The introduction of a unique low emission additive technology by Clariant

is enabling foundries to reduce BTEX emissions from green sand systems by up to 80% and produce highest quality castings with improved surface quality at optimum productivity.To assess the potential of this technology to contribute to the sustainability improvements wanted by foundries and related industries

this article examines the current primary techniques for emission reduction from bentonite-based green sand.It outlines the principles of the new technology and explains the innovative testing method developed by the company to measure and compare emissions of aromatics from lustrous carbon formers under realistic foundry process conditions.Finally

it shows results achieved in practice in a European foundry using the new low emission additive technology.