重烧镁砂是选用天然菱镁矿石，经提纯，高温竖窑煅烧而成的。它是制砖及生产不定型耐火材料的理想原料，成品用于炼钢、电炉炉底和捣打炉衬。
    Dead Burned MgO is produced with selected natural magnesite through purifying,calcining in shaft kiln.lt s an ideal material for making bricks and unshaped refractorymaterials,the final products are used in electric furnace bottom and furnace's liningtamping.