李婷,辛志峰,徐梦,白林山,董永平,储向峰
LI Ting,XIN Zhifeng,XU Meng,BAI Linshan,DONG Yongping,CHU Xiangfeng

• 1:安徽工业大学化学与化工学院

摘要(Abstract)：

为了从高铝粉煤灰中提取含量可控的氧化镓和氧化铝的混合物,利用氢氧化镓与氢氧化铝在碱性溶液中析出的酸度不同,采用两段碳酸化的方法,分离出一定量的氧化铝,得到氧化镓和氧化铝的混合物。探讨了第一次碳酸化条件(即不同p H、不同流量、不同温度)对氧化铝和氧化镓分离效果的影响。实验结果表明:p H值为11.23,温度为80℃,CO_2流量为40 m L/min时,最终得到的氧化镓和氧化铝的混合物中,镓的含量为5.7550 mg/g。
In order to extract mixture of alumina and gallium oxide from high-aluminum fly ash,the separation of alumina and gallium oxide with two-stage carbonization method was studied according to the difference of acidity between gallium hydroxide and aluminum hydroxide precipitation in alkaline solution. A certain amount of alumina was isolated. Taking the first-stage carbonization process as research object,the influence of p H,flow rate and temperature on the separation of alumina and gallium oxide. The results showed that,when the p H was 11. 23,the temperature was 80 ℃,the flow rate of CO_2 was 40 m L / min. The content of Ga in the mixture could reach 5. 7550 mg / g.

关键词(KeyWords)： 粉煤灰;两段碳酸化;分离;氧化铝;氧化镓
fly ash;two-stage carbonization;separation;alumina;gallium oxide

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金煤炭联合基金资助项目(U1361123)

作者(Author): 李婷,辛志峰,徐梦,白林山,董永平,储向峰
LI Ting,XIN Zhifeng,XU Meng,BAI Linshan,DONG Yongping,CHU Xiangfeng

DOI: 10.13226/j.issn.1006-6772.2016.01.021

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