Reclaimability of the spent sand mixture – sand with bentonite – sand with furfuryl resin
Journal Title: Archiwum Odlewnictwa - Year 2011, Vol 11, Issue 2
Abstract
Introduction of new binding materials and new technologies of their hardening in casting moulds and cores production requires the application of reclamation methods adequate to their properties as well as special devices realizing tasks. The spent sands circulation system containing the same kind of moulding and core sands is optimal from the point of view of the expected reclamation results. However, in the face of a significant variability of applied technologies and related to them various reclamation methods, the need - of the obtained reclamation products assessment on the grounds of systematic criteria and uniform bases – arises, with a tendency of indicating which criteria are the most important for the given sand system. The reclaimability results of the mixture of the spent moulding sand with Geko S bentonite and the spent core sand with the Kaltharz 404U resin hardened by acidic hardener 100 T3, are presented in the paper. Investigations were performed with regard to the estimation of an influence of core sands additions (10 –25%) on the reclaimed material quality. Dusts and clay content in the reclaim, its chemical reaction (pH) and ignition loss were estimated. The verification of the reclaim instrumental assessment was performed on the basis of the technological properties estimation of moulding sand with bentonite, where the reclaimed material was used as a matrix.
Authors and Affiliations
J. Dańko, R. Dańko
Keywords
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