高炉のレースウェイ近傍の物流状態に関する力学的解析(モデル解析,高炉その3,<特集号>製銑プロセスの環境調和・資源対応力強化を目指して)

概要

論文の詳細を見る
Stability of particle flows near raceway in blast furnace has been mechanically analyzed using model experiments and simulations using Discrete Element Method (DEM). Results obtained are as follows. (1) Unstable raceway shows that particles above raceway near wall periodically hang and slip. (2) Unstable raceway has long periodical changes about several seconds in addition to short periodical change about several 10ms that stable raceway exhibits. (3) Unstable raceway shows the ratio of the height to the depth is greater than about 1 on the average. (4) Excess enlargement of tuyere diameter or blast volume could lead to unstable raceway. (5) Although increase of input energy from gas into bed raises efficiency of energy transfer from gas to particles, the efficiency is independent on raceway stability. (6) With the objective raceway stability and decreasing generation of fine coke in the raceway, there is appropriate range of conditions in the input gas energy.
2006-12-01