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为提高低碳镁碳耐火材料的抗热震性,采用了不同种类的炭黑制备了ω(C)=3%的低碳镁碳试样。通过浸渍1600℃钢液和风冷热循环实验,评价了试样的抗热震性,并与含16%石墨的传统镁碳试样进行了对比。结果发现,经5次热循环后,添加纳米炭黑N220的低碳镁碳试样具有与其传统镁碳试样相当的抗热震性。
In order to improve the thermal shock resistance of low-carbon magnesium-carbon refractory, different types of carbon black were used to prepare a low-carbon magnesium carbon specimen with ω (C) = 3%. The thermal shock resistance of the samples was evaluated by immersing the molten steel at 1600 ℃ and the air-cooled thermal cycling test. The thermal shock resistance was also compared with that of the conventional magnesium-carbon samples containing 16% graphite. The results showed that after five thermal cycles, the low-carbon magnesium carbon sample with N220 added to nano-carbon black had the same thermal shock resistance as that of its traditional magnesium-carbon sample.