. The railroad and engineering journal . position of the blast are so varied or maintained as may be nec-essary to secure the desired result. By the operation above described, I can readily avoid thetendency to overoxidation that results at the beginning of therapid process of conversion from the inertia of the metal, thesluggishness of its movements, and from the dilTiculty of im-parling to it the desired speed of gyration by a blast appliedlocally at the surface, without also supplying an excess of theoxidizing agent. The claims in the patent specifications are as follows : I. The within-des
. The railroad and engineering journal . position of the blast are so varied or maintained as may be nec-essary to secure the desired result. By the operation above described, I can readily avoid thetendency to overoxidation that results at the beginning of therapid process of conversion from the inertia of the metal, thesluggishness of its movements, and from the dilTiculty of im-parling to it the desired speed of gyration by a blast appliedlocally at the surface, without also supplying an excess of theoxidizing agent. The claims in the patent specifications are as follows : I. The within-described improvement in the conversion ofcrude iron into malleable iron or stetl, consisting in applying ablast of air to the surface portion of a body of molten metal ata maximum pressure at the beginning of the operation for thepurpose of overcoming the inertia of the metal and impartingthereto the proper speed of gyratory motion, lowering the levelof the blast as the process continues without carryingit into the :^ The mass of metal constituting the bath X is passed in amolten form into the converter .4, as usual. The latter is tiltedso as to carry the surface of the metal to the tuyeres <!, as shownin fig. I, that the converting-blast may be thrown upon the sur-face of the metal. In order to vary the volume and pressure of the blast forthe purpose desctibed, I throttle the passage through which theair is conducted to the tuyeres in any suitable manner—as, forinstance, by an ordinary valve controlled in its position by ahandle, /—and while different means may be employed for vary-ing the height of the blast in respect to the normal surface ofthe metal, I prefer to effect this result by tilting the converter todifferent positions during different stages of the , at the beginning of the operation, the converter is tiltedso that the blast, which is then at its maximum pressure, is ap-plied upon the surface in such manner as will overcome as body of the in
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
