| 电炉镍铁渣重金属浸出研究 |
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| 引用本文： | 苏青,谢红波,陈哲,麦俊明,吴春丽.电炉镍铁渣重金属浸出研究[J].硅酸盐通报,2021,40(4):1312-1317. |
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| 作者姓名： | 苏青 谢红波 陈哲 麦俊明 吴春丽 |
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| 作者单位： | 广东省建筑材料研究院,广州 510000 |
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| 基金项目： | 广州市珠江科技新星专项(201806010084);广州市科技计划项目(202002030125) |
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| 摘 要： | 通过分析电炉镍铁渣的矿物成分和物相组成,考察不同粒度电炉镍铁渣的重金属含量,采用BCR(Bureau Community of Reference)连续提取方法和调节浸提剂pH值进行电炉镍铁渣的浸出测试。结果表明:粉末状电炉镍铁渣的重金属含量最高,完整电炉镍铁渣的重金属含量小于破损的重金属含量;电炉镍铁渣属于一般工业废物,不属于危险废弃物;水溶态中重金属Cd更容易浸出,重金属Cu、Ni在弱酸环境下更容易浸出,在可还原状态下重金属Cr、Pb和Mn更容易浸出,在可氧化态下Zn和Cu更容易浸出;除Cu和Pb外,pH值的降低会导致电炉镍铁渣中的重金属浸出量增大,呈L型浸出曲线,Cu在碱性环境下会加速浸出,而Pb只有在强碱环境下才会大量浸出,因此在强碱环境下要注意Pb的浸出检测。
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| 关 键 词： | 镍铁渣 重金属 浸出毒性 BCR 电炉 |
| 收稿时间： | 2020-09-27 |
Research on Leaching of Heavy Metals from Nickel-Iron Slag in Electric Furnace |
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| SU Qing,XIE Hongbo,CHEN Zhe,MAI Junming,WU Chunli.Research on Leaching of Heavy Metals from Nickel-Iron Slag in Electric Furnace[J].Bulletin of the Chinese Ceramic Society,2021,40(4):1312-1317. |
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| Authors: | SU Qing XIE Hongbo CHEN Zhe MAI Junming WU Chunli |
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| Affiliation: | Guangdong Institute of Building Materials, Guangzhou 510000, China |
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| Abstract: | By analyzing the mineral composition and phase composition of electric furnace nickel-iron slag, the heavy metal content of electric furnace nickel-iron slag with different particle sizes was investigated, and the BCR (Bureau Community of Reference) continuous extraction method and adjusting the pH value of extractant were used to test the leaching of electric furnace nickel-iron slag. The results show that the powdered electric furnace nickel-iron slag has the highest heavy metal content, and the complete electric furnace nickel-iron slag has a lower heavy metal content than that of the damaged. The electric furnace nickel-iron slag is a general industrial waste, not a hazardous waste. Heavy metal Cd is more easily leached, heavy metals Cu and Ni are more easily leached in a weak acid environment, heavy metals Cr, Pb and Mn are more easily leached in a reducible state, and Zn and Cu are more easily leached in an oxidizable state. Except for Cu and Pb, the decrease of pH increases the leaching amount of heavy metals in the nickel-iron slag of electric furnace, showing an L-shaped leaching curve. Cu accelerates the leaching in an alkaline environment, while Pb only is leached in a large amount under a strong alkaline environment. Pay attention to the Pb leaching test in a strong alkaline environment. |
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| Keywords: | nickel-iron slag heavy metal leaching toxicity BCR electric furnace |
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