Cleaning of used sand by removing the adhesive binder coatings.
The two main purposes of sand reclamation are:
Generally, a differentiation is made between mechanic reclamation (cold reclamation), thermal reclamation (hot reclamation) and wet reclamation.
Already during the reclamation process, the removal of dusts must be ensured as otherwise these act as lubricants thus having a negative impact on the efficiency of the reclamation and the quality of the reclaimed material (see Dedusting).
Fig. 1 gives an overview of the necessary process steps in the various reclamation processes which have to be adjusted to the relevant mold material system. Fig. 2 (Küttner GmbH & Co. KG) shows a Knock-out station for large molding boxes and sand regeneration.
Renown companies supplying reclamation systems are GUT GmbH Freudenberg, Webac - Gesellschaft für Maschinenbau mbH Euskirchen, Küttner GmbH & Co. KG, KLEIN Anlagenbau AG as well as AAGM Aalener Gießereimaschinen GmbH Bopfingen.
Figure 3 shows a possible layout of a sand reclamation plant.