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

WU Danyu; ZHUANG Guzhang; LIU Mei; HE Haiyang

doi:10.13779/j.cnki.issn1001-0076.2023.06.003

2023 Vol. 43, No. 6

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Article navigation > Conservation and Utilization of Mineral Resources > 2023 > 43(6): 27-32

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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

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

Kunming University of Science and Technology, Kunming 650032, China

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Corresponding author: ZHUANG Guzhang, 2088324343@qq.com

Received Date: 06 November 2023

Publish Date: 25 December 2023

Abstract

Abstract

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.
- coal gangue /
- Na₂CO₃ activation /
- H₂SO₄ leaching /
- Al₂O₃leaching rate

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References

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