| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for charging a raw material into a blast furnace, which can resolve the problem of permeability deterioration caused by the difference of particle diameters between an ore and a coke when switching a method for charging ore raw materials and the coke into the furnace from a normal individual charging method to a mixture charging method.SOLUTION: When switching a method for charging ore raw materials and a coke into a furnace from an individual charging method to a mixture charging method of charging a mixed raw material of the ore raw materials and the coke, firstly a part of the ore raw materials and the coke charged per charge is simultaneously cut out and charged as a mixture and a first sandwich layer where a first mixture layer is sandwiched between the ore raw material layer and the coke layer is formed, secondly the amount of simultaneously cutout mixture of the ore raw materials and the coke is made somewhat more than the first sandwich layer to form a second sandwich layer sandwiching a second mixture layer, thirdly the amount of simultaneous cutout mixture of the ore raw materials and the coke is gradually increased, and finally all the ore raw materials and the coke are charged into the blast furnace as a simultaneously cutout and mixed complete mixture layer. |
