摘要
以配料组成（w）：≤3mm的高纯镁砂82％、≤3μm的Si02微粉6％、≤0．043mm的SiC微粉9％、≤0．045mm棕刚玉微粉3％、≤0．045mm的Al粉0．5％（外加）为基础配方，用炭黑替代部分镁砂粉研究了炭黑添加量（w）为0、0．2％、0．4％、0．6％时对镁质浇注料施工性能、力学性能及抗渣性能的影响。结果表明：在加水量一定的情况下，随着炭黑加入量的增加，浇注料的流动性能逐渐降低；干燥后试样的抗折强度和耐压强度均高于1500℃3h热处理试样的；不同气氛下烧结，浇注料的抗渣性呈现逐渐增强的趋势，在炭黑加入量为0．2％～0．4％（w）时，浇注料具有较好的常温物理性能及抗渣性。
The magnesia-based castable specimens were prepared using 82% （in mass,the same hereinafter） high purity magnesia （ ≤3 mm）, 6% SiO2 micropowder （ ≤3 μm） ,9% SiC micropowder （≤0. 043 mm） ,3% brown corundum micropowder （ ≤0.045 mm） and 0.5% AI powder （ ≤0.045 mm,extra added）. Using carbon black to partially replace magnesia powder,the influences of carbon black additions （0,0.2% ,0.4% and 0.6% ） on workability, mechanical property and slag resistance of magnesia-based castables were researched. The results show that.with a fixed water addition,as the carbon black addition increases,the flowability decreases gradually; the modulus of rupture and compressive strength of dried specimens are higher than those of the specimens fired at 1500℃ for 3 h;the slag resistance of the specimens fired under different atmospheres increases gradually,and the specimens with 0.2%-0.4% carbon black perform good cold physical properties and slag resistance.
出处
《耐火材料》
CAS
北大核心
2014年第1期50-53,共4页
Refractories
关键词
炭黑
SIO2微粉
镁质浇注料
carbon black
silica micropowder
magnesia-based castable
