Synergistic use of electrolytic manganese residue and barium slag to prepare belite- sulphoaluminate cement study

He, Weilong; Li, Rui; Yu, Zhishui; Nie, Dengpan

doi:10.1016/j.conbuildmat.2022.126672

Cited by 38 publications

(7 citation statements)

References 41 publications

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“…This formula can reduce the dosage of cement. He et al [ 19 ] used electrolytic manganese slag and barium slag to prepare tourmaline-sulphoaluminate cement. Wang et al [ 20 ] verified a new method of mine deep cooling based on PCM backfill by numerical simulation and experiment.…”

Section: Introductionmentioning

confidence: 99%

Study on triaxial compression performance and damage characteristics of fiber-reinforced ecological matrix cementing gangue gypsum fill material

Jiang,

Yin,

Yin

et al. 2024

PLoS ONE

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Polypropylene fiber was equally mixed into alkali-activated slag fly ash geopolymer in order to ensure the filling effect of mine goaf and improve the stability of cemented gangue paste filling material with ecological matrix. Triaxial compression tests were then conducted under various conditions. The mechanical properties and damage characteristics of composite paste filling materials are studied, and the damage evolution model of paste filling materials under triaxial compression is established, based on the deviatoric stress-strain curve generated by the progressive failure behavior of samples. Internal physical and chemical mechanisms of the evolution of structure and characteristics are elucidated and comprehended via the use of SEM-EDS and XRD micro-techniques. The results show that the fiber can effectively improve the ultimate strength and the corresponding effective stress strength index of the sample within the scope of the experimental study. The best strengthening effect is achieved when the amount of NaOH is 3% of the mass of the solid material, the amount of fiber is 5‰ of the mass of the solid material, and the length of the fiber is about 12 mm. The action mode of the fiber in the sample is mainly divided into single-grip anchoring and three-dimensional mesh traction. As the crack initiates and develops, connection occurs in the matrix, where the fiber has an obvious interference and retardation effect on the crack propagation, thereby transforming the brittle failure into a ductile failure and consequently improving the fracture properties of the ecological cementitious coal gangue matrix. The theoretical damage evolution model of a segmented filling body is constructed by taking the initial compaction stage end point as the critical point, and the curve of the damage evolution model of the specimen under different conditions is obtained. The theoretical model is verified by the results from the triaxial compression test. We concluded that the experimental curve is in good agreement with the theoretical curve. Therefore, the established theoretical model has a certain reference value for the analysis and evaluation of the mechanical properties of paste filling materials. The research results can improve the utilization rate of solid waste resources.

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Section: Introductionmentioning

confidence: 99%

Study on triaxial compression performance and damage characteristics of fiber-reinforced ecological matrix cementing gangue gypsum fill material

Jiang,

Yin,

Yin

et al. 2024

PLoS ONE

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“…For example, the accumulation of manganese (Mn) tailings and electrolytic Mn slag have generated environmental and human health problems, even resulting in central nervous system disease unless obtained appropriate treatment after exposure (Wang et al, 2018;Zhang et al, 2021). Cement rotary kiln co-processing of SW is a widely accepted sustainable and economic technique used to dispose of the Mn contained in SW (He et al, 2021;Gong et al, 2022;He et al, 2022;Vaiciene and Simanavicius, 2022). Due to its high calcination temperature and long residence time, the technique is commonly used to fix trace nonvolatile harmful ingredients (Zhao et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Incorporation and solidification mechanism of manganese doped cement clinker

Yang

Liu

et al. 2023

Front. Chem.

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Using municipal and industrial solid waste as a substitute raw material and fuel in cement rotary kiln co-processing is considered an economic and environmentally friendly alternative to the use of traditional fuels. However, the presence of heavy metals in solid waste is a growing concern in the cement rotary kiln co-processing technique. The solidification mechanism of heavy metals in cement clinker is directly related to their stabilization. Cement clinkers doped with manganese oxide (MnO2: 0.0%–5.0% wt%) were prepared in a laboratory to investigate the impacts of extrinsic Mn on cement clinker calcination. The insignificant changes in X-ray diffractometer patterns indicated that the fixed Mn had little influence on the mineral lattice structure. Raman spectra and X-ray photoelectron spectroscopy revealed the transformation of the silicate phase when the Mn dose was increased. Moreover, the satisfactory solidification ratio confirmed the incorporation of Mn in the cement clinker. These results provided evidence of the influence rule of Mn in the cement clinker calcination process. Furthermore, Raman spectroscopy showed great potential for the qualitative and semi-quantitative analysis of the cementitious materials derived from cement rotary kiln co-processing. These results will be important for the further development of green cement manufacturing technology.

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“…EMR is currently disposed of mainly through direct landfills, whose primary purpose is to prevent Mn 2+ , NH 4 + -N, and heavy metals from entering the environment. − Resource utilization is necessary to solve the pollution problems of EMR. There are still problems in the current EMR resource utilization process, such as the difficulty of completely removing Mn 2+ and NH 4 + -N, heavy metal pollution, low added-value products, low dosing of EMR, and secondary pollution of NH 4 + -N. − Due to changes in the fundamental physical properties of the EMR during the stockpiling process, Mn 2+ and NH 4 + -N are difficult to remove because of the formation of insoluble complex salts during the storage of EMR. However, no fundamental studies on the migration and transformation behaviors of Mn 2+ and NH 4 + -N during EMR storage have been reported in China and abroad.…”

Section: Introductionmentioning

confidence: 99%

Migration and Transformation Behavior of Mn²⁺ and NH₄⁺-N in Electrolytic Manganese Residue at Different Leaching pH Environments: Release Kinetic Model, Physical Phase Changes, and Formation of Manganese Oxide

et al. 2023

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Mn 2+ , NH 4 + -N, and heavy metals in electrolytic manganese residue (EMR) have severely polluted the environment. This study investigated the migration and transformation behaviors of Mn 2+ and NH 4 + -N in EMR at different leaching environments. The results showed that the release of Mn 2+ and NH 4 + -N was a secondary kinetic process. Physical phase analysis indicated that Mn 2+ and NH 4 + -N lost in leaching were mainly derived from (NH 4 ) 2 Mg(SO 4 ) 2 •6H 2 O, (NH 4 ) 2 SO 4 , and MnSO 4 • H 2 O from EMR, and Mn lost from EMR during leaching was mainly exchangeable and in a soluble state, followed by a carbonate bond state. NH 4 + -N was specifically retained in EMR by electrostatic and ion exchange interactions, and a part of NH 4 + -N in EMR can be converted to NO 3 − -N on the surface of manganese oxide formed during the alkaline leaching environment. The accumulated maximum release of Mn 2+ and NH 4 + -N under an alkaline leaching environment was significantly reduced compared to an acidic environment, since Mn 2+ mainly reacted with OH − to generate Mn(OH) 2 , MnOOH, and MnO 2 . In addition, releasing of heavy metal ions from EMR was a continual process. This study provides theoretical support for the harmless treatment and resource utilization of EMR.

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Synergistic use of electrolytic manganese residue and barium slag to prepare belite- sulphoaluminate cement study

Cited by 38 publications

References 41 publications

Study on triaxial compression performance and damage characteristics of fiber-reinforced ecological matrix cementing gangue gypsum fill material

Study on triaxial compression performance and damage characteristics of fiber-reinforced ecological matrix cementing gangue gypsum fill material

Incorporation and solidification mechanism of manganese doped cement clinker

Migration and Transformation Behavior of Mn²⁺ and NH₄⁺-N in Electrolytic Manganese Residue at Different Leaching pH Environments: Release Kinetic Model, Physical Phase Changes, and Formation of Manganese Oxide

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Synergistic use of electrolytic manganese residue and barium slag to prepare belite- sulphoaluminate cement study

Cited by 38 publications

References 41 publications

Study on triaxial compression performance and damage characteristics of fiber-reinforced ecological matrix cementing gangue gypsum fill material

Study on triaxial compression performance and damage characteristics of fiber-reinforced ecological matrix cementing gangue gypsum fill material

Incorporation and solidification mechanism of manganese doped cement clinker

Migration and Transformation Behavior of Mn2+ and NH4+-N in Electrolytic Manganese Residue at Different Leaching pH Environments: Release Kinetic Model, Physical Phase Changes, and Formation of Manganese Oxide

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Migration and Transformation Behavior of Mn²⁺ and NH₄⁺-N in Electrolytic Manganese Residue at Different Leaching pH Environments: Release Kinetic Model, Physical Phase Changes, and Formation of Manganese Oxide