Inorganic Chemicals Industry >

2023 , Vol. 55 >Issue 11: 130 - 138

DOI: https://doi.org/10.19964/j.issn.1006-4990.2023-0072

Environment·Health·Safety

Study on preparation of pseudo-boehmite from aluminum dross resource treatment

  • TENG Jiayang ,
  • FENG Qingge ,
  • ZHANG Xuan ,
  • QIN Fanghong ,
  • FENG Jinghang ,
  • HU Jiawen ,
  • CHEN Chaohong
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  • 1.School of Resources，Environment and Materials，Guangxi University，Nanning 530004，China
    2.Key Laboratory of Environmental Protection（Guangxi University），Education Department of Guangxi Zhuang Autonomous Region，Nanning 530004，China
    3.Taiwan Cement（Guigang） Corporation，Guigang 537100，China

Received date: 2023-02-14

  Online published: 2023-11-16

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Abstract

The pseudo-boehmite can be used as a binder，catalyst carrier and raw material in the petroleum，construction and environmental protection industries due to its strong adhesion and thixotropic gel characteristics under acidic conditions.Herein，hazardous waste aluminum dross was used as raw material，and pseudo-boehmite was prepared by hydrothermal reaction through high-temperature roasting and alkali solution leaching.The interaction effects of different heating temperatures，the mass fraction of NaHCO3 solution and reaction time on hydrothermal reaction were studied by response surface methodology.The phase composition，chemical composition，microstructure，and peptizing properties of the prepared pseudo-boehmite were analyzed.The results showed that roasting could effectively remove AlN and fixed fluoride contained in aluminum dross，the relative extraction rate of aluminum was 36.59% after alkali solution leaching.The optimal hydrothermal reaction conditions for pseudo-boehmite preparation with NaAlO2 solution were obtained by experiments as follows：a heating temperature of 98 ℃，adding the NaHCO3 with a mass fraction of 11% and a hydrothermal reaction of 2 h.After washing twice，the peptizing index of the product prepared by hydrothermal reaction could reach 95.22% with a high purity.The specific surface area and pore volume of pseudo-boehmite were 219.17 m2/g and 0.30 cm3/g，respectively.Compared with the pseudo-boehmite prepared by other inorganic aluminum methods，the specific surface area of this method was higher，and the cost of this method was lower than that of the pseudo-boehmite prepared by the alcohol aluminum method.

Key words： pseudo-boehmite; aluminum dross; alkali solution leaching; hydrothermal reaction; response surface methodology

Cite this article

TENG Jiayang , FENG Qingge , ZHANG Xuan , QIN Fanghong , FENG Jinghang , HU Jiawen , CHEN Chaohong . Study on preparation of pseudo-boehmite from aluminum dross resource treatment[J]. Inorganic Chemicals Industry, 2023 , 55(11) : 130 -138 . DOI: 10.19964/j.issn.1006-4990.2023-0072

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