Method For Manufacturing Molten Iron Using Non-Coking Coal And Fine Iron Ore And Device For Manufacturing Molten Iron

摘要

The present invention relates to a method for manufacturing molten iron using ordinary coal and iron ore, and to a molten iron manufacturing apparatus, which can not only minimize the loss of iron ore reduction due to the firing of secondary raw materials, but also add iron ore by the amount of reduced secondary raw materials. To provide a molten iron manufacturing method and a molten iron manufacturing apparatus that can be charged to increase the productivity, the purpose is.;The present invention relates to a method for producing molten iron using a molten iron manufacturing apparatus having one or two or more reduction furnaces and a molten gasifier connected to ore communication through a reduced iron discharge pipe.;40-60% by weight of the total subsidiary materials charged into the reduction furnace are supplied through the reduced iron discharge pipe; The particle size of the secondary material supplied through the reduction furnace is 8mm or less, and the particle size of the secondary material supplied through the reduced iron discharge pipe is 2mm or less; And;In the reduced iron discharge pipe, the main raw material supplying position is a molten iron manufacturing method and molten iron manufacturing method using ordinary coal and iron ore which are determined so that the time to reach the molten gas furnace at the time of subsidiary material loading is at least 15 seconds. .