REVIEW AND APPLICATIONS OF THERMAL CONDUCTIVITY MODELS TO ALUMINUM CELL SIDEWALL REFRACTORIES

摘要：

Silicon nitride bonded silicon carbide (Si3N4-SiC) refractories are commonly used as the sidewall of aluminum electrolysis cells. They have to withstand an extremely corrosive molten electrolyte bath for long periods. The sidewall is normally protected with a layer of solidified electrolyte (called frozen ledge), which is sensitive to the thermal conductivity of the sidewall. In this work, through review of the literature on modeling methods for predicting the effective thermal conductivity of dense composites and porous materials, some selected methods were applied to calculate the effective thermal conductivity of Si3N4-SiC refractories. The model predictions were compared with the thermal conductivity of a commercial Si3N4-SiC refractory measured by using laser flash technique. The present study showed that, due to multi-phase nature and complex microstructure of Si3N4-SiC refractories, most of the selected modeling methods individually do not give satisfactory predictions in one step. Recursive applications of one method or combinations of different methods are capable of giving satisfactory predictions.

关键词： Thermal conductivity modeling composite material porous material refractory

作者: YUHUA PAN STEVEN WRIGHT SHOUYI SUN

作者单位: CSIRO Minerals, Box 312, Clayton South, Melbourne, VIC 3169, Australia

会议类型: 国际会议

会议名称: 第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)

会议地点: 哈尔滨

会议语种:英文

页码: 790-795

在线出版日期: 2008-09-03（万方平台首次上网日期，不代表论文的发表时间）