Electrochemical and metallurgical industry . to act as aresistance conductor. As the cross-section of the fur-nace gradually decreases from the top of the furnace tothe neck li, the charge is gradually heated up higher untilit reaches the necessary reduction temperature. The reducedmetal then m^lts and at once drops out of the zone of maxi-mum temperature into the cooler receptacle 12; it may beallowed to accumulate there in a layer 17. and withdrawn fromtime to time through the tap hole, while the layer of slag 18accumulating on top of the metal is withdrawn as metal, or pieces
Electrochemical and metallurgical industry . to act as aresistance conductor. As the cross-section of the fur-nace gradually decreases from the top of the furnace tothe neck li, the charge is gradually heated up higher untilit reaches the necessary reduction temperature. The reducedmetal then m^lts and at once drops out of the zone of maxi-mum temperature into the cooler receptacle 12; it may beallowed to accumulate there in a layer 17. and withdrawn fromtime to time through the tap hole, while the layer of slag 18accumulating on top of the metal is withdrawn as metal, or pieces of metal, either of that to be reducedor of an alloying metal, may he intro<luced into the furnacewith the charge and allowed to p<Tcolate down through it forthe purpose of collecting any scattered particles of reducedmetal and earning them into the body 17. The process andthe »e%eral furnaces shown are stated to be suitable for reduc-tion of rrfrarifirv rompotmds or mixtures containing two or manganiferous iron ores for the. , FIG. -PRICK Fl KNACE. Iroicss of Reducing Metallic Compounds. E. F. Price, Niagara Falls. Patent 79(),,^.X), May 23, 1905. Application filed Aug. 31, process is based on the same principle as the jjrecedingone, namely, to heat the charge for a relatively short period toits reduction temperature and allowing the metal to be imme-diately withdrawn from the region of the maximum. Thefurnaces which are stated to be used are, however, not incan-descent, but arc furnaces; they are provided with a carbonlining, serving as one electrode, and have a central electrode,which depends vertically into the furnace to a point quite closeto the bottom. The arc is sprung at this point, the rest of thefurnace being filled with the charge. The reduced metal fallsdirectly into a .separate vessel, or an annular metal receptaclein the bottom of the furnace, whence it is tapped of Smelting Metallic Compounds.—E. F. Price, Niagara Falls. P
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