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基于系统动力学理论,在因果分析和存量流量分析的基础上,构建了转炉炼钢工序的铁素流动态模型,并通过仿真测试验证了模型的正确性。分析了在不同返回情况下,本单元铁素流返回率和返回上游的铁素流返回率随时间改变时,钢坯铁素流、损失铁素流和转炉铁素存量的动态特性。结果表明:转炉铁素存量和损失铁素流不受上游返回的影响,只随本单元返回的增大而逐渐增大至新的稳定输出状态。上游返回的增大不影响炼钢工序运行的紧凑性,但会导致稳定输出量的减小;本单元返回的增大不影响稳定输出量,但会导致运行紧凑性变差;上游和本单元均有返回时,对稳定输出量和运行紧凑性都有影响。
Based on the theory of system dynamics, a dynamic model of ferrite flow in BOF steelmaking process was constructed on the basis of causal analysis and inventory flow analysis, and the correctness of the model was verified through simulation tests. The dynamic characteristics of ferrite flow, loss of ferrite flow and converter ferrite stock in billet with different return conditions were analyzed. The results show that the return flow rate of ferrite flow and the return flow rate of ferrite flow upstream of this unit change with time. The results show that the ferrite stock in the converter and the loss of the ferrite flow are not affected by the upstream return and only increase with the increase of the unit back to the new stable output. The increase of the upstream return does not affect the compactness of the operation of the steelmaking process, but it will lead to a decrease of the stable output. The increase of the unit return does not affect the stable output, but will lead to the deterioration of the operation compactness. Upstream and the unit When returning, it has an effect on stable output and operational compactness.