PURIFYING METHOD OF WASTE LIQUID OF HYDROCHLORIC ACID PICKLING OF STEEL

PURPOSE:To make the filtrate suitable as the raw material for ferrite by filtering the waste liquid of hydrochloric acid pickling of steel with an activated carbon filter and removing the sludge and the coarse granular SiO2 contained in the waste liquid. CONSTITUTION:The waste liquid of hydrochloric...

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Bibliographische Detailangaben
Hauptverfasser:	HORIIKE MASARU, FUJITA KENICHI, MIYATAKE YUJI, HATTORI KATSUO, MIYABE AKINOBU
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 TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	PURPOSE:To make the filtrate suitable as the raw material for ferrite by filtering the waste liquid of hydrochloric acid pickling of steel with an activated carbon filter and removing the sludge and the coarse granular SiO2 contained in the waste liquid. CONSTITUTION:The waste liquid of hydrochloric acid pickling of steel is filtered by using an activated carbon filter and the sludge and the coarse granular SiO2 contained in the waste liquid are removed. Furthermore if necessary, the filtrate is passed through an adsorption tower packed with the silica gel particles as the second stage to decrease the fine granular SiO2 remarkably. The filtrate obtained in such a way can be made suitable as the raw material of ferrite.