Magnesium production

Details Magnesium production Magnesium production

C - Chemistry, Metallurgy

22

B

53/261

C22B 26/22 (2006.01)

Patent

CA 1141171

MAGNESIUM PRODUCTION Docket 6631-G Robert M. Kibby ABSTRACT OF THE DISCLOSURE Magnesium metal is produced in a magnesium reduction fur- nace by the reaction of aluminum metal with a calcium magnesium aluminate slag or with magnesium oxide in the presence of such slag, wherein aluminum is fed to the magnesium reduction furnace as an aluminum silicon alloy and wherein magnesium oxide is fed in less than stoichiometric amounts so that not all of the alumi- num is reduced, such additions producing magnesium vapor and two liquid layers: an aluminum silicon alloy having a reduced alumi- num content and a MgO?CaO?Al2O3 ? TiO2 slag. The aluminum silicon alloy layer is tapped and recovered from the furnace. The re- covered alloy may be used in the production of silicon alloy product by addition to aluminum.

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