ScienceAsia 18 (1992): 105-119 |doi: 10.2306/scienceasia1513-1874.1992.18.105

CHARACTERIZATION OF FERRIC OXIDE OBTAINED FROM UPGRADING OF IRON ORES.

T. TUNKASIR^*, V. OPASNIPAT,⁰ S. CHANTARAMEE,⁺ B. RATANASATHEIN,⁺ S. JUNHAVAT⁺ AND P. ASNACHINDA⁺

ABSTRACT: Iron ore samples were collected From iron deposits in the north east of Thailand. Samples were assessed both before and after an upgrading process (solvent extraction method). Iron salts contributed approximately 40% of the weight of the original samples, and the main impurities were Found to be silica plus acid insolubles. After upgrading, a purity of 99% Fe₂0₃ (by weight) was obtained. Aluminium, barium, zinc and copper salts were measured in small quantities ( 0.1 %), and traces of silicon and antimony were detected. Attention was also given to physical properties of the upgraded Fe₂0₃ (which, for instance, showed good crystallinity and fine grain). Both the chemical and physical properties were Found to compare favorably with commercial laboratory grade Fe₂0₃.

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Department of Physics^*, Department of Chemistry⁰ and Department of Geological Science⁺, Faculty of Science Chiang Mai University, Chiang Mai, Thailand.

Received May 11, 1992