| Abstract Scope |
Aluminum dross is a byproduct produced by aluminum smelting. It contains AlN, Al2O3, Al, and so on. However, some of them are unstable like AlN which would react with water to produce ammonia and be harmful to the environment and human body. To deal with the issue, PEG is used as grinding aid to be ball-milled with aluminum dross. After milling, not only the finer aluminum dross can be obtained, but the relatively stable organic protective layer may form. From FTIR, it showed that the hydroxyl groups from PEG would bond with ammonia generated by AlN. Besides, after the hydrolysis test, aluminum dross without coating with PEG has a larger surface area, which may be caused by the porous structure of the hydrolyzed product AlOOH. From the result, the protective layer can prevent water from contacting with aluminum dross, thus, slowing down the hydrolysis reaction of AlN. |