. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 300 THE ELECTRIC Fig. 5. truck ]> lilU'd with ;i l»l()ck or of calciuni carbide and is then wheeled out of the furnace to discharge its h)ad. Wliih' fusion is in progress a slight reciprocating motion is given to the truck, which serves to shake the charge well down and introduce fresh por- tions of it into the path of the arc proper. The Chavarria-Contardo arc furnace for the manufacture of calcium carbide pos- s
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 300 THE ELECTRIC Fig. 5. truck ]> lilU'd with ;i l»l()ck or of calciuni carbide and is then wheeled out of the furnace to discharge its h)ad. Wliih' fusion is in progress a slight reciprocating motion is given to the truck, which serves to shake the charge well down and introduce fresh por- tions of it into the path of the arc proper. The Chavarria-Contardo arc furnace for the manufacture of calcium carbide pos- sesses several novel ])oints. Its general principle is represented diagrammatically in tig. 5, where e e are the electrodes, run- ning parallel to one another and slightly al>ove the axis of the channel or trough T, which forms the hearth; c e are thin gra})hite plates, built up to form a roof- shaped structure, which I)ecomes itself intensely hot when the furnace is active. The raw^ material is fed in at A, and, pass- ing over the upper surfaces of c c, receives a ])i'elimiiiary heating of no mean degree; it then passes down, taking the course indicated by the dotted lines, under the electrodes e e and into the trough T, where it is su])jected to the most intense reflected heat of the are. The molten carbide formed is drawn off l)y wa}' of the outlet o. The disposal of the gases, especiall}' carl)on monoxide, resulting from the reactions in a carbide furnace has long be(Mi a stumbling block to the manufacturer in that any attempt at modifying the furnace to this end resulted in luidesira- ble complications and increased prime cost. This has been, in a measure, overcome in theFrolich arc furnace for car])ide manufac- ture, invented l)y Dr. Oscar Fro- lich. of Streglitz,Germany. The general arrangement is shown in tig. 6 and consists of a cylin- drical iron cruci])le F, mounted on standards S, and tapering at its base to a central discharge orifice. A lining of lire clay L pr
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Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
