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碳酸钠焙烧活化—硫酸浸出提取煤矸石中氧化铝的研究

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武丹宇, 庄故章, 刘梅, 何海洋. 碳酸钠焙烧活化—硫酸浸出提取煤矸石中氧化铝的研究[J]. 矿产保护与利用, 2023, 43(6): 27-32. doi: 10.13779/j.cnki.issn1001-0076.2023.06.003
引用本文: 武丹宇, 庄故章, 刘梅, 何海洋. 碳酸钠焙烧活化—硫酸浸出提取煤矸石中氧化铝的研究[J]. 矿产保护与利用, 2023, 43(6): 27-32. doi: 10.13779/j.cnki.issn1001-0076.2023.06.003
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WU Danyu, ZHUANG Guzhang, LIU Mei, HE Haiyang. Study on Al2O3 Leaching by H2SO4 after Na2CO3 Roasting Activation of Coal Gangue[J]. Conservation and Utilization of Mineral Resources, 2023, 43(6): 27-32. doi: 10.13779/j.cnki.issn1001-0076.2023.06.003
Citation: WU Danyu, ZHUANG Guzhang, LIU Mei, HE Haiyang. Study on Al2O3 Leaching by H2SO4 after Na2CO3 Roasting Activation of Coal Gangue[J]. Conservation and Utilization of Mineral Resources, 2023, 43(6): 27-32. doi: 10.13779/j.cnki.issn1001-0076.2023.06.003
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碳酸钠焙烧活化—硫酸浸出提取煤矸石中氧化铝的研究

  • 昆明理工大学，云南昆明 650032

详细信息
    作者简介: 武丹宇（1994—），男，云南曲靖市人，硕士研究生，主要研究方向为资源综合利用，E-mail：122811582@qq.com
    通讯作者: 庄故章（1967—），男，云南昭通人，副教授，主要研究方向为资源综合利用，E-mail： 2088324343@qq.com。

  • 中图分类号: TD849

Study on Al2O3 Leaching by H2SO4 after Na2CO3 Roasting Activation of Coal Gangue

  • Kunming University of Science and Technology, Kunming 650032, China

More Information

    摘要

  • 以云南曲靖地区高铁煤矸石为对象，采用碳酸钠焙烧活化—硫酸浸出法进行氧化铝提取研究，探究了不同参数对H2SO4浸出Al2O3的影响。研究结果表明，在焙烧温度为800 ℃、焙烧时间为1 h、Na2CO3用量为25%、H2SO4质量浓度为98%、H2SO4用量为25%、酸浸时间为2 h的条件下，Al2O3的浸出率可以达到87%。添加Na2CO3焙烧活化可以有效改变煤矸石中氧化铝的晶体形态，显著提高Al2O3的浸出率。本研究可为煤矸石资源中的Al2O3开发利用提供一定的技术支持。

    Taking the coal gangue with high iron content in Qujing area of Yunnan Province as the research object, the coal gangue was roasted and activated by Na2CO3, and then Al2O3 was leached by H2SO4. The coal gangue was characterized by XRD and SEM, and the effects of different parameters on the leaching of Al2O3 by H2SO4 were investigated. The results showd that the leaching rate of Al2O3 from coal gangue was improved obviously by adding Na2CO3 during roasting. The optimum leaching rate of Al2O3 reached 87% under the following conditions of roasting temperature 800 ℃, roasting time 1 h, dosage of Na2CO3 25%, concentration of H2SO4 98%, dosage of H2SO4 25% and acid leaching time 2 h. This study provides theoretical guidance for leaching Al2O3 from coal gangue and technical support for the development and utilization of coal gangue resources.

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  • 图 1  煤矸石原料XRD光谱分析

    Figure 1. 

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    图 2  煤矸石原料SEM分析

    Figure 2. 

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    图 3  焙烧温度对Al2O3浸出的影响

    Figure 3. 

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    图 4  焙烧时间对Al2O3浸出的影响

    Figure 4. 

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    图 5  Na2CO3用量对Al2O3浸出的影响

    Figure 5. 

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    图 6  硫酸浓度对Al2O3浸出的影响

    Figure 6. 

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    图 7  硫酸用量对Al2O3浸出的影响

    Figure 7. 

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    图 8  酸浸时间对Al2O3浸出的影响

    Figure 8. 

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    表 1  煤矸石主要成分分析结果

    Table 1.  Analysis results of main components of coal gangue /%

    成分SiO2Al2O3Fe2O3TiO2CaOMgOLOI
    煤矸石28.7223.0316.145.020.900.7819.32
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收稿日期:  2023-11-06
刊出日期:  2023-12-25

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