| 摘要 |
<p>Wear on the seating of the large bell of a blast furnace is reduced by fitted a tapered skirt ring round the hopper. The ring is secured to the superstructure of the furnace, and its middle part should be 50-600 mm from the hopper wall, while its lower end should be as near as possible to the lower flange of the hopper, about 10-35 mm. The layer of gas between the ring and the hopper reduced the temp. of the hopper by 130-150 degrees C, and the variation of temp. is =80 degrees C compared with 160 degrees C without the skirt.</p> |
