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| Preparing of Calcium Aluminate for Steelmaking by Pretreatment of Secondary Aluminum Dross |
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Received:March 04, 2024
Revised:March 22, 2024
Accepted:March 25, 2024
Published Online:August 08, 2024
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| DOI：doi：10.3969/j.issn.1007-7545.2024.09.020 |
| KeyWord:secondary aluminum dross; high alumina material; calcium aluminate for steelmaking |
| Author | Institution |
| LIU Zhongkai |
中铝郑州有色金属研究院有限公司 |
| KANG Zeshuang |
中铝郑州有色金属研究院有限公司 |
| TIAN Ye |
中铝郑州有色金属研究院有限公司 |
| CHEN Kaibin |
中铝郑州有色金属研究院有限公司 |
| HE Xinzhong |
中铝郑州有色金属研究院有限公司 |
| ZHANG Tengfei |
中铝郑州有色金属研究院有限公司 |
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| Abstract: |
| Secondary aluminum dross is a hazardous waste produced by aluminum industry, and it is also an aluminum-rich resource. Calcium aluminate for steelmaking was prepared by mixing, ball milling, forming and sintering with wet pretreated secondary aluminum ash and limestone as raw materials. The optimum preparation process conditions for calcium aluminate include mass ratio of high alumina material to limestone of 0.5, sintering temperature of 1 350 ℃, and forming pressure of 10 MPa. The Al2O3 and CaO contents of the prepared calcium aluminate sample meet the composition requirements of the CA-40 grade in "Pre-melted Calcium-aluminate for Steelmaking" (YB/T 4265—2011), and the main phase is 12CaO?7Al2O3. It has the properties of low silicon, low magnesium, low iron oxide, low phosphorus, low sulfur, low fluorine, and low carbon, and the melting point is 1 378 ℃, which meets the quality standards of pre-melted calcium aluminate products for steelmaking. |
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