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近几年来,随着本钢自产铁矿粉的逐年减产,我厂使用的含铁料有了较大变化,大量地方矿开始在我厂应用,1997年,又陆续开始使用澳矿粉,为今后使二铁厂炼铁炉料质量有所改观,现将生产中应用地矿粉和澳矿粉情况做一比较。一、两种含铁料对比及烧结适用性地方矿粉由于生产厂家较多,矿脉复杂,使进厂的地矿TFe低,SiO_2高,成份波动大。TFe平均64.5%,波动范围59～69%,因属细磨精矿粒度细。澳矿粉TFe63.3%,SiO_2为4%,波动范围为±0.5%,±0.2%,属原生矿、粒度较粗,且大于0.5mm,小于6mm在50%以上。我厂烧结生产体系在没配地矿粉前属高铁低硅、高R、使烧结矿可达到高TFe、低FeO、较好的强度,配用地方矿后,使烧结矿TFe下降SiO_2上升,该体系被打破,且烧结
In recent years, with the annual reduction of iron ore produced by itself, the iron-bearing materials used by our factory have undergone great changes. A large number of local mines began to be used in our factory. In 1997, they started to use ore powder, For the future iron ore factory in the second ironmaking material quality has changed, now the production of ore powder and ore situation to do a comparison. First, the contrast of two iron-containing materials and sintering applicability Local mineral powder due to more manufacturers, veins complex, so that the ground into the plant TFe low, high SiO2, volatile components. Average TFe 64.5%, the fluctuation range of 59 to 69%, because fine grinding fine grain size. Australian ore powder TFe63.3%, SiO_2 to 4%, the fluctuation range of ± 0.5%, ± 0.2%, is a native ore, coarse particle size, and more than 0.5mm, less than 6mm in more than 50%. The sintering production system of our factory is a high-iron low-silicon and high-R pre-ore blast furnace ore that can achieve high TFe, low FeO and good strength. When used with local mines, the TFe of sinter decreases, The system is broken and sintered