Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . lutions per minute being a convenient rate. Assuming that the pan is fairly red-hot before theintroduction of the metal, no gas is required. Thecharge being thus put in motion, the next thing is toadd the fettling in the shape of ground oxides, in acold state or slightly healed. Melted fettling is notemployed at all. The oxides are simply sprinkledgradually on to the surface of the metal, which rollsup the granulated particles among its mass, and rap-idly becomes thereby of a th
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . lutions per minute being a convenient rate. Assuming that the pan is fairly red-hot before theintroduction of the metal, no gas is required. Thecharge being thus put in motion, the next thing is toadd the fettling in the shape of ground oxides, in acold state or slightly healed. Melted fettling is notemployed at all. The oxides are simply sprinkledgradually on to the surface of the metal, which rollsup the granulated particles among its mass, and rap-idly becomes thereby of a thick pasty consistence,emitting carbonic-oxide flames abundantly. It thenpresently rises in temperature, owing to its own in-ternal chemical action, and becomes liquid again, butnot with the usual appearance. The whole of themetal has assumed a granulated condition, swimminglike rice grains in a bath of cinder. The carbon con-tinues to escape in flames, but without boiling, untilthe grains get viscous, and have a tendency to sticki. From this point to the end of the process,the rate of revolution should not be more than twoper minute. Still no gas, or ver
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