Metallurgical Calculations: Introduction Chemical & Thermal Principles ... Pt. 2
Metallurgical Calculations: Introduction Chemical & Thermal Principles ... Pt. 2
Joseph William Richards
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centages. Heat in the warm charges 189,210 = 2.45 Sensible heat of air used 99,480 = 1 .29 Sensible heat of gas used 360,550 = 4 . 68 Heat of combustion of gas 6,202,300 « 80.44 Heat of oxidation of the bath 833,600 = 10. 81 Heat of formation of slag 24,200 = 0.31 Total 7.709,340 = 100.00 382 METALLURGICAL CALCULATIONS. Heat Distribution. In melted steel at tapping 1,437,900 = 18.65 Decomposition of limestone 9,200 = 0. 12 Sensible heat of slag 238,000 = 3.09 Sensible heat of chimney gases 3,11...8,450 = 40.45 All other losses, not classified 2,905,790 = 37.69 Total 7,709,340 = 100.00 Notes on the Heat Balance Sheet. The warmed charges weighed 1,700 kilos, at 700°, and the cold charges 3,745 kilos at 26°. ^Taking 0° C. as the base line the sensible heat in these is Col. 1,700X0.15X700 = 178,500 3,745X0.11 X 26 = 10,710 Sum = 189,210 The air used contains, at standard conditions, 12,220 m' of air and 171-^0.81 = 211 m' of water vapor. These carry at 26°, heat as follows: Cal. 12,220X0.3037X26 = 98.490 211X0.3439X26 = 990 Sum «= 99,480 The gas used, coming in at 165° C, carries in heat as follows: Cal.
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