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Minerals 2016, 6(2), 31; doi:10.3390/min6020031

Restraining Sodium Volatilization in the Ferric Bauxite Direct Reduction System

State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (USTB), Ministry of Education, Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
State Key Laboratory of Mineral Processing, Beijing General Research Institute of Mining and Metallurgy, Beijing 100070, China
Industrial Research Department, China Noferrous Metals Industry Association Recycling Metal Branch, Beijing 100037, China
Author to whom correspondence should be addressed.
Academic Editor: William Skinner
Received: 27 December 2015 / Revised: 22 February 2016 / Accepted: 21 March 2016 / Published: 31 March 2016
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Direct reduction is an emerging utilization technology of ferric bauxite. However, it requires much more sodium carbonate than ordinary bauxite does. The volatilization is one of the most significant parts of sodium carbonate consumption, as reported in previous studies. Based on the new direct reduction method for utilization of ferric bauxite, this paper has systematically investigated factors including heating temperature, heating time, and sodium carbonate dosage influencing sodium volatilization. For the purpose of reducing sodium volatilization, the Box–Benhken design was employed, and the possibility of separating iron and sodium after direct reduction was also investigated. View Full-Text
Keywords: ferric bauxite; alumina leaching; sodium volatilization; pyrolysis; direct reduction ferric bauxite; alumina leaching; sodium volatilization; pyrolysis; direct reduction

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Hu, W.; Wang, H.; Liu, X.; Sun, C.; Duan, X. Restraining Sodium Volatilization in the Ferric Bauxite Direct Reduction System. Minerals 2016, 6, 31.

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