Towards an On-line Characterisation of Kaolin Calcination Process Using Short-Wave Infrared Spectroscopy

Journal article (2018)

Authors

Adriana Guatame-Garcia Resource Engineering - CEG
M.W.N. Buxton Resource Engineering - CEG
F. Deon Resource Engineering - CEG
Caroline Lievens University of Twente
Chris Hecker University of Twente
Research Group
Resource Engineering (CEG) (TU Delft)
Copyright: © 2018 Adriana Guatame-Garcia, M.W.N. Buxton, F. Deon, Caroline Lievens, Chris Hecker
DOI
help_outline
https://doi.org/10.1080/08827508.2018.1459617
Kaolinite Process control Calcined kaolin SWIR-MWIR-LWIR spectroscopy metakaolinite gamma-alumina
More Info
expand_more

Published Date

02-05-2018

Language

English

Faculty

Civil Engineering & Geosciences

Department

Geoscience and Engineering

Research Group

Resource Engineering

Abstract

In the production of calcined kaolin, the on-line monitoring of the calcination reaction is becoming more relevant for the generation of optimal products. In this context, this study aimed to assess the suitability of using infrared (IR) spectroscopy as a potential technique for the on-line characterization of the
calcination of kaolin. The transformation of kaolin samples calcined at different temperatures were characterized in the short-wave (SWIR) spectra using the kaolinite crystallinity (Kx) index and the depth of the water spectral feature (1900D). A high correlation between the standard operational procedure
for the quality control of calcined kaolin and the Kx index was observed (r = -0.89), as well as with the 1900D parameter (r = -0.96). This study offers a new conceptual approach to the use of SWIR spectroscopy for the characterization the calcination of kaolin, withdrawing the need of using extensive laboratory techniques.