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DECOMPOSITION OF ALUMINUM NITRIDE IN ALUMINUM DROSS BY ADDING NAOH AQUEOUS SOLUTION TO MIXTURE OF THE ALUMINUM DROSS AND CALCIUM OXIDE
DECOMPOSITION OF ALUMINUM NITRIDE IN ALUMINUM DROSS BY ADDING NAOH AQUEOUS SOLUTION TO MIXTURE OF THE ALUMINUM DROSS AND CALCIUM OXIDE
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机译：用NaOH水溶液混合氧化铝和氧化钙的混合物分解氧化铝中的氮化铝。
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摘要
PROBLEM TO BE SOLVED: To inexpensively remove nitrogen from aluminum nitride incorporated in aluminum dross generated at times of production of aluminum and of the regeneration. SOLUTION: The dross of aluminum is mixed with =20% calcium hydroxide or calcium oxide. By adding a sodium hydroxide aqueous solution to the mixture, the aluminum nitride in the aluminum dross is hydrolyzed and is removed as gaseous ammonia. The treated dross can be used as a soil conditioner for dug and cut mud.
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