STUDIUM REAKCÍ TEKUTÉ LITINY S FORMOVACÍ SMĚSÍ NA BÁZI PORTLANDSKÉHO CEMENTU

STUDY OF INTERACTION OF LIQUID IRON AND PORTLAND CEMENT MOULDS

článek v časopise - ostatní, Jost

cs

Technologies and materials used in industry are still more influenced by ecological aspects and demands. In foundries, the use of resins as a binder in moulds worsens the working conditions due to toxic combustions products emitted during pouring. The second serious problem is the needed recyclability of the used moulds, because until now, 70% of this material is disposed. This paper presents the results of the investigation of new hydraulically setting binders in foundry moulds with contact of liquid grey iron. These binders based on alumina and Portland cements are environmentally friendly and exhibiting admirable performance. Methodology of trials was designed and its attestation was implemented in experimental and working conditions. In the interface between cement sands and liquid metal were certified generation of complex allied substances – on the base Si, Fe, Al and Ca. In many cases FeS has been found. All these compounds are illustrated by SEM microscopy. The mathematical model of mechanical penetration has been created and proved influence of the temperature and chemical composition of grey iron on the range of penetration in the experimental moulds. The research and development of these inorganic binders for the foundry use will be the solution for future no waste technologies.

Technologies and materials used in industry are still more influenced by ecological aspects and demands. In foundries, the use of resins as a binder in moulds worsens the working conditions due to toxic combustions products emitted during pouring. The second serious problem is the needed recyclability of the used moulds, because until now, 70% of this material is disposed. This paper presents the results of the investigation of new hydraulically setting binders in foundry moulds with contact of liquid grey iron. These binders based on alumina and Portland cements are environmentally friendly and exhibiting admirable performance. Methodology of trials was designed and its attestation was implemented in experimental and working conditions. In the interface between cement sands and liquid metal were certified generation of complex allied substances – on the base Si, Fe, Al and Ca. In many cases FeS has been found. All these compounds are illustrated by SEM microscopy. The mathematical model of mechanical penetration has been created and proved influence of the temperature and chemical composition of grey iron on the range of penetration in the experimental moulds. The research and development of these inorganic binders for the foundry use will be the solution for future no waste technologies.

Technologies and materials used in industry are still more influenced by ecological aspects and demands. In foundries, the use of resins as a binder in moulds worsens the working conditions due to toxic combustions products emitted during pouring. The second serious problem is the needed recyclability of the used moulds, because until now, 70% of this material is disposed. This paper presents the results of the investigation of new hydraulically setting binders in foundry moulds with contact of liquid grey iron. These binders based on alumina and Portland cements are environmentally friendly and exhibiting admirable performance. Methodology of trials was designed and its attestation was implemented in experimental and working conditions. In the interface between cement sands and liquid metal were certified generation of complex allied substances – on the base Si, Fe, Al and Ca. In many cases FeS has been found. All these compounds are illustrated by SEM microscopy. The mathematical model of mechanical penetration has been created and proved influence of the temperature and chemical composition of grey iron on the range of penetration in the experimental moulds. The research and development of these inorganic binders for the foundry use will be the solution for future no waste technologies.

Iron, Casting, Mould, Cement, Sand, Interaction

Iron, Casting, Mould, Cement, Sand, Interaction

2009

18.04.2009

Ostrava

1210-0471

Transaction of the VŠB-Technical university of Ostrava, Mechanical series

52

2

327–336

10