Research on the Whitening Mechanism of Kaolin by Chemical Bleaching and Calcining

C.H. Lu; M. Fang; H.X. Lai; L.Q. Huang; J. Chen; C.L. Fu; J.T. Li; X.T. Luo

doi:10.4028/www.scientific.net/AMM.420.254

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 420Research on the Whitening Mechanism of Kaolin by...

Research on the Whitening Mechanism of Kaolin by Chemical Bleaching and Calcining

Abstract:

Bleaching and calcining are the major whitening process in kaolin industry. However, the whitening mechanism has not been clarified yet. In this paper, the whitening mechanism of kaolin was investigated. Kaolin was bleached with hydrosulfite and calcined under different temperature separately, the whiteness and microstructure were detected throughly by X-ray diffraction and scanning electron microscope. The soluble and insoluble Fe content were determined by phenanthroline spectrophotometry. Effect of chemical bleaching, calcined temperature on mineral characteristics and whiteness was discussed. The mechanism of whitening was analyzed systematically.

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Periodical:

Applied Mechanics and Materials (Volume 420)

Pages:

254-258

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.420.254

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Online since:

September 2013

Authors:

C.H. Lu, M. Fang, H.X. Lai, L.Q. Huang, J. Chen, C.L. Fu, J.T. Li, X.T. Luo

Keywords:

Bleach, Calcine, Kaolin, Whitening Mechanism

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