The naterial of electro-fused magnesia sinter is selected from soec-ial grade A natural magnesite or high-purity caustic calcined magnesite, which is fused in arc furnace to finish the products.The products poss-ess high purity, bigh crxstalline grain and compact texture, have high heat-vobration steady and cinder corrosion resistant. It is used for ma-king high quality magnesite bricks, magnesia-carbon bricks and unshaped refractory materials.Our factory the electro-fused magnesia the specification is MgO 96%-97%SIO2 1.8%-1.3% AL2O3 0.5%-0.4% CAO 1% FE2O3 0.5% -0.6% B.D. 3.35%-3.45%G/CM3