Journal . sthe opening in the cooling cliamber.—A. S. Furnace for roasting ores and metallurgical products with compressed air ; Shaft . W. Buddeus. Ger. Pat. 285,888, Oct. 12, 1913. The furnace is divided into an upper and a lowercompartment by a grate, which is sealed againstthe outer air and is provided with an openingwhich can be closed. The material receives apreliminary roasting in the upper compartmentand is then transferred, through the openingin the grate, into the lower compartment, intowhich comprf ssed air is introduced, and in whichthe roasting is completed. Substances having afav
Journal . sthe opening in the cooling cliamber.—A. S. Furnace for roasting ores and metallurgical products with compressed air ; Shaft . W. Buddeus. Ger. Pat. 285,888, Oct. 12, 1913. The furnace is divided into an upper and a lowercompartment by a grate, which is sealed againstthe outer air and is provided with an openingwhich can be closed. The material receives apreliminary roasting in the upper compartmentand is then transferred, through the openingin the grate, into the lower compartment, intowhich comprf ssed air is introduced, and in whichthe roasting is completed. Substances having afavourable action on the roasting process may beintroduced into the upper part of the lower com-partment.—A. S. Ores ; Roasting sulphur-bearing - Nichols Copper Co., and H. H. Stout, New York. Eng. Pat. 9958. July 8, 1915. Under Int. Conv., July 31, a roasting furnace (see fig.) of the type having an air-cooled, rotary rabblingsystem, the heated air from the latter is discharged. into a central shaft surrounding that from whichthe rabbles are actuated, and conducted thenceto a transverse pipe. 5, extending across the topof the apparatus. The pipe, 5, communicateswith a valved outlet. 8 ; with two or more externalvertical conduits, 9 ; and with pipes, C, locatedon the inside wall of the furnace and opening intothe lowest chamber. The vertical pipes, 9,communicate with the conduit, 10. from whichair is supplied to the central rabble shaft, and also,by short, lateral passages, 11, with the bottomchamber ; the passage of air or gaseous productsinto or out of the furnace is determined andregulated by means of valves a, b, c, d, e, and /,with which the various conduits are provided. —W. E. F. P. Furnace for smelting [lead] ores. C. J. Beaver,Hale, and E. A. Claremont, High Legh, Pat. 6675, May 4, 1915. A HORIZONTAL fumace, for the continuous smeltingof rich lead ores, has a long smelting chamber whichis heated externally so as to form a hot
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
