| Application of Multi-stage Zone Reaction Model for Agglomerates to Blast Furnace Analysis Masaaki Naito1; 1NIPPON STEEL TECHNOLOGY CO., LTD., Futtsu, Japan; PAPER: 429/Iron/Keynote (Oral) SCHEDULED: 11:45/Fri. 25 Oct. 2019/Ambrosia B (77/RF) ABSTRACT: It is important to evaluate the reduction behavior of agglomerates as well as permeability for Blast Furnace analysis. Generally, rate-parameters of an agglomerate is used for several BF analysis. But, sinter has a different porosity in a different particle size. In radius direction of a blast furnace top, sinter particle size is different by burden distribution control. And also, sinter particle size changes by reduction degradation in a low temperature region of BF. In the high temperature region over 1100○C, porosity of sinter decreases by melt formation inside of sinter. It is needed to consider the change of particle size and porosity by above phenomena in the BF analysis <br />Here, Multi-Stage Zone Reaction model (MSZR) is used for analyzing the reduction of agglomerates. How to evaluate the rate-parameters is considered and the influence of agglomerate quality is analyzed. References: M.Naito,T.Murayama and T.Usui: Tetsu-to Hagane,「Kinetic Analysis on Gaseous Reduction of Agglomerates,Part3, Application of Gaseous Reduction Models for Agglomerates to Blast Furnace Analysis」,80(1994)8, p581 |
