Abstract
A two-compartment open-chamber furnace with separating door operated from the outside is described. The source of heat is an electric current passed through a nichrome resistor ribbon wound over refractory supports arranged along the sides of the furnace. The front or preheating compartment is operated at 300°C and the back or finishing compartment at 900°C, with automatic control. The advantages, compared with oil heating, are: rejections reduced from 25 per cent to zero; 50 per cent increase in output for same floor space; 47.4 per cent lower fuel cost; improved quality and uniformity; lower maintenance cost and greater ease of operation.
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