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运用系统动力学原理,采用因果关系和存量流量分析方法,在相对宏观的层面构建了钢铁生产流程炼铁工序的铁素流动态模型。仿真结果准确,验证了所建炼铁工序系统动力学模型的正确性并分析了不同返回情况下高炉铁素、铁水铁素流和损失铁素流的动态特性。计算结果表明:从物料投入高炉到铁水稳定输出时段,铁水铁素流随时间的增加而不断增大,然后逐渐趋于稳定,且铁水铁素流在炼铁初始时段增加速度最快;高炉铁素和损失铁素流均与本单元铁素流返回率呈正相关,且不随上游铁素流返回率的变化而改变;铁水铁素流与上游铁素流返回率、本单元铁素流返回率均呈负相关;上游铁素流返回率的增大会使铁水铁素流减小至新的稳定输出状态;本单元铁素流返回率的增大会使铁水铁素流先减小,然后逐渐增大至新的稳定输出状态。
By using the principle of system dynamics, a dynamic model of ferrite flow was established at a relatively macroscopic level using the causal relationship and inventory flow analysis method. The simulation results are correct. The correctness of the system kinetic model of the ironmaking process is validated and the dynamic characteristics of the ferrite, molten iron and the lost ferrite in the blast furnace are analyzed under different conditions. The results show that the ferrite flow increases continuously with the increase of time from the input of blast furnace to the stable output of hot metal, then gradually stabilizes, and the hot metal ferrite flow increases most rapidly in the initial period of blast furnace. Both the elemental and the loss of ferrite flow are positively correlated with the return rate of ferrite flow in the unit and do not change with the return rate of the upstream ferrite flow. The return rates of ferrihydrite flow and upstream ferrite flow, All of them are negatively correlated with each other. The increase of the return rate of the ferrite flow in the upstream will reduce the ferrite flow to a new steady state. The increase of the ferrite flow rate in this unit will decrease the ferrite flow and then increase gradually Large new stable output state.