氢氧化铍中硫酸根去除试验研究.pdf

第34卷第4期
恰工程
Vol 34 NQ4
2014年08月
MINING AND METALLURGICAL ENGINEERNG
August 2014
氢氧化铍中硫酸根去除试验硏究
李中',王清良,李乾',胡鄂明!,熊骁,肖吉昌2,成泉辉
(1南华大学核资源工程学院,湖南衡阳421001;2.中国科学院上海有机化学研究所,上海200032;3.水口山有色金属有限责任公司第六冶炼厂,湖南
衡阳421001)
摘要:分別采用洗涤法、氯化钡沉淀法、氢氧化钠水解再沉淀法去除氢氧化铍中硫酸根,结果表明:采用洗涤法去除硫酸根的效果最
差,硫酸根去除率仅为50%;氯化钡沉淀法去除硫酸根的效果较明显,能将氢氧化铍中硫酸根含量降至0.3%以下,但氯化钡沉淀法成
本较高、可能带来二次污染;氢氧化钠水解后再沉淀法能将氢氧化皱中的硫酸根含量从6.77%降到0.020%以下,硫酸根去除率达9.
7%,此法具有相对成本低、无二次污染等优点,为核纯级氢氧化铍的制备提供了依据。
关键词:洗涤法;氯化钡法;氢氧化钠法;氢氧化铍;硫酸根
中图分类号:TQ132
文献标识码:A
doi;10.3969/j.is.0253-6099.2014.04.020
文章编号:0253-6099(2014)04-0083-04
Experimental Study on Removal Sulfuric Acid Radical(Ion)
from Beryllium Hydroxide
LI Zhong WANG Qing-liang, LI Qian HU E-ming ,XIONG Xiao XIAO Ji-chang, CHENG Quan-hui
(1 School of Nuclear Resource Engineering, niversity of South China, Hengyang 421001, Hunan, China; 2. Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, hanghai 200032, Chi; 3.N6 Smelter, Shuikoushan
Mining Administration, Hengyang 421001, Hunan, China
Abstract: Tests on removal of sulfate radical contained in eyllium hydroxide were conducted with several if erent
methods, including washing, barium chloride precipitation and a combined method of hydrolysis by sodium hydroxide and
precipitation. Results indicated that washing method had the worst effect, resulting in only 50% sulfate radical remove
And the method of barium chloride precipitation brought the content of sulfate radical in beryllium hydroxide remarkabl
reduced to less than 0.3%, which, however, was put at a disadvantage by its high cost and possibly accompanied pollution
problem By compaison, the third method of hydrolysis by sodium hydroxide followed by precipitation could reduce the
content of sulfate radical from 6.77% to less than 0.020%, with removal rate up to 99.7%. Furthermore, this method being
characterized by low cost and free of secondary pollution, may be of reference for preparation of beryllium hydroxide of
nuclear grade purity
Key words: washing method; barium chloride precipitation method; hydrolysis using sodium hydroxide before
precipitation beryllium hydroxide; sulfate radical
核能是清洁能源,在我国化石能源日益短缺、雾霾要求。目前市场上没有BeF2产品,更没有核纯级BeF2
现象日益严重的今天,大力发展核能已成为我国能源中产品
长期发展规划的重点。在众多国家认可的第四代先进
铍最初来自于铍矿石,经过加工处理后成为
核能系统反应堆中,新概念熔盐堆是反应堆中重要的液Be(OH)2,深加工后得到BeF2。由于核纯BeF2的指标
体燃料反应堆,在安全性、经济性、核废物最小化、核燃要求很高(见表1),Be(OH)2作为BeF2的中间产物,纯
料长期稳定供应、核资源可持续发展及防核扩散等方面度要求也极高,特别对Al、Fe和硫酸根的含量有更严格
具有其它反应堆无法比拟的优点。BeF2作为钍基要求,参照中科院提出的初步标准,它们的含量要求分
嫆盐堆溶剂盐的重要成分,其质量指标必须达到核纯级别不大于0015%、001%和0.05%。用(NH4)2S04和铁
①收稿日期:2014-02-17
甚金项目:湖南省科技厅重点项目资助(2013GK2023
作者简介:李中(1986-),男,河南郑州人,硕土研究生,研究方向为溶浸采矿
通讯简介:王清良(1969-),男,湖南新宁人,教授,硬士研究生导师,主要从事生物技术和溶浸采矿技术研究。