Method of reconditioning foundry sand

B - Operations – Transporting – 22 – C

Patent

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B22C 1/00 (2006.01) B22C 5/00 (2006.01) B22C 5/18 (2006.01)

Patent

CA 2022769

A B S T R A C T The invention relates to a process for reconditioning mono or mixed foundry sand containing organic and/or inorganic binders, where the sand containing organic binder after a thermal regeneration or the sand containing inorganic binder after a thermal and mechanical regeneration is neutralized with a suitable base or acid depending on its pH-value determined after regeneration by a measuring procedure, so that it subsequently has a pH-value between 6 and 8.

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