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采用SolidWorks Simulation热力仿真模块对RH真空槽离线加热至1 300℃后吊运至工作位安装的新工艺进行设计分析。建立真空槽壳体及耐材的有限元模型,分析以1 300℃预热真空槽20、96h以及预热至稳态共3种初始工况下再自然冷却30 min过程中真空槽的温降特性。结果表明,预热20h条件下,耐材蓄热不足,30 min自然冷却后真空槽上部耐材内壁不足800℃,不能满足生产需要;真空槽预热96 h以及预热至稳态条件下,30 min自然冷却后真空槽内各区域温度均高于800℃,满足生产需要,且预热96 h并吊运安装30 min后真空槽外壳表面温度的仿真计算值与现场实测值基本一致。考虑到经济性,生产中应采用预热96 h的方案。
SolidWorks Simulation thermal simulation module RH vacuum tank off-line heating to 1300 ℃ after lifting to work place installation of new technology design and analysis. The finite element model of the vacuum chamber shell and refractory was established. The temperature drop of the vacuum chamber during preheating the vacuum chamber at 1 300 ℃ for 20, 96h and preheating to steady state for a total of three initial conditions and then cooling for 30 min characteristic. The results showed that the heat-resistant material could not store enough heat for 20h, and the inner wall of refractory material in the upper part of the vacuum vessel was less than 800 ℃ after 30 minutes of natural cooling, which could not meet the needs of production. The preheated vacuum chamber for 96h and preheated to steady- After 30 min cooling, the temperature in each zone of the vacuum tank was higher than 800 ℃, which met the needs of production. The preheated 96 h and the simulation of the surface temperature of the vacuum tank after lifting for 30 min were in good agreement with the field measurements. Taking into account the economy, production should be used preheat 96 h program.