分析了我国目前竖炉存在的问题，提出了外燃式圆形球团矿焙烧竖炉的设想，并对其结构特征和优点进行了介绍。
With analyzing the problems existing in shafts of our country, a kind of round externa combustion pellet roasting shaft is envisaged and its structural characteristics and merits are introduced.
计算结果表明：由于燃烧器布置在前后墙，使得燃烧器喷口连线成矩形，从而使得炉内气流流场均为椭圆形，且椭圆的长轴沿炉膛高度方向不断变化；
The results showed that, the arrangement of burners on the front and back walls led too val rotation flow pattern, the long axis of which directed diversely along with the height of furnace.
为减少磨损，沸腾炉内蒸发管采用加焊半圆形钢板防磨。
Semicircle steel sheets were welded on the wall of evaporation pipes in fluidized bed roaster for anti-abrasion.
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