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环冷机内球团矿热过程数学模型
引用本文:冯俊小, 梁凯丽, 张材, 徐景海, 张永明, 杨金宝. 环冷机内球团矿热过程数学模型[J]. 工程科学学报, 2010, 32(12): 1596-1600. DOI: 10.13374/j.issn1001-053x.2010.12.014
作者姓名:冯俊小  梁凯丽  张材  徐景海  张永明  杨金宝
作者单位:北京科技大学机械工程学院,北京,100083;首钢矿业公司,迁安,064404
基金项目:国家高技术研究发展计划(863计划)
摘    要:
根据能量守恒、流动和传热传质等原理及定律,建立了球团矿冷却和氧化过程的数学模型,采用三对角矩阵算法对模型进行了求解,基于VisualBasic6.0开发了仿真计算软件.依据现场实测数据对建立的数学模型进行了验证,计算值与实测值之间的最大相对误差为4.8%,说明模型正确可信.利用开发的计算软件对球团矿在环冷机内的热过程进行了仿真计算,得到了环冷机内球团料层的温度分布.仿真研究表明,冷却一段风速、料层厚度、球团粒度和环冷机机速是影响环冷机内部球团料层冷却过程的主要因素.在本文研究条件下,合理操作条件为:料层厚度550~800mm,球团粒度7~16mm,冷却一段风速1.2~2.5m·s-1,环冷机机速1.0~1.5m·min-1.

关 键 词:球团  冷却系统  热过程  数学模型  温度分布
收稿时间:2010-04-01

Mathematical model of the pellet thermal process in an annular cooler
FENG Jun-xiao, LIANG Kai-li, ZHANG Cai, XU Jing-hai, ZHANG Yong-ming, YANG Jin-bao. Mathematical model of the pellet thermal process in an annular cooler[J]. Chinese Journal of Engineering, 2010, 32(12): 1596-1600. DOI: 10.13374/j.issn1001-053x.2010.12.014
Authors:FENG Jun-xiao  LIANG Kai-li  ZHANG Cai  XU Jing-hai  ZHANG Yong-ming  YANG Jin-bao
Abstract:
Based on the principle or laws of energy conservation, fluid flow, and heat and mass transfer, a mathematical model of pellet cooling and oxidation was established and solved by a three-diagonal matrix algorithm.Its numerical simulation software was developed with Visual Basic 6.0.A field test was performed and the established model was verified by practical measured results.The maximum relative error between computational and measuring results is 4.8%, indicating that the developed model is correct and reliable.A numerical simulation of the pellet thermal process in an annular cooler was conducted with the developed computational software and the temperature distribution of the pellet bed was gained.The simulation results show that the main influencing factors on the cooling process of the pellet bed in an annular cooler are air velocity in the first cooling zone, pellet bed thickness, pellet size and the annular cooler’s velocity.Under the research condition, the reasonable operation parameters are the following:the range of pellet bed thickness is from 550 to 800 mm, the range of pellet size is from 7 to 16 mm, the range of air velocity in the first cooling zone is from 1.2 to 2.5 m·s-1, and the range of the annular cooler’s velocity is from 1.0 to 1.5 m·min-1.
Keywords:pelletizing  cooling systems  thermal process  mathematical models  temperature distribution
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