Processing of Spent Ceramic Linings from TiAl-Castings for Yttria Recovery

摘要

The work deals with leaching of TiAl-waste under laboratory conditions and scale up of the leaching process using hydrochloric acid. The different samples were leached after crushing, grinding, and sieving with a solution of hydrochloric acid. The effects of acid concentration, agitation time, solid/liquid ratio and fraction size on the efficiency of leaching were investigated. When two hours agitation time, 10 % solid/liquid ratio and 1M hydrochloric acid were applied then the best results of the leaching of yttrium were obtained under laboratory conditions. The optimal leaching parameters were tested in 100 L reactors.