To provide a reduction apparatus and a reduction method for direct-reduced iron with a low reduction ratio, whereby a reduction product with a low reduction ratio can be produced without decreasing the crushing strength of the direct-reduced iron.
The SiO2 and CaO contents in a reduction product raw material measured with a reduction product measuring instrument 11, the SiO2 and CaO contents in a raw material measured with a reducing agent measuring instrument 12, and the SiO2 and CaO contents in a binder measured with a binder measuring instrument 13 are taken in as numerical signals, and a material for basicity adjustment is measured so as to set the basicity of the materials at a specified value and supplied to mixer 21. The reduction product raw material, the carbon-material-containing raw material, the binder, and the material for basicity adjustment supplied to the mixer 21 are kneaded in the presence of water, then molded into a massive state with a molding machine 22 to produce a massive raw material 70, dried with a dryer 23, and supplied with a raw material supplying machine 24 to the inside of a rotating bed type reduction furnace 30.
NAKAJIMA HIROSHI
SATO KEIICHI
