CAJ | 학술논문

为研究转炉的局域搅拌和混匀效果，以55 t 转炉为原型，建立转炉水模型，在不同喷吹条件下，通过多点测量的方式，对转炉进行水模拟实验。结果表明：纯底吹条件下，底部中心处的混匀时间较短；顶吹条件下，底部中心处搅拌最弱；顶底复吹条件下，随着枪位的升高，熔池内4个测量点的混匀时间均先变小后增大，并找到平均混匀时间最短的底吹方式，在此底吹布置方式下的枪位为0．16 m 时，侧壁面的上部和下部以及环流中心附近混匀效果较好，枪位为0．20 m 时，底部中心处的混匀时间最短。进一步比较底吹对称布置和非对称布置下的搅拌和混匀效果可知，底吹喷嘴的非对称且集中布置更有利于改善转炉内流场，减少搅拌弱区。
위연구전로적국역교반화혼균효과，이55 t 전로위원형，건립전로수모형，재불동분취조건하，통과다점측량적방식，대전로진행수모의실험。결과표명：순저취조건하，저부중심처적혼균시간교단；정취조건하，저부중심처교반최약；정저복취조건하，수착창위적승고，용지내4개측량점적혼균시간균선변소후증대，병조도평균혼균시간최단적저취방식，재차저취포치방식하적창위위0．16 m 시，측벽면적상부화하부이급배류중심부근혼균효과교호，창위위0．20 m 시，저부중심처적혼균시간최단。진일보비교저취대칭포치화비대칭포치하적교반화혼균효과가지，저취분취적비대칭차집중포치경유리우개선전로내류장，감소교반약구。
In order to investigate the local and stirring effect of converters,a converter water model whose prototype is a 55 t converter is built.The method of multi‐electrode simultaneous detection is used under different blowing ways.Under pure bottom blowing conditions,the mixing time at the bottom center is relatively short.While,in the condition of top blowing,the weak stirring zone is at the bottom center.In the condition of top‐bottom combined blowing,with the increase of lance height,the mixing time of the position of the 4 measuring points in BOF bath first decrease and then increase.And the bottom nozzles layout is obtained when the average mixing time is the shortest.When the lance height is 0.16 m,the mixing effect is better on the upper and lower part of the sidewall and at the center of circulation;when the lance height is 0.20 m,the mixing time at the bottom center is the shortest.The stirring and mixing effect of the symmetrical and the asymmetrical layout of bottom blowing nozzles is compared,and it’s found the asymmetrical and centralized arrangement is more conductive to improve the flow field of the converter and reduce weak stirring zones.