Method for efficiently recovering rare earth elements from waste mixed rare earth phosphors

The invention discloses a method for efficiently recovering rare earth elements from waste mixed rare earth phosphors. Through the process steps of low-temperature reduction roasting, water leaching impurity removal, rare earth-containing filtrate purification and aluminum removal and purified liquor rare earth deposition and recovery, the waste mixed rare earth phosphors is treated through the mode that a pyrogenic process and a wet process are combined. Efficient removal of impurity elements such as aluminum, silicon and barium in the waste mixed rare earth phosphors and efficient recovery of Y, Eu, Tb and Ce are achieved. The method is a treatment method which is environmentally friendly, simple in process, high in resource comprehensive recovery rate and low in energy consumption. The problem of difficult recovery of green powder and blue powder in rare earth phosphors is solved, and the high economic value is achieved. 本发明公开了种废旧混合稀土荧光粉高效回收稀土元素的方法，通过低温还原焙烧、水浸除杂、含稀土滤液净化除铝、净化液稀土沉淀回收的工艺步骤，采用火法与湿法相结合的方式处理废旧混合