Development of eco-cemented paste backfill by reutilizing multi-source industrial solid waste: Properties, hydration processes, and environmental impacts

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-06-16 DOI:10.1016/j.powtec.2025.121276

Xia Yin , Kai Li , Liping Ma , Sancheng Qing , Wang Du , Binbin He , Kai Huang , Jie Yang , Quxiu Dai

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引用次数: 0

Abstract

Cemented paste backfill technology plays a vital role in enhancing mining safety and promoting environmental protection. However, the use of Portland cement as a binder increases carbon emissions and limits the broader application of this technology. Thus, in this study, an eco-cemented paste backfill (ECPB) characterized by a low-carbon footprint and cost-effectiveness, using 100 % solid waste, was developed. The feasibility of ECPB was investigated by analyzing performance changes, hydration processes, and environmental impacts. The results showed that the yellow phosphorus slag (YPS) activated by carbide slag (CS) served as a superior binder owing to its positive effects on the workability and mechanical properties of ECPB. Substances in phosphogypsum (PG), such as F⁻, negatively affected the ECPB hydration. However, the addition of YPS and CS improved hydration and pollutant immobilization. The pollutants in ECPB samples were immobilized through neutralization, precipitation, adsorption, and encapsulation. The hydrolysis of CS facilitated the activation of YPS and the immobilization of pollutants, whereas CS-activated YPS facilitated hydration and further pollutant stabilization. Therefore, the PG-YPS-CS-based ECPB offers great potential for improving the sustainability of mining and environmental protection.

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利用多源工业固体废物开发生态胶结膏体充填体：性能、水化过程和环境影响

胶结膏体充填技术对提高矿山开采安全、促进环境保护具有重要作用。然而，使用波特兰水泥作为粘结剂增加了碳排放，限制了该技术的广泛应用。因此，在本研究中，开发了一种生态胶结膏体回填体（ECPB），其特点是低碳足迹和成本效益，使用100%的固体废物。通过分析ECPB的性能变化、水化过程和环境影响，探讨了ECPB的可行性。结果表明，电石渣活化的黄磷渣（YPS）对ECPB的可加工性和力学性能有积极的影响，是一种较好的粘结剂。磷石膏（PG）中的物质，如F−，对ECPB水化有负面影响。然而，YPS和CS的加入改善了水化和污染物的固定化。ECPB样品中的污染物通过中和、沉淀、吸附和包封等过程进行固定化。CS的水解促进了YPS的活化和污染物的固定化，而CS活化的YPS则促进了水化和进一步的污染物稳定。因此，基于pg - yps - cs的ECPB在提高采矿可持续性和环境保护方面具有很大的潜力。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.