Process of preparing sinter magnesia
AssigneeVeitscheer Magnesitwerke-Actien-Gesellschaft
InventorsHelmut Grohmann, Peter Stadler
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Abstract
In a process of preparing sinter magnesia from magnesium oxide in a sintering kiln evolving flue gases during sintering, the flue gases are washed before their removal from the kiln to the atmosphere with a portion of the magnesium chloride slurry formed during the preparation of the magnesium oxide and the magnesium chloride slurry used for washing the flue gases is recycled to the slurry wherefrom the magnesium sol for making the magnesium oxide is derived.
Claims8
A process of preparing sinter magnesia from magnesium oxide in a sintering kiln evolving flue gases including hydrochloric acid and sulfur dioxide during sintering, the magnesium oxide being prepared by the thermal decomposition of a magnesium chloride sol derived from a slurry of a magnesium-containing starting material dissolved in hydrochloric acid to form a magnesium chloride slurry and subsequent treatment of the slurry to precipitate and remove impurities therefrom, comprising the steps of washing said flue gases before removal thereof from the kiln to the atmosphere with a portion of the magnesium chloride slurry formed during the preparation of the magnesium oxide, and recycling the magnesium chloride slurry used for washing the flue gases to the slurry wherefrom the magnesium sol is derived.
Dependencies are inferred from the claim text.