侧顶复吹条件下AOD熔池内的传质特性  

Mass Transfer Characteristics in an AOD Bath under Conditions of Combined Side and Top Blowing

作　　者：左怀英[1] 魏季和[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《过程工程学报》2008年第S1期1-8,共8页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金和上海宝钢集团公司联合资助项目(编号:50374047)

摘　　要：在120t侧顶复吹AOD转炉1/4的水模型装置上,采用分析纯氯化钠粉剂,测定了AOD过程中液体内溶质(NaCl)的传质系数,考察了侧吹和顶吹气量、侧枪枪位及支数、粉剂(气泡)尺寸等的影响.结果表明,在本工作条件下,熔池液体内溶质的传质系数在7.31×10^(-5)～3.84×10^(-4)m/s范围内;对给定侧枪支数和侧吹气量的纯侧吹过程,传质系数随相邻两侧枪间夹角的增大非线性增大;侧吹主枪气体对熔池内传质有决定性作用,顶吹气流使传质速率减小;增大颗粒(气泡)尺寸使传质系数增大;对应于实际工艺所规定的顶吹气量,7枪、22.5°和6枪、27°以及5枪、22.5°的侧枪配置均能提供较大传质速率.得到了有关的无量纲关系式.On a water model unit of 1/4 linear scale for a 120 t combined side and top blowing AOD converter,using sodium chloride powder of analytical purity as the flux for blowing,the mass transfer coefficient of solute(NaCI)in the liquid was determined under the conditions of the AOD process.The influences of the gas flow rates of side and top blowing processes,the position and number of side tuyere,the powder flux particle(bubble)size and others were examined.The results indicated that,under the conditions of the...

关 键 词：不锈钢 AOD精炼 侧顶复吹过程 传质特性 物理模型 

分 类 号：TF729[冶金工程—钢铁冶金]