DESIGN OF OPEN-HEARTH FURNACES

' 251

dumber of Furnaces of Each Size
1112121 12

311

xuu 180 170 160 150
-s140
*
^130
J3 120 110 100
90 £0 TO

2
—

—
-
—

3

8

3

—

1

2

—

'

o

10 20 30 40 50 60 70 80 90 100 150 200
Tons, Nominal Capacity of Furnace

FIG. 162.—Graphical Comparison of Chimney Heights of Various Open-hearth

Furnaces,

Number of Furnaces of Each Size
1112222 14 4 11 4 1 1

50

"30

20

1Q

10 20 30 40 50 60 70 80 90 100 150 200
Tons, Nominal Capacity of Furnace
FIG. 163.—Graphical Comparison of Chimney Areas of Various Open-hearth
Furnaces.