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| Recovery of Iron Concentrate from Ferrous Cyanide Residue by Magnetization Roasting |
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Received:November 08, 2022
Revised:November 27, 2022
Accepted:November 28, 2022
Published Online:February 13, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.03.006 |
| KeyWord:ferrous cyanide residue; magnetic roasting; magnetic separation; iron concentrate |
| Author | Institution |
| HEN Zhen-ping |
郑州金泉矿冶设备有限公司 |
| XIE Feng |
东北大学 冶金学院 |
| SUN Liu-gen |
东北大学 冶金学院 |
| HAN Lu-yang |
东北大学 冶金学院 |
| DONG Kai-wei |
东北大学 冶金学院 |
| BAI Yun-long |
东北大学 冶金学院 |
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| Abstract: |
| Effects of roasting temperature, roasting time and ratio of carbon to oxygen on roasting process of coal-based magnetization were investigated, and the transformation process of iron-containing oxides was characterized by chemical analysis, XRD, SEM and thermogravimetric analysis. With the increase of roasting temperature, the transformation process of physical phase of iron-containing oxides is Fe2O3→Fe3O4→FeO. With the extension of roasting time of magnetization roasting, Fe2O3 in the tailings is first reduced to Fe3O4 by carbon, and the reduced Fe3O4 can be re-oxidized to Fe2O3 by oxygen in air. Under low ratio of carbon to oxygen conditions, the magnetization rate is close to 2.33. When the ratio of carbon to oxygen exceeds 3, the excess coal is mixed with the tailings, and resulting the incomplete reduction of Fe2O3. The magnetization rate of roasted ore is 2.34 under the optimum roasting conditions including roasting temperature of 645 ℃, roasting time of 45 min, and ratio of carbon to oxygen of 3. |
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