Fused Magnesia 98%

Product description:

Fused Magnesia 98% (FM 98%) is normally manufactured by the electric arc melting of caustic calcined magnesia, deadburned magnesia or raw magnesite in furnaces at temperatures in excess of 2750°C, producing a refractory product whose altered crystalline structure is such that its characteristics and performance are superior to competing materials.

Application:

Fused magnesia 98% is superior to deadburned magnesia in strength, abrasion resistance and chemical stability. Major applications are in refractory and electrical insulating markets. Producers of fused magnesia commonly fall into one of two categories: those producing refractory grades and those producing electrical grades. Few producers serve both markets on a mainstream basis.

Fused Magnesia 98% Production Process:

Magnesite(magnesium carbonate MgCO₃)is converted into magnesia by the application of heat which drives off carbon dioxide(CO₂), thereby converting the carbonate to the oxide of magnesium(MgO).

Magnesite, from both natural sources(primarily magnesite) and synthetic sources(seawater, natural brines or deep sea salt beds), is converted into caustic calcined magnesia by calcining to between 700℃ and 1000℃, driving off 96-98 per cent of the contained carbon dioxide. Caustic calcined magnesia id both an end product and an intermediary step in the chain of magnesia products.

Further calcining of magnesite at higher temperatures between 1750-2200℃ results in the largely inert product, deadburned magnesia. Heating to this level drives off all but a small fraction of the remaining carbon dioxide to produce a hard crystalline non reactive from of magnesium oxide known as periclase.

Fused magnesia 98% is produced in a three phase electric arc furnace. Taking high grade magnesite or calcined magnesia as raw materials, 12 hours is required for the fusion process at temperatures in excess of 2750℃. The process promotes the growth of very large crystals of periclase(＞1000 microns compared with 50-100 microns for dead burned magnesia) with a density approaching the theoretical maximum of 3.58g/cm³.

In fused magnesia 98% production, the main constraints on capacity are the size and number of electric arc furnaces, and the cost of energy. The manufacture of fused magnesia is very power intensive with electricity consumption varying between 3500-4500 kWh/tonne; Fused magnesia producers often quote total capacity based on utilizing off peak power.

Packing bag: Jumbo bag(or according to the customer requirement)

Payment: T/T; D/P; L/C (According to the consultation with the customer)

HS. Code: 2519901000