150t精炼钢水包温度场与热应力分析

Analysis of Temperature Field and Thermal Stress in 150t Refining Ladle

某炼钢厂为了提高产能,需要对150 t精炼钢水包进行减重扩容。针对改造方案,综合考虑钢水包的多接触面弹性接触载荷和温度载荷,建立钢水包三维空间结构模型和有限元计算模型,计算了钢水包整体温度场,并对钢水包进行了热应力分析。结果表明:钢水包包壁腹部温度最高,为341℃,与现场测试结果基本吻合;包壁加强圈与耳轴箱交界处热应力最高,为227 MPa,耳轴箱下侧4个角与包壁交界处应力最高达221 MPa;此外,包底与其底部支撑处局部区域应力也较高,为强度危险区。根据已造钢包的试用结果,在极限载荷下,各关键工序热试成功,顺利投入使用。

In order to enhance the capability of a steel mill, it is necessary to reduce the weight and expand the capacity of the 150 t ladle. In view of the modification scheme, considering the elastic contact loads and temperature loads of multiple contact surfaces of the ladle, the three-dimensional structure model and the finite element simulation model of the ladle were established, and calculation and analysis of the temperature field and thermal stress of the ladle were carried out. The results showed that the temperature in the abdomen of ladle wall was the highest value of 341 ℃, which was basically consistent with the temperature measurement results on site;the thermal stress at the junction of the reinforcing ring and the trunnion box was the highest value of 227 MPa, and the thermal stress at the junction of the four lower corners of the trunnion box and the ladle wall was up to 221 MPa. In addition, the local stress at the bottom of the package and its bottom support was also higher, which was a strength danger zone. According to the test results of the manufactured ladle, under the ultimate load of molten steel, the key processes were successfully tested and put into use.