Experimental and modeling study of flash calcination of kaolinite rich clay particles in a gas suspension calciner

Abraham Teklay Gebremariam, Chungen Yin, Lasse Rosendahl, Lea Lindequist Køhler

Research output: Contribution to journalJournal articleResearchpeer-review

17 Citations (Scopus)

Abstract

Calcination of kaolinite particles under appropriate conditions to produce materials that can replace part of the CO2 intensive clinker is gaining an increasing interest in cement industry worldwide. This paper presents a study of flash calcination of kaolinite rich clay particles in a pilot scale gas suspension calciner, with the aim to derive useful guidelines on smart calcination for obtaining products of the best pozzolanic properties. Calcination tests are performed in the calciner under six different operation conditions. The raw feed and the calcined clay samples are all characterized experimentally and a mathematical model is also developed to predict the conversion of the clay particles. The model properly accounts for the particle–ambient flow interaction and numerically solves all the processes occurring within the clay particles. The model predictions are compared against the experimental results. A good agreement is achieved. Finally, a model-based sensitivity analysis is conducted.
Original languageEnglish
JournalApplied Clay Science
Volume103
Pages (from-to)10-19
Number of pages10
ISSN0169-1317
DOIs
Publication statusPublished - Jan 2015

Fingerprint

Kaolin
Calcination
kaolinite
Suspensions
Gases
clay
gas
modeling
Flow interactions
Cement industry
Sensitivity analysis
sensitivity analysis
Mathematical models
particle
prediction

Keywords

  • Kaolinite
  • Flash calcination
  • Metakaolinite
  • Supplementary cementitious materials
  • Pozzolanic property

Cite this

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title = "Experimental and modeling study of flash calcination of kaolinite rich clay particles in a gas suspension calciner",
abstract = "Calcination of kaolinite particles under appropriate conditions to produce materials that can replace part of the CO2 intensive clinker is gaining an increasing interest in cement industry worldwide. This paper presents a study of flash calcination of kaolinite rich clay particles in a pilot scale gas suspension calciner, with the aim to derive useful guidelines on smart calcination for obtaining products of the best pozzolanic properties. Calcination tests are performed in the calciner under six different operation conditions. The raw feed and the calcined clay samples are all characterized experimentally and a mathematical model is also developed to predict the conversion of the clay particles. The model properly accounts for the particle–ambient flow interaction and numerically solves all the processes occurring within the clay particles. The model predictions are compared against the experimental results. A good agreement is achieved. Finally, a model-based sensitivity analysis is conducted.",
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Experimental and modeling study of flash calcination of kaolinite rich clay particles in a gas suspension calciner. / Gebremariam, Abraham Teklay; Yin, Chungen; Rosendahl, Lasse; Køhler, Lea Lindequist.

In: Applied Clay Science, Vol. 103, 01.2015, p. 10-19.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Experimental and modeling study of flash calcination of kaolinite rich clay particles in a gas suspension calciner

AU - Gebremariam, Abraham Teklay

AU - Yin, Chungen

AU - Rosendahl, Lasse

AU - Køhler, Lea Lindequist

PY - 2015/1

Y1 - 2015/1

N2 - Calcination of kaolinite particles under appropriate conditions to produce materials that can replace part of the CO2 intensive clinker is gaining an increasing interest in cement industry worldwide. This paper presents a study of flash calcination of kaolinite rich clay particles in a pilot scale gas suspension calciner, with the aim to derive useful guidelines on smart calcination for obtaining products of the best pozzolanic properties. Calcination tests are performed in the calciner under six different operation conditions. The raw feed and the calcined clay samples are all characterized experimentally and a mathematical model is also developed to predict the conversion of the clay particles. The model properly accounts for the particle–ambient flow interaction and numerically solves all the processes occurring within the clay particles. The model predictions are compared against the experimental results. A good agreement is achieved. Finally, a model-based sensitivity analysis is conducted.

AB - Calcination of kaolinite particles under appropriate conditions to produce materials that can replace part of the CO2 intensive clinker is gaining an increasing interest in cement industry worldwide. This paper presents a study of flash calcination of kaolinite rich clay particles in a pilot scale gas suspension calciner, with the aim to derive useful guidelines on smart calcination for obtaining products of the best pozzolanic properties. Calcination tests are performed in the calciner under six different operation conditions. The raw feed and the calcined clay samples are all characterized experimentally and a mathematical model is also developed to predict the conversion of the clay particles. The model properly accounts for the particle–ambient flow interaction and numerically solves all the processes occurring within the clay particles. The model predictions are compared against the experimental results. A good agreement is achieved. Finally, a model-based sensitivity analysis is conducted.

KW - Kaolinite

KW - Flash calcination

KW - Metakaolinite

KW - Supplementary cementitious materials

KW - Pozzolanic property

U2 - 10.1016/j.clay.2014.11.003

DO - 10.1016/j.clay.2014.11.003

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SP - 10

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JO - Applied Clay Science

JF - Applied Clay Science

SN - 0169-1317

ER -