摘要
焦炉蓄热室格子砖的破损与其中Fe2O3、K2O等杂质含量过高有关,半硅砖用后组成分析结果表明,其砖中的Fe2O3、K2O增加幅度比黏土砖小。用后黏土质和半硅质格子砖的主要组成包括高岭石、玻璃相、莫来石相以及以镁铝钛铁氧化物为主的析出相。基质相及析出相中Fe2O3含量高,K2O在高岭石相中的固熔降低了格子砖的熔点并使砖的性能劣化。Fe2O3与CO在蓄热室换热加热的循环过程中与格子砖发生的反复的氧化还原反应,推测是引起格子砖体积过度膨胀变形的原因。因此,提高砖的质量、减少杂质含量,有利于提高蓄热室的使用寿命。
The breakage of checker brick in regenerator of the coke oven is associated with high content of impurities such as Fe2O3,K2O and so and.The used semi-silica brick composition analysis showed that the increasing amplitude of Fe2O3 and K2O are lower than fireclay brick.The main compositions of the used fireclay brick and semi-silica checker brick are kaoline,glasses phase,mullite and magnesium aluminum titanium iron oxide based precipitation phase.The Fe2O3 content in matrix phase and precipitation phase is high.The solid solution of K2O with kaoline phase reduces the melting point of check brick and the brick performance.Fe2O3 and CO undergo repeated oxidation-reduction reactions with checker bricks during the heat exchange and heating cycle of the regenerator,which is presumably the cause of excessive expansion and deformation of the volume of checker bricks.Therefore,improving the quality of bricks and reducing the impurity content are beneficial to prolonging the service life of the regenerator.
作者
徐国涛
盛军波
杨帆
王大春
冯强
刘黎
张洪雷
Xu Guotao;Sheng Junbo;Yang Fan;Wang Dachun;Feng Qiang;Liu Li;Zhang Honglei(Baosteal Central Research Institute,Wuhan 430080,China;Wuhan Pingmei-Wugang Joint Coking Co.,Ltd.,Wuhan 430080,China)
出处
《耐火与石灰》
2019年第6期14-17,20,共5页
Refractories & Lime
关键词
焦炉
蓄热室
格子砖
黏土砖
半硅砖
耐火材料
Coke oven
Regenerator
Check brick
Fireclay
Semi-silica brick
Refractory
