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Published in:
2016 | OriginalPaper | Chapter
Economic Analysis of Producing Alumina with Low-Grade Bauxite(Red Mud) by Calcification-Carbonization Method
Authors : Zhao Qiuyue, Zhang Zimu, Zhu Xiaofeng, Liu Yan, Lv Guozhi, Zhang Ting’an, Wang Shuchan
Published in: Light Metals 2014
Publisher: Springer International Publishing
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Calcification-carbonization is a new method of producing alumina with low-grade bauxite (red mud). Low-grade bauxite (red mud) are all converted into garnet hydration during calcification process, then garnet hydration are treated with CO2 and the new structure red mud are gained by digestion. Main components of the new sturcture red mud are CaSiO3 and CaCO3, it can be used directly for cement industry and Bauxite resource recycling is carried out. A series of experiments were done by our team and confirmed that the new method was feasible, A/S of new structure red mud dropped to 0.21 and the content of sodium is under 0.2%. Process calculation software METSIM was used to design and simulate the new process of producing alumina with low-grade bauxite (red mud) by calcification-carbonization method, and its economic with series process and bayer process was analyzed.