烧结冷却过程换热规律数值模拟研究  

Research on numerical simulation of sintering cooling process

作　　者：李雨[1] 裴永红[2] 王浩 王双[1] 王诗歌 李晓丽 陈光[1] Li Yu;Pei Yonghong;Wang Hao;Wang Shuang;Wang Shige;Li Xiaoli;Chen Guang(Anhui University of Technology;Maanshan Iron and Steel Co.,Ltd.;China 17 Metallurgical Group Co.,Ltd.)

机构地区：[1]安徽工业大学 [2]马鞍山钢铁股份有限公司 [3]中国十七冶集团有限公司

出　　处：《冶金能源》2023年第2期27-32,共6页Energy For Metallurgical Industry

基　　金：国家重点研发计划资助项目(2020YFB1711101)。

摘　　要：以有效冷却面积432 m^(2)带冷机为背景,基于局部非热力学平衡理论,针对烧结冷却过程,建立了三维非稳态多孔介质传热模型,分析了孔隙率、料层厚度、气料比、冷却机运行速度等参数,对出口烟气温度及烟气回收总热量的影响。结果表明:孔隙率越大,烧结矿温度下降越快;烧结矿料层厚度升高使出口烟气温度升高;气料比增大,烟气回收总热量先增大后减小,料层厚度为1300 mm,气料比为904.83 m 3/t时,冷却烟气回收总热量最高,为36.24 GJ/h;料层厚度为1300 mm,运行速度为1.88 m/min时,吨矿回收的烟气热量最大,为0.24 GJ/t。Taking the effective cooling area 432 m^(2) belt cooler as the research object,based on the local non-thermodynamic equilibrium theory,a three-dimensional non-steady-state porous medium heat transfer model is established for the sintering cooling process,the effects of parameters such as porosity,material layer thickness,gas-material ratio,and cooling machine running speed on flue gas temperature and total heat recovery were analyzed.Taking the outlet flue gas temperature and the total heat recovered from the flue gas as indicators,the operating parameters of the cooling machine were optimized.The results show that:the greater the porosity,the faster the temperature of sintered ore decreases;The increase of the thickness of the sintered ore layer increases the temperature of the flue gas at the outlet;The hotal heat recovered by flue gas increases first and then decreases with the increase of gas-material ratio,when the thickness of the material layer is 1300 mm and the gas-material ratio is 904.83 m 3/t,the total heat recovered from the cooling flue gas is the highest,which is 36.24 GJ/h;When the thickness of the material layer is 1300 mm and the running speed is 1.88 m/min,the flue gas heat recovered from ton of ore is the largest,which is 0.24 GJ/t.

关 键 词：孔隙率 气料比 运行速度 余热回收 

分 类 号：TF046.4[冶金工程—冶金物理化学]