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Volume 31 Issue 7
Jul.  2024
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文章导航 >  矿物冶金与材料学报（英文）  > 2024  >  31(7): 1480-1499
Yikai Liu, Yunmin Wang, and Qiusong Chen, Using cemented paste backfill to tackle the phosphogypsum stockpile in China: A down-to-earth technology with new vitalities in pollutant retention and CO2 abatement, Int. J. Miner. Metall. Mater., 31(2024), No. 7, pp. 1480-1499. https://doi.org/10.1007/s12613-023-2799-y
Cite this article as:
Yikai Liu, Yunmin Wang, and Qiusong Chen, Using cemented paste backfill to tackle the phosphogypsum stockpile in China: A down-to-earth technology with new vitalities in pollutant retention and CO2 abatement, Int. J. Miner. Metall. Mater., 31(2024), No. 7, pp. 1480-1499. https://doi.org/10.1007/s12613-023-2799-y
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特约综述

利用矿山充填体回填解决磷石膏堆存问题：在污染物截留和二氧化碳减排方面的新见解

  • 1)

    中南大学资源与安全工程学院，长沙410083，中国

  • 2)

    Department of Geosciences and CIRCe Centre, University of Padua, Padua 35129, Italy

  • 3)

    中钢集团马鞍山矿山研究总院股份有限公司，马鞍山 24300，中国


  • 通讯作者:

    陈秋松    E-mail: qiusong.chen@csu.edu.cn

文章亮点

  • (1) 该研究回顾了磷石膏中潜在有毒元素的赋存形式，并描述了它们与堆存地区土壤与水文、人为活动和周围生物的关系。
  • (2) 通过对矿山回填技术路线的梳理，为推进磷石膏的增值回收提供了成本效益和高度可扩展性的思路，但目前仍存在与有毒元素固定能力和长期有效性有关的问题。
  • (3) 研究讨论了如何整合创新战略，包括使用辅助胶凝材料和替代胶凝材料，以及利用二氧化碳矿化和优化供应链，从而实现磷石膏治理的经济性和可持续性，以满足气候协定的目标。
  • 磷石膏作为磷肥生产的副产品，其堆存问题在全球范围内广泛存在，对生态系统功能和人类健康产生负面影响。在本研究中，我们回顾了近期的研究，并首先探讨了磷石膏中存在的多种有毒元素（如可溶性磷，氟化物，重金属以及放射性元素等）并阐述了它们的赋存形式与土壤特性、人为活动及周围生物的密切关系。然后，我们回顾了一些可以促进磷石膏可持续管理的原位或异位解决方案，其中比较值得关注的是矿山胶结回填技术，这种技术为促进磷石膏的增值回收提供了经济实惠且可扩展的途径。然而，这种技术在实施过程中面临有毒元素固定能力和充填体长期有效性的挑战。此外，由于这一传统方案将会对普通硅酸盐水泥产生大规模的需求，从而导致大量的二氧化碳被排放，如何为这一技术路线进行脱碳在近年来受到了更多的关注，以满足《巴黎协定》和中国碳中和经济的气候减缓目标。为了解决这些问题，我们回顾了一系列创新战略，包括辅助胶凝材料与替代胶凝材料的使用、二氧化碳矿化技术以及供应链优化等。这些策略的整合旨在进一步推进磷石膏治理的经济性和可持续性。然而，要实现环境、社会和经济方面的共同效益，需要进一步研究以弥合先进技术的可行性与多学科需求之间的差距。
    • Invited Review

    Using cemented paste backfill to tackle the phosphogypsum stockpile in China: A down-to-earth technology with new vitalities in pollutant retention and CO2 abatement

    + Author Affiliations
      Abstract
    • Phosphogypsum (PG), a hard-to-dissipate by-product of the phosphorus fertilizer production industry, places strain on the biogeochemical cycles and ecosystem functions of storage sites. This pervasive problem is already widespread worldwide and requires careful stewardship. In this study, we review the presence of potentially toxic elements (PTEs) in PG and describe their associations with soil properties, anthropogenic activities, and surrounding organisms. Then, we review different ex-/in-situ solutions for promoting the sustainable management of PG, with an emphasis on in-situ cemented paste backfill, which offers a cost-effective and highly scalable opportunity to advance the value-added recovery of PG. However, concerns related to the PTEs’ retention capacity and long-term effectiveness limit the implementation of this strategy. Furthermore, given that the large-scale demand for ordinary Portland cement from this conventional option has resulted in significant CO2 emissions, the technology has recently undergone additional scrutiny to meet the climate mitigation ambition of the Paris Agreement and China’s Carbon Neutrality Economy. Therefore, we discuss the ways by which we can integrate innovative strategies, including supplementary cementitious materials, alternative binder solutions, CO2 mineralization, CO2 curing, and optimization of the supply chain for the profitability and sustainability of PG remediation. However, to maximize the co-benefits in environmental, social, and economic, future research must bridge the gap between the feasibility of expanding these advanced pathways and the multidisciplinary needs.
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