Influencing of foundry bentonite mixtures by binder activation

摘要

Although new moulding processes for manufacture of high quality castings have been developed and introducedinto foundry practice in recent years, the green-sand moulding in bentonite mixture still remains the most widelyused technology. Higher utility properties of bentonite binders are achieved through their activation. This contributionis aimed at finding a suitable activating agent. A number of sodium salts and MgO based agents has beenchosen. In the framework of the experiment the swelling volume of chosen agents was tested and technologicalparameters of a bentonite mixture with a binder activated with the studied agents were determined.