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Li Y, Ni W, Gao W, Zhang S, Fu P, Li Y. Study on Solidification and Stabilization of Antimony-Containing Tailings with Metallurgical Slag-Based Binders. MATERIALS 2022; 15:ma15051780. [PMID: 35269012 PMCID: PMC8911367 DOI: 10.3390/ma15051780] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 02/20/2022] [Accepted: 02/23/2022] [Indexed: 02/01/2023]
Abstract
Blast furnace slag (BFS), steel slag (SS), and flue gas desulfurized gypsum (FGDG) were used to prepare metallurgical slag-based binder (MSB), which was afterwards mixed with high-antimony-containing mine tailings to form green mining fill samples (MBTs) for Sb solidification/stabilization (S/S). Results showed that all MBT samples met the requirement for mining backfills. In particular, the unconfined compressive strength of MBTs increased with the curing time, exceeding that of ordinary Portland cement (OPC). Moreover, MBTs exhibited the better antimony solidifying properties, and their immobilization efficiency could reach 99%, as compared to that of OPC. KSb(OH)6 was used to prepare pure MSB paste for solidifying mechanism analysis. Characteristics of metallurgical slag-based binder (MSB) solidified/stabilized antimony (Sb) were investigated via X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). According to the results, the main hydration products of MSB were C-S-H gel and ettringite. Among them, C-S-H gel had an obvious adsorption and physical sealing effect on Sb, and the incorporation of Sb would reduce the degree of C-S-H gel polymerization. Besides, ettringite was found to exert little impact on the solidification and stabilization of Sb. However, due to the complex composition of MSB, it was hard to conclude whether Sb entered the ettringite lattice.
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Affiliation(s)
- Yunyun Li
- School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; (Y.L.); (S.Z.); (P.F.); (Y.L.)
- Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 10083, China;
- Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 10083, China
| | - Wen Ni
- School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; (Y.L.); (S.Z.); (P.F.); (Y.L.)
- Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 10083, China;
- Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 10083, China
- Correspondence:
| | - Wei Gao
- Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 10083, China;
- Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 10083, China
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Siqi Zhang
- School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; (Y.L.); (S.Z.); (P.F.); (Y.L.)
- Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 10083, China;
- Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 10083, China
| | - Pingfeng Fu
- School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; (Y.L.); (S.Z.); (P.F.); (Y.L.)
- Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 10083, China;
- Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 10083, China
| | - Yue Li
- School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; (Y.L.); (S.Z.); (P.F.); (Y.L.)
- Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 10083, China;
- Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 10083, China
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