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pro vyhledávání: '"B. O. Holland"'
Autor:
B. O. Holland
Publikováno v:
Industrial & Engineering Chemistry Fundamentals. 5:204-207
Publikováno v:
Nature. 187:683-684
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 jaspi