Structure Optimization of Ladle Bottom Based on Finite Element Method
Ladle is an important container in metallurgy industry, and its lifetime is very important for the natural production of enterprise. The stand or fall of refractory lining of ladle decides its lifetime, yet thermal stress is the direct reason of causing refractory lining breakage. In this paper the structure of ladle mainly by changing the structure of bottom with finite element method is designed, and three scheme models are put forward. By analyzing and comparing stress field of the three ladle models, finally an optimization scheme is put forward. The experiment results indicate that the lifetime of ladle gains obvious increasement, and the rationality and practicability of the scheme have been proved. The method is feasible to improve ladle's lifetime.
Finite Element Analysis of 100 t Hot Metal Ladle in Process of Tipping
Hot metal ladle is an important part in continuous casting production line and its stress distribution has direct influence on its life. In the process of design and calibration of the large-sized hot metal ladle, it is of great significance to determine the stress distribution of each part of the ladle for safely and reliably running the device. Based on 100 t hot metal ladle which is designed by Baotou Iron and Steel Group, simulation of stress field was made by finite element software ANSYS 10.0 from different dumping angles. Through modeling, loading, restricting and calculating, strain and stress field distribution of the hot metal ladle were acquired. Finally, an assessment of strength and stiffness was made on the hot metal ladle. The results show that in the process of tipping for the hot metal ladle, maximum stress is 132 MPa and maximum strain is only 0.064%; maximum stress and strain have appeared in the stiffener plate which is located at the bottom of the trunnion, and strength and stiffness are qualified. The method, which is convenient and practical, reasonable and reliable, provides theoretical evidence for checking analysis and further optimal design of the hot metal ladle.
Development and application of a thermal model for the relined ladle in China Steel Corporation
Refractory-lined ladles are utilized in transporting the molten steel from a converter to a continuous casting machine in the steelmaking process. A proper heating schedule for the ladle dryer will be in practice desirable for energy saving and the production of higher-quality steels. This work develops a thermal model to dynamically simulate the thermal response in the walls of relined ladles after bricking, and the temperature drop of molten steel. After being validated by the in situ measurement from the practical heating process, this model is illustratively applied to determine the proper heating schedule of the ladle dryer and the blown-end temperature for converter for various operation condition in the steelmaking plant of China Steel Corporation.