电弧炉用氧技术的多相流数值模拟研究  

Modeling Research of an Impinging Oxygen Jet in the Electric Arc Furnace

作　　者：李桂海[1] 何春来[1] 朱荣[1] 董凯[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《工业加热》2011年第1期23-27,共5页Industrial Heating

基　　金：国家支撑计划项目"流程工业多尺度模拟放大技术及其在石化行业的应用"中的子课题"过程放大多尺度模拟技术及系统开发"(2008AF33B 01)

摘　　要：对150 t电弧炉冶炼过程中单支氧枪供氧流量分别为500,1 450,1 800,2 000 m^3/h时氧气射流冲击熔池进行了三维三相流数值模拟。模拟研究表明,随着供氧流量的增加,熔池中钢液和渣液的流动速度、裸露钢液面面积及射流的冲击深度均增大。由数值模拟和水模得到的供氧流量与射流冲击深度的规律得到了很好的吻合。在数值模拟的基础上,计算了不同供氧流量下的射流冲击力;研究表明射流冲击力越大,熔池凹坑受到的静压力越大;并建立了脱碳速度与射流冲击指数之间的关系。A mathematical model has been developed to analyze the transient three-dimensional and three-phase flow in the 150 t EAF using single oxygen when the oxygen flow rate of 500, 1 450, 1 800, 2 000 m3/h. Multiphase Volume of Fluid （VOF） method is used to clarify the transient phenomena of oxygen impingement on the molten bath, and to simulate the behavior of molten steel and slag. The result ofnu- merical simulations shows that with the increasing ofoxygen flow rate, the velocity ofmolten bath increases, the penetration depth gets bigger and the surface area of uncovered steel on which the slag layer is pushed away by jets is enlarged. The results have been validated against water model experiments. More specially, the penetration depth predicted by numerical simulation has been found to agree well with that by water model. On the basis of numerical simulation, the impact force of jet under different oxygen flow rate is calculated, which shows with the in- creasing of impact force, the nominal static pressure of molten steel in cavity increases. And the relationship between decarburization rate and index of penetration is established.

关 键 词：电弧炉 氧气射流 三相流 数值模拟 

分 类 号：TF741[冶金工程—钢铁冶金]