| 高温熔融高炉渣颗粒相变冷却特性分析 |
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| 引用本文： | 刘小英,朱恂,廖强,王宏. 高温熔融高炉渣颗粒相变冷却特性分析[J]. 化工学报, 2014, 65(Z1): 285-291. DOI: 10.3969/j.issn.0438-1157.2014.z1.046 |
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| 作者姓名： | 刘小英 朱恂 廖强 王宏 |
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| 作者单位： | 1. 重庆大学低品位能源利用及系统教育部重点实验室, 重庆 400030;2. 重庆大学工程热物理研究所, 重庆 400030 |
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| 基金项目： | 国家重点基础研究发展计划项目（2012CB720403）。 |
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| 摘 要： | 采用温度法模型对高温熔融高炉渣颗粒的相变冷却特性进行了分析，考虑颗粒固液相热导率随温度的变化及颗粒与环境的辐射换热，获得了高温熔渣颗粒内的温度分布以及相界面位置随时间的推移过程。讨论了变热导率、换热条件、颗粒尺寸，冷却流体速度和温度对相变冷却过程的影响，结果表明：热导率的变化使得颗粒冷却凝固时间延长，高温辐射换热极大加快了冷却速率；颗粒直径增加，相界面移动速度降低，凝固时间增加；冷却流体速度增加，温度降低，相界面移动速度增加，凝固时间缩短。
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| 关 键 词： | 粒化高炉渣 相变换热 温度场 相界面 数值模拟 模型 |
| 收稿时间： | 2014-02-11 |
| 修稿时间： | 2014-02-21 |
Theoretic analysis on transient solidification behaviors of a molten blast furnace slag particle |
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| LIU Xiaoying,ZHU Xun,LIAO Qiang,WANG Hong. Theoretic analysis on transient solidification behaviors of a molten blast furnace slag particle[J]. Journal of Chemical Industry and Engineering(China), 2014, 65(Z1): 285-291. DOI: 10.3969/j.issn.0438-1157.2014.z1.046 |
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| Authors: | LIU Xiaoying ZHU Xun LIAO Qiang WANG Hong |
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| Affiliation: | 1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400030, China;2. Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China |
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| Abstract: | A theoretic analysis is performed with temperature model on transient air cooling and solidification behaviors of a spherical molten slag particle. With considering the variation of thermal conductivity with temperature and the radiation between slag and environment, the temperature distribution and the transient moving of phase-change interface inside the particle are obtained by applying the finite difference method. The effects of variable thermal conductivity, heat transfer boundary condition, slag particle size, air flow rate and initial temperature of the slag particle are discussed. The simulation results indicate that the variable thermal conductivity of the slag extends the solidification process, while the radiation significantly improves the cooling speed. Meanwhile, the solidification process is speeded up with increasing air flow rate and decreasing particle size. The cooling and solidification process is prolonged for the slag particle with higher initial temperature. |
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| Keywords: | granulate blast furnace slag phase-change heat transfer temperature field phase interface numerical simulation model |
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