无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (11): 130-138.doi: 10.19964/j.issn.1006-4990.2023-0072

• 环境·健康·安全 • 上一篇    下一篇

铝灰资源化制备拟薄水铝石的研究

滕家阳1(), 冯庆革1,2(), 张璇1, 覃方红1, 冯靖航1, 胡嘉文3, 陈超宏3   

  1. 1.广西大学资源环境与材料学院,广西 南宁 530004
    2.广西高校环境保护重点实验室,广西 南宁 530004
    3.台泥(贵港)水泥有限公司,广西 贵港 537100
  • 收稿日期:2023-02-14 出版日期:2023-11-10 发布日期:2023-11-16
  • 通讯作者: 冯庆革,男,博士,教授;E-mail:fengqg@gxu.edu.cn
  • 作者简介:滕家阳(1997— ),男,在读硕士,主要研究方向为固体废弃物资源化利用;E-mail:964270321@qq.com
  • 基金资助:
    广西创新驱动发展专项(桂科AA17204066);广西创新驱动发展专项(桂科AA18242007-4)

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

TENG Jiayang1(), FENG Qingge1,2(), ZHANG Xuan1, QIN Fanghong1, FENG Jinghang1, HU Jiawen3, CHEN Chaohong3   

  1. 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:2023-02-14 Published:2023-11-10 Online:2023-11-16

摘要:

拟薄水铝石因具有较强的黏结性和在酸性条件下触变凝胶等特性,可作为黏结剂、催化剂载体和原料应用于石油化工、建筑及环保等行业。以危险废物铝灰为原料,经高温焙烧、碱液浸出后通过水热反应制备拟薄水铝石;采用响应面法考察了加热温度、NaHCO3质量分数和反应时间在水热反应中的交互影响,分析了拟薄水铝石物相组成、化学组分、微观形貌和胶溶性能。结果表明:焙烧能有效去除铝灰中氮化铝并固定氟化物,碱浸后铝的相对提取率为36.59%;由NaAlO2溶液制备拟薄水铝石的最佳水热反应条件为加热温度为98 ℃、NaHCO3质量分数为11%、水热反应时间为2 h;对反应制备的拟薄水铝石进行两次洗涤可得到纯度较高、胶溶指数达到95.22%的产物,其比表面积、孔容分别为219.17 m2/g、0.30 cm3/g。最终制备的拟薄水铝石同其他无机铝法制备产物相比,比表面积更高;制备方式上同醇铝法相比,成本更低。

关键词: 拟薄水铝石, 铝灰, 碱液浸出, 水热反应, 响应面法

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

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