|About this Abstract
||Part C-3: Processing of Critical Metals
||Development of Scandium-Recovery Process from Titanium-Smelting Residue
||Kota Nakashima, Yoshifumi Abe, Hidenori Okamoto, Akira Yoshimura, Matsuhide Horikawa, Seiichiro Tani
|On-Site Speaker (Planned)
The residue from a titanium smelting process contains scandium. However, the scandium is discarded as in the residue, because there was not so suitable process existed for recovering the scandium from the residue. To use any discarded resource effectively is an important issue for preserving the earth environment and achieving the sustainable development of society. JX Nippon Mining & Metals has been developing scandium recovering process from the residue of a titanium smelting process since 2015. The process consists of the following technologies: (i) Concentrating scandium by classification or neutralization. (ii) Selective leaching of scandium. (iii) Removal of impurities. (iv) Solvent extraction scandium with D2EHPA. (v) Purification. (vi) Roasting. We have established a process to produce Sc2O3 from the residue by optimizing and combining these technologies. This paper will introduce the results of bench scale tests and the flowsheet of scandium recovering process developed by JX Nippon Mining & Metals.
||Planned: At-meeting proceedings