学等，本项目对选择性氧化还原法从荧光粉废料中回收稀土的基础进行研究，包括荧光粉废料氧化焙烧进行物相重构热力学及赋存状态，焙烧产物浸取动力学，浸出液非稀土杂质行为与去除机制，稀土萃取分离过程中不同体系下萃取平衡的重要技术参数（如分配比、分离系数等）和分离特性研究等。旨在对选择性氧化还原法从荧光粉废料回收稀土提供理论和技术指导。

Rare earth phosphor is widely used in many fields such as information display,illumination and optoelectronic devices.With the increasing popularization of energy saving lamps and usage amount of phosphor, phosphor sludge springs up accordingly. Rare earth is the extremely important strategic material. In the situation of enhancing conservation and comprehensive utilization of rare earth, implementing mandatory planning management,and sustainedly stably growing of market application demand. It is significant to recover rare earth from phosphor sludge. According to technnique has drawbacks of low separation and recovery of rare earth elements, complicated craftwork, etc.The project takes method of selective oxidation and reduction. In order to clear process and reaction mechanism, kinetics and thermodynamics, the project studies recovering rare earth from phosphor sludge by selective oxidation and reduction, including the following base studies: oxidation roast phosphor sludge to be the phase reconstruction of thermodynamics and occurrence state,leaching kinetics of calcined products, non rare earth impurities behavior of the leaching solution and removal mechanism, the important technical parameters of extraction equilibrium under different system in the process of extraction and separation of rare earth, separation characteristics research and so on. The project aims to provide theoretical and technical guidance to using selective oxidation and reduction to recover rare earth from phosphor sludge.