不同焙烧温度冷捣糊的室温蠕变性能  

Room temperture creep behaviour of ramming paste baked at different temperatures

作　　者：刘民章 Liu Min-zhang translated(Qinghai Qiaotou Aluminium Power Co.,Ltd.,Qinghai Xining 810100,China)

机构地区：[1]青海桥头铝电股份有限公司技术中心,青海西宁810100

出　　处：《炭素技术》2018年第4期67-72,共6页Carbon Techniques

摘　　要：为了模拟冷捣糊在铝电解槽中的热力学行为,需要提供实验数据来建立三维模型,确定建模规则并确定参数。然而,由于测量装置的局限性,很难在高温下获得径向应变。此外,要获得明显的径向应变幅度,试样需要足够大。因此,研究了室温下冷捣糊的蠕变性能,并通过温度与轴向应变的函数关系推断高温情况下的径向应变行为。测量了焙烧温度为250～1 000℃范围冷捣糊的室温机械性能。To simulate the thermo-mechanical behaviour of ramming paste in aluminium electrolysis cells, experimental data are required to feed 3 D constitutive models. Both axial and radial strain measurements are necessary to design constitutive laws and to identify the parameters. However, radial strains are difficult to obtain at high temperature due to limitations of measuring devices. Moreover,samples need to be sufficiently large to acquire significant radial strain amplitude. Hence, the creep behaviour of ramming paste was studied at room temperature so the radial behaviour could then be extrapolated for the high temperature case using the axial strain evolution as a function of the temperature. Mechanical properties of ramming paste, baked at temperatures ranging from 250 ℃ to 1000 ℃,were measured at room temperature. Uniaxial creep tests were performed at threedifferent stress levels for each baking temperature.

关 键 词：铝电解 冷捣糊 蠕变 3D机械性能表征 

分 类 号：TQ127.11[化学工程—无机化工]