石灰石转炉炼钢的静态模型

研究了石灰石代替石灰炼钢的新方法.从理论上分析了石灰石代替石灰转炉炼钢的可行性，结合热力学分析，建立了CO2与［C］，［Si］，［Mn］和［Fe］反应的基于吉布斯自由能的分配模型.根据物料平衡和热平衡计算，求解线性方程组，得到不同石灰石替代比例条件下的各种物料消耗，确定了石灰石最大替代比，并重点研究了转炉煤气成分和产量的变化，最后考察了石灰石炼钢的成本.在本研究条件下的结果表明，可以在转炉中使用石灰石炼钢，石灰石最大替代比为71%；随着石灰石替代石灰比例的增加，废钢消耗降低，CO2体积分数降低，石灰石炼钢的成本逐步下降，吨钢铁水消耗提高，CO体积分数增加，转炉炉气质量提高.

Static Model for Converter Steelmaking with Limestone

Converter steelmaking with limestone instead of lime was studied. The theoretical feasibility of using limestone instead of lime was analyzed for converter steelmaking. A partition model for carbon dioxide reaction with［C］，［Si］，［Mn］and［Fe］was established on the basis of thermodynamic analysis. According to the mass and heat balance calculations， the materials consumptions under different limestone substitution proportions were obtained， and the maximum limestone substituting proportion was determined. The changes of converter gas composition and production and the cost of steelmaking were studied. The results showed that limestone can be used in converter steelmaking and the maximum substitution proportion is about 71%under the involved conditions. With the increase of limestone substitution， the scrap consumption， volume fraction of CO2 in furnace gas and the steelmaking cost decrease， while the hot metal consumption， volume fraction of CO in furnace gas and the quality of furnace gas increase.