金属钪资源及我国回收利用技术

Scandium Resources and Recycling Technology in China

金属钪具有诸多的优异性能,有着相当广泛的用途和非常重要的作用,虽然在地壳中的含量不低,但是其分布极为分散,分离和提取的难度较大。我国目前提取金属钪常用的方法包括溶剂萃取法、化学沉淀法和离子交换法等。通过对常用金属钪提取方法以及常用从钛白粉生产的废液中回收和提取钪、从氧化铝赤泥中回收钪和从钨渣中回收钪等典型的生产工艺进行分析,探讨了这些处理方法的优势与不足。为了提高回收、提取金属钪的纯度,应将各处理技术优化组合,并且寻找高效的萃取剂,完善和改进生产工艺设备。

Scandium is an important strategic element because of its excellent properties and has very important and wide use. Although the content in the crust is not low, its distribution is dispersed, and the separation and extraction is difficult. The current methods for extracting scandium metal in our country are solvent extraction method, chemical precipitation method and ion exchange method. Analyzes common scandium extraction methods and the typical processes of extracting and recycling scandium from titanium dioxide production liquid and from alumina red mud and from tungsten slag,and discusses the advantages and disadvantages of these methods. In order to improve the extraction and recovery purity of scandium metal, proposes that the combinatorial optimization techniques of each treatment, efficient extractants and the improved production process and equipment should be considered and investigated.