日本金属学会誌

J. Japan Inst. Metals, Vol. 34, No. 11 (1970),
pp. 1151-1155

An Investigation on the Occurrence of Abnormal Value in the Fluorescent X-Ray Analysis of Iron in Iron Ore

Minoru Sasaki1, Yoshio Uzuki1 and Hirahisa Kawase2

1Tokyo Research Institute, Nippon Steel Corporation, Kawasaki
2Kimitsu Works, Nippon Steel Corporation, Kimitsu

Abstract:

Analytical samples of thirty five sorts of iron ore were prepared by dry and wet crushing methods. Abnormal large values in the analysis of iron were obtained in the following cases: (a) Hematite in the analytical sample made from microcrystalline hematite ore was concentrated in size of below two microns fraction. (b) Goethite in weathered iron ore was preferentially pulverized to the size of below about 0.5 micron. (c) Hard and large crystalline quartz accompanied with iron ore, being not finely pulverized, was gathered in the range of coarse particle of the sample. While, the small value of iron was obtained in the analysis of hard and coarse grained magnetite ore. The occurrence of the abnormal value was considered due to discrepancies in size distributions of powder particles of constituent minerals.
Simillar tendencies were also shown in the analysis of fine powder samples prepared by a wet crushing method.


(Received 1970/8/1)

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