| 摘要 |
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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