烧结过程温度场数值模拟及烧结终点参数影响  

Numerical simulation of temperature field in sintering process and influence of sintering end point parameters

作　　者：杨双平[1] 张益玮 刘起航[1] 王苗[1] 池延斌[1] 董洁[1] YANG Shuangping;ZHANG Yiwei;LIU Qihang;WANG Miao;CHI Yanbin;DONG Jie(School of Metallurgical Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,Shaanxi,China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《钢铁研究学报》2024年第9期1174-1182,共9页Journal of Iron and Steel Research

基　　金：陕西省自然科学联合基金资助项目(2022JQ-302)。

摘　　要：烧结是整个钢铁工业生产中一个不可缺少的环节,烧结过程中参数的变化会直接影响烧结矿的质量和产量。以某钢厂150 m^(2)烧结机为研究对象,用Fluent仿真模拟软件对烧结工艺参数进行模拟,通过建立合适的物理数学模型,依据现场实际数据来模拟料层内温度场变化的规律,并采用单因素分析法,研究配碳量、孔隙率、料层厚度及抽风负压等参数对达到烧结终点所需时间的影响,确定了最佳工艺参数。研究结果表明:增加配碳量,达到烧结终点所需时间变短,在配碳量(质量分数)为4.23%时烧结终点位置最佳;增加料层孔隙率,达到烧结终点所需时间变短,当孔隙率为0.49左右时,烧结终点位置最佳;增加料层厚度,达到烧结终点所需时间延长,当料层厚度达到734.13 mm时,垂直烧结速度达到最大为0.321 mm/s;提高抽风负压,达到烧结终点所需时间会缩短,当抽风负压达到15 kPa时,垂直烧结速度最佳。在优化后的工艺参数下烧结矿的质量和产量得到了提高。Sintering is an indispensable link in the whole iron and steel industry production,the change of parameters in the sintering process will directly affect the quality and output of sinter.Taking the 150m^(2) sintering machine of a steel plant as the research object,the simulation software Fluent was used to simulate the sintering process parameters.By establishing a suitable physical and mathematical model,and based on on-site actual data,the temperature field changes in the material layer were simulated.Single factor analysis was used to study the effects of carbon content,porosity,material layer thickness,and suction negative pressure on time required to reach the sintering end point,and the optimal process parameters were determined.The research results show that increasing the carbon content shortens time required to reach the sintering end point,and the optimal sintering end point position is achieved when the carbon content is 4.23 mass%.When the porosity of the layer increases,time required to reach the sintering end point becomes shorter,and the sintering end point position is the best when the porosity is about 0.49.When the thickness of the material layer increased,time required to reach the sintering end point is extended.When the thickness of the material layer reaches 734.13mm,the maximum vertical sintering speed reaches 0.321mm/s.By increasing the suction negative pressure,time required to reach the sintering end point will be shortened.When the suction negative pressure reaches 15kPa,the vertical sintering speed is optimal.Under the optimized process parameters,the quality and output of sintered ore are improved.

关 键 词：烧结 Fluent数值模拟 温度场模拟 传热传质 烧结终点参数 

分 类 号：TF046[冶金工程—冶金物理化学]