Process for neutralizing regenerated sand
Sand containing clay binder after regeneration is neutralized with NH4OH as a base or sulfuric acid or hydrofluoric 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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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | Sand containing clay binder after regeneration is neutralized with NH4OH as a base or sulfuric acid or hydrofluoric 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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