CAJ | 학술논문

针对鲕状赤铁矿石深度还原过程中有害元素磷在金属相中富集的问题,对深度还原过程中磷富集过程进行了研究.在配碳系数为2.0,还原时间80 min,还原温度分别为1200,1225,1250和1275℃条件下,分析了磷元素在还原物料中的分布规律及还原过程中磷元素的迁移路径.试验结果表明：在1225℃以下时,磷元素含量由渣相内部到相界面逐渐升高,由相界面到金属相内部逐渐降低；1250℃以上时,磷含量由渣相到金属相内部逐渐升高.此外,还原过程中磷元素的走向为：磷元素最初主要存在于磷酸盐中,反应开始后磷酸盐与 C 反应,磷元素被还原为单质磷溶入铁,并在金属相中富集.
침대이상적철광석심도환원과정중유해원소린재금속상중부집적문제,대심도환원과정중린부집과정진행료연구.재배탄계수위2.0,환원시간80 min,환원온도분별위1200,1225,1250화1275℃조건하,분석료린원소재환원물료중적분포규률급환원과정중린원소적천이로경.시험결과표명：재1225℃이하시,린원소함량유사상내부도상계면축점승고,유상계면도금속상내부축점강저；1250℃이상시,린함량유사상도금속상내부축점승고.차외,환원과정중린원소적주향위：린원소최초주요존재우린산염중,반응개시후린산염여 C 반응,린원소피환원위단질린용입철,병재금속상중부집.
As harmful element phosphorus concentrated in iron particles during reduction of oolitic iron ore,the reaction process of phosphorus migration was investigated.During the reaction process,reaction time is 80 min and reaction temperature are 1 200,1 225,1 250 and 1 275 ℃, respectively.Phosphorus distribution are analyzed in slag phase and metal phase and phosphorus migration route is also discussed.The results show below 1 225 ℃ phosphorus content gradually increases from slag phase to phase interface,but decreases from phase interface to inner metal phase,and phosphorus content increases from phase interface to inner metal phase while temperature increases above 1 250 ℃.Phosphorus migration route is also confirmed eventually. Firstly phosphorus exists in phosphate,phosphate reacts with carbon when the reaction begins, and then simple substance phosphorus is created and migrates into metal phase.