LI Lin
,
TANG Guangsheng
,
HE Zhiyong
,
et al
钢铁研究学报(英文版)
Carbon black-phenolic resin composite binders with various amounts of nanometer carbon black were prepared through adding KH-550 coupling agent and high-speed mixer. The effects of nanometer carbon black amount added on viscosity of the composite binders were studied. Low carbon MgO-C specimens were fabricated with these composite binders. Effects of nanoscale carbon black contents (0, 2.5%, 5%, 10%, and 15% of phenolic resin in mass) on mechanical properties of low carbon MgO-C specimens were investigated. The results revealed that the viscosity of the composite binder increased rapidly with increase of nanometer carbon black content. Moreover, it indicated that CMOR, HMOR and CCS of the specimens rose gradually with increase of nanometer carbon black content as well.
关键词:
Black carbon;performancr;Mgo-C composite
LIU Bo
,
SUN Jialin
,
TANG Guangsheng
,
et al
钢铁研究学报(英文版)
Abstract: The low-carbon magnesia–carbon (MgO-C) composites containing 3% (mass fraction, the same below) carbon were prepared by adding various types of carbon black (CB). The mechanical properties, oxidation resistance at 1100℃ in oxidizing atmosphere, and thermal shock resistance after 5 times dipping in 1600 ℃ molten-steel of the low-carbon composite samples were investigated, compared with a commercial high-carbon MgO-C composite containing 16% carbon. The results show that the mechanical properties, oxidation resistance and thermal shock resistance of the low-carbon samples improve with the decrease of CB particle size. Thermal shock resistance of the low-carbon sample containing nanometer CB N220 is obviously better than other low -carbon samples, and reaches the level of the high-carbon samples.
关键词:
magnesia-carbon composite;low-carbon content;nanometer carbon black;thermal shock resistance;refractory
