Extraction of Metals from Boiler Slag by Sintering

文献类型： 外文期刊

第一作者： Li Jinping

作者： Li Jinping;Hou Haobo;Li Jinping;Gan Jinhua

作者机构：

关键词： boiler slag;Al extraction efficiency;Fe extraction efficiency;leaching;alumina

期刊名称：JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION （ 影响因子：0.957； 五年影响因子：0.959 ）

ISSN： 1000-2413

年卷期： 2009 年 24 卷 5 期

页码：

收录情况： SCI

摘要： A new method of recycling aluminum and iron in boiler slag derived from plants that use coal as fuel was presented. The new method can integrate efficient extraction and reuse of the leached pellets together. An elemental analysis of aqueous solutions leached by sulfuric acid was conducted by the EDTA-Na(2)-ZnCl(2) titration method, and the components and microstructures of the samples were examined by means of XRF, XRD and SEM. An aluminum extraction efficiency of 86.50% was achieved when the sintered pellets were leached using 4 mol.L(-1) H(2)SO(4) with solid/liquid ratio(m/V) of 1 : 5 at 80 degrees C for 24 h. An iron extraction efficiency of 94.60% was achieved under the same condition for the maximum extraction efficiency of Al. The extraction efficiency of Al and Fe increased with temperature, leaching time and acidity. The concentration of alumina and iron hydroxide in the final product was determined to be 99.12% and 92.20% respectively. This product of alumina would be used directly for the production of metallic aluminum.

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