Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Alkaline earth metal
Patent
1977-02-01
1978-09-12
Vertiz, O. R.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Alkaline earth metal
423635, 423636, C01F 502
Patent
active
041138341
ABSTRACT:
A process for the production of magnesium oxide of moderate activity and high availability from a waste material containing dead-burned magnesium oxide of essentially no activity and lower availability (e.g., spent basic oxygen furnace firebrick) is disclosed. Spent basic oxygen furnace firebrick particles are calcined at a temperature of about 1000.degree. to about 2000.degree. F. for a time of from about 15 to about 60 minutes. The magnesium oxide in the spent, calcined firebrick is thus converted from dead-burned magnesium oxide to a magnesium oxide having a solubility of above about 90% in dilute hydrochloric acid and moderate activity in the nature of light-burned magnesium oxide. The color of the calcined magnesium oxide is also improved and the carbon content of the spent firebrick is essentially removed. The resulting product is generally useful in the same manner as conventional light-burned magnesium oxide.
REFERENCES:
patent: 3287144 (1966-11-01), Hodl et al.
patent: 3378615 (1968-04-01), Zisner
patent: 3436237 (1969-04-01), Crookston et al.
patent: 3677779 (1972-07-01), Hughey
patent: 3689218 (1972-09-01), Hodges
Show Roger
Webb Robert
Langel Wayne A.
Vertiz O. R.
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