Coupled Numerical Simulation Of Flow-Temperature Field And Investigation Of Stress Field About Full Eccentrical Cross-Flow BF Tuyere

Blast furnace tuyere is an important equipment of ironmaking. The reliability of the tuyere is directly related with the production stability and productivity of BF, so it is very important to prolong the service life of tuyere. Currently, the cross-flow tuyere is widely used in Ansteel, Baosteel and other metal companies. Blast tuyere work in the poor environment and have complex structure. It is difficult to theoretical calculations for complex cooling water flow pattern, but with development of Computational fluid dynamics and Heat transfer and with appearance of every numerical algorithm, it is possible to theoretical analysis. Based on practice in Ironmaking Plant of New AnSteel Co.,Ltd., 3D numerical simulation of flow-temperature coupled field and stress-field about the full eccentrical cross-flow BF tuyere were made and effect of cooling water parameter and structure on the service life of full eccentrical cross-flow BF tuyere was investigated, which had important theoretical and practical significance for studing performance of tuyere and prolonging the service life of tuyere. Based on these theories, the following aspects are researched.Velocity and pressure changes of cooling water and influence of cooling water volume of flow on velocity in nose of tuyere and outlet pressure were studied. Appropriate cooling water parameter was established. By simulating, Flow trajectories and the cooling dead area was found in the front of flow separator, through structural optimization the cooling dead area was eliminated. when change semicircular cooling watercourses in nose to Semi-elliptic, 3D numerical simulation of flow-temperature couple about the full eccentrical cross-flow BF tuyere were made.Temperature of tuyere nose and stress of weld position were studied, which accord with burning in tuyere nose and cracking in weld position in actual situation. And influence of cooling water velocity and cooling water temperature on maximum temperature in nose of tuyere and maximum stress at weld in tuyere body were studied, which provides theoretical basis for designing and improving of the full eccentrical cross-flow BF tuyere.