Journal . d gas. Third. To ilisposc the electrodes so as to minimiseadjustment and renewals. Fourth. To [irovide automatic regulation of current andcontinuity of working. 114 SCOTT—PRODUCTION OF NITRATES FROM AIR. [Feb. 15, 1916. Before proceeding to describe my own furnace it willbe an advantage to describe briefly those in use abroad. The Birkdand-Eyde Furnace. The best-known furnace is that due to Birkelandand Eyde. At the Notodden works in Norway there are32 of them of 600 to 1000 each, and at the Saaheimworks there are 8 of 3500 each. The furnace consists naces aie connected in
Journal . d gas. Third. To ilisposc the electrodes so as to minimiseadjustment and renewals. Fourth. To [irovide automatic regulation of current andcontinuity of working. 114 SCOTT—PRODUCTION OF NITRATES FROM AIR. [Feb. 15, 1916. Before proceeding to describe my own furnace it willbe an advantage to describe briefly those in use abroad. The Birkdand-Eyde Furnace. The best-known furnace is that due to Birkelandand Eyde. At the Notodden works in Norway there are32 of them of 600 to 1000 each, and at the Saaheimworks there are 8 of 3500 each. The furnace consists naces aie connected in delta as shown in Fig. 2. Thefull voltage between phases is available at the terminalsof each furnace, and at Notodden thi-s is 5500 and atSaaheim 11,000 volts. A peculiar feature of the arc flames of this furnaceis that in moving along the electrodes they do not doso concentrically but somewhat as shown by the circularbroken lines indicated diagramniatically in Fig. 1e. Dynamo Onf /i flareo/ /Iirlnler no. lA. FIO. IB. Birkeland-Eydc single-phase furnace with magnetic field for blowing the arc flame. of steel castings built up as shown in Fig. 1a and havingbetween them a cylindrical structure of firebrick, shownin black, with a disc-shaped chamber in the centre. Airenters by a pipe at the base of the furnace and passes intothe central chamber by means of a large number of smallholes. After flowing radially through the central reactionchamber it collects in a circular channel just inside theperiphery of the furnace aitft passes to the outlet pipeand away. Two U-shaped electrodes project horizontallyinto the disc chamber from each side, as shown in Fig. are made of copper tubes li in. diam. and about\ in. thick, and the total length of each tube before beingbent into shape is about 20 feet. Each electrode isadjustable vertically and sideways. Arcing tips of ccpperare attached to the rounded ends of each tube, and thesetips are spaced about one-third of an i
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
