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Related Experiment Video

Updated: Dec 18, 2025

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
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Closed-circulating CO2 sequestration process evaluation utilizing wastes in steelmaking plant.

Huining Zhang1, Quanqin Zuo1, Chao Wei1

  • 1Faculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China.

The Science of the Total Environment
|June 13, 2020
PubMed
Summary

This study introduces a closed-circulating carbon dioxide (CO2) sequestering process for steel plant waste. The cold-rolling waste water (CRW) circulation strategy shows superior CO2 uptake efficiency and cost reduction for a greener economy.

Keywords:
CO(2) sequestrationClosed-circulatingCold-rolling waste waterMolecular simulationProcess evaluationSteelmaking slag

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Area of Science:

  • Metallurgical Engineering
  • Environmental Science
  • Chemical Engineering

Background:

  • Steel plant waste management is crucial for a green circular economy.
  • Exploring waste valorization and harmless disposal methods is significant.
  • Carbon dioxide (CO2) sequestration in industrial waste offers environmental benefits.

Purpose of the Study:

  • To propose and evaluate a closed-circulating CO2 sequestering process for steel plant waste.
  • To compare the effectiveness of slag circulation versus cold-rolling waste water (CRW) circulation strategies.
  • To analyze the kinetics, energy consumption, and cost-effectiveness of the proposed process.

Main Methods:

  • Systematic discussion of CO2 uptake efficiency, carbonation degree, and desalination rate for two circulation strategies.
  • Kinetic analysis using modeling and molecular simulation.
  • Simulation of energy consumption and cost for economic evaluation.

Main Results:

  • Peak performance for both strategies achieved with 3-5 circulation times.
  • CRW circulation strategy demonstrated higher CO2 uptake efficiency (487kgCO2/tslag) and a 48.9% desalination rate under specific conditions (5 cycles, 60°C, 20 L/g, 90 min).
  • CRW strategy doubled CO2 sequestration efficiency compared to previous methods, with significant reductions in energy consumption (129%-183%) and cost (35.6%).

Conclusions:

  • The CRW circulation strategy is superior for CO2 sequestration in steel plant waste.
  • The proposed closed-circulating process is economical and viable for industrial application.
  • Optimized circulation times (3-5 cycles) maximize process efficiency.