PROCESS FOR REMOVING POLLUTANTS FROM EFFLUENTS RESULTING FROM TITANIUM AND ZIRCONIUM WASTE PICKLING

The invention relates to a process for effectively removing Ti, Zr, F from industrial waste water resulting from titanium and zirconium recyclable waste pickling, with a view to reducing pollution. According to the invention, the process consists of the neutralization of waste water up to a pH=5...5...

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Hauptverfasser: ROSCA SILVIU, STANCIU DOINA ECATERINA, VELEA TEODOR, ANGER ILDIKO ELISABETA
Format: Patent
Sprache:eng ; rum
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Zusammenfassung:The invention relates to a process for effectively removing Ti, Zr, F from industrial waste water resulting from titanium and zirconium recyclable waste pickling, with a view to reducing pollution. According to the invention, the process consists of the neutralization of waste water up to a pH=5...5.5 with alkali or with solid sodium carbonate in a F:Na ratio of 1:2, followed by a solid calcium carbonate treatment. Invenţia se referă la un procedeu de îndepărtare eficientă a Ti, Zr, F, din apele industriale, reziduale, provenite de la decaparea deşeurilor refolosibile de titan şi zirconiu, în vederea reducerii poluării. Procedeul conform invenţiei constă în neutralizarea apelor reziduale, cu alcalii, până la un pH= 5...5,5, cu carbonat de sodiu solid, la raport F:Na de 1:2, urmată de tratare cu carbonat de calciu solid.