Abstract
Dusts arise in almost every step of foundry processes. A huge amount of dust is generated by mould sand and core sand preparation. Composition of these dusts depends on used binder. The major compound in these dusts is SiO2 and when an organic binder is used it is carbon as well.
Melting processes are connected with formation of flue dust. Its composition depends on charge composition. Next melting furnaces are mainly used in foundry: cupola furnaces, electric arc furnaces and electric induction furnaces. Cupola furnaces are the biggest producer of flue dust from mentioned furnaces. Flue dust from cupola furnace is very fine-grained dust with a high content of SiO2 and Fe.
Also pouring, feetling, casts cleaning and grinding produce a high amounts of dust.
Seven kinds of dust from different parts of cast iron foundry were analysed. On the base of achieved results from chemical analyses, granulometric analyses and microscopic analyses three kinds of dusts were chosen for next purposes – preparation of sand mixtures and testing their technological properties.
On the base of technological properties results the non-magnetic part of dust from casts cleaning was used. By experiment, that had to determined scubs inclination on casts according to Patterson and Bönisch test.