| 摘要 |
A shaft furnace particularly a blast furnace which is operated at high pressures includes a furnace head having a top pan with a distributor bell therein which is movable upwardly to close the top pan to permit an accumulation of charging material thereover and which may be moved downwardly to provide an annular charging opening for the material to drop off the bell into the furnace. The construction includes a charging hopper which may be arranged above the furnace and located to receive a charge of material, for example, by delivery on a carriage which moves over the skip-type conveyor. The charging hopper includes a lowermost portion with a rotatable distributor pipe which has an eccentric opening to permit the rotatable distribution of charging material downwardly into a locking chamber which is arranged between the hopper and the chamber defined by the top pan of the furnace head which is closed by the distributor bell. The lock chamber includes openable and closeable flaps at its lower end which when closed permit the accumulation of a material in the chamber and it is also sealed in a gas tight manner by a displaceable valve member which is mounted on a pivot shaft so that it can be moved to a position offset from the locking chamber to permit the unhindered downward flow of the material from the lock chamber into the furnace above the distributor bell during charging periods. The top of the lock chamber is closed by a valve member which may be opened by displacing it into an offset chamber portion out of the way of the flowing material to open the passage between the hopper and the lock chamber. the inlet valve to the lock chamber, at the top thereof, is opened when the pressure in the lock chamber returns substantially to atmospheric pressure. The inlet opening and the discharge opening of the lock chamber are advantageously arranged in vertical alignment but may be offset if so desired. |
