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| Effect of CaCO3 on Direct Reduction-Smelting Separation of Vanadium-Bearing Titanomagnetite Concentrate |
| DING Shan， XUE Qing-guo， SHE Xue-feng， WANG Guang， NING Xiao-yu， WANG Jing-song |
| （School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China） |
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Abstract Vanadium-bearing titanomagnetite concentrate was direct-reduced and smelt-separated isothermally with graphite and CaCO3. The influences of alkalinity and cooling technique on reduction and smelting separation were studied. XRD and chemical analysis were used to characterize the reduced samples. Results shows that the increase of alkalinity is beneficial to the reduction and smelting separation of vanadium-bearing titanomagnetite concentrate in the context of low alkalinity[(R=0-0.7)]. Metallized pellets smelt-separated well at the temperature of 1 600℃ after melting 20 minutes with the alkalinity of 0.5, the slag dosen’t include iron nearly. Air-cooling technique is beneficial to increasing anosovite content of slag, but not to separating out of magnesica-alumina spinel. Furnace-cooling technique is beneficial to separating out of magnesica-alumina spinel, but not to increasing anosovite content of slag.
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Received: 30 August 2013
Published: 05 August 2014
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2014, Vol. 49 
