Electric melting method for synthesizing low silicon high calcium quality magnesia using low grade magnesite

Electric melting method for synthesizing low silicon high calcium quality magnesia using low grade magnesite

The invention discloses a synthesizing method of low-silicon high-calcium premium magnesite, which comprises the following steps: optimizing low-grade magnesite; breaking; allocating; blending evenly; fusing in the electric furnace for 10-12 h at 2800-3300 deg. c; adding 1-2% rare earth element and...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: LINRU,ZHANG LI
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
CONCRETE
INORGANIC CHEMISTRY
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:The invention discloses a synthesizing method of low-silicon high-calcium premium magnesite, which comprises the following steps: optimizing low-grade magnesite; breaking; allocating; blending evenly; fusing in the electric furnace for 10-12 h at 2800-3300 deg. c; adding 1-2% rare earth element and 5-30% light-burned magnesia powder in the fusing course; setting the retention time between 2 and 8s; draining SiO2 completely; cooling slowly; manufacturing the product with magnesium content at 96-98%.