MHCC耦合模型下的180 t转炉高废钢比冶炼工艺  

Smelting process of 180 t converter with high scrap ratio under MHCC coupling model

作　　者：吴博 薛正良[1,2] 宋生强[1,2] Wu Bo;Xue Zhengliang;Song Shengqiang(Wuhan University of Science and Technology,The State Key Laboratory of Refractories and Metallugy,Wuhan 430081,China;Wuhan University of Science and TechnologyKey Laboratory for Ferrous Metallurgy and Resources Uilization of Ministry of Education,Wuhan 430081,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,武汉430081 [2]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,武汉430081

出　　处：《材料与冶金学报》2024年第6期598-606,共9页Journal of Materials and Metallurgy

基　　金：湖北省自然科学基金项目(2022CFB628)。

摘　　要：根据半经验公式,将物料平衡、热平衡、碳排放和成本效益进行有机结合,开发了一种广义的质量(mass)-热量(heat)-碳排放(C)-成本(cost)耦合模型(简称MHCC耦合模型).利用MHCC耦合模型,结合某钢厂180 t转炉的原料成分、钢铁料结构、出钢温度和钢液成分等信息,建立了质能平衡方程.应用建立的转炉吹炼过程输入、输出关系,探究了转炉高废钢比冶炼对熔剂消耗、热量平衡、碳排放以及成本效益4个方面的影响.结果表明:随着废钢比r(即废钢与铁水之比)的增加,熔池中硅和碳的质量分数下降,转炉达到目标终点磷含量(质量分数)消耗的熔剂量和氧气量相应减少;当r从0.21增加到0.40时,熔池中硅的质量分数从0.6%降低到0.4%,碳的质量分数从3.6%降低到3.1%;当转炉终点钢水中磷的质量分数为0.01%时,熔剂消耗量从50.18 kg/t降低到39.92 kg/t,氧气消耗量从42.87 m^(3)/t降低到40.66 m^(3)/t(标准状态下,下同);转炉过程中碳的排放量和吨钢生产成本均下降,当r从0.16增加到0.40时,气化的碳的排放量从44.9 kg/t降低至38 kg/t,降低了约15.37%,同时炼钢成本降低了100.71元/t.Based on semi-empirical equations,a generalized mass(mass)-heat(heat)-carbon(C)-cost(cost)coupling model(MHCC for short)is developed,which combines the material balance,heat balance,carbon emission,and cost-effectiveness.Using the MHCC coupling model,the mass-energy balance equation is established by combining the raw material composition,steel material structure,tapping temperature,and molten steel composition of a 180 t converter in a steel plant.The established input-output relationship of the converter blowing process is applied to investigate the influences on the four aspects of melt consumption,heat balance,carbon emission,and cost-effectiveness in the production of a converter with a large scrap ratio.The results show that with the increase of scrap ratio(i.e.the ratio of scrap steel to molten iron,hereinafter referred to as r),the mass fraction of silicon and carbon in the melt pool decreases,and the flux and oxygen consumed by the converter to reach the target end point P decreases accordingly.When r increases from 0.21 to 0.40,the mass fraction of Si in the molten pool decreases from 0.6%to 0.4%,and the mass fraction of C decreases from 3.6%to 3.1%.When the target P mass fraction of the endpoint molten steel is 0.01%,the amount of flux consumed decreases from 50.18 kg/t to 39.92 kg/t,the amount of oxygen consumed decreases from 42.87 m^(3)/t to 40.66 m^(3)/t(under standard condition,the same below).The carbon emission in the converter process and the production cost per ton of steel decreased.When r increases from 0.16 to 0.40,the carbon of gasification decreases from 44.9 kg/t to 38 kg/t,and the carbon emission decreases by 15.37%.At the same time,the cost of steelmaking decreases by 100.71 CNY/t.

关 键 词：转炉 MHCC耦合模型 高废钢比 碳排放 

分 类 号：TF713[冶金工程—钢铁冶金] X756[环境科学与工程—环境工程]