钢水包耐火层热应力分析

Thermal Stress of Refractory Layer of 150 Ton Ladle

综合考虑钢水包温度载荷和多接触面弹性接触载荷,建立了复杂空间结构钢水包的三维多接触面热弹性接触有限元分析模型,对易耗损的耐火层进行了热应力分析。计算结果表明,耐火层产生了较高的热应力,最大为89MPa。耐火层的包身与包底内壁交界是强度危险区,耳轴与耳轴箱交界处热应力较高,温度是外壁最高处,同样是强度危险区。

A three-dimensional finite element model with multi-contact surfaces of a 150 ton refining ladle of complicated spatial structure is built by considering thermal loading and contact deformation, by which the thermal stress of the refractory layer is calculated. The numerical results show that there is high thermal stress taken place in the refractory layer. The maximum thermal stress is 89MPa. The junction zone of interior wall and bottom is illustrated to be a high stress zone. The refractory layer behind the trunnion box is under tensile stress state. It has high thermal stress and maximum temperature in outer wall. Hence, it is another dangerous section of the refractory layer.