含鐵硅酸鹽礦物重構與選擇性回收

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基金項目:

國家自然科學基金資助項目(51304012)

中國博士后科學基金資助項目(2014M550845)

鋼鐵冶金新技術國家重點實驗室開放基金資助項目(KF 13-04,KF 13-05)

Reengineering and selective recovery of iron-bearing silicate minerals

1. State Key Laboratory of High-Efficient Mining and Safety of Metal Mines(Ministry of Education), University of Science and Technology Beijing, Beijing 100083, China;
2. Laiwu Iron and Steel Group, Lunan Mining Co., LTD, Linyi 276400, China;
3. State Key Laboratory of Multiphase Complex Systems State, Institute of Process Engineering, Chinese Academy of Sciences (IPE-CAS), Beijing 100190, China

摘要: 回收含鐵硅酸鹽礦物是實現鞍山式貧磁鐵礦再選中礦綜合利用的關鍵之一,但這一回收過程應有選擇性:一段磁選尾渣TFe僅為3.92%,不予以回收;而二段尾渣TFe為34.51%,可將其返回直接還原配料,予以間接回收。還原溫度1150℃、還原時間45 min、石灰石用量16%以及還原煤用量12%時,閉路實驗獲得的最優粉末鐵TFe為92.69%,εFe為91.17%。含鐵硅酸鹽中鐵元素被還原為單質鐵,硅元素最終重構為硅灰石。
- 硅酸鹽礦物 /
- 重構 /
- 直接還原 /
- 選擇性回收 /
- 鐵
Abstract: The recovery of iron-bearing silicate minerals is a key on the re-separation middlings of Anshan type lean magnetite,but this recovery process should be conducted selectively. The iron grade of stage 1 tailing is only 3.92%,so there is no need to recover it. However,the iron grade of stage 2 tailing is 34.51%,thus this tailing can be returned to the mixing process before direct reduction and its iron is indirectly recovered. Under the condition of the direct reduction temperature of 1150℃,the direct reduction time of 45 min,the limestone dosage of 16% and the coal dosage of 12%,the optimum TFe and εFe obtained from closed-circuit experiment is 92.69% and 91.17%. Iron and silicon in the iron-bearing silicate are reduced to elemental iron and reengineered to aedelforsite,respectively.
- silicate minerals /
- reengineering /
- direct reduction /
- selective recovery /
- iron