酸浸法提取粉煤灰中氧化铝溶出规律的研究

Abstract

Abstract: Acid leaching is one of the main techniques to extract aluminum from coal fly ash. A method of extracting Al₂O₃ from the fly ash with different concentrations of H₂SO₄ acid as solvent and NaF as co-solvent was introduced.Experiment results showed，when the temperature reached at the boiling temperature，dosage of NaF was 0，concentration of H₂SO₄ reached 12 mol/L，and time for dissolving was 150 min，the Al₂O₃ dissolving ratio could achieved 80.19%.The process could be carried out at a low temperature and a normal pressure，so it could save the energy and decrease the cost，and had a higher practical value.

Key words: fly ash, acid leaching method, dissolution rate, alumina

CLC Number:

TQ133.1

SUN Xiu-Jun, SHU Xin-Qian. Study on alumina leaching rule from fly ash with acid dissolution[J]. INORGANICCHEMICALSINDUSTRY, 2013, 45(11): 44-.

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Inorganic Acid-Base-Salt Committee of CIESC

Study on alumina leaching rule from fly ash with acid dissolution

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