BREAKAGE OF MOLTEN SALT OF ALKALI METAL AND ALKALI EARTH METAL

摘要

PURPOSE: To destroy dangerous waste such as Na in a molten salt bath and to prepare a safe alkali metallic or alkaline earth metallic salt by allowing the alkali metal or alkaline earth metal to react with a CO2 -O2 mixture in the molten salt bath such as a molten alkali carbonate. CONSTITUTION: Alkali metal or alkaline earth metal-containing dangerous waste is fed into a molten salt bath 16 containing a molten salt selected from the group consisting of alkali metallic carbonates, alkali metallic halides, alkaline earth metallic halides and mixtures of those. A CO2 -O2 mixture is also fed into the molten salt bath 16. The ratio between CO2 and O2 is made at least sufficient for stoichiometric reaction with the alkali metal or alkaline earth metal in the waste. The alkali metal or alkaline earth metal is allowed to react with the CO2 and O2 in the molten salt bath 16 at a higher temperature than the melting point of the salt in the bath 16 and the alkali metal or alkaline earth metal is converted into safe carbonate in the bath 16.