Mechanochemical Process for Recovering Indium from Flat Panel Displays
This paper is to introduce a novel process for recovering indium (In) from indium oxide (In2O3) by mechanochemical operation conducted at room temperature. The process is to mix a mixture of In2O3 and lithium nitride (Li3N) powders, and it is subjected to milling under N2/NH3 environment by using a mill such as a planetary mill at room temperature. The milling enables us to form a mixture of In and LiOH/Li2O powder as a reaction product in the mill. The reactions between In2O3 and Li3N depend on the environmental gasses, being expressed as follows, respectively: In2O3+Li3N+NH3→2In+3LiOH+N2 (1) In2O3+2Li3N→2In+3Li2O+N2 (2) After the formation of these products, certain amount of water is charged into the product in the mill pot and additional milling operation was conducted to dissolve LiOH/Li2O. Finally, we have recovered In-pellets as solid after filtration of the slurry. The role of the additional milling is dissolution of LiOH /Li2O into water as well as granulation of In-powder.
ITO Indium oxide Mechanochemical reaction Recovery Lithium nitride Milling Planetary ball mill
Junya Kano Fumio Saito
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan
国际会议
北京
英文
930-934
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）