摘要
实验主要针对金属Dy一次还原生产中的氩气充入量、还原剂Ca加入量、二次精炼过程中精炼时间以及精炼温度分别进行控制,在生产结束后对所产金属杂质含量进行汇总分析。结果表明:氩气压力过大或过小,对还原反应都会造成不利影响,将氩气压力设定在-0.07MPa时,所获得的金属收率可控制在97.5%以上;实验中加入过量25.8%的Ca所获得的金属收率超过97.5%,进入粗金属中的杂质Ca,Fe都控制在比较低的水平;在精炼时间为40 min的条件下,精炼温度保持在1500℃左右时,收率达到99.7%,金属中W,Fe等杂质含量相对较低。对于生产高纯金属Dy,通过改进相关工艺参数,完全可以实现产品品质的进一步提高。
The experiment was mainly aimed at summarizing and analyzing the impurity metals contents at the production of dysprosium metal by controlling the argon quantity and amount of reducing agent Ca in the first reduction process,as well as controlling refining temperature and time in the secondary refining process. The results showed that if the argon gas pressure was too large or too small,there would be adverse effects on the reduction reaction. When the argon gas pressure was set at- 0. 07 MPa,the obtained metal yield can be controlled to more than 97. 5%; if excessive 25. 8% Ca was put into the process of the experiment,the obtained metal yield could be controlled to more than 97. 5% and the impurities of calcium and iron in the rough metals could be controlled at a low level. When the refining time continued for 40 min and the refining temperature kept at 1500 ℃,the obtained metal yield reached 99. 7%,and at the same time,the content of the impurities such as W,Fe in the metal was relatively low. For the production of high purity dysprosium metal,it is entirely possible to further improve the quality of the products by improving the related process parameters.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2014年第3期354-362,共9页
Journal of the Chinese Society of Rare Earths
关键词
金属镝
工艺参数
改良
dysprosium metal
productive technology
improvement
