Title:
【発明の名称】金属マグネシウム、酸化マグネシウム又は耐火材の製造方法
Document Type and Number:
Japanese Patent JPH08503024
Kind Code:
A
Abstract:
PCT No. PCT/DK92/00339 Sec. 371 Date Jul. 13, 1995 Sec. 102(e) Date Jul. 13, 1995 PCT Filed Nov. 16, 1992 PCT Pub. No. WO94/11539 PCT Pub. Date May 26, 1994Metallic magnesium and pure magnesium oxide are produced by carbothermal reduction of starting materials such as magnesium oxide containing minor amounts of oxides of Fe, Si, Ca and Al, and/or magnesium silicate minerals, such as olivine, at subatmospheric pressure. Metallic magnesium is evaporated from a reduction zone and pure metallic magnesium and pure magnesium oxide are precipitated in a second condensation zone. Si is partly evaporated as SiO which is precipitated in a first condensation zone upstream the second condensation zone, partly converted to SiC and an alloy of Si and Fe in the reaction mixture. The starting materials may also be processed by a method wherein their magnesium component is converted to magnesium oxide in the reaction mixture, while the remaining components are converted to SiC and an alloy of Si and Fe. Au and valuable siderophilic elements may be recovered by leaching the alloy of Si and Fe.
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Inventors:
Engel, John
Frederiksen, Yenz Sonderberg
Nielsen, Karsten Agersted
Frederiksen, Yenz Sonderberg
Nielsen, Karsten Agersted
Application Number:
JP51160494A
Publication Date:
April 02, 1996
Filing Date:
November 16, 1992
Export Citation:
Assignee:
Mineral Development International Actiesel Scab
International Classes:
C01B31/36; C01F5/02; C01F5/00; C01F5/04; C22B26/22; C22B; (IPC1-7): C22B26/22; C01F5/00
Attorney, Agent or Firm:
Akira Asamura (3 outside)