摘要
为了揭示含铀煤灰的工艺矿物学特性,为研发这种非常规铀资源的高效水冶工艺提供理论依据,本文采用矿物解离分析仪和扫描电子显微镜对含铀煤灰的组成、矿物性质和嵌布特征进行了研究。结果表明,含铀煤灰的矿物组成较复杂,主要矿物为蒙脱石、石英和长石,占比达83%,次要矿物为赤铁矿,铀矿物为沥青铀矿、水硅铀矿、硅钙铀矿、钙铀矿和硅酸钍矿(U)。含铀煤灰中铀矿物的粒度在75μm以下,其它矿物的粒度较大,铀矿物主要嵌布在蒙脱石、石英、长石和赤铁矿中,它们的单体解离度较低。因此为了高效开发含铀煤灰中的铀,需将其磨至75μm以下,且需研发新的铀水冶工艺。
In order to reveal the process mineralogical characteristics of uraniferous coal ash and to provide a theoretical basis for the research and development of highly efficient hydrometallurgical processing technology for this unconventional uranium resource,the compositions,mineral properties,and uranium inlay characteristics of uraniferous coal ashes have been studied by using means of mineral liberation analyser(MLA)and scanning electron microscope(SEM)in this paper.The results show that the uraniferous coal ash contains main minerals of montmorillonite,quartz,and feldspar,accounting for 83%,minor mineral of hematite,and uranium minerals of pitchblende,hydrosiliunite,uraninite,uraninite,and thorium silicate(U);The particle sizes of uranium minerals in uraniferous coal ashes are generally lower than 75μm,while those of other minerals are larger than 75μm.Uranium minerals are mainly embedded in montmorillonite,quartz,feldspar,and hematite.Their monomer dissociation degree is relatively low.Therefore,in order to high efficiently develop uranium from the uranium-bearing coal ash,the ash should be grinded to smaller than 75μm in size and a new uranium hydrometallurgical processing method should be developed.
作者
杨帆
李峰
胡南
张辉
丁德馨
YANG Fan;LI Feng;HU Nan;ZHANG Hui;DING De-xin(Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy,University of South China,Hengyang 421001,China;Hunan Province Key Laboratory of Green Development Technology for Extremely Low Grade Uranium Resources,Hengyang 421001,China)
出处
《矿物学报》
CAS
CSCD
北大核心
2020年第6期709-713,共5页
Acta Mineralogica Sinica
基金
核能开发科研项目
湖南省自然科学基金项目(2018JJ2329)
湖南省教育厅重点项目(18A247)。
关键词
含铀煤灰
铀矿物
解离度
工艺矿物学
高效回收
Uraniferous coal ash
uranium minerals
dissociation degree
process mineralogy
efficient recover
