Method for charging raw materials into blast furnace

A method for charging raw materials into a blast furnace, the blast furnace including a bell-less charging device that includes a plurality of main hoppers and an auxiliary hopper at a furnace top portion, and a collecting hopper the auxiliary hopper having a smaller capacity than the main hoppers,

• the method comprising discharging ore (x) charged in at least one of the plurality of main hoppers, the ore (x) having a JIS reducibility index (RI) of greater than 55%, and then sequentially charging the ore (x) from a furnace center side toward a furnace wall side by using a rotating chute, wherein
• after charging of the ore (x) is started, only the ore (x) is charged from the rotating chute by way of the collecting hopper, at least until charging of 45 mass % of the ore (x) is completed based on a total amount of the ore (x) to be charged per batch;
• then, at a point in time, discharging of low-reactivity ore (y) charged in the auxiliary hopper is started, the low-reactivity ore (y) having a JIS reducibility index (RI) of 55% or less;
• and then, the low-reactivity ore (y) is charged together with the ore (x) from the rotating chute by way of the collecting hopper for a time period,
• wherein the low-reactivity ore (y) is charged exclusively to a region having a low reduction load in the blast furnace radial direction.