石墨加入量对低碳镁碳砖性能的影响

Effect of Graphite Addition on Performance of Low-carbon MgO-C Brick

通过检测含有2%～14%石墨镁碳砖1400℃的高温抗折强度、1500℃的热膨胀系数、1000℃×2 h煅烧后的抗氧化性,比较低碳镁碳砖与传统镁砖的性能差异,研究了石墨加入量对低碳镁碳砖性能的影响。结果表明:在有2%Al存在的情况下,低碳镁碳砖高温抗折强度与石墨加入量无关;石墨加入量为6%时,可保证低碳镁碳砖具有较优良的抗剥落性及抗氧化性。

2% - 14% graphite added in MgO-C brick, across inspecting HMOR at 1400 ℃, coefficient of thermal expansion at 1500 ℃, antioxidant after calcined at 1000 ℃×2 h, compare different performance between Low-carbon MgO-C brick and tradition MgO-C brick, study the effect of graphite addition on Low-carbon MgO-C brick performance. It showed that： AI is 2%, HMOR of MgO-C brick has no relation on addition of graphite, graphite is 6%, low-carbon MgO-C brick has fine spalling resistance and antioxidant.