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 :MgO96%-97%,SIO2:1.8%-1.3%,AL2O30.5%-0.4%,CAO1%,FE2O30.5% -0.6%,B.D.3.35%-3.45%G/CM3