高炉の円周方向不均一条件下における固体流れ(高炉内現象)(<特集>製銑技術の拡大と高度化)

概要

論文の詳細を見る
Imbalanced descending behavior of solids in a blast furnace was studied using a three dimensional model furnace, considering the circumferential imbalance of the coke consumption at the raceway zone and the inner surface profile of the furnace wall. Results are summarized as follows; 1) In case that there were some closed tuyeres or the local wall scab at the middle part of the shaft in blast furnace, it was found that the descending velocity above them became larger than that at the other part at the throat. 2) The erosion of the furnace wall only at the upper part of the shaft (h/D<0.4) increased the descending velocity at the throat above the eroded part, where h is the distance from the top of the shaft and D is the diameter of the throat. 3) The peripheral dead zone was formed just above the closed tuyeres, of which geometry was different from that of the central dead zone. Stress analysis made it clear that the stress field in the lower part had the relation of σ_θ<σ_υ<σ_h and the shape of the peripheral dead zone was determined by σ_θ and σ_υ, where σ_υ is the vertical stres, σ_h is the horizontal stress and σ_θ is the circumferntial stress.
社団法人日本鉄鋼協会の論文
1987-11-01