Process for preparation of ore, equipment for preparation thereof, ironmaking process and ironmaking/steelmaking process

摘要

The invention provides a process for the preparation of ore by which an ore canbe improved so that the oxides of useful elements can be reduced more facilely;equipment for the preparation of ore; an ironmaking process; and an ironmaking/steelmakingprocess. The process comprises heating an ore containing water of crystallization(bound water) to remove the water of crystallization as water vapor and thus forma porous ore, bringing the porous ore into contact with a carbonization gas (organicgas) or organic fluid (such as coal tar) obtained by dry distillation of an organicsubstance (such as wood) to make the organic compounds (such as tar) containedin the carbonization gas or the organic fluid adhere to the surface of the porousore, and heating the porous ore with the organic compounds adhering to the surfaceto 500°C or above to form an ore wherein part of the oxides of iron and otherelements contained in the ore is reduced with carbon contained in the organiccompounds. The reduced ore or the porous ore with organic compounds adheringto the surface is in such an improved state that the oxides of iron and other elementscontained can be more facilely reduced in the smelting step in ironmaking or steelmaking.