利用高纯铝酸洗废渣制备大孔高比表面积拟薄水铝石研究  

Preparation of Pseudo⁃boehmite with Large Pore Size andHigh Specific Surface Area by Using High Aluminum Pickling Sludge

作　　者：袁辉 贺永东[1] 赵亿坤[1] 孙小涵 刘小龙 杜玉峰 白万全 陈守俊 YUAN Hui;HE Yongdong;ZHAO Yikun;SUN Xiaohan;LIU Xiaolong;DU Yufeng;BAI Wanquan;CHEN Shoujun(School of Physical Science and Technology,Xinjiang University,Urumqi 830046,Xinjiang,China;Shandong Energy Group,Jinan 250100,Shandong,China;Xinjiang Tianlong Mining Co Ltd,Fukang 831500,Xinjiang,China;Xinjiang Nongliushi Aluminum Co Ltd,Wujiaqu 831300,Xinjiang,China;Tianshan Aluminum Co Ltd,Shihezi 832061,Xinjiang,China;Xinjiang Sheng′an New Materials Co Ltd,Hami 839000,Xinjiang,China)

机构地区：[1]新疆大学物理科学与技术学院,新疆乌鲁木齐830046 [2]山东能源集团,山东济南250100 [3]新疆天龙矿业股份有限公司,新疆阜康831500 [4]新疆农六师铝业有限公司,新疆五家渠831300 [5]天山铝业有限公司,新疆石河子832061 [6]新疆盛安新材料股份有限公司,新疆哈密839000

出　　处：《矿冶工程》2024年第2期135-140,共6页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(51861033);新疆维吾尔自治区科技厅重点研发专项项目(2020B02007)。

摘　　要：以硫酸铝、氢氧化钠及高纯铝酸洗废渣为原料,采用双铝法制备拟薄水铝石,研究了pH值、反应温度及尿素添加量对拟薄水铝石的形成及结构的影响与合成条件对拟薄水铝石形成时的物相及结构性能的影响。结果表明,随着反应温度升高,拟薄水铝石比表面积和孔容增大,结晶度提高。pH值6.5~9.5时,可以得到明显的拟薄水铝石物相;pH值达到10.5时,会产生三水铝石相。添加尿素能显著增加拟薄水铝石的比表面积和孔径。Aluminum sulfate,sodium hydroxide,and high⁃aluminum pickling sludge were used as raw materials to prepare pseudo⁃boehmite by adopting a dual aluminum source method.The effects of pH value,reaction temperature,and urea addition on the formation and structure of pseudo⁃boehmite,as well as the effects of synthesis conditions on the phase and structural properties of pseudo⁃boehmite were investigated.The results show that as the reaction temperature increases,the specific surface area and pore volume of pseudo⁃boehmite increase,and the crystallinity also increases.With pH value between 6.5 and 9.5,a clear pseudo⁃boehmite phase can be obtained;with pH value up to 10.5,a trihydrate alumina phase will be formed.The addition of urea can significantly increase the specific surface area and pore size of pseudo⁃boehmite.

关 键 词：双铝法 拟薄水铝石 尿素 孔径 孔容 比表面积 

分 类 号：TB302[一般工业技术—材料科学与工程]