Research on the Operation of the Sinter Bed with the Process Gas Circulating System

Recently the pollution of the air becomes the most severe problem in the world. In steelmaking there are many plants exhausting the huge amount of flue gas. Therefore it is the most important problem for us to improbe the enviromental circumstance. Especially the sintering process of iron ore has the largest volume of flue gas in the steelmaking works. Scone of the important task is how to decrease exhaust gas volume of this process. This research is based on the simulation of the many kind of phenomena that happen simultaneously in the packed-bed reactor. Basic relation are represented by the mathematical model which is constructed from twelve partial differential equation including coke combustion reactioawater drying process and vapor condensation phenomenon in the bed. The calculating results of mathematical model were compared with the measured data/which derived from the experiment of the sinter pan instrument. Then it could be confirmed that the simulation results were similar to the experimental results. So, we could use this mathematical model to estimate the influence of flue gas circulation system. Through this simulation analysis jt can be concluded that the flue gas volume can be decreased approximately twenty percent. The main points of decreasing flue gas is based on the following points. At first, hot gas income to the packed bed. The second is the humidity in the circulating gas can be used for heat transfer. The third is optimization of reactant between heat carrier. This way of flue gas circulation system is great help to save energy and to improbe the pollution of the air, so it will be widely applied for the same type plants like this in future.