Iron ore classifier using flue gas and pre-reduction method of iron ore

摘要

In the present invention, iron ore is preliminarily reduced in a multiple fluidized-bed preliminary reduction furnace in a form suitable for each grain size by using an exhaust gas in the production of pig iron, and the particle size of the ore is classified using the exhaust gas after the preliminary reduction, The present invention relates to an iron ore classifying apparatus for partially reducing iron ore to increase the efficiency of the entire system and to facilitate control of the system, and a pre-reducing method of iron ore using the apparatus.