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3. Environment. Toxicity
3.1 Environment
See
Certainly, mining, mineralurgy, extractive metallurgy and tungsten metallurgy create more or less the usual environmental problems. In some applications, the use of metal and its alloys leads to negligible and harmless dispersive losses. Disposal of used parts is not a major problem, since, as we saw in paragraph 5 of article
The...
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Environment. Toxicity
Economic data
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Bibliography
References
- (1) - WEEKS (M.-E.) - Discovery of the elements (La découverte des éléments). - Chapter 9 : Chromium, Molybdenium, Tungsten, Uranium, pp. 253-258. Chapter 10 : Contributions of the Elhuyar brothers, p. 284-310 (1960), Journal of Chemical Education, Easton, PA, USA (6th edition). Voir aussi : J. Chem. Educ. 11 (1934), pp....
Standardization
French Standards Association (AFNOR)
French standards are increasingly based on European EN and international ISO standards.
- Sieving and granulometry - Determining the mass or volume area of powders by permeabilimetry – Method by Lea and Nurse. - NF X11-601 - sept. 1979
- Determination of the mass area (specific surface) of powders by gas adsorption - B.E.T. method. – Volumetric measurement...
Organization
International Tungsten Industry Association (ITIA)
ITIA was formally inaugurated in Brussels in February 1988 and registered as a scientific association under Belgian law. Some 60 companies (mining companies, producers, consumers, trading companies) from 19 countries are members of the association. It is extremely useful in distributing and exchanging valuable information on tungsten between the various groups and...
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