电熔镁砂是用精选的特A级天然菱镁石或高纯轻烧镁颗粒，在弧炉中熔制得该产品具有纯度高，结晶粒大，结构致密，抗渣性强材料，热震稳定性好，是一种优良的高温电气绝缘材料，也是制作高档镁砖，镁碳砖及不定型耐火材料的重要原料.GradeMgO (min.)SiO2(max.)CaO (max.)Fe2O3(max.)Al2O3(max.)L.O.I.B.D. (g/cm3)FM9999%0.22%0.46%0.18%0.60%0.08%3.5FM98598.50%0.35%0.72%0.25%0.80%0.10%FM9898%0.45%0.86%0.47%0.10%0.10%FM97897.80%0.55%1.10%0.35%0.10%0.10%FM97597.50%0.65%1.25%0.04%0.10%0.10%FM97white97%0.73%1.40%0.45%0.11%0.11%FM97black97%0.75%1.52%0.50%0.13%0.11%