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Study on the reuse and recycling of the used foundry sands  

Kim, Young-Jun (School of Biotechnology and Environmental Engineering, The Catholic University)
Chung, Myung-Hee (Korean Environment Corporation)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.18, no.4, 2010 , pp. 38-44 More about this Journal
Abstract
Foundry sands are made up of silica and some coking agents, such as bentonite or resin, and used as templates for the production of various casting products. Foundry sands, which are repeatedly used, were finally transformed into the waste materials by heat, losing their proper functions. The used foundry sands have been treated as general wastes according to the contents of coking agents used. Silica, however, can be recycled through the proper treatment due to its physical property not to changed by heat. In this study, we have identified and investigated at the occurrence, treatment and recycling status of the used foundry sands, as well as for the regime and inhibitory factors of the recycling of them in domestic and foreign cases.
Keywords
Used Foundry Sands; Coking Agents; Recycling; Silica;
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