Simple Solutions That Work! Issue 12

Contact: TIM MCMILLIN tim.mcmillin@imerys.com • The bentonite and carbon slurry is added back into the sand preparation process. It comprises a significant percentage of the water, bentonite and carbon needed in the green sand process. • Because it is pre-hydrated, the RIKO material exhibits better binding and sand property performance compared to traditional dry materials. • The recovered bentonite and carbon is at least 50% lower in total cost versus traditional, dry bentonite and carbon. • No need for capital equipment investment. IMERYS invests the CapEx, licenses process, and charges monthly for the amount of material produced/consumed. The foundry operates the system and pays all variable expenses, with IMERYS remote monitoring and regular field technical assistance. • Patents have be submitted for expansion of the RIKO process to include a unique dry separation methodology. This is still in the development stages, but would allow for a much larger percentage recovery and foundry market capture. • Research on a dry process involves a similar cyclonic removal technique, but without introduction of water. While less efficient, this dry technique does not limit the amount of material that can be re- introduced into the foundry sand system. RIKO® Foundry Process Results - Victaulic Foundry (AFS Paper) Bond 23%↓ Green Compressive Strength 10%↑ Wet Tensile 15% ↑ Hot Compressive Strength 33% ↑ RIKO © Foundry Process Results - Victaulic Foundry (AFS Paper) − A semi solid thixotropic solution consisting of 20- 25% solids − With >65% bentonite and >20% carbon 39 BACK TO BASICS