Optimization of foundry sand characteristics of soda-activated calcium bentonite

Following soda activation, the bentonite properties fluctuate and change more or less with time depending on the soda addition. Since these changes on activated bentonite properties are reflected in the further use of these products, controlling methods should be developed to optimize the product quality. In this study, optimization was achieved using the Response Surface Regression method (RSM) for activated calcium bentonites used in foundry sands. Evaluating the influence of soda addition and aging time on the bentonite properties, the activation conditions were optimized.

Optimization of both activated bentonite products and their binding effects in foundry sand can be achieved by applying Response Surface Methodology.Figure optionsDownload as PowerPoint slideResearch highlights
► Consistency on product quality can be controlled by optimization.
► Response surface methodology (RSM) was found as one of the best method to optimize the product quality.
► Applying RSM resulted in higher regression and correlation coefficients to optimize the activated bentonite products.
► Applying RSM resulted in higher regression and correlation coefficients to optimize the foundry sand properties.