此工艺对稀散金属冶金提纯技术提出了新的研究领域。
The technological development has put forward the new field of rare metal in purify technology of metallurgy.
萃取是一项在化工、环保等领域广泛应用的分离提纯技术。
The extraction has been a widely used technology for separation and purification in various fields of chemical engineering, environmental, etc.
在此基础上，探讨了改进提纯技术，减少环境污染的几种有益的方法。
Several favourable methods are proposed for further improving the purifying techniques and reducing environment pollution based on the above discussions.
应用推荐