Formation of Fayalite in Roast Reduced Jaspilite

Autor:	B. O. Holland, T. R. Thomson, J. B. Lean, K. J. Tucker
Rok vydání:	1960
Předmět:	chemistry.chemical_compound Multidisciplinary Materials science chemistry Metallurgy Mineralogy Fayalite Quartz Roasting Matrix (geology) Grinding Magnetite
Zdroj:	Nature. 187:683-684
ISSN:	1476-4687 0028-0836
DOI:	10.1038/187683c0
Popis:	A MAGNETIZING roasting treatment of a fine-grained haematite-quartzite known as jaspilite, occurring in South Australia, is at present being evaluated1. When heated in reducing gases at appropriate temperatures, 550–650° C., the haematite in jaspilite is converted to magnetite. Extensive microcracking also occurs in the quartz matrix (Fig. 1A). This cracking allows freer access of reducing gases to the haematite particles undergoing reduction and facilitates grinding prior to magnetic concentration2.
Databáze:	OpenAIRE
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