高炉レースウェイ近傍の粉コークスの堆積挙動からみた適正羽口風速

DOI Web Site Web Site 被引用文献9件 参考文献1件

書誌事項

タイトル別名
  • Desirable Blast Velocity from the View Point of Fine Coke Deposit around Blast Furnace Raceway
  • コウロ レースウェイ キンボウ ノ フンコークス ノ タイセキ キョドウ カラ

この論文をさがす

抄録

Using a two-dimensional model of the lower part of a blast furnace and a raceway hot model, the formation of raceway and furnace core and the coke degradation have been studied to clarify the desirable blast velocity of a blast furnace. The results obtained are summarized as follows.<BR>(1) The reliable raceway penetration DR(m) is derived as shown by the equation below, and it is estimated that the penetration in large blast furnaces is about 1.4 m.<BR>DR=5.00 Dt·ut√(Pb+1)/{ρc·dp·(Tb+273)}<BR>In the equation, Dt, is tuyere diameter (m), ut is blast velocity (m/s), Pb is blast pressure (kgf/cm2, gage), ρc is apparent density of coke (kg/m3), dp is mean size of coke (m), and Tb is blast temperature (°C).<BR>(2) The amount of fine coke deposit in the raceway increases to a great extent and the temperature in the lower part of a blast furnace decreases when the raceway penetration exceeds 1.3 m.<BR>(3) The upper limit of blast velocity ut (m/s) is estimated by the equation under below any conditions of equipments and operations of a blast furnace. According to the calculation based on this equation, the decrease of blast velocity in about 30 m/s causes the reduction of the raceway penetration of 0.1 m, and blast velocity should be decreased in inverse proportion to productivity when productivity increases.<BR>ut≤920(804-Mb)·ρc·dp·Nt·DR2/(γ·vp·Vi)<BR>In this equation, Mb is blast moisture (g/Nm3), ρc is apparent density of coke (kg/m3), dp is mean size of coke (m), N, is number of tuyeres (-), DR is raceway penetration (m), γ is productivity (t·d-1·m-3), vp is blast volume per ton of hot metal (Nm3/t), and Vi is inner volume of a blast furnace (m3).

収録刊行物

  • 鉄と鋼

    鉄と鋼 73 (15), 1980-1987, 1987

    一般社団法人 日本鉄鋼協会

被引用文献 (9)*注記

もっと見る

参考文献 (1)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ