四川稀土矿湿法分解工艺的固体废物分类管理探讨

Discussion on Classification Management of Solid Waste Produced in Hydrometallurgical Decomposition Process of Sichuan Rare Earth Ore

介绍了四川稀土矿湿法分解工艺过程中产生铈富集物、铁钍渣、铅渣中的钍含量,研究了铈富集物、铁钍渣、铅渣的浸出毒性,提出稀土工业固体废物的分类管理应坚持废物最小化、资源化的原则,钍可作为资源利用。建议将稀土工业固体废物分为三类:即第I类一般工业固体废物或第II类一般工业固体废物、危险废物和放射性固体废物。

This paper introduces the thorium content contained in the cerium enrichment, iron thorium slag and lead slag which are produced in Sichuan rare earth ore hydrometallurgical decomposition process, reserches the toxicity of leaching cerium enrichment, iron thorium slag and lead slag, and pro- poses that classification management of rare earth industrial solid waste should adhere waste minimization, recycling resource recovery and thorium can be used as resources, and proposes that the rare earth indus- trial solid waste would be divided into three categories： Class Ⅰ General Industrial Waste or Class II gen- eral industrial solid waste and class Ⅲ hazardous waste, and Radioactive solid waste.