EP 0032881 B1 19840328 - GRANULATED MATERIAL, AND PRODUCTION METHOD OF SAME, AS ADDITIVE FOR IMPROVING PROPERTIES OF FOUNDRY MOLDING SANDS
Title (en)
GRANULATED MATERIAL, AND PRODUCTION METHOD OF SAME, AS ADDITIVE FOR IMPROVING PROPERTIES OF FOUNDRY MOLDING SANDS
Publication
Application
Priority
IT 932380 A 19800121
Abstract (en)
[origin: EP0032881A1] The invention refers to a granulated material for preparation of foundry molding sand, to be added to them to improve their composition, reduce pollution and handling problems, which consists of a refractory framework in the form of granules the size of which ranges from 0.1 to 0.4 mm and an external coating on said refractory framework which in turn consists of a fit material for providing lustrous carbon. The refractory framework is formed by a zircon sand, chamotte, chromite, olivine, sillimenite, mullite or mixtures thereof, with a free silice content not greater than 3 %. The invention also relates to a hot-process and a cold-process for production of said granulated material.
IPC 1-7
IPC 8 full level
B22C 1/00 (2006.01); B22C 1/02 (2006.01); B22C 1/04 (2006.01)
CPC (source: EP)
Citation (examination)
- DE 2638042 A1 19770324 - FISCHER AG GEORG
- DE 1920224 B2 19750612
- DE 1952357 A1 19710429 - RAVENSBERGER EISENHUETTE
- DE 2716168 A1 19771027 - NYNAES PETROLEUM AB, et al
- DE 2313649 A1 19741003 - BUDERUS EISENWERK
- DE 1458104 B1 - VER ZUR FOERDERUNG DER GIESSER
- DE 2317218 A1 19741017 - HEINZE GERALD
Designated contracting state (EPC)
AT BE CH DE FR GB LI LU NL SE
DOCDB simple family (publication)
EP 0032881 A1 19810729; EP 0032881 B1 19840328; AT E6835 T1 19840415; DE 3162845 D1 19840503; IT 1209745 B 19890830; IT 8009323 A0 19800121
DOCDB simple family (application)
EP 81830010 A 19810121; AT 81830010 T 19810121; DE 3162845 T 19810121; IT 932380 A 19800121