. Transactions of the Institution of Mining Engineers . nsumed later. Such, however,Fig. 9.—Beehive Coke. is not the case : the whole of the fuel ignites and burns at a uniform shape of the crucible used in these experiments has littleinfluence on the result, a similar result being obtained in D-shapedmuffles with 400-gramme charges. Fig. 11 shows portions of suchcharges. A test-piece from one of these charges, 072 square inch inarea and inch deep, crushed at 825 pounds. This semi-coke does not possess the quality of toughness to the samedegree as when coke-breeze is mixed with the co
. Transactions of the Institution of Mining Engineers . nsumed later. Such, however,Fig. 9.—Beehive Coke. is not the case : the whole of the fuel ignites and burns at a uniform shape of the crucible used in these experiments has littleinfluence on the result, a similar result being obtained in D-shapedmuffles with 400-gramme charges. Fig. 11 shows portions of suchcharges. A test-piece from one of these charges, 072 square inch inarea and inch deep, crushed at 825 pounds. This semi-coke does not possess the quality of toughness to the samedegree as when coke-breeze is mixed with the coal, but toughness is notso essential in a domestic fuel as it is in blast-furnace coke. Thetoughness, however, can be increased, if desired, by the addition ofbreeze. a large proportion of the faces of each fragment is protectedby very hard coke, the waste in transport will not be considerable, andwill be much less than in the case of ordinary coalite. Another advan-tage is that the fuel is clean to handle, although this is a 1921-1922.] ROBERTS CARBONIZATION OF COAL AT LOW TEMPERATURE. 21 Suitability of Coah for Low-temperature Carbonization.—In theordinary way, swelling coals should be avoided; but if advantage is takenof the above-mentioned processes, any swelling coal may be used success-fully. The cokes shown in Fig. 10 were obtained from, the followingcoals :—Parkgate (a), Thorncliffe (b), No. 2 Rhondda (c). Big Kock {d),Silkstone (e), and Haigh Moor (/). Many other coals have also been
Size: 1168px × 2141px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectmineralindustries
