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Reduction of clinkerization temperature by using phosphogypsum.

L Kacimi1, A Simon-Masseron, A Ghomari

  • 1Laboratory of Processes Engineering, Faculty of Sciences, Department of Chemistry, University of Sciences and Technology of Oran, B.P. 1505, El M'nouar, Oran, Algeria. kacimi20002000@yahoo.fr

Journal of Hazardous Materials
|March 15, 2006
PubMed
Summary

Phosphogypsum acts as a mineralizer, significantly reducing Portland cement clinker production temperatures. This process enhances cement factory efficiency and improves the final cement

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Industrial Chemistry

Background:

  • Portland cement clinker production is energy-intensive, requiring high temperatures.
  • Phosphogypsum, a byproduct of fertilizer production, presents disposal challenges.

Purpose of the Study:

  • To investigate the use of phosphogypsum as a mineralizer in Portland cement clinker production.
  • To evaluate the impact of phosphogypsum on clinkerization temperature and cement properties.

Main Methods:

  • Characterization of raw mixture and synthesized clinker using X-ray fluorescence (XRF), optical microscopy, and powder X-ray diffraction (PXRD).
  • Analysis of structural and morphological properties using scanning electron microscopy (SEM) with microprobe analysis.
  • Evaluation of clinkerization efficiency at reduced temperatures.

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Main Results:

  • Addition of phosphogypsum significantly lowers the required burning temperature for clinker production (from 1470°C to 1200°C).
  • 10% phosphogypsum addition enables complete clinkerization at the lower temperature, increasing cement factory efficiency by 25%.
  • Phosphogypsum preserves the crystalline structure of silicate phases, enhancing cement's physical and mechanical properties.

Conclusions:

  • Phosphogypsum is an effective mineralizer for Portland cement clinker production.
  • Utilizing phosphogypsum reduces energy consumption, improves production efficiency, and extends furnace refractory life.
  • This valorization strategy offers environmental benefits by repurposing a waste material and enhancing cement quality.