KR法中桨叶尺寸对流场影响的研究  

Influence of impeller size on the flow structure in a KR method

作　　者：孙伟 贾舒渊 欧阳德刚 贺铸[2,3] SUN Wei;JIA Shuyuan;OUYANG Degang;HE Zhu(Baosteel Central Research Institute(Qingshan),Wuhan 430083,China;Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]宝钢股份中央研究院(青山),湖北武汉430083 [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,湖北武汉430081 [3]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081

出　　处：《炼钢》2022年第5期31-37,共7页Steelmaking

基　　金：国家自然科学基金资助项目(51974211)。

摘　　要：KR (Kambara reactor)法是现今铁水预处理脱硫过程的主要方法。采用数值模拟的方法,研究了不同桨叶直径对KR脱硫中铁水的流场及速度分布、脱硫剂分布情况的影响。结果表明:随着桨叶直径的增加,增大了铁水包近壁面、底部区域的铁水流动速度,使脱硫剂在包底占比逐渐增加,从而提高了脱硫效果。与原桨叶相比,桨叶直径增加50 mm,混匀时间减少了24.7%。根据武钢有限炼钢厂试验结果,使用增大直径50 mm后的桨叶进行脱硫,脱硫剂消耗量减少1.2 kg/t。KR(Kambara reactor) method is the main method of hot metal pretreatment desulfurization process. The effects of different blade diameters on hot metal flow field, velocity distribution and desulfurizing agent particles distribution in KR desulfurization were studied by numerical simulation. The results showed that with the increase of blade diameter, the flow velocity of hot metal near the hot metal ladle wall and the bottom of ladle were increased, and the proportion of desulfurizer in the "dead zone" was gradually increased, and the desulfurization effect was improved. Compared with the original impeller, the blade diameter was increased by 50 mm and the mixing time was reduced by 24.7 %. According to the industrial test results of Steelmaking Plant of Wuhan Iron & Steel Co.,Ltd.,the consumption of desulfurizer was reduced by 1.2 kg/t when the blade with an increased diameter of 50 mm was used.

关 键 词：铁水脱硫 KR脱硫 数值模拟 桨叶直径 

分 类 号：TF704.3[冶金工程—钢铁冶金]