关键词:
钪资源,
湿法冶金,
提取工艺
Abstract: As one of rare and precious rare earth elements, scandium is extremely dispersed in the crust and often associated with other minerals. With excellent properties of scandium and its compounds, scandium is widely used in aerospace materials, electronic information, nuclear technology and other industries. It is mainly used in aluminum?scandium alloy material, solid oxide fuel cell (SOFC), scandium sodium halogen (HID) lamp, ultralight shape memory magnesium?scandium alloy and fast storage. The technology of scandium recovery is complicated and the cost is high. Scandium is abundant in China, which accounts for 1/3 of the world. The research of scandium extraction and deep processing in China is still weak, and there is a big gap with the world advanced level. This work summarized the resource distribution, supply and demand of scandium, and introduced the technologies and examples of scandium extraction from different scandium containing materials, such as titanium dioxide waste acid, red mud, zirconium smelting materials, tungsten slag, focused on the application of solvent extraction in extracting scandium process, and analyzed the different extraction system of extraction mechanism of scandium, found that low extraction rate, emulsification and three phase problems were the common difficulties of scandium system. In addition, it was proposed that China should lead the designated product standards, focus on the study of methods to improve the recovery of scandium, improve the comprehensive extraction of scandium and symbiotic elements, and constantly develop green extraction technology.
Key words:
scandium resource,
hydrometallurgy,
extraction process