Iron Extraction From Oolitic Iron Ore by a Deep Reduction Process |
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Authors: | Ke-qing LI Wen NI Ming ZHU Mei-juan ZHENG Yuan LI[Author vitae] |
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Affiliation: | Key Laboratory of the Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract: | A laboratory experiment was carried out to extract iron from oolitic iron ore by a deep reduction and magnetic separation technique. The raw coal with fixed carbon of 66. 54% was used as the reductant. The iron was successfully extracted from the oolitic iron ore which otherwise is nearly impossible to be separated due to its extremely fine-grain and mosaic nature. The results showed that an iron recovery rate of 90. 78% and an iron content of 92. 53% of iron concentrate could be obtained by such a technique. The optimized roast temperature is 1200 °C and time is 60 min. The subsequent magnetic separation was performed by using a magnetic field intensity of 111 kA · m−1 and a grinding fineness less than 45 μm of 96. 19% for the sintered product. |
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Keywords: | oolitic hematite deep reduction magnetic separation |
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