【作者】 王楠； 余珊； 黄翠环； 邹宗树；

【Author】 WANG Nan,YU Shan,SHAO Lei,HUANG Cui-huan,ZOU Zong-shu (School of Materials & Metallurgy,Northeastern University,Shenyang,Liaoning 110004,China)

【机构】 东北大学材料与冶金学院；

【摘要】 以铁浴熔融还原工艺的铁浴反应器为研究对象,基于FLUENT软件,对反应器内流场及温度场进行了数值模拟,考察了侧吹和顶吹操作条件对铁浴熔池均混时间、铁浴上部空间气相组成及温度分布以及煤气二次燃烧率的影响.计算结果表明,铁浴熔池均混时间随侧吹喷枪倾角及插入熔池深度的增加均呈现先减小后增大的趋势.在本计算条件下,当侧吹倾角为50°,侧吹喷枪插入深度为0.3 m时,可获得最短的熔池均混时间.铁浴反应器上部空间煤气二次燃烧率随顶部热风喷枪的升高而增大,项枪距熔池液面距离每增加0.2 m,上部空间煤气二次燃烧率可提高约1.1%;随顶枪位置上移,氧气分布范围扩大,气体环流区也随之上移.更多还原

【Abstract】 Based on the commercial computational fluid dynamics software,Fluent,the flow and temperature fields in the iron bath vessel of smelting reduction ironmaking process were simulated,and the effects of top-blown and side-blown operating conditions on the mixing time of bath,composition and temperature distributions of gas phases,and post combustion rate were investigated.The simulated results showed that the mixing time of iron bath increased initially and then decreased with both the increase of inclined degree and immersion depth of side-blown lance.Under the present calculation conditions,the minimum mixing time was achieved for side-blown angle 50 and immersion depth of injection lance 0.3 m.The post combustion rate of gas increased with the increase of top-lance height. The increase of post combustion rate was about 1.1%for every 0.2 m increase of the distance from the top lance to the iron bath level. The dis~buting range increased and circulating zone moved upward with the increase of top lance height.更多还原