Numerical Simulation of Effect of Tuyere Angle and Wall Scaffolding on Unsteady Gas and Particle Flows Including Raceway in Blast Furnace
スポンサーリンク
概要
- 論文の詳細を見る
We have performed the numerical simulation for the particle and gas flows in the raceway region in a blast furnace of which dimension is almost the same as that of the commercial blast furnace using Distinct Element Method for the computation of the multi-body interaction among coke particles, Hard Sphere Model for two body interaction of powder particles based on Direct Simulation of Monte-Carlo Method, and Finite Difference Method for the numerical analysis of Navier–Stokes equations with the interaction terms between gas and particles for the gas flows. In the present simulation we have calculated the particle and gas flows in the raceway regions in which tuyere angles are 0, 3, 7 and 11 degree downward. The downward inclination of tuyere means that the air injects to the higher pressure side. This would stabilize the air flow and the raceway would become stable. However if the inclination angle is too high, the flow becomes unstable by various conditions near the bottom of blast furnace. The coke particle flow rate from the center region of blast furnace and its flow width increase with increasing the tuyere downward angle from the horizontal and attains the maximum value at near 7 degree. It means that the coke particle flow becomes widely uniform at about 7 degree tuyere angle except the region near the furnace wall.We have also calculated the effect of scaffolding on the furnace wall on the particle and gas flows. The coke particle flow distributions with scaffolding on the wall become narrower. The scaffolding is nearer to the raceway, the effect of that becomes stronger. The raceway is not spherical and becomes unstable in cases with scaffolding on the wall. The coke particle velocity becomes higher by the narrow coke particle flow distribution caused by the existence of the scaffolding on the wall and it concentrates coke particles on the upper part of raceway near the furnace wall. The coke particle flow is dammed by the scaffolding and the wide area in which the coke particle velocity is very low is formed on the scaffolding. The gas flow distribution with scaffolding becomes non-uniform, particularly in the area between the softening melting cohesive zones and the scaffolding due to their interaction. The gas flow is also dammed up by the scaffolding and softening melting cohesive zones. The existence of scaffolding near softening melting cohesive zones strongly affects the gas flow.
- 社団法人 日本鉄鋼協会の論文
- 2007-05-15
著者
-
Yuu Shinichi
Ootake R And D Consulting Office
-
Yuu Shinichi
Ootake R. And D. Consulting Office
-
KADOWAKI Masatomo
Engineering Research Center, Nippon Steel Corporation
-
UMEKAGE Toshihiko
Kyushu Institute of Technology, Department of Mechanical Engineering
-
KADOWAKI Masatomo
Kyushu Institute of Technology, Department of Mechanical Engineering
-
YUU Shinichi
Ohtake R&D Consultant Office
-
Umekage Toshihiko
Department Of Mechanical Engineering Graduate School Of Engineering Kyushu Institute Of Technology
-
Umekage Toshihiko
Graduate School Of Engineering Department Of Mechanical And Control Engineering Kyushu Institute Of
-
Kadowaki Masatomo
Engineering Research Center Nippon Steel Corporation
-
YUU Shinichi
Ohtake R&D Consultant Office
関連論文
- Effect of Particle Existence on Low Reynolds Number Gas-Particle Free Jet(Re=800)
- Numerical simulation for blockage of cohesive particles in a hopper using the distinct element method and its correlation with experimental results of real cohesive granular materials
- Analysis of Traveling Behavior of Nut Coke Particles in Bell-type Charging Process of Blast Furnace by Using Discrete Element Method
- Effect of Chute Angle on Charging Behavior of Sintered Ore Particles at Bell-less Type Charging System of Blast Furnace by Discrete Element Method
- Validation of Particle Size Segregation of Sintered Ore during Flowing through Laboratory-scale Chute by Discrete Element Method
- Numerical simulation of the velocity and stress fields for a flowing powder using the smoothed particle method and experimental verification
- Constitutive Relations Based on Distinct Element Method Results for Granular Materials and Simulation of Granular Collapse and Heap by Smoothed Particle Hydrodynamics, and Experimental Verification
- Constitutive Relations and Computer Simulation of Granular Material
- Development Process of Turbulence in a Round-Nozzle Air Jet
- Direct Numerical Simulation for Three-Dimensional Gas-Solid Two-Phase Jet Using Two-Way Method and Experimental Verification
- Numerical Simulation of Particle Agglomeration and Bed Shrink in Sintering Process
- Numerical Simulation of Particle and Air Velocity Fields in Raceway in Model Blast Furnace and Comparison with Experimental Data (Cold Model)
- Large Scale Simulation of Coke and Iron Ore Particle Motions and Air Flow in Actual Blast Furnace
- Numerical Simulation of Effect of Tuyere Angle and Wall Scaffolding on Unsteady Gas and Particle Flows Including Raceway in Blast Furnace
- Numerical simulation for the friction mechanism of a powder bed using two-dimensional distinct element method
- Measurements of Turbulent Coagulation Process in Turbulent Flow and Comparison with Calculated Results
- Simulation of Sintering Process -Effects of Air Flow, Liquid Film Cohesion Force and Fixation Process on Large Scale Crack-
- Numerical Simulation of Blast Furnace Raceway Depth and Height, and Effect of Wall Cohesive Matter on Gas and Coke Particle Flows
- Simulation of Sintering Process : Effects of Air Flow, Liquid Film Cohesion Force and Fixation Process on Large Scale Crack