Analysis of Effect of Gas Temperature on Cooling Stave of Blast Furnace

• Published in: Journal of iron and steel research, international Vol. 17; no. 1; pp. 1 - 6
• Main Authors: XIE, Ning-qiang, CHENG, Shu-sen
• Format: Journal Article
• Language: English
• Published: Singapore Elsevier Ltd 2010; Springer Singapore
• Subjects: Applied and Technical Physics; Blast furnaces; Bolts; Cooling effects; Displacement; Engineering; Gas temperature; Iron and steel industry; Machines; Manufacturing; Materials Engineering; Materials Science; Metallic Materials; packing layer; Physical Chemistry; Processes; Steels; stress intensity; temperature change rate; temperature variation; Thermal expansion; 中部地区; 位移分布; 冷却管道; 气体温度; 温度升高; 温度变化; 温度梯度; 高炉冷却壁; temperature variation; displacement; stress intensity; temperature change rate; packing layer
• ISSN: 1006-706X; 2210-3988
• DOI: 10.1016/S1006-706X(10)60035-0

In order to study the effect of gas temperature variation on cooling stave, temperature, stress and displacement distributions of cooling stave were analyzed respectively when gas temperature inside- blast furnace increases from 1000 to 1 600 ℃. The results show that the temperature field on cold side is under control of cooling pipes and hardly changes when gas temperature increases. The temperature gradient and change rate with time near hot sides are greater than those in other regions and the later can reach 100 ℃/s. The stress intensity near middle area of hot surface is up to 400 MPa and that＇s why there are lots of cracks at this place. The edge of stave is bent to cold side and middle regions between fixed bolts and pin moves to hot side. The displacement around fixed pin is smaller but larger on the edge and the maximum is located on hot side of top surface. The maximum displacement in z direction is about 4 mm and 3 mm in y direction. If the expansion coefficient of packing layer is 1/4, the thickness of packing layer between the cooling staves is 32 mm and 24 mm between sides up and down.