Metallurgical and Materials Transactions B

, Volume 49, Issue 5, pp 2906–2916 | Cite as

Study on the Extraction of Aluminum From Aluminum Dross Using Alkali Roasting and Subsequent Synthesis of Mesoporous γ-Alumina

  • Hongwei Guo
  • Jun Wang
  • Xiuxia Zhang
  • Feng Zheng
  • Peng LiEmail author


This study presents a process for recovering aluminum from aluminum dross (an industrial waste product) via an alkali roasting process and using it to synthesize mesoporous γ-alumina. The results show that the inherent chlorides in dross (KCl and NaCl) reduce Al extraction efficiency and should be removed first by water leaching. Use of salt-free dross increases the Al extraction rate (from 85 to 96 pct) within 90 minutes alkali roasting at 923 K (650 °C). In addition, an ammonium bicarbonate byproduct can be obtained from water leaching due to the hydrolysis of AlN, which can be used as a precipitating agent in the boehmite sol preparation. Synthesis of mesoporous γ-alumina was carried out by the sol-gel method with EO20PO70EO20 (P123) as a template. The prepared mesoporous γ-alumina was characterized as having a disordered mesostructure with a high pore volume of 1.02 cm3/g and surface area of 312 m2/g. Thus, we achieved highly efficient utilization of aluminum dross and yielded products with high added value. Mesoporous γ-alumina has potential applications in environmental remediation and catalysis.



The National Natural Science Foundation of China (Nos. 51704202, 51604169, 51604178), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No. 17KJB450002) are duly acknowledged for their financial support. The authors also thank Soochow University and China University of Petroleum for their support with the analyses.


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2018

Authors and Affiliations

  • Hongwei Guo
    • 1
  • Jun Wang
    • 2
  • Xiuxia Zhang
    • 2
  • Feng Zheng
    • 3
  • Peng Li
    • 1
    Email author
  1. 1.Shagang School of Iron and SteelSoochow UniversitySuzhouP.R. China
  2. 2.College of Chemical EngineeringChina University of PetroleumQingdaoP.R. China
  3. 3.Research Center of Nano Science and Technology, Shanghai UniversityShanghaiP.R. China

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