EP 0634960 B1 19960417 - FOUNDRY SAND REGENERATING PROCESS AND DEVICE

Title (en)

FOUNDRY SAND REGENERATING PROCESS AND DEVICE

Title (de)

VERFAHREN UND VORRICHTUNG ZUM REGENERIEREN VON GIESSEREISAND

Title (fr)

PROCEDE ET DISPOSITIF DE REGENERATION DE SABLE DE FONDERIE

Publication

EP 0634960 B1 19960417 (DE)

Application

EP 93903831 A 19930217

Priority

DE 9300168 W 19930217
DE 4212097 A 19920410

Abstract (en)

[origin: WO9320964A1] A regeneration process for foundry sand, in particular active bentonite-containing used sand, dispenses with preliminary thermal treatments and allows most valuable substances contained in the used sand to be recovered. The sand is partially fluidized with air in a grinder, by means of which valuable substances and dust are continuously carried out and separately collected. The considerably increased grinding and dedusting performance requirements caused by the suppression of preliminary thermal treatments are met by a composite system of separate grinding and dedusting areas through which the sand continuously circulates in a vertical circuit.

IPC 1-7

B22C 5/10; B22C 5/02

IPC 8 full level

B22C 5/00 (2006.01); B22C 5/02 (2006.01); B22C 5/04 (2006.01); B22C 5/10 (2006.01)

CPC (source: EP US)

B22C 5/02 (2013.01 - EP US); B22C 5/10 (2013.01 - EP US); Y10S 241/10 (2013.01 - EP US)

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB IT LI NL PT SE

DOCDB simple family (publication)

WO 9320964 A1 19931028; AT E136826 T1 19960515; AU 3491793 A 19931118; BR 9306220 A 19980630; CA 2117787 A1 19931011; CZ 248194 A3 19960214; DE 4212097 A1 19931014; DE 4212097 C2 19940127; DE 59302276 D1 19960523; EP 0634960 A1 19950125; EP 0634960 B1 19960417; HU 9402907 D0 19950228; HU T70816 A 19951128; JP H08504131 A 19960507; US 5439044 A 19950808; US 5520341 A 19960528

DOCDB simple family (application)

DE 9300168 W 19930217; AT 93903831 T 19930217; AU 3491793 A 19930217; BR 9306220 A 19930217; CA 2117787 A 19930217; CZ 248194 A 19930217; DE 4212097 A 19920410; DE 59302276 T 19930217; EP 93903831 A 19930217; HU 9402907 A 19930217; JP 50553493 A 19930217; US 40716195 A 19950321; US 4600793 A 19930409