Hrcak
Portal of scientific journals of Croatia
Metallurgy, Vol.50 No.2 April 2011.
Preliminary communication
Montmorillonite: A comparison of methods for its determination in foundry bentonites
M. Holtzer
; AGH – University of Science and Technology, Faculty of Foundry Engineering, Krakow, Poland
A. Bobrowski
; AGH – University of Science and Technology, Faculty of Foundry Engineering, Krakow, Poland
B. Grabowska
; AGH – University of Science and Technology, Faculty of Foundry Engineering, Krakow, Poland
Fulltext: pdf (182 KB),
English,
Pages 119 - 122
,
Abstracts
A comparison and estimation of usefulness of a quantitative analysis of montmorillonite in foundry bentonites, was the aim of this research. The investigations were made by means of three different techniques: methylene blue (MB) adsorption method, Cu(II)-triethylenetetramine complex (Cu(II)-TET) adsorption method, and infrared spectroscopy (FTIR) method. Tests were performed for 9 kinds of bentonites originated from various producers. The achieved results indicated that, the results obtained by the FTIR method were, in general, even 10% lower than the ones obtained by other methods. The best correlation with the data given by the producers were obtained for the Cu(II)-TET method. In addition, this method was characterised by the smallest value of standard deviations. A very essential advantage of the Cu(II)-TET method is a much shorter time needed for the analysis and its easier execution, which is important under production conditions.
Keywords
foundry; green sands; bentonite; montmorillonite; FTIR
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