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Simulating minerals pyroprocessing by thermal analysis

Clinkerisation of cement raw mixes

  • Cements, Glasses, Ceramics
  • Published:
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Abstract

TG and DTA studies on laboratory cement raw mixes and raw dolomite have been extensively reported in the literature. This paper discusses four aspects. (1) Calcination kinetics of raw mix by isothermal TG and calculation of rate constants to derive activation energy by Arrhenius plots. (2) Quantification by TG of minerals in Indian laterites. The amount of goethite appears to influence burnability of raw mix. (3) Determination of practical heat of clinker formation from DTA studies and establishment of enthalpy temperature relationship of raw mix for heat transfer studies in rotary kilns. (4) Prediction of material temperature profile in a dolomite kiln from DTA studies of raw dolomite.

Zusammenfassung

TG-und DTA-Untersuchungen an Zementrohmischungen und Rohdolomit wurden in der Literatur intensiv beschrieben. In dieser Arbeit werden vier Aspekte diskutiert: (1) Die Kalzinationskinetik von Rohgemischen mittels isothermer TG und der Berechnung der Geschwindigkeitskonstante, um in Arrheniusschen Diagrammen die Aktivierungsenergie zu erhalten. (2) Mittels TG die Quantifizierung von Mineralen in Lateriten aus Indien. Goethit scheint die Brennbarkeit von Laterit-Rohmaterial zu beeinflussen. (3) Bestimmung der Klinkerbildungs-wärme aus DTA-Untersuchungen und Feststellung der Enthalpie/Temperatur Beziehung von Rohgemisch für Wärmetransportuntersuchungen an Drehbrennöfen. (4) Vorhersage des Temperaturprofiles des Materiales in einem Dolomitbrennofen anhand von DTA-Untersuchungen an Rohdolomit.

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References

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  1. 17, Pushparag, Goshala Road, 400 080, Mulund (West) Bombay, India

    A. Bhattacharya

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  1. A. Bhattacharya
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Bhattacharya, A. Simulating minerals pyroprocessing by thermal analysis. Journal of Thermal Analysis 40, 141–149 (1993). https://doi.org/10.1007/BF02546564

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  • DOI: https://doi.org/10.1007/BF02546564

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