Thiti Tangjitsangiem | Dreamstime
'Availability of new foundry sand is already becoming a challenge, along with the need of providing new solutions to waste management,” according to the director of a metallurgical research center.
Branimir Ritonja | Dreamstime
Automotive cast parts.
Seesea | Dreamstime
Fire photo
Jacek Sopotnicki | Dreamstime
With deoxidized base iron, carbon levels can be increased to 3.30% C and alloying can be completely or nearly eliminated at the same time.

Top Uses for Bonded Sand

July 31, 2014

The use of sand in metal casting is a very common practice.  Over 70% of all metal castings are produced via a sand casting process. In green sand clay bonded, process the sand is used over and over again after some treatment of the used demoulded ‘return’ sand. The treatment includes sieving, removal of Iron particles, cooling, water and binder addition, mixing etc.

But in case of chemically bonded sand system the mold / core strength is developed by chemical reaction or thermal process.  It is not reversable.  The bonded sand is re-used, introducing a certain portion of fresh sand into the mixture, but at some point the issue arises.  What to do with all this Bonded Sand?

In this article, "Considerations for Reclaiming Chemically Bonded Sand," the author, Jack Palmer, suggests that foundries can't ignore the potential ROI that bonded sand offers.

Here's a look at bonded sand reclamation, and the top uses for bonded sand.