. Bulletin. increased by the useof briquetted coal. (c) Briquetting appears to have little effect in reducing the quan-tity of cinders and sparks; the calorific value of these, however, isnot so high in the briquetted as in the natural fuel. (d) The density of the smoke with the briquetted coal is much lessthan with the natural coal. (e) The percentage of binder in the briquet has little influence onsmoke density. (J) The percentage of binder for the range tested appears to havelittle or no influence on the evaporative efficiency. (g) The expense of briquetting under the conditions of the expe
. Bulletin. increased by the useof briquetted coal. (c) Briquetting appears to have little effect in reducing the quan-tity of cinders and sparks; the calorific value of these, however, isnot so high in the briquetted as in the natural fuel. (d) The density of the smoke with the briquetted coal is much lessthan with the natural coal. (e) The percentage of binder in the briquet has little influence onsmoke density. (J) The percentage of binder for the range tested appears to havelittle or no influence on the evaporative efficiency. (g) The expense of briquetting under the conditions of the experi-ments adds about SI per ton to the price of the fuel, an amount whichdoes not seem to be warranted by the resulting increase in evapora-tive efficiency. (h) With careful firing, briquets can be used at terminals with aconsiderable decrease in smoke. (i) The briquets appear to withstand well exposure to the weather,and suffer little deterioration from handling. 34 TESTS OF EUN-OF-MINE AND BRIQUETTED 10 20 30 40 SO | 10 10 30 40 MINUTES AND HOURS Fig. 15.—Graphic log, test 1.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
