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| Combined Disposal of Arsenic-Antimony Dust and Smelting Waste Acid |
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Received:August 16, 2023
Revised:August 22, 2023
Accepted:August 28, 2023
Published Online:November 30, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2024.01.016 |
| KeyWord:arsenic-antimony dust; acid leaching; reduction; metallic arsenic; waste acid; combined process |
| Author | Institution |
| ZHONG Shanbing |
江西理工大学绿色冶金与过程强化研究所 |
| SUN Baoting |
江西理工大学绿色冶金与过程强化研究所 |
| CHEN Yongqiang |
北京科技大学冶金与生态工程学院 |
| YANG Yudong |
江西理工大学绿色冶金与过程强化研究所 |
| ZHANG Zhongtang |
江西理工大学绿色冶金与过程强化研究所 |
| MA Baozhong |
北京科技大学冶金与生态工程学院 |
| LI Yuhu |
江西理工大学绿色冶金与过程强化研究所 |
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| Abstract: |
| Based on the dissolution difference of arsenic and antimony in acid solution, combined with the composition characteristics of arsenic-antimony dust and smelting waste acid, a combined disposal process of arsenic-antimony dust and smelting waste acid was proposed, which is arsenic separation by oxidizing acid leaching and arsenic fixation by hydro-reduction. The experimental results show that the leaching rate of arsenic can reach 99% above under the conditions including hydrogen peroxide feeding coefficient of 1, hydrogen peroxide mass fraction of 30%, liquid-solid ratio of 5, leaching temperature of 30 ℃, leaching time of 4 h, and waste acid acidity of 1 mol/L, and antimony content in the leaching residue is up to 90%, while the arsenic content is only 0.2%. Thus, the preliminary separation of arsenic and antimony in high-arsenic and antimony dust is realized. Using stannous chloride two-stage reduction process, and under the conditions of acidity of 12 mol/L, temperature of 90 ℃, mole ratio of n(NaCl)/n(As)=3, reductant coefficient of 1 and reaction time of 4 h, the reduction rate of arsenic can reach 99.75%, the concentration of antimony in the reaction solution is 6.72 g/L and the concentration of arsenic is only 0.17 g/L. The secondary separation of arsenic and antimony is realized. |
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