粘土原料の脱鉄精製
ハイドロサルファイトによる還元処理-II
1973 年 13 巻 2 号 p. 55-64
詳細
1973 年 13 巻 2 号 p. 55-64
The removal treatment of iron oxide from clay is commonly carried out in air with agitation by using reducing agent, but amount of iron oxide extracted is different with agitating methods.
In this experiment, in order to remove iron oxide from clay, ball mill and glass beaker were used for the reaction chamber with sodium dithionite and sulfuric acid, and the influence of reaction chamber on the extraction of iron oxide from clay was studied.
When removal treatments of iron oxide from clay were carried out with ball mill, it was found that the amount of iron oxide extracted were increased and the amount of reducing agent were lowered in comparison with case of beaker test in air.
The 20 to 30 r. p.m. of ball milling were the optimum conditions and the amount of iron oxide extracted decreased with increasing the number of revolutions by reason of the disproportionation of sodium dithionite.
