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本文用有限汉克尔变换计算了炉底衬料的导热性及其厚度、冷却情况以及缸温等对炉底温度场的影响。计算的结果均用曲线来表明。这些结果指出:在多层结构的炉底中,最内层衬料的导热性愈小,而愈靠外层的导热性愈人,则炉底的温度梯度愈陡,热损失也愈小;冷却情况的好坏及缸温的高低对炉底温度场的好坏均有很大的影响。所得结果对炉缸、炉底的合理设计具有一定的指导作用。文内指出应该进一步研究炉底1150℃的位置与炉缸内外径及各层衬料厚度的关系;死铁层的深度对炉底温度场,尤其是1150℃的位置以及炉底底部中心处的温度等的影响也应进一步研究。作者认为:当用导热性较大的衬料(如碳砖)作最内层衬料时,其厚度很可能有一临界值。所谓“临界厚度”,意即当小于此厚度时,则遵守“最内层衬料的导热性愈小,炉底的温度则愈低”的原则;超过此厚度后,则反之。在多层结构(如双层结构)的炉底中,下部的导热性较大的衬料层具有“过渡的”冷却作用,而且有一个有效厚度,此厚度很可能是下层衬料与上层衬料导热性之比的递减函数。
In this paper, the influence of thermal conductivity, thickness, cooling and cylinder temperature on the temperature field of the furnace bottom is calculated by finite Hankel transformation. Calculated results are shown by the curve. These results indicate that the smaller the thermal conductivity of the innermost liner in the multi-layered furnace bottom and the more heat conductive the outer layer, the steeper the furnace floor temperature gradient and the smaller the heat loss. The quality of the cooling and the level of the cylinder temperature on the bottom of the temperature field have a great impact on the quality. The results obtained on the hearth, the rational design of the bottom has a guiding role. It is pointed out in the article that further study should be made on the relationship between the 1150 ° C bottom and the inside and outside diameter of the hearth as well as the lining thickness of each layer. The depth of the dead iron layer has an effect on the temperature field of the hearth, especially at 1150 ° C, The effects of temperature and so on should be further studied. The authors argue that when using the more thermally conductive gusset (such as carbon brick) as the innermost liner, the thickness is likely to have a critical value. The so-called “critical thickness”, meaning that when less than this thickness, then comply with “the innermost lining of the smaller thermal conductivity, the bottom of the furnace temperature is lower” principle; beyond this thickness, then the other hand. In the bottom of a multi-layer structure (such as a double-layer structure), the lower thermal conductivity of the liner layer has a “transitional” cooling effect and an effective thickness, which is likely to be the lower liner and the upper liner The thermal conductivity ratio of the decreasing function.