Cores Produced by Geopolymer Binder System Technology and Impact to Casting Quality in Comparison with PUR Cold Box Amin

Abstract

The article deals with geopolymer binder system for core production, especially by dehydration technology and comparison with PUR cold box amin technology. A sodium-potassium type of geopolymer binder is the subject of the research. The goal of the article is the core production and observing of technological properties, storing cores, usage of refractory coating evaluating of properties during the pouring and decoring of casting. The main target of the experiment is casting quality. It was stated that the final surfaces are much more better than PUR cold box amin technology and the internal casting quality is the same, it means without inadmissible internal defects. Worse decoring times were observed. It has been confirmed, that neither emissions, fumes nor unpleasant odours are generated during the production procedure nor during pouring.

Archives of Foundry Engineering

“…The GEOPOL ® technology is included in the environmental programme, for example in the USA, the official goal is the change of the environmental footprint of the foundry industry. In general, it is expected that the inorganic binder systems achieve significant reductions in emissions [12]. The comparison of the binder systems from the point of view of the BTEX and the PAH shows in graphs in Fig.…”

“…4. Results of pollutant measurement during pouring, comparison of organic and inorganic binder systems [12] The GEOPOL ® technology is currently used in the foundries for three basic production processes/technologies: (1) for selfhardening moulding mixtures, (2) sand mixtures hardened by gaseous carbon dioxide and (3) the hot box technology with hot air hardening.…”

Archives of Foundry Engineering

“…The technology is suitable for serial and mass core production. The whole technology is purely inorganic; thus, it has a minimal impact on the environment and ensures favourable hygienic conditions [8].…”

“…The temperatures from 150 to 200 °C allow to obtain a long storage time and prevent the reverse cores hydration. Dehydration can also be achieved by microwave hardening [8].…”