Abstract
At present, thermal treatment-scrabbing process is generally considered as the most suitable process for reclamation of foundry waste sand. But when using the CO2 processed sand for mold or core making, it is usually impossible to apply thermal treatment to the waste sand containing water glass sand, because the component of solidified water glass in waste sand is viscous at high temperatures, and causes the coagulation of heated sand to stick together. Therefore the thermal reclamation process in the fluidizing bed furnace is not applicable. We experimented with the behavior of solidified water glass in waste sand at high temperatures, and then studied the condition of flidizing bed formation for thermally treating this kind of sand. From our results, we were able to find the possibility of developing thermal systems for reclaiming this kind of waste sand.
