| 摘要 |
<p>This invention relates to a device for preheating of scrap which is to be charged into an electric arc steel furnace. This consists of a heat exchanger (1) which is provided with inlets (2, 4) and outlets (3, 5) for the furnace gas and drying air respectively. The electric arc steel furnace and the heat exchanger (1) are thus connected to each other by an exhaust conduit (6). In the heat exchanger, drying air is heated and conducted to a scrap bed (11) intalled in a container (10). In order to reduce the heat losses and the need for external insulation the heat exchanger (1) and the container (10) are arranged according to the invention adjacent to each other and provided with a common insulated wall (13) surrounding both units and forming an outwardly limited and insulated space (14) which in its entirety encloses the duct (9) from the secondary (5) of the heat exchanger and the container. The said duct (9) can consist of the free space between the heat exchanger and the container. The heat exchanger ducts for the furnace gas are preferably made of straight, adjacent, parallel-disposed pipes (16), connected at their ends to collecting boxes (18, 19).</p> |
