PROCESS FOR THE PRODUCTION OF PNEUMATICALLY FEEDABLE ANHYDRITE

1418402 Anhydrite from HF kiln residue BAYER AG 2 Feb 1973 [3 Feb 1972] 5248/73 Heading C1A Anhydrite is produced by adding a neutralizing agent to the hot kiln residue formed in the production of HF by the reaction of CaF 2 with H 2 SO 4 , immediately cooling to 80-150‹ C. in an atmosphere containi...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	HINSCHE F, SPRECKELMEYER B, SCHABACHER W
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS COMPOUNDS THEREOF CONCRETE INORGANIC CHEMISTRY LIME, MAGNESIA METALLURGY NON-METALLIC ELEMENTS REFRACTORIES SLAG TREATMENT OF NATURAL STONE
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	1418402 Anhydrite from HF kiln residue BAYER AG 2 Feb 1973 [3 Feb 1972] 5248/73 Heading C1A Anhydrite is produced by adding a neutralizing agent to the hot kiln residue formed in the production of HF by the reaction of CaF 2 with H 2 SO 4 , immediately cooling to 80-150‹ C. in an atmosphere containing water, removing excess water and grinding. The kiln residue may be size reduced before or during the addition of the neutralizing agent which is preferably CaO or Ca(OH) 2 . The neutralizing agent may be added in a quantity such that the residue contains 0À5-3% by weight excess agent (calculated as CaO on CaSO 4 basis). The cooling may be effected by spraying water over the residue. Activators (e.g. sulphates of aluminium, iron and potassium) may be added before the cooling.