以与炉腹煤气量指数相关联的高炉利用系数为优化目标,建立了包括物质和能量的平衡约束、工艺约束、操作条件约束、其他变量上下限约束共50个线性和非线性约束条件,原燃料参数、工艺参数、生铁质量参数共16个优化变量的高炉性能优化模型。利用序列二次规划算法,得出优化结果。经与实际生产数据比较,验证了模型的正确性。利用该优化模型和算法,分析了高炉炉腹煤气量指数、煤比、铁的直接还原度、鼓风温度、鼓风湿度、鼓风富氧率对高炉利用系数的影响。
An optimization model for blast furnace iron-making process was developed by taking the utilization coeffi-cient as obj ective function.The utilization coefficient was related to bosh gas index.There were fifty linear and non-linear constraints,including conservation of matter and energy,constraints of process,constraints of operation con-dition,and constraints of other design variables.There were sixteen optimization variables,including parameters of raw materials and fuels,process parameters,and parameters of pig iron quality.The optimized results were ob-tained by using SQP (sequential quadratic programming)method,and the model was verified by comparing the opti-mized results with the real data obtained from production.Using the optimization model and SQP method,the influ-ences of bosh gas index,coal ratio,degree of direct reduction,blast temperature,blast humidity,and oxygen en-richment on utilization coefficient were analyzed.
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