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| Ethylenediamine as a New pH Adjuster for Electrolytic Manganese |
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Received:July 31, 2024
Revised:August 15, 2024
Accepted:August 26, 2024
Published Online:March 24, 2025
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| DOI： |
| KeyWord:electrolytic manganese; pH adjuster; ethylenediamine; current efficiency；DC power consumption |
| Author | Institution |
| ZHONG Shuiping |
Zijin College of Geology and Mining,Fuzhou University |
| CHANG Qingyao |
Zijin College of Geology and Mining,Fuzhou University |
| CHEN Junnan |
Zijin College of Geology and Mining,Fuzhou University |
| ZHANG Ruiying |
Zijin College of Geology and Mining,Fuzhou University |
| GUO Hao |
Zijin College of Geology and Mining,Fuzhou University |
| HE Shouxing |
Zijin College of Geology and Mining,Fuzhou University |
| CHI Xiaopeng |
Zijin College of Geology and Mining,Fuzhou University |
| WENG Wei |
Zijin College of Geology and Mining,Fuzhou University |
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| Abstract: |
| In the manganese electrolysis process using the (NH4)2SO4-MnSO4 system, it is necessary to maintain the pH of the electrolyte stable at 7.0 to 7.2. However, the oxygen evolution reaction at the anode leads to a continuous decrease in the pH value of the electrolyte under long-term electrolysis conditions. In production, ammonia water is commonly used to adjust the pH value of the electrolyte. However, ammonia water is volatile, resulting in a pungent ammonia odor throughout the production workshop, which affects health. Furthermore, the continuous addition of ammonia water leads to continuous accumulation and expansion of ammonia in the electrolyte, ultimately generating a large amount of ammonia nitrogen wastewater and ammonia nitrogen manganese slag. Given the similarity in chemical properties between ethylenediamine and ammonia water, and its stronger alkalinity and lower volatility, this paper explores the feasibility of using ethylenediamine to replace ammonia water as a pH adjuster in manganese electrolysis. The aim is to reduce the use of ammonia sources, improve the working environment, and explore the feasibility of a new ethylenediamine-based system for electrolytic manganese. |
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