B - Operations – Transporting – 22 – C
Patent
B - Operations, Transporting
22
C
22/89
B22C 5/00 (2006.01) B22D 29/00 (2006.01) B22D 31/00 (2006.01)
Patent
CA 1168021
METHOD AND APPARATUS FOR THE WET DESANDING AND CLEANING OF CAST PIECES ABSTRACT OF THE DISCLOSURE In a hydro jet housing the form block, possibly with core, is stripped of mold sand by means of a high- pressure water jet. The sand is fed in the form of a muddy pulp to a first hydrocyclone, where the water is largely separated and is supplied for the formation of new muddy pulp. The sand flows into a scrubbing mechanism for knocking off its binding material, which has settled as a coat around the sand grains. After this again a muddy pulp is prepared in the intermediate container, which for the hydro-extraction of the water with the coating particles therein is fed to a second hydrocyclone. The sand is then dried and cooled and is available for further use. The contaminated water is neutralized with flue gas, after which a flocculation means is added to it and the cleaning takes place in a settling tank and possibly in a filter. The apparatus permits an economical operation, in that both the sand and also the water are being claimed in a closed cycle.
349195
Jung Werner
Oswald Jack
Foundry Design Corp. (europe)
Kirby Eades Gale Baker
LandOfFree
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