稀土高温酸法工艺放射性废渣资源性研究
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- 英文论文题名：The study of resource attribute of radioactive waste from High-temperature acid-based process for Rare Earths
- 论文作者：崔建国 ; 侯睿恩 ; 王哲 ; 张丽 ; 郝肖丽 ; 高婷
- 英文论文作者：Cui Jianguo ; Hou Ruien ; Wang Zhe ; Zhang Li ; Hao Xiaoli ; Gao Ting ; Baotou Research Institute of Rare Earths ; State Key Laboratory of Rare Earth Resources and Comprehensive Utilization in Baiyunebo ; National Engineering Researh Centre of Rare Earth Metallurgy and Function Materials
- 年：2016
- 作者机构：包头稀土研究院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;
- 论文关键词：放射性 ; 废渣 ; 资源特性 ; 经济价值
- 英文论文关键词：radioactivity ; waste slag ; resource characteristics ; economic value
- 会议召开时间：2016-09-06
- 会议录名称：2016全国稀土冶炼与环境保护技术交流会会刊
- 语种：中文
- 分类号：X758
- 学会代码：ZGXT
- 会议名称：2016全国稀土冶炼与环境保护技术交流会
- 会议地点：中国广西南宁
- 主办单位：中国稀土学会环境保护专业委员会、中国稀土学会化学和湿法冶金专业委员会、中国稀土学会火法冶金专业委员会
- 学会名称：中国稀土学会
- 页数：5
- 文件大小：612k
- 原文格式：O
- 会议级别：全国
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。
The radioactive waste slag were extracted from Bayan Obo mixed rare earth concentrate(REO~50%)by traditional sulfuric acid decomposition process.The generation process,chemical composition,surface morphology and particle size distribution were investigated and identified systemically.Furthermore,some preliminary study has been done to quantify the resource of the waste slag and its related exploitation in future.It has found that the waste slag is rich in abundant valuable elements such as rare earth,thorium,niobium,phosphorus,iron etc,which small amount of rare earths are in the form of mineral and most of the rare earths are bundled by other elements.And the contents of elements like praseodymium,neodymium,gadolinium are larger than other elements,so the waste slag has great resource reservation and economic value.According to national standards,if the α、β totally specific radioactivity of waste slag is around 7.11 × 10~4Bq/kg,the slag belongs to class- I(low-radioactive wastes);Besides,its leaching toxicity and causticity are both accord with national standard,ascribing to class- I general industrial waste.In addition,These valuable elements can be extracted from the heated acid solution,this will be beneficial for comprehensive utilization of waste slag.
The radioactive waste slag were extracted from Bayan Obo mixed rare earth concentrate(REO~50%)by traditional sulfuric acid decomposition process.The generation process,chemical composition,surface morphology and particle size distribution were investigated and identified systemically.Furthermore,some preliminary study has been done to quantify the resource of the waste slag and its related exploitation in future.It has found that the waste slag is rich in abundant valuable elements such as rare earth,thorium,niobium,phosphorus,iron etc,which small amount of rare earths are in the form of mineral and most of the rare earths are bundled by other elements.And the contents of elements like praseodymium,neodymium,gadolinium are larger than other elements,so the waste slag has great resource reservation and economic value.According to national standards,if the α、β totally specific radioactivity of waste slag is around 7.11 × 10~4Bq/kg,the slag belongs to class- I(low-radioactive wastes);Besides,its leaching toxicity and causticity are both accord with national standard,ascribing to class- I general industrial waste.In addition,These valuable elements can be extracted from the heated acid solution,this will be beneficial for comprehensive utilization of waste slag.
引文
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[2]赵长有.白云鄂博的钍与铀(一)[J].稀土信息,2006,(7):12-15.
[3]刘建亮,罗明标,平爱东,等.稀土精矿中钍的提取工艺研究进展[J].稀有金属,2012,36(4):651-658.
[4]Huang X W,Long Z Q,Li H W,et al.Development of rare earth hydrometallurgy technology in China[J].Journal of Rare Earths,2005,23(1):1-4.
[5]陈立东.三代酸法稀土分离工艺改进和发展过程[J].包钢科技,2003,29(2):80-82.
[6]徐光宪,师昌储,王淀佐,等.关于保护白云鄂博矿钍和稀土资源,避免黄河河包头受放射性污染的紧急呼吁[J].院士与学部,2005,20(6):448-450.
[7]徐光宪.白云鄂博矿钍资源开发利用迫在眉睫[J].稀土信息,2005,(5):3-5.
[8]李春龙,徐广尧.关于包头钍资源战略储备的剖析[J].稀土,2014,35(4):115-118.
[g]李春龙,李小刚,徐广尧.白云鄂博共伴生矿资源综合利用技术开发与产业化[J].稀土,2015,36(5):151-158
[10]李德谦,左勇,白彦,等.一种从硫磷混酸体系中萃取分离钍和提取氯化稀土的工艺[P].China:CN02123913,2003.
[11]苏文清,贺海钧,宋洪芳,等.包头白云鄂博矿钍资源的回收及用于核电燃料的研究现状[J].稀有金属,2005,29(6):914-918.
[12]崔小震,陈月华,任萍,等.独居石酸溶渣资源综合回收绿色循环工艺[J].稀土,2015,36(3):61-66.
[13]黄小卫,张国成,龙志奇,等.从稀土矿中综合回收稀土和钍工艺方法[P].中国,CN200510085230,2006.
[14]王敏,方方,帅震清,等.四川氟碳铈矿选冶工艺过程放射性污染现状[J].稀土,2011,32(3):94.
[15]张书成,刘平,仉宝聚.钍资源及其利用[J].世界核地质科学,2005,22(2):98.
[16]白丽娜,张利成,王灵秀.包头稀土生产带来的放射性环境污染及防治措施[J].稀土,2001,22(1):76.
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