石墨粒度对低炭镁炭砖性能的影响  

Effect of graphite particle size on properties of low carbon MgO-C brick

作　　者：欧阳军华[1] 刘开琪[1] 王秉军[1] 

机构地区：[1]钢铁研究总院特种陶瓷与耐火材料事业部,北京100081

出　　处：《耐火材料》2004年第6期383-385,392,共4页Refractories

摘　　要：以电熔镁砂和4种粒度(≤0.149mm、 ≤0.074mm、≤0.044mm和≤0.01mm)的天然鳞片 石墨为主原料,在石墨含量为4%的条件下,研究了 石墨粒度对低炭镁炭砖的物理性能、抗氧化性和热震 稳定性的影响。结果表明:用细石墨取代较粗石墨 (粒度≤0.149mm)制成的镁炭砖,其物理性能、抗氧 化性和热震稳定性都有了明显的改善,且都以加入粒 度≤0.074mm石墨的效果最好。其原因是细石墨的 加入改善了镁炭砖的基质结构。The effect of graphite granularity on physical properties,oxidation resistance and thermal shock resistance of low carbon MgO-C brick was studied at the condition of adding 4% graphite and using large crystal fused magnesia and four granularity (separate for ≤0.149 mm,≤0.074 mm,≤0.044 mm,≤0.01 mm ) nature flake graphite as main materials.The results show:the MgO-C brick’s physical properties,oxidation resistance and thermal shock resistance all improved obviously with fine graphite replacing the coarse graphite,and adding the graphite with granularity less than 0.074 mm has the best effect.The main reason is that adding fine graphite can optimize the matrix structure of MgO-C brick.

关 键 词：天然鳞片石墨 热震稳定性 炭砖 粒度 物理性能 取代 抗氧化性 石墨含量 电熔镁砂 

分 类 号：TQ175[化学工程—硅酸盐工业] TQ127.11