Device for compacting metalldaempfen, in particular zinkdaempfen

摘要

451,774. Condensing metal vapours. ST. JOSEPH LEAD CO., 250, Park Avenue, New York, U.S.A. Feb. 11, 1935, No. 4364. Convention date, March 8, 1934. [Class 82 (i)] The vapours of volatile metals such as zinc, mercury, cadmium, magnesium, or tin are condensed by being drawn under vacuum through a bath of the liquid or molten metal which is agitated by the passage therethrough of the vapours, which are retarded by a series of baffles on the upper wall of an inclined condensing chamber. In the case, for example, of zinc, a bath of the molten metal in a chamber 1 is supplied with zinc vapour from a duct 2, and is subjected to a vacuum of 6 to 20 inches of mercury by a pump 4, so that the passage of the vapour agitates the molten metal, baffles 5 and 6 being provided to increase the agitation. The uncondensed gases such as CO are drawn off through chamber 3, washed in sprays 9, and collected in a gas holder 11. The temperature of the molten metal is maintained constant by pipes 12 in connection with a cooler 13, circulating pump 16 and furnace 14.