METHOD OF PRODUCING A CEMENT WITH REDUCED CONTENT OF CHROMIUM

Disclosed is a manufacturing method for cement with lowered contents of chrome, consisting of that into the raw mixture as iron corrective compound is used 0.01 to 10 % wt. of mechanically and/or thermally modified iron carbonate followed by cauterization of the raw mixture under the temperature fro...

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Bibliographische Detailangaben
Hauptverfasser:	STRIGAC JULIUS, ORSAG ZDENO, MARTAUZ PAVEL
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DISPOSAL OF SOLID WASTE LIME, MAGNESIA METALLURGY PERFORMING OPERATIONS RECLAMATION OF CONTAMINED SOIL SOIL REFRACTORIES SLAG TRANSPORTING TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	Disclosed is a manufacturing method for cement with lowered contents of chrome, consisting of that into the raw mixture as iron corrective compound is used 0.01 to 10 % wt. of mechanically and/or thermally modified iron carbonate followed by cauterization of the raw mixture under the temperature from 1 400 to 1 500 C, to achieve primar lowering of the contents CrVI in the cement to 0.5 to 20 ppm CRVI. Into such prepared cement are during the grinding and/or after grinding added chemically modified - activated iron carbonates in amount of 0.01 to 1 % wt.