The Mining Engineer Volume 34.cInstitution of Mining Engineers
The Mining Engineer Volume 34
Author: Institution of Mining Engineers
Number of Pages: 240 pages
Published Date: 01 Mar 2012
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130874198
Download Link: The Mining Engineer Volume 34

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...From the above tables it will be noted that the number of beehive-ovens has decreased from U5,514 in 1905 to U-'!,454 in 190(J, and the recovery and retort-ovens have increased from 5,546 in 1905 to 0,275 in 1906, or a decrease in the first case of about 8 per cent., and an increase in the second case of about 13 per cent. Final Rtport of the Royal Commisxioti on Coal-mipplieA, 1905 Cd. 2353, part i., general report, page 9. t Mint and Qiiarrien: Genf.ral Rtport and Statistic, 1905 Cd. 2974, page 195, and 1906 Cd. 3774, page 180. J Ibid., 1905, page 196; and 1906, page 181. Although no figures are given showing the proportion of coke made in recovery-ovens, for the quantities given in Table I. refer to all coke manufactured, including that made at gas-works, it is possible by a somewhat roundabout calculation to arrive at an approximate estimate. Table IV. gives the production of sulphate of ammonia in each year, and the writer considers the figures interesting for two reasons, namely, (1) they show the increase in the recovery of ammonia as sulphate from cokeworks for the past nine years, and (2) from these figures the approximate calculation to which the writer has referred has been made. Table IV.--production Of Sulphate or Ammonia From 1898 To 1906. From the foregoing table it will lie noticed that the production of sulphate of ammonia from coke-ovens has risen from 5,403 tons in 1898 (the first year for which separate figures are given for coke-ovens) to 43,077 in 1900, or an increase of over 800 per cent., the increase in the last three years being especially noticeable. The yield of sulphate of ammonia may be taken in round numbers as 25 pounds per ton of coal carbonized, either from gas-works or from coke-ovens (possibly 28 or 30 pounds in many case...

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