Atmospheric pollution created by mould gas and dust

ABSTRACT

This paper presents an experimental study about pollution created by harmful gases present in mould gas mixture and siliceous fine dust. Samples of gas were collected from the atmospihere a large foundry, analysed, and suggestions are put forth for environmental control in foundries. Present study has revealed that quantity of CO and C02 gases and fine siliceous dust in moulding and fettling shops crosses the minimum admissible amounts and may cause fibrosis and silicosis. A contaminant free healthy atmosphere in working zone can be obtained by different modem techniques, electrostatic curtain for pushing gas fumes and smoke out of foundary, use of different fog guns for setting dust and by passing the mixture of gas present in foundry through some non-volatile absorbants, casting in vacuum mould free from carboneceous additives, replacing silica by non-silica moulding aggregates e.g, olivine and better ventilation system