C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
C03B 5/02 (2006.01) C03B 5/00 (2006.01) G21F 9/34 (2006.01)
Patent
CA 2277408
The aim of the present invention is a process for preparing a mineral matrix by melting, which is implemented according to the method of direct cold crucible induction melting, said method comprising an initiation step for initiating the melting. Characteristically, during said initiation step, a conductive mineral load is generated, by introduction of constituent elements of said matrix, into a bath of a conductive liquid, brought by induction to a suitable temperature, in said cold crucible; said intervening conductive liquid having the property of being liquid and an electric conductor between a temperature .theta.1 of less than 600°C, advantageously of between 100 and 500°C, and a temperature .theta.2 at least equal to the temperature at which the constituent elements of said matrix melt to generate said matrix. Said bath of conductive liquid is advantageously a molten sodium hydroxide bath for preparing a glass matrix. The preparation of such a glass matrix is advantageously implemented within the context of a method of vitrifying radioactive waste materials.
Cantin Patrick
Kalousdian Philippe
Sim & Mcburney
Societe Generale Pour Les Techniques Nouvelles -S.g.n.
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