Method for producing hematite for ironmaking

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United States of America Patent

PATENT NO 10125025
APP PUB NO 20160362304A1
SERIAL NO

15121403

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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There is provided a method for producing (high purity) hematite for ironmaking, in a process where a mineral acid and an oxidizing agent are added to an ore containing iron and a valuable metal and then the valuable metal is leached under high temperatures and high pressures, comprises the steps of: (1) a high pressure leach step; (2) a preliminary neutralization step; (3) a solid-liquid separation step 1; (4) a neutralization step 1; (5) a neutralization step 2; (6) a solid-liquid separation step 3; (7) seed crystal addition treatment; (8) a solid-liquid separation step 2; and (9) a firing step.

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Patent Owner(s)

Patent OwnerAddress
SUMITOMO METAL MINING CO LTDTOKYO JAPAN TOKYO METROPOLIS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Imamura, Masaki Tokyo, JP 36 194
Kan, Yasumasa Tokyo, JP 13 21
Ohara, Go Tokyo, JP 16 93

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