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

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

Guatame-Garcia, Adriana (TU Delft Resource Engineering)
Buxton, M.W.N. (TU Delft Resource Engineering)
Deon, F. (TU Delft Resource Engineering)
Lievens, Caroline (University of Twente)
Hecker, Chris (University of Twente)

2018-02-23

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.

kaolinite
metakaolinite
gamma-alumina
calcined kaolin
SWIR-MWIR-LWIR spectroscopy
Process control

http://resolver.tudelft.nl/uuid:8d3f5b68-ee79-4dd4-bc38-8a9a0e0ee3e0

https://doi.org/10.1080/08827508.2018.1459617

0882-7508

Mineral Processing and Extractive Metallurgy Review, 39 (6)

Institutional Repository

journal article

© 2018 Adriana Guatame-Garcia, M.W.N. Buxton, F. Deon, Caroline Lievens, Chris Hecker