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CHEMICAL GRADE [1 record]
Record 1 - internal organization data 2003-10-27
Record 1, English
Record 1, Subject field(s)
- Geochemistry
- Chromium, Molybdenum and Tungsten Mining
Record 1, Main entry term, English
- chemical grade
1, record 1, English, chemical%20grade
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Iron-rich chromite was largely restricted to use for chemicals and pigments, and was therefore referred to as "chemical grade". 2, record 1, English, - chemical%20grade
Record number: 1, Textual support number: 2 CONT
Chromite ore grade and specifications: Metallurgical grade ... Refractory grade ... Chemical grade: [more than] 45% Cr2O[ subscript 3] [no more than] 8% SiO2. 3, record 1, English, - chemical%20grade
Record number: 1, Textual support number: 1 OBS
... the traditional ... chemical grade [is] more properly designated as high-iron ... 2, record 1, English, - chemical%20grade
Record 1, French
Record 1, Domaine(s)
- Géochimie
- Mines de chrome, de molybdène et de tungstène
Record 1, Main entry term, French
- qualité chimique
1, record 1, French, qualit%C3%A9%20chimique
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
[...] la chromite riche en fer, utilisée presque uniquement pour la fabrication de produits chimiques et de pigments, était qualifiée de chromite de «qualité chimique». 2, record 1, French, - qualit%C3%A9%20chimique
Record number: 1, Textual support number: 2 CONT
La qualité chimique [de chromite] n'exige guère qu'une teneur en chrome élevée, même si le rapport Cr/Fe est bas, et une teneur en silice basse, ce qui exige un minerai très pauvre en gangue ou un très bon lavage. 3, record 1, French, - qualit%C3%A9%20chimique
Record number: 1, Textual support number: 3 CONT
On distingue trois qualités de chromite : Métallurgique [...] Réfractaire [...] Chimique. Riche en Cr. Souvent faible rapport Cr/Fe. Faible teneur en SiO2. Minerai fin, souvent alluvial (Afrique du Sud, Nouvelle-Calédonie). 4, record 1, French, - qualit%C3%A9%20chimique
Record number: 1, Textual support number: 1 OBS
[...] il est plus approprié de désigner [...] les chromites de qualité [...] chimique de chromites [...] riches en fer. 2, record 1, French, - qualit%C3%A9%20chimique
Record 1, Spanish
Record 1, Textual support, Spanish
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