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<b>Abstract</b>— <p>The article examines the chemical and energy-technological processes occurring in phosphorites and phosphorus-containing rocks and their influence on the structure and composition during roasting. The possibility of applying existing methods for determining sintering kinetics to model the roasting of phosphorite pellets is analyzed. The results of studies of the chemical–energy–technological process of roasting phosphorite pellets with the addition of coke using thermal and structural analysis methods are presented. It is established that the main parameters influencing the interaction of coke with the pellet material are the rate of heating to firing temperatures, the concentration of coke in the pellet, and the concentration of the oxidizer in the heating gas/heat carrier. It is found that the process of sintering phosphorite pellets is preceded by significant changes in the chemical composition, structure, and properties of the original components. The intensity of these changes is determined by the temperature, composition, and pressure of the gas phase, which may be non-uniform at different points of the samples being studied.</p>

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Study of Processes of Strengthening Roasting of Phosphorite Pellets with the Addition of Coke Breeze

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • V. P. Meshalkin,
  • M. I. Dli,
  • V. I. Bobkov,
  • A. A. Bykov

摘要

Abstract—

The article examines the chemical and energy-technological processes occurring in phosphorites and phosphorus-containing rocks and their influence on the structure and composition during roasting. The possibility of applying existing methods for determining sintering kinetics to model the roasting of phosphorite pellets is analyzed. The results of studies of the chemical–energy–technological process of roasting phosphorite pellets with the addition of coke using thermal and structural analysis methods are presented. It is established that the main parameters influencing the interaction of coke with the pellet material are the rate of heating to firing temperatures, the concentration of coke in the pellet, and the concentration of the oxidizer in the heating gas/heat carrier. It is found that the process of sintering phosphorite pellets is preceded by significant changes in the chemical composition, structure, and properties of the original components. The intensity of these changes is determined by the temperature, composition, and pressure of the gas phase, which may be non-uniform at different points of the samples being studied.