2011 Fiscal Year Final Research Report
Production Process of Zinc Metal from Electric Arc Furnace Dust
| Project/Area Number |
22656171
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Metal making engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
MATSUBAE Kazuyo 東北大学, 大学院・工学研究科, 准教授 (50374997)
HIRAKI Takehito 東北大学, 大学院・工学研究科, 助教 (60550069)
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| Project Period (FY) |
2010 – 2011
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| Keywords | 電気炉ダスト / 亜鉛 / リサイクル / Waeltz法 / 廃棄物処理 |
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| Research Abstract |
Reduction of ZnO in EAF dust after the treatment with CaO by carbon or metallic iron was conducted as an optional technology for metallic Zn recovery from the dust. The specimens were six gram mixture of the reaction product from lime addition process and carbon at ZnO/C or ZnO/Fe=1/1 in molar ratio. This mixture was heated for given period at 1000 to 1100°C in Ar flow or vacuum. After heating, the condensed matters deposited on the cooling part in the apparatus was collected and analyzed by XRD and ICP. The experimental result of ZnO reduction process using the reaction products from lime addition process showed that pure metallic Zn was successfully obtained in the present work. In the Waelz process, the product is crude ZnO containing significant amount of halogens while the CaO treated dust is basically halogen-free. It may be possible to collect liquid pure zinc by the reduction of CaO treated dust with iron if the temperature of cooling part is precisely controlled.
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