Gas Flow Distribution in Pelletizing Shaft Furnace

作     者：CAI Jiu-ju DONG Hui WANG Guo-sheng YANG Jun 

作者机构：SEPA Key Laboratory on Eco-Industry Northeastern University Shenyang 110004 Liaoning China Department ofChemical Engineering shenyang Institute of Chemical Technology Shenyang 110141 Liaoning China 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2006年第13卷第6期

页      面：16-20页

核心收录：

学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：ItemSponsored by National Natural Science Foundation of China (50334020) National Key Fundamental Research andDevelopment Project of China (2000026300) 

主　　题：pellet shaft furnace fixed bed packed bed gas flow 

摘      要：Through thermal test, cold state experiment, analysis and simulation of thermal process, the gas flow distribution in pelletizing shaft furnace （PSF） was discussed. The results show that there are five flowing trends among them, the downward roasting gas and the upward cooling gas are the most unsteady, which influence flow distribution greatly. Among the operating parameters, the ratio of inflow is a key factor affecting the flow distribution. The roasting and cooling gases will entirely flow into the roasting zone and internal vertical air channels （IVAC）, respectively, if the ratio of inflow is critical. From such a critical operating condition increasing roasting gas flow or decreasing cooling gas flow, the roasting gas starts flowing downwards so as to enter the inside of IVAC the greater the ratio of inflow, the larger the downward flowrate. Among constructional parameters, the width of roasting zone b1, width of IVAC b2 and width of cooling zone b3, and the height of roasting zone h1, height of soaking zone h2 and height of cooling zone hs are the main factors affecting flow distribution. In case the ratio of b2/b3, or h3/h2, or h1/h2 is increased, the upward cooling gas tends to decrease while the downward roasting gas tends to increase with a gradual decrease in the ratio of inflow.