w(MgO)对熔剂性球团矿冶金性能的影响  

Effect of w(MgO) on metallurgical properties of flux pellets

作　　者：潘向阳 龙跃 李神子 马保良 杜培培 张玉柱 PAN Xiang-yang;LONG Yue;LI Shen-zi;MA Bao-liang;DU Pei-pei;ZHANG Yu-zhu(School of Metallurgy and Energy,North China University of Science and Technology,T angshan 063210,Hebei,China;Modern Metallurgical Technique Key Laboratory of Ministry of Education,North China University of Science and Technology,Tangshan 063210,Hebei,China;Xingtai Iron and Steel Co.,Ltd.,Xingtai 054027,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210 [2]华北理工大学现代冶金技术教育部重点实验室,河北唐山063210 [3]邢台钢铁有限责任公司,河北邢台054027

出　　处：《钢铁》2019年第10期17-22,共6页Iron and Steel

基　　金：河北省科技计划资助项目(17217691D)

摘　　要：为了研究添加高镁粉时w(MgO)对熔剂性球团矿冶金性能的影响。考察了w(MgO)为1.6%~2.4%时,其对球团矿抗压强度、RI(还原性指数)、RDI(低温还原粉化指数)和RSI(还原膨胀指数)的影响。采用光学显微镜和X射线衍射仪对球团矿微观结构和矿物组成进行了分析。结果表明,随着MgO质量分数的增加,抗压强度呈先升高后降低的趋势,w(MgO)为2.0%时,抗压强度最大,为3 533N;随着w(MgO)由1.6%增加到2.4%,球团矿RI、RDI和RSI得到改善;w(MgO)为1.8%~2.0%时,球团矿微观形貌和矿物组成较好,赤铁矿成片结晶,球团矿强度良好。在用高镁粉和研山精粉造球时,w(MgO)控制为1.8%~2.0%,以期得到较低的还原膨胀指数和较好的冶金性能。In order to study the influence of w(MgO)on metallurgical performances of flux pellets was investigated by adding the high magnesium power.Pellet samples with varying w(MgO)(1.6%-2.4%)were studied for their compressive strength,RDI(reduction degradation index),RI(reducibility index),RSI(reduction swelling index).The optical microscope and the X-ray diffraction were employed to identify the microstructure and the mineral composition of fired pellets.With the increasing of w(MgO),the compressive strength increased firstly and then decreased.When w(MgO)was 2.0%,the compressive strength reached the maximum value,3 533 N.As w(MgO)increasing from 1.6%to 2.4%,the RDI、RI and RSI of the pellet were improved.When w(MgO)is in the range of 1.8% to 2.0%,the micro-morphology and the mineral composition of the pellets are good.The hematite is well crystallized so that the strength of the pellets is good.When the high-magnesium powder and the Yanshan concentration were used to make the ball,w(MgO)in pellets should be controlled in the range of 1.8% to 2.0%in order to obtain a lower reduction expansion index and better metallurgical properties.

关 键 词：MgO质量分数 熔剂性球团矿 冶金性能 矿物组成 

分 类 号：TF0[冶金工程—冶金物理化学]