Chemical engineering . cross-section of the fur-nace gradually decreases from the top of the furnace tothe neck 11. the charge is gradually heated up higher untilit reaches the necessary reduction temperature. The reducedmetal then melts 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 and withdrawn fromtime to time through the tap hole, while the layer of slag 18accumulating on top of the metal is withdrawn as metal, or pieces of metal, either of that to be reducedor of an alloying metal
Chemical engineering . cross-section of the fur-nace gradually decreases from the top of the furnace tothe neck 11. the charge is gradually heated up higher untilit reaches the necessary reduction temperature. The reducedmetal then melts 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 and withdrawn fromtime to time through the tap hole, while the layer of slag 18accumulating on top of the metal is withdrawn as metal, or pieces of metal, either of that to be reducedor of an alloying metal, may be introduced into the furnacewith the charge and allowed to percolate down through it forthe purpose of collecting any scattered particles of reducedmetal and carrying them into the body 17. The process andthe several furnaces shown are stated to be suitable for reduc-tion of refractory compounds or mixtures containing two ormore metals, for example, manganiferous iron ores for theproduction of FIG. 2.—PRICE KIRN.\CE. Process of Reducing Metallic Compounds. E. F. Price, Niagara Falls. Patent 790,390, May 23, 1905. Application filed Aug. 31, process is based on the same principle as the precedingone, 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to heat the charge for a relatively short period toits reduction temperature and allowing the metal to be imme-diately withdrawn from the region of the maximum.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. Patent 790,391, May 23, 1905
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmetallu, bookyear1902
