| 摘要 |
A cupola-type metal-melting furnace, primarily for melting iron for foundries, is run on a fluid fuel and without coke, using a fuel/air mixture at least 10 percent rich in fuel and with combustion outside the furnace shaft; the hot combustion gases pass up the shaft through a heat-exchange bed of refractory material, and the metal charge above the bed melts and is superheated at it passes down through the heat-exchange bed. |
