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228

APPENDIX VII



Taking up the design computations for a 50-tonne open-
hearth furnace regenerator, the following assumptions are made:

Melting capacity of furnace........................    50 tons

Number of heats made per week...................    15

Average time per heat, charge to tap...............      8 hours 20 minutes

Coal consumption per ton of steel..................  300 kg (660 Ib)

.Average number of reversals per hour....:..........      3

Secondary air supply, per cent of theoretical.........      140

GASES OF COMBUSTION ON BURNING 100 VOLUMES OF HAW PRODUCER GAS


	Vol.                Calories
	02
	C02
	H2O
	N2

H2
	11 26X 58 2= 655
	5 63
	
	11.26
	22.52

CH4 CO
	3.24X195.2= 632 . 29 65 X 68 2=2022
	6.48 14 83
	3.24 29 65
	6.48
	25.92 59.32

O2
	0 19
	
	
	
	

CO2
	1 25            .
	
	1.25
	
	

N2
	50 69      ......
	
	
	
	

H2O
	3 72
	
	
	3 72
	


	
	
	
	
	


	100.00                 3309
	26.94 0.19
	34.14
	21.46
	158.45 0.76


	
	26.75
	34.14
	21.46
	157.69

COMBUSTION OF 100 MOLECULAR VOLUMES OF GAS

Air

Products of Combustion in Molecular Volumes

Supply, Per
	Molecular
	Excess
 Air
	02
	C02
	H20
	Excess
	N2
	Total

Cent
	Volumes
	
	
	
	
	2
	
	

100
	133.75
	0.00
	0.00
	34.14
	21.46
	0.00
	157.69
	213.29

120
	160.50
	26.75
	5.35
	34.14
	21.46
	21.40
	179.09
	240.09

140
	187.25
	53.50
	10.70
	34.14
	21.46
	42.80
	200.49
	266.79

180
	240.75
	107.00
	21.40
	34.14
	21.46
	85.60
	243.29
	320.29

These values may be evaluated as cubic feet, cubic meters, etc.

A portion of this air is required for the oxidization of certain
elements in the charge and additions.

4 1
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