EP 0512236 B1 19951206 - Process for mechanical reclaiming of used foundry sand.
Title (en)
Process for mechanical reclaiming of used foundry sand.
Title (de)
Verfahren zur mechanischen Reinigung von Giessereialtsand.
Title (fr)
Procédé de récupération mécanique de sable de fonderie décoché.
Publication
Application
Priority
DE 4111726 A 19910410
Abstract (en)
[origin: US5291935A] The invention relates to a process for the mechanical cleaning of foundry used sand by means of thermomechanical regenerations, in which the sand is blown pneumatically against a deflection hood and the mechanical-pneumatic cleaning is performed batchwise in a separate container. The process can be used both as pre-cleaning and as after-cleaning. In the case of pre-cleaning there is a simultaneous drying, preheating, pre-cleaning and sifting, whereas with after-cleaning there is a simultaneous cooling, after-cleaning and sifting. As a result of the batchwise operation, all the quartz particles are exposed roughly to the same friction treatment and consequently, in conjunction with a simple control of the cleaning process, reduced grain destruction is achieved.
IPC 1-7
IPC 8 full level
B22C 5/18 (2006.01)
CPC (source: EP US)
B22C 5/18 (2013.01 - EP US); Y10S 241/10 (2013.01 - EP US)
Citation (examination)
Metal Handbook 9th Edition, Vol. 15, Casting, 1988, Metals Park, S. 352-354
Designated contracting state (EPC)
AT BE CH DE DK FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0512236 A1 19921111; EP 0512236 B1 19951206; AT E131091 T1 19951215; DE 4111726 A1 19921015; DE 4111726 C2 19940224; DE 59204541 D1 19960118; DK 0512236 T3 19960122; US 5291935 A 19940308; ZA 922356 B 19921125
DOCDB simple family (application)
EP 92105216 A 19920326; AT 92105216 T 19920326; DE 4111726 A 19910410; DE 59204541 T 19920326; DK 92105216 T 19920326; US 86655892 A 19920410; ZA 922356 A 19920331