某难处理铀矿石堆浸及黄饼沉淀工艺的改进  

Improvements on heap leaching process for a refractory uranium ore and yellow cake precipitation process

作　　者：冯建科 

机构地区：[1]西安中核蓝天铀业有限公司,西安710500

出　　处：《铀矿冶》2013年第4期173-176,共4页Uranium Mining and Metallurgy

摘　　要：用堆浸工艺从某难处理铀矿石中提取铀的生产过程中遇到如堆浸矿堆板结、渗透性差等问题。通过采取低酸淋浸新矿堆、串堆淋浸和翻堆等措施,有效改善了浸出条件;采用浆体循环与陈化沉淀工艺,使沉淀的铀浓缩物由无定型凝胶体或微晶转化成易沉降过滤的粗晶体,有效解决了黄饼产品铀质量分数低、水分高的问题,取得了良好的经济效益。Some problems such as formed harden matrix, ore heap compaction, poor permeability, and agglomeration of absorption resin occur during extracting uranium from a refractory uranium ore by heap leaching process. After some measures were taken, i.e. spraying a new ore heap by low concentration acid, two or more ore heaps in series leaching, turning ores in ore heap, the permeability was improved, acid consumption was reduced. Through precipitate circulation and aging, the yellow cake slurry in amorphous or microlite form was transformed to crystal precipitate, thus uranium content in yellow cake was improved, and water content in yellow cake was lowered with good economic bene-fits.

关 键 词：堆浸 矿堆板结 黄饼 浆体循环与陈化沉淀 

分 类 号：TL212.12[核科学技术—核燃料循环与材料]