| 利用高铝粉煤灰制备氢氧化铝的实验 |
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| 引用本文： | 丁宏娅,马鸿文,王蕾,李贺香.利用高铝粉煤灰制备氢氧化铝的实验[J].现代地质,2006,20(3):405-408. |
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| 作者姓名： | 丁宏娅 马鸿文 王蕾 李贺香 |
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| 作者单位： | 中国地质大学,矿物材料国家专业实验室,北京,100083 |
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| 基金项目： | 中国地质大学矿物材料国家专业实验室开放基金项目(04101) |
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| 摘 要： | 以无水碳酸钠为助剂,分解高铝粉煤灰中的莫来石和铝硅酸盐玻璃相。经中温烧结、酸浸使硅铝分离,调节pH值为5~6纯化含铝滤液,通入CO2气体酸化等工序,可制备氢氧化铝粉体。采用X射线粉末衍射、扫描电镜、化学分析方法对制品进行表征,结果表明:制备的氢氧化铝为球形颗粒,其粒径为200 nm左右,性能达到GB/T4294—1997的三级标准。实验所采用的工艺路线是高铝粉煤灰资源化高效利用的有效途径之一。
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| 关 键 词： | 高铝粉煤灰 氢氧化铝 氧化铝资源 |
| 文章编号： | 1000-8527(2006)03-0405-04 |
| 收稿时间： | 01 15 2006 12:00AM |
| 修稿时间： | 04 12 2006 12:00AM |
Preparation of Aluminum Hydroxide from High-alumina Fly Ash: An Experimental Study |
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| DING Hong-ya,MA Hong-wen,WANG Lei,LI He-xiang.Preparation of Aluminum Hydroxide from High-alumina Fly Ash: An Experimental Study[J].Geoscience——Journal of Graduate School,China University of Geosciences,2006,20(3):405-408. |
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| Authors: | DING Hong-ya MA Hong-wen WANG Lei LI He-xiang |
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| Institution: | Laboratory of Mineral Materials, China University of Geosciences, Beijing 100083, China |
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| Abstract: | With sodium carbonate as an auxiliary agent to decompose the mullite and aluminosilicate glass phases of high-alumina fly ash from a coal power plant in northern China, the aluminum hydroxide was prepared by sintering the raw materials at intermediate temperature, acid-leaching to separate silica and alumina from the sintered materials, adjusting the pH value of the filtered aluminum chloride solution ranging from 5 to 6 to purify the filtrate, and acidifying by entrance of CO2. XRD, SEM and chemical analysis methods were used to characterize the aluminum hydroxide product. The experimental results indicated that the prepared aluminum hydroxide, with granular size around 200 nm in diameter, was spherical particles in shape, and satisfied with the China National Chemical Standard GB/T4294-1997. These results demonstrate that this technique is industrially feasible to utilize this sort of high-alumina fly ash as a potential alumina resource in the future. |
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| Keywords: | high-alumina fly ash aluminum hydroxide alumina resource |
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