公开(公告)号：EP3620244A1

公开(公告)日：2020-03-11

申请号：EP18193306.0

申请日：2018-09-07

申请人： HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung

发明人： Li, Xin ,  Lustig, Christian ,  Reinold, Mirko ,  Schweinefuß, Maria ,  Egeler, Nicolas

IPC分类号： B22C1/18 ,  B22C5/18 ,  B22C5/04 ,  B22C5/10 ,  B22C1/02

摘要： Described is a method of preparing a particulate refractory composition for use in the manufacture of foundry moulds and cores from spent foundry moulds or cores formed of refractory material and a binder containing water glass, the method comprising the following steps: providing broken material from spent foundry moulds or cores or preparing broken material from spent foundry moulds or cores, wherein the broken material comprises particles and/or aggregates of particles of refractory material having hardened water glass binder on their surface, mixing the broken material with particulate amorphous oxide comprising silicon dioxide in an amount of 85 % by weight or more, based on the total amount of the particulate amorphous oxide, to give a mixture and subjecting the mixture to a heat treatment at a temperature of 400 °C or higher. Also described are a corresponding use, a reclamation mixture, and a method of making a foundry mould or core.