NDLI: New method of analyzing bauxites to determine their main components and impurities

Content Provider	Springer Nature Link
Author	Nechitailov, A. P. Suss, A. G. Zhilina, T. I. Belava, E. A.
Copyright Year	2008
Abstract	This article examines the important problem of finding new, faster, and more efficient methods of analyzing the composition of natural raw materials, especially bauxites – the most important raw material used in the production of alumina. The authors have developed a new method of determining the silica content of bauxites and have used it as a foundation for a new system for analyzing the natural raw materials for their contents of the main components – Al$_{2}$O$_{3}$, SiO$_{2}$, Fe$_{2}$O$_{3}$, TiO$_{2}$, and CNL. The gravimetric method described by GOST 14657.2-96 (ISO 6607-85) to analyze bauxites is laborious and time-consuming. It is based on the precipitation of silicic acid from a hydrochloric acid solution after the bauxite has been decomposed by some method and the subsequent determination of silica from the difference in mass before and after treatment with hydrofluoric acid. The new method is based on the ability of silicon to form volatile silicon tetrafluoride, and the key step is distilling silicon in the bauxite off in the form of SiF$_{4}$ without the ore’s preliminary decomposition. The new method costs less than the existing approach, consumes a minimum of reagents, and requires fewer operations than the gravimetric method. The last consideration significantly lessens the effect of the human factor on the results of the analysis, which are at least as accurate as stipulated by the GOST standard.
Starting Page	625
Ending Page	632
Page Count	8
File Format	PDF
ISSN	00260894
Journal	Metallurgist
Volume Number	52
Issue Number	11-12
e-ISSN	15738892
Language	English
Publisher	Springer US
Publisher Date	2009-04-16
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	bauxite silica main components impurities analytical system new method Characterization and Evaluation of Materials Materials Science Metallic Materials
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Condensed Matter Physics

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Study of the viscosity of untreated pulp containing Dian-Dian bauxite from Guinea under different regimes

Development of equipment for thickening bauxite pulp under pressure

Effect of process parameters on the grindability and Bond index of bauxites and alumina-bearing ores

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