リモナイト鉱の選択還元焙焼について

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1報)

抄録

Reductive roasting is an important pre-treatment stage of the extractive metallurgical processes of laterite ore. A coalcontaining pellet method, in which ore pellets containing coals are roasted in a combustion gas atmosphere, seems to have economical and technical advantages over the conventional methods. This paper is concerned with various fundamental factors in the selective roasting of limonitic ores.
A high reduction rate of nickel and a selective metallization of nickel were achieved in the coal-containing pellet method. Lignite and bituminous coal were suitable as effective reagents for reduction.
The influences of temperature and addition rate of coal on the reduction of nickel and iron were discussed, and the mechanism of reduction in the coal-containing pellet method was considered based on the temperature dependency of the amount of reductive gas evolved from coal as well as the chemical reactions.