REDUCTION METHOD USING HYDROGEN GAS AND REDUCED IRON POWDER

Title:

REDUCTION METHOD USING HYDROGEN GAS AND REDUCED IRON POWDER

Document Type and Number:

Japanese Patent JP2022167164

Kind Code:

A

Abstract:

To provide a reduction method using hydrogen gas which enables reduction to be performed at lower temperatures, and reduced iron powder which can be produced by the method.SOLUTION: An oxide is reduced using hydrogen gas while a water vapor amount in the atmosphere is reduced by a moisture absorbent. The oxide is preferably an oxide including transition metal. The moisture absorbent preferably includes at least one of calcium, calcium chloride, calcium hydride, calcium sulfate, calcium oxide, copper sulfate, hydrogenated lithium aluminum, magnesium oxide, magnesium perchlorate, magnesium sulfate, zeolite, diphosphorus pentoxide, potassium carbonate, potassium hydroxide, sodium hydroxide, silica gel, sodium sulfate and a sulfuric acid.SELECTED DRAWING: Figure 1

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Inventors:

FUKUSHIMA JUN
TSUCHIDA TAKAYUKI
TAKIZAWA HIROTANE
TOBISE MASAHIRO
SAITO SHIN

Application Number:

JP2021072773A

Publication Date:

November 04, 2022

Filing Date:

April 22, 2021

Export Citation:

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Assignee:

UNIV TOHOKU

International Classes:

C22B5/14; B22F1/00; C21B13/00

Attorney, Agent or Firm:

Shuji Kusunoki

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