CAE Analysis Of Sliding Gate Of Ladle

With the rapid development of computer technology and improvement of finite element analysis software, CAE technology has been widely used in engineering. In the design of metallurgical equipment, some problems of the equipment such as the strength and stiffness can be accurately analyzed with CAE technology, which can provide important information for the design of the structure.Sliding gate is an important part of the ladle, which is a security, stable and reliable equipment and can pour the high temperature molten steel of the ladle into the middle package. It is directly connected with the operation of continuous casting steel, and the level of its service life, the quality of its service effect, which have an important impact on the continuous casting production.The thesis comes from production practice, relies on system CAE technology, bases on the use of heat transfer knowledge and coupled thermal stress analysis theory. The transient temperature field and thermal stress field of the sliding gate of ladle during the continuous casting are simulated with the software ANSYS. The results show that:1) In the process of casting, the temperature of the down sliding plate is gradually spread as the center hole, the closer distance of the casting hole, the greater the temperature gradient. And in the vertical direction, the temperature change is greater than the horizontal direction. The temperature gradient of the down nozzle has significantly stratification in the radial direction, but in the axial direction, which is large at the region from the bottom to the neck wall.2) In the process of casting, there is a compressive stress area around the casting inner hole of the down sliding plate, tensile stress has a ring distribution around the casting hole. In the key points of horizontal direction, the first principal stress of key point B has a maximum value of 37.91MPa, and in the key points of vertical direction, the first principal stress of key point I reaches a maximum value of 48.46MPa at casting time of 300s. Therefore, reducing the vertical position of thermal stress is also important while reducing the horizontal position of thermal stress of the down sliding plate. The transient first principal stress of the down nozzle decreases in radial direction, while changes little in axial direction. And the stress near the region at the neck part of key point E changes greatly.3) Different pressure loads which are imposed by the disc spring of sliding gate mechanism have very little effect on thermal stress, which can not be considered.4) System CAE technology can be used to simulate the complex modeling of metallurgical equipment, and calculate in different load conditions to obtain the overall performance of the analyzing object, which can provide reference information for equipment in scientific maintenance and future design improvement.