Abstract

This paper deals with two recent and highly important developments in blast-furnace construction and practice; namely, the trend toward furnaces having daily capacities of 1000 tons or more, and the profitable utilization of blast-furnace gas in the firing of coke ovens, making open-hearth steel, and in the various types of heating furnaces employed in steel mills. These developments have involved certain structural changes in the stacks, which have in time necessitated changes in such auxiliaries as stock-house and blowing equipment, gas cleaners, hot-blast stoves, and boilers. These are all considered in detail by the authors.

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