| 基于铅锌冶炼渣碱激发材料固化铬渣的研究 |
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| 引用本文： | 方露,黄萧. 基于铅锌冶炼渣碱激发材料固化铬渣的研究[J]. 硅酸盐通报, 2021, 40(8): 2631-2639 |
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| 作者姓名： | 方露 黄萧 |
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| 作者单位： | 重庆大学煤矿灾害动力学与控制国家重点实验室,重庆 400044;重庆大学资源与安全学院,重庆 400044 |
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| 基金项目： | 重庆市基础研究与前沿探索专项博士后科学基金项目(cstc2019jcyj-bshX0028) |
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| 摘 要： | 利用铅锌冶炼渣(LZSS)制备碱激发材料并固化铬渣(COPR)来实现废物共处理.通过单因素试验和正交试验探讨了碱含量、水玻璃模数、液固比和初始养护温度对碱激发LZSS强度的影响.基于上述试验,利用碱激发LZSS固化铬渣,并通过抗压强度和重金属浸出评价铬渣固化体的性能.结果表明:碱含量为2.5％(质量分数,下同),水玻璃...
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| 关 键 词： | 铅锌冶炼渣 铬渣 资源化利用 碱激发材料 废物共处理 |
| 收稿时间： | 2021-03-17 |
Utilization of Alkali-Activated Lead-Zinc Smelting Slag for Chromite Ore Processing Residue Solidification |
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| FANG Lu,HUANG Xiao. Utilization of Alkali-Activated Lead-Zinc Smelting Slag for Chromite Ore Processing Residue Solidification[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(8): 2631-2639 |
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| Authors: | FANG Lu HUANG Xiao |
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| Affiliation: | 1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China;2. School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China |
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| Abstract: | Lead-zinc smelting slag (LZSS) was used to prepare alkali-activated materials and solidify chromite ore processing residue (COPR) to realize waste co-treatment. Single-factor and orthogonal experiments were carried out which aim to explore the effects of various parameters (alkali content, water glass modulus, liquid-solid ratio, and initial curing temperature) for alkali-activated LZSS strength. Based on the above experiments, COPR was solidified by alkali-activated LZSS. Additionally, compressive strength and leaching toxicity were the indexes to evaluate the performance of the solidified bodies containing COPR. The results show that when the alkali content is 2.5% (mass fraction, the same below), the water glass modulus is 1.5, the liquid-to-solid ratio is 0.19, the initial curing temperature is 35 ℃, the compressive strength of alkali-activated LZSS reaches up to 84.49 MPa. With the increase of COPR content, the compressive strength of solidified bodies gradually decreases, and when 40% COPR is added, the compressive strength decreases to 1.42 MPa. However, the leaching concentrations of Zn and Cr from all the solidified bodies (the content of COPR is 0%~40%) are far below the critical limits (US EPA Method 1311 and China GB 5085.3—2007). Heavy metal ions in LZSS and COPR are immobilized successfully by chemical and physical means, which is manifested by the analyses of environmental scanning electron microscope with energy dispersive spectrometry, Fourier transform infrared spectrometry, and X-ray diffraction. The results show that alkali-activated LZSS can solidify COPR effectively. |
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| Keywords: | lead-zinc smelting slag chromite ore processing residue resource utilization alkali-activated material waste co-treatment |
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