Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1983-03-10
1984-10-23
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 10R, 75 67A, C22B 2620
Patent
active
044786379
ABSTRACT:
Magnesium is produced by a thermal reduction process in a reaction-condensation system having a reaction zone and a condensation zone. According to this process, a reducing agent containing ferrosilicon and at least 25 wt. % aluminum is contacted in the reaction zone with a calcium-silicon-aluminum-magnesium oxide slag to produce magnesium vapor. The magnesium vapor is transported from the reaction zone to the condensation zone and condensed therein. The slag is maintained to contain from 1 to 8 wt. % MgO, at least 9 wt. % Al.sub.2 O.sub.3, and have a CaO/SiO.sub.2 weight ratio no less than that provided by the formula 2.1+0.03 (wt. % Al.sub.2 O.sub.3 -9). The slag is also maintained so as to decrepitate upon cooling.
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Ballain Marlyn D.
Bowman Kenneth A.
Christini Roy A.
Rolles Rolf
Aluminum Company of America
Rosenberg Peter D.
Smith Brian D.
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