Preparation method of single crystal fused magnesia made of magnesium chloride

The preparation method of single crystal fused magnesia made of magnesium chloride is hot-melt. Magnesium chloride hexahydrate with a content of ≥46% is dissolved with 45-50 ° C water to a solution with a specific gravity of 1.34-1.36, and the filter residue is discarded after filtering. Use an acid-resistant pump to spray the solution in the storage tank through a porous nozzle into a slurry feed boiling roasting furnace at 900 to 1000 ° C to dehydrate and pyrolyze. * Lightly burn magnesium oxide powder and hydrogen chloride gas, and use the pressure in the furnace to enter the cyclone separator with the exhaust gas. Separated from the glass wire bag twice, magnesium oxide enters the silo, and a small amount enters the glass wire bag for recovery. Magnesium oxide plus an appropriate amount of magnesium chloride solution is bonded and solidified, and then made into 0-10mm particles by a ball forming machine, and then dried, electrofused, naturally cooled, and sorted to become the finished product. The invention has the advantages of advanced technology, reliable technology, easy operation, short melting cycle, energy saving, high product yield and good quality. It can be used in optical instrument manufacturing and electronics industries with good economic benefits.