| 浸取铝灰制取纳米氧化铝新工艺 |
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| 引用本文： | 刘晓红,刘守信,邹美琪,许春晓,柯春兰.浸取铝灰制取纳米氧化铝新工艺[J].无机盐工业,2009,41(8). |
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| 作者姓名： | 刘晓红 刘守信 邹美琪 许春晓 柯春兰 |
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| 作者单位： | 南昌大学环境与化学工程学院,江西南昌,330031 |
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| 摘 要： | 介绍了一条回收铝灰中的铝制备纳米氧化铝的新工艺.用硫酸浸取电解铝工业中产生的铝灰,得到硫酸铝溶液,实验研究各参数对浸取过程的影响,得到适宜工艺条件;将硫酸铝溶液和碳酸氢铵反应生成碳酸铝铵沉淀,过滤、洗涤、焙烧碳酸铝铵得氧化铝粉体.实验研究了分散剂类型、分散剂用量、铝盐浓度对氧化铝粒径的影响,得出优化工艺条件.经X射线衍射分析和扫描电镜检测表明所得产品为粒径约70 nm的α-Al2O3.
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| 关 键 词： | 铝灰 纳米氧化铝 碳酸氢铵 碳酸铝铵 |
New technology of preparing nano - sized alumina by leaching aluminium ash |
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| Liu Xiaohong,Liu Shouxin,Zou Meiqi,Xu Chunxiao,Ke Chunlan.New technology of preparing nano - sized alumina by leaching aluminium ash[J].Inorganic Chemicals Industry,2009,41(8). |
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| Authors: | Liu Xiaohong Liu Shouxin Zou Meiqi Xu Chunxiao Ke Chunlan |
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| Abstract: | A new technology of preparing nano - sized alumina by recovering aluminium in aluminium ash was introduced.Aluminium sulfate solution could be got by using sulfuric acid to leach aluminium ash produced in electrolytic aluminum industry.Influence of every factor on leaching process was investigated and optimum conditions were obtained.Precipitate of ammonium aluminum carbonate hydroxide(AACH) was produced in the reaction of aluminium sulfate and ammonium bicarbonate.Alumina was finally received by filtration,lavation,and calcination from AACH precipitate.Influences of factors,such as style and quantity of dispersing agent and concentration of ammonium sulfate on particle size of alumina,were investigated and optimum conditions were obtained.XRD and SEM results showed that the product was α-Al2O3 with particle size of about 70 nm. |
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| Keywords: | aluminium ash preparing nano - sized alumina ammonium bicarbonate ammonium aluminum carbonate hydroxide |
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