有色金属科学与工程2016，Vol.7Issue(6)：129-135,7.DOI:10.13264/j.cnki.ysjskx.2016.06.022
碱熔预处理对废旧稀土荧光粉中稀土提取的影响
Effect of alkaline fusion pretreatment on extraction rate of rare earth from waste rare earth fluorescent powder
摘要
Abstract
The method of combining high-temperature alkaline fusion and acid leaching was used to pre-treat waste rare earth fluorescent powder according to its characters to investigate the effect of alkaline fusion temperature, sodium hydroxide dosage and alkaline fusion time on rare earth extraction rate and aluminum deprivation rate, and to analyze the phase structure and surface morphology during the process of alkaline fusion. The results show that alkaline fusion can be achieved at temperature of 1 050 ℃ for 2 h when the mass of the ratio of sodium hydroxide to waste rare earth fluorescent is 2.5∶1 with the leaching rate of the total rare earth more than 98 %, and aluminum deprivation rate being 98 %. The phase and morphology analysis of the alkaline fusion indicates that the structure of waste crystal structure is destroyed effectively, rare earth is in form of rare earth oxide, and alkaline fusion product becomes amorphous cotton-like.关键词
废旧稀土荧光粉/碱熔/预处理/提取/稀土浸出率Key words
waste rare earth fluorescent powder/alkaline fusion/pretreatment/extraction/the leaching rate of rare earth分类
矿业与冶金引用本文复制引用
张兆雪,王瑞祥,熊家春,温功玉,廖根,谢博毅..碱熔预处理对废旧稀土荧光粉中稀土提取的影响[J].有色金属科学与工程,2016,7(6):129-135,7.基金项目
国家自然科学基金资助项目（51564021、51164011）；国家稀土综合试点项目（财政部财建[2013]559号）；江西省科技落地计划项目（KJLD13041）；江西省科技支撑项目（20141BBG70004）；江西省研究生创新基金项目 （）
