JP2011231409A5

JP2011231409A5 -

Info

Publication number: JP2011231409A5
Application number: JP2011152752A
Authority: JP
Filing date: 2011-07-11
Publication date: 2012-01-05
Anticipated expiration: 2018-02-13

Description

［1］炉高方向で炉下部側から順に朝顔部、切立部およびシャフト部を備え、且つ炉下端側に羽口を備え、羽口から微粉炭吹き込みを行う高炉の炉高方向において、熱負荷が小さい炉上部・中部領域(A)には鋳鉄製ステーブを配置し、それよりも下方の熱負荷の大きい領域であって、溶融スラグ生成開始領域および溶融スラグ存在領域である炉下部領域(B)と溶融スラグ存在領域である炉最下部領域(C)には、ステーブ表面に溶融スラグが接触すると凝固して凝固スラグ層が生成する銅または銅合金製ステーブを配置したステーブ配置構造であって、
前記炉下部領域(B)が、朝顔部の上部領域、切立部の全部領域およびシャフト部の下部領域であり、前記炉最下部領域(C)が、羽口上方における朝顔部の下部領域であることを特徴とする高炉のステーブ配置構造。 [1] Heat load in the furnace height direction of a blast furnace with a morning glory part, an upright part, and a shaft part in the furnace height direction and a tuyere on the lower end side of the furnace and pulverized coal blowing from the tuyere A cast iron stave is disposed in the upper and middle regions (A) where the furnace is small, and the lower region of the furnace (B ) And the lowermost furnace area (C), where molten slag exists, is a stave arrangement structure in which copper or copper alloy staves that solidify and form a solidified slag layer when molten slag contacts the stave surface. ,
The furnace lower area (B) is the upper area of the morning glory part, the entire area of the upright part and the lower area of the shaft part, and the furnace lowermost area (C) is the lower area of the morning glory part above the tuyere. A blast furnace stave arrangement structure characterized by that.

Claims

Furnace with a small heat load in the furnace height direction of the blast furnace with a morning glory part, a vertical part and a shaft part in the furnace height direction and a tuyere at the lower end of the furnace and pulverized coal blowing from the tuyere Cast iron staves are placed in the upper and middle areas (A), and the area below the area where the heat load is large is the molten slag generation start area and the molten slag existing area and the lower furnace area (B). In the furnace lowermost region (C), which is the slag existence region, is a stave arrangement structure in which a stave made of copper or copper alloy that solidifies when molten slag comes into contact with the surface of the stave to form a solidified slag layer,
The furnace lower area (B) is the upper area of the morning glory part, the entire area of the upright part and the lower area of the shaft part, and the furnace lowermost area (C) is the lower area of the morning glory part above the tuyere. A blast furnace stave arrangement structure characterized by that.