Bulletin . e less than1,500° C. For ashes that soften at a temperature higher than 1,500°C, it is permissible to run pure hydrogen through the furnace, as theiron oxide content is so low as to have little effect on the fusibility. DESCRIPTION OF FURNACE AND SATURATOR. The furnace and saturator are shown in Plate IV, A. The detailsare given in figures 2o and 27. The furnace consists in part of anouter shell of No. 14 B. & S. gage sheet iron, 7 inches in diameter and11 inches long, autogenously welded, gas-tight at the seams, and hav-ing at the front a circular 1-inch flange perforated for six e
Bulletin . e less than1,500° C. For ashes that soften at a temperature higher than 1,500°C, it is permissible to run pure hydrogen through the furnace, as theiron oxide content is so low as to have little effect on the fusibility. DESCRIPTION OF FURNACE AND SATURATOR. The furnace and saturator are shown in Plate IV, A. The detailsare given in figures 2o and 27. The furnace consists in part of anouter shell of No. 14 B. & S. gage sheet iron, 7 inches in diameter and11 inches long, autogenously welded, gas-tight at the seams, and hav-ing at the front a circular 1-inch flange perforated for six equallyspaced bolts. Between this flange and the circular end plate, both ofwhich are made of |-inch sheet iron, is placed an asbestos gasket,TV inch thick, painted with a thick mixture of powdered graphiteand glycerin. This end plate and flange are drawn together suffi-ciently tight to produce a gas-tight connection. The mixture of hy-drogen and water vapor enters the shell through a ^-inch horizontal.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
