DESIGN  OF OPEN-HEARTH FURNACES

'   251

311
dumber of Furnaces of Each Size
1112121        12

xuu
180
170
160
150
-s^140
*
^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.