Claims
- 1. An apparatus for melting metal comprising: a shaft furnace having a vertical shaft, a grid located at a lower end of said shaft for supporting metal to be melted and introduced into said furnace, a horizontally extending hearth below said grid, a burner in said hearth, means for supplying a liquid or gaseous fuel to said burner, and means for supplying combustion air to said burner, the metal being melted by combustion products from said burner passed from bottom to top through the grid and shaft and collecting below the grid, and a stack above the shaft and equipped with a recuperator for preheating the combustion air in said means for supplying combustion air, and equipped with a blower for controlling the rate of draft of combustion products through said recuperator to thereby regulate the temperature of the combustion air.
- 2. An apparatus according to claim 1, comprising inlets for supply of an oxygen-containing gas into the furnace shaft above the grid.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3610498 |
Mar 1986 |
DEX |
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Parent Case Info
This is a division of application Ser. No. 023,392, filed Mar. 9, 1987.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3802678 |
Taft |
Apr 1974 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
23392 |
Mar 1987 |
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