Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 447
ire fire-brick lining, which is exceedingly expensive, is ruined and must bereplaced. As the iron is drawn from be-low, there follow fresh charges of ore, fuel,and limestone above. This limestone is whatis called a flux; that is, a substance whosepresence aids in melting and rendering… … FIG. 9. ORE PILES AND BLAST-FURNACE. An intensely hot blast of air, driven in atgreat pressure by powerful blowing-engines,makes the coal burn, and reduces the wholecharge in the furnace to a molten state. Thisblast is heated in what are called stoves.Four of these are shown in Fig. 9, two on…
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