Simulation of the Blast Furnace Process by a Mathematical Model
1992 年 32 巻 4 号 p. 470-480
詳細
1992 年 32 巻 4 号 p. 470-480
A one-dimensional static model for simulation of the blast furnace process has been developed. This simulation model is a part of the KTH Blast Furnace Process Model. The internal state of the furnace is described by the calculated distribution of fourteen process variables along the furnace axis which include temperature of the gas and condensed phases, composition, volumetric flowrate, density and pressure of the gas phase, degree of iron ore reduction, limestone decomposition and coke solution loss.
The behaviour of these process variables in the blast furnace is described by a set of ordinary differential equations together with three algebraic equations. In order to solve these fundamental equations and facilitate the treatment of operational data from blast furnace plants, the following submodels have been built up: 1) submodel for data base creation, 2) mass balance submodel for the whole furnace, 3) heat balance submodel for the whole furnace and 4) submodel for determination of the reaction rates.
This simulation model has been used for the simulation of two Nordic blast furnaces. The calculated profiles of gas temperature and iron ore reduction degree show similar aspects to those measured by shaft sensors in working blast furnaces. The model is useful for obtaining a deeper understanding of the blast furnace process.
