Prediction of granulated slag properties produced from spinning disk atomizer by mathematical model
Prediction of granulated slag properties produced from spinning disk atomizer by mathematical model
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DOI：
10.2320/matertrans.46.1324
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发表时间：
2005-06
影响因子：
1.2
通讯作者：
H. Purwanto;T. Mizuochi;T. Akiyama
中科院分区：
文献类型：
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作者：
H. Purwanto;T. Mizuochi;T. Akiyama
建立了旋转圆盘雾化器（SDA）高温熔融渣制取玻璃微珠的数学模型。该模型由三部分组成：1）旋转盘上熔渣的流动模型; 2）熔渣韧带形成的物理模型; 3）从韧带中分散出来的渣滴的传热模型。首先，一个2-D的流体流动模型开发，以评估在磁盘的边缘的渣膜厚度，并使用标量方程法（SEM）计算。接着，使用物理模型评估形成的韧带的数量和直径。最后，采用传热模型计算了液滴内的淬火速率和温度分布。所开发的模型进行了实验验证，通过比较计算值和观测值，在良好的协议。最重要的是，该模型还估计了炉渣玻璃化所需的淬火速率。
A mathematical model of a spinning disk atomizer (SDA) was developed to produce glass beads from high-temperature molten slag. The model comprises three parts: 1) fluid flow model of molten slag on the spinning disk, 2) physical model of ligament formation of slag, and 3) heat transfer model of slag drops dispersed from the ligament. First, a 2-D fluid flow model was developed to evaluate the film thickness of slag at the edge of the disk and was calculated using the scalar equation method (SEM). Next, the number and diameter of the ligaments formed were evaluated using the physical model. Finally, the heat transfer model was employed to evaluate the quenching rate and temperature distribution within the drop. The model developed was experimentally validated by comparing the calculated and observed values that were in good agreement. Most significantly, the model also estimated the quenching rate required for slag vitrification.