A method of iron ore sintering using anthracite and coke as fuel

摘要

PURPOSE: A method for sintering iron ore by using anthracite and coke as fuel is provided to improve sintering productivity without deterioration of strength and recovery ratio of sintered ore through improvement of combustion speed and efficiency of fuel by separately adding coke and anthracite to sintering blended raw materials step by step. CONSTITUTION: In a method for sintering the blended raw materials by blending subsidiary raw materials of iron ore fines (6) and limestone with sintering fuel of coke and anthracite (8), the method for sintering iron ore (6) by using anthracite and coke as fuel comprises the processes of granulating pseudo-grains (6-1) by primarily mixing coke with iron ore fines and limestone and adding water to the mixture in a drum mixer in a step for preparing the sintering blended raw materials; and coating anthracite on the surface of the granulated pseudo-grains by spraying anthracite on the granulated pseudo-grains, wherein the anthracite is sprayed onto the surface of the pseudo-grains in the ore discharge part of first drum mixer or rerolling drum, and wherein the sprayed anthracite (8) is sprayed within one minute to prevent the sprayed anthracite from being secondly granulated with the pseudo-grains (6-1) in the drum mixer.