稀土高温酸法工艺放射性废渣资源性研究

发布时间：2018-05-07 17:24

本文选题：放射性 + 废渣　；参考：《稀土》2017年02期

【摘要】：对白云鄂博混合稀土精矿(REO~50%)浓硫酸高温分解工艺放射性废渣的产生过程、组成形貌、粒径分布和资源特性等进行了系统研究和鉴定分类,并对废渣蕴含的资源量及资源化开发进行了初步研究。通过研究得出,废渣富含稀土、钍、铌、磷、铁等多种有价元素,且所含的稀土较少,部分是以矿物形式存在,大部分是以包裹夹带形式存在,其中镨、钕、钆含量偏高,因此该废渣的资源储量和经济价值巨大。按照相关国家标准,废渣中α、β总比放为7.11×10~4Bq/kg左右,属于第Ⅰ级(低放废物);浸出毒性和腐蚀性符合国标要求,属于第Ⅰ类一般工业废物。在热的酸溶液中,可将废渣中各有价元素提取,为综合利用提供条件。
[Abstract]:The production process, composition, particle size distribution and resource characteristics of radioactive waste from high temperature decomposition process of concentrated sulfuric acid from Bayan Obo mixed rare earth concentrate (Reo 50) were systematically studied and classified. The amount of resources contained in the waste residue and the exploitation of the waste residue were preliminarily studied. The results show that the waste residue is rich in rare earth, thorium, niobium, phosphorus, iron and other valuable elements, and contains less rare earths, some of which are in the form of minerals, and most of them are in the form of enclosing, among which the contents of praseodymium, neodymium and gadolinium are relatively high. Therefore, the resource reserves and economic value of the waste residue are huge. According to the relevant national standards, the total ratio of 伪, 尾 in the waste residue is about 7.11 脳 10~4Bq/kg, which belongs to the first grade (low level radioactive waste), and the leaching toxicity and corrosivity are in accordance with the national standard and belong to the first class of general industrial waste. In hot acid solution, each valuable element in waste residue can be extracted, which provides conditions for comprehensive utilization.
【作者单位】：白云鄂博稀土资源研究与综合利用国家重点实验室;瑞科稀土冶金及功能材料国家工程研究中心;包头稀土研究院;北方稀土集团高科技股份有限公司;
【基金】：北方稀土(集团)公司科技开发项目(2014H1814)
【分类号】：X758

【相似文献】