Author: Ernst Otto Röhrig

Publisher: Rarebooksclub.com

Published: 2013-09

Total Pages: 276

ISBN-13: 9781230187990

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1869 edition. Excerpt: ...oxide, carburetted hydrogen) into the blast furnaces by means of the tuyeres, but no favourable results were obtained, as it proved impossible to sustain the high temperature required in the lower parts of the furnace, and as the reduced iron was not sufficiently carbonised. Gurlt's proposal! to reduce the ores in a cupola furnace by means of gases, and to fuse the carbonised iron in a reverberatory furnace, has been successful only in Spain when treating pure rich iron ores. THE BLAST FURNACE AND ITS ACCESSORIES. Lifts.--In hilly countries the blast furnaces are often placed below the general level of the ground supplying the ores and fuel, so that all the materials necessary for working, may be delivered at the furnace top without any special appliances, whilst on flat ground mechanical lifts must be resorted to for raising the materials. The following are the lifts most generally employed: --Vertical Lifts by means of Steam Power.--The apparatus consists of a cage moving between vertical guides, similar to those used in colleries, and is connected with a small diredl acting steam engine of high pressure, which is placed either on the platform surrounding the furnace top, B. u. h. Ztg., 1862, p. 429. f Berggeist, 1856, p. 97. Oesterr. Ztg., 1856, pp. 137, 165, 195; 1858, pp. 245, 292, 310; 1859, p. 2. B. u. h. Ztg., 1856, pp. 223, 235; 1859, pp. 196, 286,319,320,415,420; i860, p. 504. Vordernberg Jahrb., ii., 153. Leob., Jahrb., i860, ix., 317; 1861, x., 356. Bericht lib. d. erste allgem. Versamm. v. B. u. Hiittenmannern in Wien., 1859. p. 54. Hartm, Fortschr., i., 229; ii., 160. + Gurlt, die Roheisenerzeugung mit Gas, &c, Freiberg, 1857. Berggeist, 1857, P 6o6 ' I59) P-469-B. u. h. Ztg., 1857, P-I2 ' i860, p. 27. j Hartmann's...