Analysis Of Thermal Stress Of Ladle Purging Plug

In order to improve the efficiency of secondary refining ladle, usually set at the bottom of the ladle bottom blowing argon purging plug, through the role of argon stirring molten steel temperature and composition of effective homogenizing, and non-metallic inclusions in the smooth surface. Purging plug is the secondary refining process on the smooth implementation of the key functions of components, the length of its life Ladle a direct impact on the normal turnover and production costs.Ladle Puring plug in the use of the process of ventilation, the most common damage is the work of the hot side refractory erosion, rupture, resulting in the infiltration of molten steel. The main reason of damage to refractory materials, including chemical erosion, mechanical abrasion and thermal stress. Thermal stress which is caused by damage to the refractory cracking the direct cause of damage. Therefore, the simulation analysis of Puring plugs in various state of the temperature distribution and the resulting stress distribution of refractory materials to enhance the life of purging plug guiding significance.In this paper, 210 metric tons of steel a steel package for the study, the following main elements:(1) the establishment of ladle Puring plug structure breathable three-dimensional finite element model, based on the heat transfer theory, the application of finite element software ANSYS analysis of ladle Puring plug structure permeability state in various stages of the temperature field and stress field distribution, which is conducive to analysis of Ladle Puring plug structure of temperature field, stress field and its distribution;(2) simulation of the ladle Puring plug structure breathable thermal conductivity, thermal expansion coefficient and elastic modulus of ladle Puring plug structure temperature field, stress field, computing studies have shown that the higher the thermal conductivity of refractory materials, ventilation Ladle Puring plug The smaller the temperature gradient, temperature gradient as a result of stress caused by the smaller. Coefficient of thermal expansion of refractories and the greater the modulus of elasticity, air permeability refractory Puring plug work near the hot side have a greater stress.(3) calculation and analysis of ladle Puring plug breathable air between the Puring plug joints, as well as reserved seat Puring plug breathable air ladle Puring plug with Puring plug Puring plug reserved seat engagement seam to calculate the core permeability and temperature distribution of Puring plug blocks and the resulting stress distribution for Block Puring plug Puring plug mill ventilation slit reserved ladle of the masonry and provide a theoretical basis.In this paper, simulation ladle Puring plug temperature field and stress field distribution, to a certain extent, the permeability of ladle Puring plug masonry structure and the production process of guiding significance.