Transactions . their iron and to make up their mixtures from the appearanceof the open fracture, will undoubtedly object to the casting inchills, which deprives them of their accustomed guide for con- 38 THE HANDLING OF MATERIAL AT THE BLAST-FURNACE. ducting their operations. But if the foundryman would followthe example of the blast-furnace manager, who invariablyjudges his metal from the appearance of the fracture of a sam-ple cast in an iron chill, he would find such a fracture more re-liable and less variable than that of the slowly-cooled Besides, it is to be hoped that the pro
Transactions . their iron and to make up their mixtures from the appearanceof the open fracture, will undoubtedly object to the casting inchills, which deprives them of their accustomed guide for con- 38 THE HANDLING OF MATERIAL AT THE BLAST-FURNACE. ducting their operations. But if the foundryman would followthe example of the blast-furnace manager, who invariablyjudges his metal from the appearance of the fracture of a sam-ple cast in an iron chill, he would find such a fracture more re-liable and less variable than that of the slowly-cooled Besides, it is to be hoped that the progress of the iron-castingindustry will be such, that before long the assistance of thechemist and the laboratory will be as helpful and indispensablein the foundry as it is to-day in the steel-plant or at the blast-furnace. THE HANDLING OF MATERIAL AT THE BLAST-FURNACE. 39 In dealing with the blast-furnace cinder, our methods to-dayare nearly perfect. As late as in 1883 it was still customary atmost blast-furnaces to form rough moulds in slag, on what usedto be called the cinder-wharf. Into these the hot cinder wasrun. It was broken before cooling and loaded on dump-carsby manual labor, or it was formed into round cakes, often withan iron staple cast into the center of each cake, for conveniencein handling. The cakes were lifted by a swinging crane andloaded on cars. Men were required to prepare the moulds and Fig. 25.
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
