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This document summarizes a process for reclaiming sand used in foundry molds bonded with sodium silicate. It discusses how sodium silicate works as a binder and issues with its use including low strength, preservation and reclamation difficulties. The key to reclamation is removing the elastic silicate film from sand grains using a thermo-mechanical process - heating sand to 150°C to stiffen the film followed by mechanical attrition to remove it. A case study of an Italian foundry using this process achieve

Author

Ytyus Black

Language

EN