The invention belongs to the field of
ferrous metallurgy and relates to a
blast furnace iron-making process using water-
coal-
slurry as fuel and
reducer for iron-making. The process using water-
coal-
slurry is simple and safe, and the injecting process of water-
coal-
slurry provides convenience for accurate control and precise measurement. A water-coal-slurry
oxygen blast furnace utilizes normal-temperature
oxygen and water-coal-slurry as fuel which is injected into the
blast furnace so as to partially displace
coke and
coal dust; the injected amount of
oxygen is 200 to 500 Nmt HM, the injected amount of water-coal-slurry is 200 to 400 Nm / t HM, the required weight ratio between coal and water in the water-coal-slurry is 7:3, and the required thermal value of the water-coal-slurry is larger than 20 MJ / kg. The water-coal-slurry is decomposed and burnt to generate water-gas reaction in a circulation zone of a blast-furnace
tuyere, the absorbed heat can be adopted to solve the problem of 'lower hot' caused by
smelting with prior oxygen blast furnaces, and a large amount of gas generated by the
decomposition and burning of the water-coal-slurry raises and can relieve the problem of 'upper cold' caused by the full-oxygen injection of the blast furnace; and the water-coal-slurry oxygen blast furnace contains rich H2 so as to enhance the penetrating power and reduction performance of blast-furnace
coal gas, raise the indirect reduction degree of the blast furnace and reduce the emission amount of CO2 by 200 to 500 Nm / t HM. The process reduces both manufacturing cost and
pollution to environment.