Open Access Thesis
Sand, Foundry--Recycling; Coremaking;
Increasing environmental regulations, transportation cost, delivery interruptions leading to production concerns, disposal cost, and demand from other industries have influenced the way foundry’s view used sand. The purpose of this research was to determine a beneficial reuse of overflow-green sand that would normally be disposed. The reclamation process used is a combination of mechanical and wet reclamation. The focus was on the production of foundry cold box cores and if using this reclamation process could create a core with a similar quality performance compared to new sand. Research in reclamation could pave the way for a closed loop sand system, where only small additions are needed to maintain a similar quality sand system as regularly purchasing new sand.
The following methods were used to determine the sand quality: scanning electron microscope examination, loss of ignition, screen distribution, transverse tensile, tensile properties, core density, sand expansion dilatometry, surface area and coefficient of angularity, and production casting trials. Compared to new sand, the tensile strength increased with the reclaimed sand samples when a similar sand sized grain distribution and binder amount was used. Additional benefits include increased core density, better flowability during core production and a reduction of veining type defects. The proprietary reclamation process used indicates overflow green sand can be reclaimed to produce cold box cores that are equal or improved to new sand.
Year of Submission
Master of Science
Department of Technology
Scott Giese, Chair, Thesis Committee
1 PDF file (vii, 55 pages)
©2020 Kristopher Lee Boss
Boss, Kristopher Lee, "Investigating the production of cores by using reclaimed foundry green sand" (2020). Dissertations and Theses @ UNI. 1034.