运用非线性盈亏分析法建立数学模型,对一铁厂9BF正常生产时期生铁产量与成本的关系进行了量化分析,对9号高炉盈利最大化等相关问题进行了研究。9号高炉产量波动范围目前尚处于盈亏平衡区内。因此,在目前生铁价格条件下,9号高炉继续增产可增加盈利。 This paper establishes a mathematical model by using nonlinear profit and loss analysis method, and makes a quantitative analysis of the relationship between pig iron production and cost in the normal production period of 9BF in a iron works, and studies related issues such as maximizing the profit of No.9 blast furnace. No. 9 blast furnace output fluctuation range is still in breakeven area. Therefore, at the current price of pig iron, No. 9 blast furnace to increase production can increase profits.