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| Effect of Additives on Precipitation and Growing of Magnetite during Modifying Progress of Copper Smelting Slag |
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Received:September 10, 2012
Revised:September 11, 2012
Accepted:September 12, 2012
Published Online:May 21, 2013
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| DOI：10.3969/j.issn.1007-7545.2013.06.002 |
| KeyWord:additive; copper smelting slag; magnetite; precipitation; grow |
| Author | Institution |
| CAO Hong-yang |
广州有色金属研究院稀有金属研究所;东北大学材料与冶金学院 |
| WANG Ji-min |
广州有色金属研究院稀有金属研究所 |
| ZHANG Li |
东北大学材料与冶金学院 |
| SUI Zhi-tong |
东北大学材料与冶金学院 |
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| Abstract: |
| The iron in copper smelting slag was enriched with high temperature oxidation modification process. The effects of different kinds of additives on precipitation and growing behavior of magnetite phase were analyzed. The changes of quantity of crystallization, grain size and crystal morphology of magnetite phase under additives were investigated with combination of the analysis of phase diagram, and the mechanisms of action of additives were given a preliminary discussion. The results show that addition of 2%~5% CaO is in favor of magnetite precipitation, and 1%~3% addition of CaF2 can promote precipitation, growing and coarsening of magnetite. The new type of composition additives can obviously promote precipitation and growing of magnetite with the volume fraction of 41.5%~42.4% and 50.2~55.6 μm equiaxed grains. It is beneficial to separation of magnetite from modified slag by mineral processing. |
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