2025 - Sustainable Industrial Processing Summit
SIPS2025 Volume 11. Intl. Symp on Iron and Steel, Non-ferrous, Metals, Bioextraction, Molten and Recycling
| Editors: | F. Kongoli, P. Assis, R. Alvarenga, J.A. de Castro, B. Deo, W.F. Santos Jr., S.L. de Andrade, GS. Mahobia, T. Usui, J. Antrekowitsch, A. Charitos, C. Oosterhof, M. Stelter, Z. Wang, A. Dmitriev, M.C. Gomez Marroquin, Y. Gordon, M. Naimanbayev, S. Prakash, V. Tsepelev |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2025 |
| Pages: | 298 pages |
| ISBN: | 978-1-998384-58-7 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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RECYCLING POSSIBILITIES OF SiO2 FROM FOUNDRY WASTE
Alena Pribulova1; Peter Futas1; Patrik Fedorko1; Peter Blasko1; Jozef Petrik1; Brahim Safi2; Mária Mihalikova1; Marcela Pokusova3;1TECHNICAL UNIVERSITY OF KOSICE, Kosice, Slovakia; 2M'HAMED BOUGARA UNIVERSITY – BOUMERDES, Algeria, Algeria; 3SLOVAK UNIVERSITY OF TECHNOLOGY IN BRATISLAVA, Bratislava, Slovakia;
Type of Paper: Regular
Id Paper: 51
Topic: 7
Abstract:
The largest amount of input raw materials in the foundry is silica sand, which constitutes more than 90% of the molding mixture, which is necessary for the production of molds necessary for the production of castings. Almost all silica sand that enters the foundry ends its material cycle in a landfill, either after a single use (molding mixture with an organic binder) or after a certain period of time. Three types of waste with a high SiO2 content are generated in the foundry: dust from handling the molding mixture (preparation of the molding mixture, molding and framing of castings), dust from blasting of castings, the non-magnetic part of which contains a high proportion of SiO2, and the used molding mixture. The paper proposes methods for treating and utilizing these wastes containing SiO2 either directly in the foundry or in other industrial sectors. Dust extracted from the molding mixture preparation workplace can be returned to the process in limited quantities without impairing the properties of the molding mixtures. Dust obtained from blasting castings can be separated by magnetic separation into a non-magnetic component containing a high proportion of SiO2 and can be returned to the process, and the used molding mixture was added as a substitute for building sand in the preparation of concrete.