METHOD OF REUSING WASTE WATER SLUDGES CONTAINING MIXTURES OF HEAVY METAL HYDROXIDES AND/OR HYDROXOCARBONATES

FIELD: waste water treatment. SUBSTANCE: invention relates to waste waters produced at metalworking enterprises, which are reused as raw additives in production of concrete products. Mixes of natural limestone and clay needed for concrete production, are modified with waste water sludges replacing 5...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	SOBENEVSKAJA LARISA NIKOLAEVNA, BAJZUL'DIN BULAT MUKAEVICH, DYKHANOV NIKOLAJ NIKIFOROVICH
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS LIME, MAGNESIA METALLURGY REFRACTORIES SLAG TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF NATURAL STONE TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	FIELD: waste water treatment. SUBSTANCE: invention relates to waste waters produced at metalworking enterprises, which are reused as raw additives in production of concrete products. Mixes of natural limestone and clay needed for concrete production, are modified with waste water sludges replacing 5-35% of calculated amount of clay with equivalent summary amount of aluminum, iron, and chromium. Components are mixed and fired at 1450-1500 C until residual content of free calcium oxide is no higher than 0.5 wt %. Firing product is cooled, crushed, and used to prepare concrete. EFFECT: reduced environmental danger of waste- containing concrete due to increased resistance of concrete products against leaching of toxic heavy metal ions by natural water. 3 tbl, 3 ex