ガーニエライト鉱の強還元焙焼について

ラテライト鉱の石炭含有ペレット法による還元焙焼に関する研究 (第3報)

抄録

Strong reductive roasting, which aims at the high reduction rate of iron, by a coal-containing pellet method have been conducted, for garnieritic ores. The influence of various fundamental factors was investigated on the reduction rate of iron and the grade of residual carbon. Some results obtained are as follows.
A reoxidation method was suitable as a method for determining the reduction rate of iron, because it had no influence of enclosing metallic particles by recrystallization.
Lignite and bituminous coal were suitable to obtain a reduced pellet with high reduction rate of iron and low residual carbon, in comparison with anthracite and cokes.
An addition of coal over some extent was required to obtain the high reduction rate of iron, and a mixed pellet method. in which two types of pellets with a high coal content and little or no coal content, respectively, were mixed, will be effective to obtain a reduced pellet with high reduction rate of iron and low residual carbon.
A high recovery rate of sulfur into reduced pellet was achieved when sulfur was added to ores with coal.