Title:
METHOD FOR MANUFACTURING HIGH PURITY MANGANESE AND HIGH PURITY MANGANESE
Document Type and Number:
WIPO Patent Application WO/2015/060026
Kind Code:
A1
Abstract:
The present invention relates to a method for manufacturing high purity Mn, the method being characterized in that: a Mn starting material is placed in a magnesia crucible and is melted at a melting temperature of 1240-1400°C using a vacuum induction melting furnace (VIM furnace) under an inert atmosphere of 500 Torr or less; calcium is added in a range of 0.5-2.0% of the Mn weight to perform de-oxygenation and de-sulfurization; after completion of the de-oxygenation and de-sulfurization, an ingot is manufactured by pouring into an iron mold; then said Mn ingot is loaded in a scull melting furnace, the pressure is reduced to 10-5 Torr or less using a vacuum pump, and heating is started; and after the melted state is maintained for 10-60 minutes, the melting reaction is completed to obtain high purity Mn. The present invention provides a method for manufacturing high purity metal Mn from commercially available electrolytic Mn. In particular, the present invention addresses the problem of obtaining high purity metal Mn with low amounts of impurities such as B, Mg, Al and Si.
Inventors:
YAGI KAZUTO (JP)
Application Number:
PCT/JP2014/073615
Publication Date:
April 30, 2015
Filing Date:
September 08, 2014
Export Citation:
Assignee:
JX NIPPON MINING & METALS CORP (JP)
International Classes:
C22B47/00; C22B9/04; C22C22/00
Domestic Patent References:
| WO2013111609A1 | 2013-08-01 |
Foreign References:
| JP2002285373A | 2002-10-03 |
Attorney, Agent or Firm:
OGOSHI Isamu et al. (JP)
Isamu Ogoshi (JP)
Isamu Ogoshi (JP)
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