摘要
结合当前钨钼烧结炉用氧化锆顶盖砖的使用情况,利用ANSYS软件,模拟分析了氧化锆顶盖砖异常损坏的原因,并通过对不同厚度、不同体积密度顶盖砖使用过程中应力场的模拟研究,对顶盖砖结构优化进行了探索。结果表明:顶盖砖在使用过程中的最大拉应力为27MPa,远远超过了材料的结合强度,从而造成“断裂”和“龟裂”,导致寿命降低;顶盖砖的体积密度和厚度对其使用过程中的热应力有着显著的影响,当氧化锆顶盖砖的体积密度在3.0~4.6g/cm^(3)时,降低体积密度可以减小顶盖砖使用过程中的热应力,综合体积密度对氧化锆空心球砖其他性能的影响,将当前用顶盖砖的体积密度提高至3.3g/cm^(3),厚度减薄至50mm时,顶盖砖使用过程中的最大热应力只有10.27MPa,而顶盖砖的抗折强度达到13.6MPa,从而有效改善其使用寿命。
The causes of abnormal damage to the zirconia roof brick utilized in tungsten and molybdenum sintering furnaces are simulated and analyzed in this study using ANSYS software.Furthermore,the structural optimization of the roof brick is explored by simulating the stress field during its operational usage with varying thicknesses and volume densities.The results indicate that the maximum tensile stress experienced by the top brick exceeds 27 MPa,significantly surpassing the materials bonding strength,leading to fractures and cracks that reduce its lifespan.Moreover,both bulk density and thickness have a substantial impact on thermal stress during operation.By reducing the bulk density within a range of 3.0~4.6 g/cm^(3) for the zirconia top brick,it is possible to effectively mitigate thermal stress during its operation.Additionally,increasing the current roof bricks bulk density to 3.3 g/cm^(3) while reducing its thickness to 50 mm results in a maximum thermal stress of only 10.27 MPa during usage,which aligns well with a bending strength of 13.6 MPa and significantly enhances its service life.
作者
张涛
冯志源
王晗
谭清华
范沐旭
刘鹏程
ZHANG Tao;FENG Zhiyuan;WANG Han;TAN Qinghua;FAN Muxu;LIU Pengcheng(Sinosteel Luoyang Institute of Refractories Research Co.Ltd.,Luoyang 471039,China)
出处
《工业加热》
CAS
2024年第8期63-66,71,共5页
Industrial Heating
关键词
钨钼烧结炉
氧化锆空心球砖
ANSYS模拟
tungsten molybdenum sintering furnaces
bubble zirconia brick
ANSYS software
