New foundry process claimed to cut cost of air pollution rules

Iron foundries operating cold blast cupolas may be able to reduce the cost of complying with new air pollution rules by installing a new process which is claimed to reduce fume and carbon monoxide emissions dramatically during melting.

Cupolas are vertical units which are charged with coke, limestone and ferrous scrap to produce molten metal at 1250-1650° C. The process emits smoke, grit and metal oxide fume. It is now subject to the local authority air pollution control system introduced by the Environmental Protection Act 1990. The industry has been objecting to the costs of complying with the new rules (ENDS Report 194, pp 13-16).

The low fume process, developed

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