| 摘要 |
A housing on top of a shaft-type furnace, e.g. for the direct reduction of iron ore with a reducing gas preferably consisting in major part of carbon monoxide and hydrogen, has a laterally opening inlet and a downwardly opening outlet. Green pellets, e.g. of iron ore, are charged into the housing through the inlet and pass with a minimum free fall into a bucket which is lowered linearly in the housing as a pile of pellets is formed in the bucket so that the top of the pile remains substantially at the same level, adjacent the discharge end of the loading device. Once the bucket has been displaced linearly downwardly to its lowermost position, the pellet feed is stopped and the input is blocked by a pivotal bell. The bottom of the bucket, which is formed by another linearly displaceable but pivotally suspended bell, is then displaced downwardly away from the sides of the bucket and a bell temporarily blocking the outlet is also moved downwardly to allow the mass of pellets in the bucket to spill out and down into the furnace. The bells thus form alternately effective inlet and outlet gates sealing the head of the furnace against the escape of gas.
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