Manganese Ores used for Production of High Carbon Ferromanganese

YAGIHASHI Tetsuo, ASADA Kazuo, ATARASHIYA Koji, ICHINOHE Shun-ichi, HANADA Hiromichi

doi:10.2355/tetsutohagane1955.49.7_971

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高炭素フェロマンガン製造用マンガン鉱石について
コウタンソフェロマンガンセイゾウヨウマンガンコウセキニツイテ
マンガン鉱石の性状および還元に関する研究-I
Studies on properties and reduction of manganese ores-I

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Abstract

To study on the reducibility of some manganese ores which are used for ferromanganese production, we investigated their properties in the first place. We obtained the following results of X-ray diffraction, differential thermal analysis and thermal balance analysis.<BR>(1) Foreign ores are mostly MnO₂ ores, and their attendant minerals are MnO·OH, 3Mn₂O₃·MnSiO₃, hydrated Mn oxide, SiO₂, etc. MnO₂ ores have α-, β-, γ- and/or δ-phases and most of them are these mixtures.<BR>(2) In every MnO₂ ore, γ- and δ-phases are incompletely crystalline, and they are reduced to Mn₂O₃ or Mn₃O₄ easily at comparative low temperature. Ghana ore, which is γ-MnO₂, belongs to the above group, and is expected to have high reducibility.<BR>(3) Domestic ores are mostly manganese carbonate ores or silicate ores, and mineral compositions of burnt ores represent variations in the burning temperature and atmosphere.<BR>(4) Quantitative studies on such mineral compositions will be continued futhermore.

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Tetsu-to-Hagane

Tetsu-to-Hagane 49 (7), 971-975, 1963

The Iron and Steel Institute of Japan

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