Process for treatment of sulfuric acid pickling waste liquor for pickling steel

The process for treatment of waste pickle liquor from pickling steel with sulfuric acid is characterized by that the concentrated sulfuric acid is added in waste pickle liquor so as to raise its degree of acidity, then frozen to crystallize ferrous sulfate, and filtered, the ferrous sulfate as by-pr...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	TIANMIN FAN, FENGQUN SANG, JICHANG SUN
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY
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