公开(公告)号：US20040237718A1

公开(公告)日：2004-12-02

申请号：US10813140

申请日：2004-03-29

申请人： VOEST-ALPINE Industrieanlagenbau GmbH & Co.

发明人： Leopold Werner Kepplinger ,  Johann Reidetschlager ,  Johannes Schenk ,  Siegfried Zeller ,  Konstantin Milionis ,  Hanspeter Ofner

IPC分类号： C21B011/00

CPC分类号： C21B13/0033 ,  Y02P10/122 ,  Y02P10/126 ,  Y02P10/128 ,  Y02P10/136

摘要： In a process for reducing iron-ore-containing particulate material in at least a two-stage process, reducing gas is conducted through at least two reaction zones consecutively arranged in series and formed by a moving particulate material and the particulate material passes through the reaction zones in reverse order to the reducing gas, with the particulate material being heated in the reaction zone arranged first for the particulate material and being reduced in the further reaction zone. In order to achieve a maximum preheating temperature without any formation of magnetite, the reducing gas added to the first reaction zone is conditioned such that no or hardly any reduction takes place, although for the particulate material a preheating temperature within the fringe range of starting a reduction is achieved, whereby either the degree of oxidation of the reducing gas is increased or the temperature of the reducing gas is decreased or both measures are carried out jointly and whereby, in the reactor zone arranged second for the iron ore, a temperature level of at least about 600null C., preferably in the range of between 600 and 700null C., in particular of between 620 and 660null C., is adjusted and the iron-oxide-containing material is reduced to wuestite.

摘要翻译： 在至少两阶段工艺中还原含铁矿石颗粒材料的方法中，还原气体通过至少两个串联连续排列的反应区进行，并由移动的颗粒材料形成，颗粒材料通过反应 区域与还原气体相反，其中颗粒材料在反应区域中被加热，首先用于颗粒材料并在另外的反应区域中被还原。 为了达到最大预热温度而没有任何形成磁铁矿，添加到第一反应区域的还原气体被调节，使得不发生或几乎不发生任何还原，尽管对于颗粒材料，预热温度在起始 由此可以减少还原气体的氧化程度，还原气体的温度降低或两者兼而有之，由此在铁矿石排列第二的反应器区域中， 至少约600℃，优选在600和700℃之间，特别是在620和660℃之间，并且将含铁氧化物的材料还原成为硅酸盐。