Materials Reports  2021, Vol. 35 Issue (Z1): 132-136 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| The Process Research of Boron Carbide Prepared Basic Magnesium Carbonate |
| WEN Yuan1, HU Shan2, HE Liuwei1
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1 Wuhan Kingfa Technology Co., LTD, Wuhan 430056, China
2 Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China |
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Abstract Magnesium bicarbonate solution was prepared from boron sludge and calcium oxide through digestion and carbonization.and then basic magnesium carbonate was prepared through pyrolysis. The effects of digestion time, dosage of CaO, carbonation ratio of solid to liquid and carbonation pressure on the leaching rate of magnesium from boron sludge were studied. Stability analysis of magnesium bicarbonate solution. The optimal pyrolysis temperature of heavy magnesium water was determined by XRD and the appearance of the product was characterized by SEM. The results showed that the leaching rate of magnesium increased with the increase of digestion time, calcium oxide dosage and carbonization pressure.The optimal digestion time is 2 h, the dosage of calcium oxide is 20%, the carbonation pressure is 0.2 MPa, and the carbonation solid-liquid ratio is 100 g/L. The pyrolysis temperature was 70 ℃ or above, and the product was 4MgCO3·Mg(OH)2·4H2O. The higher the pyrolysis temperature, the more complete the product crystallization and the more simple the product composition. At 90 ℃ for 90 minutes, the efficiency of magnesium bicarbonate solution reached 95.3%, and the appearance of the product changed from needle shape to spherical shape with the increase of pyrolysis temperature.
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Published: 16 July 2021
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| About author:: Yuan Wen, as a postgraduate student at China University of Geosciences (Wuhan) from 2012 to 2015. Now working as a process engineer in Wuhan Kingfa Technology Co., Ltd., mainly engaged in the research on the modification and preparation of rubber and plastic polymer matrix composites. As the first author, he has published 4 papers in domestic academic journals and obtained 4 national invention patents. |
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