Title:
TUNGSTEN-CONTAINING METAL PRODUCTION METHOD AND TUNGSTEN-CONTAINING METAL
Document Type and Number:
WIPO Patent Application WO/2017/175605
Kind Code:
A1
Abstract:
The present invention provides: a tungsten-containing metal production method that includes simple steps and that enables lowering of impurities content; and a tungsten-containing metal. A tungsten-containing raw material, silicon and/or aluminum as a reducing agent for reducing tungsten oxide in the tungsten-containing raw material, and a slag-making material are loaded into an electric furnace (S1). The tungsten-containing raw material is melted and reduced in the electric furnace to generate a tungsten-containing metal and slag (S2). The amount of the reducing agent is 1.0-1.5 times as much as the chemical equivalent required for reduction of tungsten oxide. The slag has a degree of basicity (CaO/SiO2) of 0.2-5.0.
Inventors:
SUGIMORI HIROICHI (JP)
WASHIO MASARU (JP)
WASHIO MASARU (JP)
Application Number:
PCT/JP2017/012049
Publication Date:
October 12, 2017
Filing Date:
March 24, 2017
Export Citation:
Assignee:
JFE MAT CO LTD (JP)
International Classes:
C22B34/36; C22B5/04; C22C27/04
Domestic Patent References:
| WO2013187348A1 | 2013-12-19 |
Foreign References:
| CN1113962A | 1995-12-27 |
Other References:
MASAYOSHI, TADA ET AL.: "PREPARATION OF ULTRA PURE TUNGSTEN", JOURNAL OF ADVANCED SCIENCE, vol. 4, no. 3, 1992, pages 223 - 227, XP055429114, ISSN: 0915-5651, Retrieved from the Internet
TAKUZO FUJITA: "Kurimura Kinzoku Kyogyo Kabushiki Kaisha ni Okeru Ferrotungsten no Seiren", JOURNAL OF THE MINING AND MATERIALS PROCESSING INSTITUTE OF JAPAN, vol. 109, no. 12, December 1993 (1993-12-01), pages 1094 - 1098, ISSN: 0916-1740, Retrieved from the Internet
TAKUZO FUJITA: "Kurimura Kinzoku Kyogyo Kabushiki Kaisha ni Okeru Ferrotungsten no Seiren", JOURNAL OF THE MINING AND MATERIALS PROCESSING INSTITUTE OF JAPAN, vol. 109, no. 12, December 1993 (1993-12-01), pages 1094 - 1098, ISSN: 0916-1740, Retrieved from the Internet
Attorney, Agent or Firm:
SHIOJIMA, Toshiyuki (JP)
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