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碱度对细粒级铁矿粉球团性能的影响 被引量:15

Effect of basicity on properties of pellets produced by ultra fine-sized iron concentrate
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摘要 为了研究配加石灰石粉,球团矿碱度提高后其性能的变化,以细粒级铁矿粉为铁料开展了试验。结果表明,二元碱度(w(CaO)/w(SiO_2))由基准期的0.2提高到0.4、0.6、0.8、1.0、1.2、1.4后,生球性能没有发生明显的变化,其适宜的预热温度保持不变,而其焙烧温度可降低20℃。随着碱度的提高,其焙烧球抗压强度呈升高趋势,当球团矿碱度为1.2时,达到最大值。冶金性能试验结果表明,随着碱度的提高,球团矿的还原度呈升高趋势,当碱度达到0.8时,还原膨胀率达到最大值。 The experiments were carried out to determine the effect of basicity on properties of pellets by adding limestone powder and adjusting basicity from 0.2 to 1.4. The results indicate that there is no remarkable effect on properties of green pellets with the increase of basicity. It is also found that roasting temperature will decrease by 20℃. However, compressive strength of roasted pellets increases with the increase of pellets basicity and reaches a maximum value with basicity being 1.2. The results on metallurgical properties testing indicate that reduction index increases with the increase of pellets basicity, but reduction swelling index reaches a maximum value with basicity being 0.8.
作者 范建军 郭宇峰 臧龙 史永林 李昊堃 郑富强 FAN Jian-jun;GUO Yu-feng;ZANG Long;SHI Yong-lin;LI Hao-kun;ZHENG Fu-qiang(Technology Center, Taiyuan Iron and Steel (Group) Co., Ltd., Taiyuan 030003, Shanxi, China;School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China;Lanxian Mine Corporation, Taiyuan Iron and Steel (Group) Co., Ltd., Lüliang 033599, Shanxi, China)
出处 《钢铁研究学报》 CAS CSCD 北大核心 2019年第5期440-445,共6页 Journal of Iron and Steel Research
关键词 预热球强度 焙烧球强度 铁矿粉 碱度 compressive strength of preheated pellet compressive strength of roasted pellet iron concentrate basicity
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