Method of producing metallic magnesium, magnesium

专利名称：Method of producing metallic magnesium,

magnesium oxide or a refractory material

发明人：John Engell,Jens S.o slashed.nderberg

Frederiksen,Karsten Agersted Nielsen

申请号：US08/436213申请日：19950713公开号：US05803947A公开日：19980908

摘要：Metallic magnesium and pure magnesium oxide are produced by carbothermalreduction of starting materials such as magnesium oxide containing minor amounts ofoxides 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 andpure metallic magnesium and pure magnesium oxide are precipitated in a secondcondensation zone. Si is partly evaporated as SiO which is precipitated in a first

condensation zone upstream the second condensation zone, partly converted to SiC andan alloy of Si and Fe in the reaction mixture. The starting materials may also be processedby a method wherein their magnesium component is converted to magnesium oxide inthe reaction mixture, while the remaining components are converted to SiC and an alloyof Si and Fe. Au and valuable siderophilic elements may be recovered by leaching thealloy of Si and Fe.

申请人：MINERAL DEVELOPMENT INTERNATIONAL A/S

代理机构：Finnegan, Henderson, Farabow, Garrett & Dunner

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