典型钒钛磁铁矿的烧结基础特性

近年来,钒、钛和铬等重要金属的价格飞涨,钒钛磁铁矿资源的高效开发利用,不仅能缓解铁矿石资源的短缺问题,还能很好地解决重要金属的供需矛盾,有利于中国钢铁工业的可持续发展。通过微型烧结设备对国内使用量较大的5种典型钒钛磁铁矿的烧结基础特性进行了系统研究,同时使用XRD和SEM-EDS对精矿粉的物相组成进行了分析。研究表明,钒钛磁铁矿的基础特性与其化学成分和物相组成的联系紧密,低钛型钒钛磁铁矿的主要物相为磁铁矿,烧结基础特性的综合评价指数相对较好,其中CJ矿的最好,而高钛型钒钛磁铁矿的主要物相为磁铁矿和钛铁矿,它们的烧结基础特性均很差。总体来说,钒钛磁铁矿的烧结基础特性普遍较差,在使用过程中应尽可能与烧结基础特性较好的铁精矿搭配。

Basic sintering characteristics of several typical vanadium titanium magnetite

In recent years, the prices of important metals such as vanadium, titanium, and chromium have skyrocketed. The efficient development and utilization of vanadium titanium magnetite resources can not only alleviate the shortage of iron ore resources, but also solve the contradiction between supply and demand of important metals. It is conducive to the sustainable development of China′s steel industry. The sintering basic characteristics of five typical vanadium titanium magnetite concentrates with large domestic usage were systematically studied by micro-sintering equipment. The phase composition of vanadium titanium magnetite concentrate was analyzed by XRD and SEM-EDS. The results show that the sintering basic characteristics of vanadium titanium magnetite are closely related to its chemical composition and phase composition. The main phase of low-titanium vanadium titanium magnetite is magnetite, and the comprehensive evaluation index of sintering basic characteristics is relatively better, of which CJ is the best. However, the main phase of high-titanium vanadium titanium magnetite is magnetite and ilmenite, their basic characteristics are very poor,which is mainly affected by titanium. On the whole, the vanadium titanium magnetite has a poor sintering basic characteristic and should be matched with iron concentrate with better basic characteristics as much as possible.