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| Effect of MgO on Structure and Strength of Hematite Roasted Briquetting |
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Received:June 19, 2018
Revised:June 25, 2018
Accepted:June 26, 2018
Published Online:September 19, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2018.10.002 |
| KeyWord:MgO; hematite; magnetite; structure; compressive strength |
| Author | Institution |
| zhujianguo |
内蒙古科技大学 |
| sunchenchen |
内蒙古科技大学 |
| luoguoping |
内蒙古科技大学材料冶金学院 |
| WANG Yong-bin |
内蒙古科技大学材料冶金学院 |
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| Abstract: |
| Calcined briquetting was prepared by adding MgO to hematite. Mechanism of effect of MgO addition on composition and compressive strength of roasting compaction was investigated with combination of ore phase microscopy, scanning electron microscopy, compressive strength testing, and FactSage thermodynamic calculations. The results show that porosity drops obviously with increase of MgO addition. Magnetite content in roasting briquetting rises and hematite content drops with increase of MgO content. The interwoven structure of hematite and magnetite has good comprehensive micro-mechanical properties. In oxidative roasting process, magnetite content should be raised appropriately to increase compressive strength of briquetting. When addition amount of MgO is 2% and 4%, magnetite content in calcined briquetting is 18.97% and 24.16% respectively, and compressive strength of every briquetting is 1.924 kN and 1.993 kN respectively without binder addition. |
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