Effect of Ethylene Glycol on Energy Efficiency for Zinc Production.
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- AKIYAMA Tetsuya
- Faculty of Engineering, Kyushu University
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- FUKUSHIMA Hisaaki
- Faculty of Engineering, Kyushu University
Bibliographic Information
- Other Title
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- 亜鉛電解採取のエネルギー効率に及ぼすエチレングリコールの影響
Description
Zinc was electrodeposited from synthetic sulfuric acid electrolyte containing ethylene glycol on the aluminum cathode using the insoluble Pb-0.7%Ag anode, and the effect of ethylene glycol on the several factors affecting the energy efficiency for the electrowinning was studied from the standpoint of energy savings in the hydrometallurgical production of Zn. Ethylene glycol added in the concentration from 0 to 0.2mol/l reduced the overall cell voltage by 50mV at the highest, which was resulted from the depolarization of oxygen evolution at the anode. Surface film, formed on the anode and composed of lead dioxide, became more compact and more smooth when the concentration of ethylene glycol increased in the electrolyte.<BR>Ethylene glycol, on the other hand, shifted the cathode potential to less noble direction to reduce the current efficiency for Zn deposition. However, the same phenomenon was observed by adding glue which was usually used to suppress the cathodic depolarization caused by some impurities in the industrial electrowinning of Zn. Therefore, the improvement of energy efficiency can be expected when an amount of glue to be added is partly replaced with ethylene glycol in the electrowinning of Zn.
Journal
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- Shigen-to-Sozai
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Shigen-to-Sozai 107 (11), 827-831, 1991
The Mining and Materials Processing Institute of Japan
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Details 詳細情報について
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- CRID
- 1390282680994090112
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- NII Article ID
- 130004285564
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- ISSN
- 18806244
- 09161740
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed
