Abstract

Abstract In this paper the author deals with the use of fuels in continuous heating furnaces of the railroad-car tunnel type, which furnaces at present provide the most efficient means of heat-treating such materials as metallurgical products, steel sheets, carbon electrodes, brick, tile, pottery, etc. He first takes up the various fuels—gas, oil, and coal, following which he deals with the movements of the gases in the various zones of the kiln; and finally with the confinement of products of combustion in muffles when accurate control of atmosphere is required as in the case of many high-grade metallurgical and ceramic products.

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