摘要: 本文以安阳常用铁精矿粉为对象,研究了铁矿石的高温液相流动性,重点分析了SiO2、Al2O3和MgO对铁精矿粉液相流动性影响,并依据不同铁精矿粉液相流动的特点,科学的指导国内精粉的相互替代和配加问题,为优化配矿提供科学的支撑和指导。
关键词:铁精矿粉; 烧结; 液相流动性; 配矿方法
Experimental study on liquid phase fluidity of iron concentrate commonly used in Anyang Steel
Qin Hua-wei Guo jun-wei Long Fang
(Anyang Iron&Steel Group anyang, Henan 455000)
Abstract:The commonly used iron concentrates in Anyang Steel are used as the research objects in this study. We studied the high-temperature liquid phase fluidity of iron concentrates. The effects of SiO2, Al2O3 and MgO on the liquid phase fluidity of iron concentrates were emphatically researched. According to the characteristics of liquid phase fluidity of different iron concentrates, the problems in mutual substitution and addition of domestic iron concentrates are solved. This study provides certain scientific support and guidance for the optimization of iron ore fines proportioning.
Key words: Iron ore fines; sintering; Liquid phase fluidity; iron ore proportioning.
0 前言
铁矿石的液相流动性能是铁矿石高温基础特性之一,是指烧结过程中铁矿石与CaO生成液相的流动能力,表征的是粘结相的“有效粘结范围”和浸润性【1】。一般液相流动性较高时,其粘结周围物料的范围也越大,烧结矿强度越高;反之,铁矿粉的液相流动性过低,容易导致液相量不足,使烧结矿强度降低。粘结相的流动性过大,对周围物料的粘结厚度会变薄,烧结矿易形成薄壁大孔结构,导致烧结矿强度下降【2】。利用矿石高温状态下的液相流动性能的差异不仅可以快捷有效地分析铁矿石高温性能的差别,还可以利用铁矿石高温性能的互补性更高效地利用各种品级的铁矿资源,从而使低品质的铁矿资源得到利用。
为此本文根据安钢烧结原料的实际情况,对安钢在用铁精矿粉流动性进行基础研究,以充分认识各种铁精矿粉的流动性能特点,实现优势互补,达到改善烧结矿质量的目的,为安钢烧结配矿提供科学指导。
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