CAJ | 학술논문

针对赤泥含铁特点，提出采用碳热还原-磁选法回收赤泥中的铁。将赤泥中的 Fe2 O3转变为具有磁性的Fe3 O4或单质铁，后经磁选得到铁精矿。试验确定的最佳工艺条件为：还原温度1200℃，还原反应时间110 min ，石墨加入量20％，球磨时间30 min ，磁选时的激磁电流7 A。最佳条件下，铁回收率为78．5％，精矿品位为65．7％。
침대적니함철특점，제출채용탄열환원-자선법회수적니중적철。장적니중적 Fe2 O3전변위구유자성적Fe3 O4혹단질철，후경자선득도철정광。시험학정적최가공예조건위：환원온도1200℃，환원반응시간110 min ，석묵가입량20％，구마시간30 min ，자선시적격자전류7 A。최가조건하，철회수솔위78．5％，정광품위위65．7％。
Recovery of iron from red mud by carbon heating reduction-magnetic separation process was investigated .T he results show that the best conditions for recovery iron are reduction temperature of 1 200 ℃ ,reduction time of 110 min ,graphite content of 20 % ,ball milling time of 30 min ,exciting current of magnetic separation of 7 A .Under the best conditions ,the recovery of iron is 78 .5% ,and grade of iron concentrate is 65 .7% .