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<p>This study presents an efficient approach for extracting bismuth from bismutite ore containing bismutite (Bi<sub>4.00</sub>C<sub>2.00</sub>O<sub>10.00</sub>: 96-900-1634) and zinnwaldite (KAl(FeLi)(Si<sub>3</sub>Al)O<sub>10</sub>F<sub>2</sub>: 00-041-1482) using an acidic chloride medium, followed by the hydrolytic separation of bismuth as Bismuth oxychloride (BiOCl). Experimental results showed that bismuth was selectively leached with high efficiency, while orthoclase remained in the residue, as verified by XRD analysis. The effects of key leaching parameters such as CaCl<sub>2</sub> concentration, temperature, and reaction time were systematically evaluated, with optimized conditions yielding a bismuth leaching efficiency of 94.90%. Sodium hydroxide (NaOH) treatment enabled the quantitative precipitation of BiOCl, with XRD confirming high phase purity (PDF No. 00-006-0249), indicating its potential as a precursor for pharmaceutical and supercapacitor applications. Feasibility assessment confirmed both the technical robustness of the process and the commercial viability of the product.</p>

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Extraction of bismuth from a Nigerian bismutite ore: an integrated selective leaching and precipitation approach

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Ayo F. Balogun,
  • Alafara A. Baba

摘要

This study presents an efficient approach for extracting bismuth from bismutite ore containing bismutite (Bi4.00C2.00O10.00: 96-900-1634) and zinnwaldite (KAl(FeLi)(Si3Al)O10F2: 00-041-1482) using an acidic chloride medium, followed by the hydrolytic separation of bismuth as Bismuth oxychloride (BiOCl). Experimental results showed that bismuth was selectively leached with high efficiency, while orthoclase remained in the residue, as verified by XRD analysis. The effects of key leaching parameters such as CaCl2 concentration, temperature, and reaction time were systematically evaluated, with optimized conditions yielding a bismuth leaching efficiency of 94.90%. Sodium hydroxide (NaOH) treatment enabled the quantitative precipitation of BiOCl, with XRD confirming high phase purity (PDF No. 00-006-0249), indicating its potential as a precursor for pharmaceutical and supercapacitor applications. Feasibility assessment confirmed both the technical robustness of the process and the commercial viability of the product.