3 Caloric carried in by Blast. 5.071 × 454°,5 × 0.239 = 551. Caloric produced in the Furnace. Caloric due to CO2 (11 my—b) × 8080 = (0-2555 — 0-0495) × 8080 = 1664 cals. Caloric due to CO. 3 y x 26730lb 7995 x 2473 1977 " 7 Caloric produced by 1.0055 of carbon (a -·03) =3641 cals. Which gives as the caloric really developed 0·45 of the calorific power of the coke consumed. These 3641 calories are divided between the two zones of the furnace as follows: The carbon burned in the zone of reduction given by: 0.302 + b 3 11 my = 01b.302 + 0.0495 0.2555 = 0.096 = and therefore the carbon burned near the twyres 1.0055 0lb.0960-9095, and the caloric produced in this region, The caloric generated in the zone of reduction arises from Caloric produced in the zone of reduction 4192 Total caloric received by the furnace On the other hand, the caloric absorbed is composed of, (1.) reduction of ores and fusion of pig-iron, according to § 11 (2.) For the fusion of slags, § 12 Decomposition of limestone Evaporation of water of coke Decomposition of 2314 cals. 0lb 960 × 550 = 528 cals. 0.412 × 373.5 = 154 0.029 × 606= 18 (3.) For the sensible heat of the gases (§ 13), (4.) Loss by radiation and evection, etc. (difference) 320° Total equal to the caloric received 4192 cals. § 20. Fifth example.-This is the blast furnace No. 4 of Consett, smelting like the preceding one, a mixture of calcined Cleveland and red hematite of Cumberland ores. elements of this furnace are: Height 55 feet, and capacity 10,200 c. feet. The The mean yield is 60 tons of Nos. 4 and 5 in 24 hours, or 195 c. feet per ton of pig-iron. Coke consumed per ton 0-900 ton, or pure carbon 0-819. And hence per lb. of pig-iron yielded : The analysis of the gases gave m = 0·623. Applying the formulas of § 7 we find, Weight of Gases. 3 = my. 11 do. do. 0.6000 Total carbon 0-8375 × 8080 (0·2375 — 0·0485) × 8080 = 1527 cals. = × 2473 = 0.600 x 2473 7 Caloric due to CO. Caloric produced by 0.789 of carbon= (a−0·03) = 3011 = 3816 Which gives for the caloric really produced in the furnace 0.47 of the calorific power of the coke consumed. The 3011 calories are divided as follows between the two zones of the furnace: The carbon burned in the zone of reduction is 0.302b 3 · my = 01b ·302 + 01b ·485 — 0lb·2375 = 0.113 11 and therefore the carbon burned near the twyres, 0lb -789-0.113 = 0.676, and the caloric produced in this region, 0.676 × 2473 = 1672 cals. The caloric generated in the zone of reduction arises from Caloric produced in the zone of reduction. which, en résumé, gives 279 cals. = 1060" 3654 cals. Total caloric received by the furnace . On the other hand, the caloric absorbed includes, (1.) For reduction of ores and fusion of iron (§ 11) constant (2.) For fusion of slags, decomposition of lime, etc., § 12: = 522 cals. Fusions of slags. 0.950 x 550 (3.) For the sensible heat of the gases (§ 13), 2314 cals. Hence loss by radiation, evection, etc. (difference) 275 |