Thermal Stress Analysis of BOF Accounting for Friction Force Experimentally Measured

スポンサーリンク

概要

• 論文の詳細を見る

• Thermal stress simulations by the finite element method (FEM) are widely used to analyze refractory damage caused by mechanical factors. Issues studied by FEM simulation of refractories include joint conditions, and friction between refractories. The static friction coefficient and dynamic friction coefficient between MgO–C refractories with various surface conditions were measured. And the effects of joint conditions and friction force on the thermal stress analysis of the refractory lining in the barrel and cone of the converter were investigated numerically. The results are summarized as follows.(1) The friction coefficient between refractories that had various surface conditions was measured. As a result, a static friction coefficient of 0.52 and a dynamic friction coefficient of 0.42 were obtained for the friction working between the surfaces of baked MgO–C refractories.(2) It is necessary to consider friction force in the thermal stress analysis because local abnormal increases in stress occur, corresponding to large displacement of the bricks. Considering the situation of wear brick in operation, it was appropriate to apply for the value of baked brick as a friction coefficient.(3) The effect of the joint conditions used here, which were contact element, gap element, and anisotropy of mechanical property, on the results of calculations of thermal stress by FEM was comparatively smaller than that of friction force when friction force was considered. If the logic of displacement and stress transmission on two bricks is considered, contact element is appropriate from the viewpoint of stress transmission.

• 2010-08-15

著者

• Hino Yuta

  Slag And Refractories Dep. Steel Res. Lab. Jfe Steel Corp.

• KIYOTA YOSHISATO

  Slag & Refractories Research Dept., Steel Research Laboratory, JFE STEEL CORP.

• Hattori Yoshimitsu

  Jfe Sekkei Ltd.

• Kiyota Yoshisato

  Slag And Refractories Department Steel Research Laboratory Jfe Steel Corporation

• HINO Yuta

  Slag & Refractories Research Dept., STEEL RESEARCH LABORATORY, JFE Steel Corporation

関連論文

• Effect of Iron Oxide Feeding Rate and Hot Metal Temperature on Dephosphorization Rate in Torpedo Car
• Thermal Stress Analysis of BOF Accounting for Friction Force Experimentally Measured
• Evaluation of Resistance to Cyclic Thermal Shock of Coke Oven Brick
• Fatigue Failure Behavior of Al2O3–SiO2 System Bricks under Compressive Stress at Room and High Temperatures
• Fatigue Failure and Thermal Spalling Tests to Evaluate Dynamic Fatigue Fracture of MgO-C Bricks
• Fatigue Failure Behavior of Al_2O_3-SiO_2 System Bricks under Compressive Stress at Room and High Temperatures

スポンサーリンク