本发明描述了用于制造由铁矿石，其在还原竖炉中由热还原气体的装置减少到海绵铁海绵铁的方法。 为了这个目的，在一个化油器（2）产生的，冷藏，和旋风分离器（12）中引入纯化还原气体与在范围750和900℃之间在竖炉（1）在喧闹平面（5）的水平的温度。 下面喧嚣平面（5）的还原气体是在低于的在喧闹平面导入还原性气体，优选在650和750℃之间的范围内引入的温度，在竖炉（1）的温度。 EST实现海绵铁的提高渗碳。 一种增强的碳沉积也可通过竖炉的下部的横截面的放大的体积增加，特别是的结果。 最后，将渗碳由喧闹平面下方的量的比率提供的还原气体的喧嚣平面还原性气体中供给量是由尽可能大的事实促进。

A method for producing a sponge iron from iron ore, which is reduced in a reduction shaft furnace by means of a hot reducing gas to sponge iron is described. For this purpose, the level of the Bustle plane (5) is in a gasifier (2) produced, chilled and in a cyclone (12) purified reducing gas introduced at a temperature in the range between 750 and 900 ° C into the shaft furnace (1). Below the Bustle plane (5) reducing gas is at a temperature which is below the temperature of the introduced in the Bustle plane reducing gas, preferably introduced in the range between 650 and 750 ° C, in the shaft furnace (1). Est is achieved an increased carburization of the sponge iron. Increased carbon capture results further by an increase in volume in particular by a cross-sectional enlargement of the lower part of the shaft furnace. Finally, the carburization is also promoted in that the ratio of the amount of the supplied below the Bustle plane to the quantity of the reducing gas supplied in the Bustle plane reducing gas is made as large as possible.