REFRACTORY CASTABLES WITH HYDROPHOBIC AGGREGATES
    35.
    发明公开
    REFRACTORY CASTABLES WITH HYDROPHOBIC AGGREGATES 审中-公开
    FEUERFESTE GUSSMASSEN MIT HYDROPHOBEN AGGREGATEN

    公开(公告)号:EP2996998A1

    公开(公告)日:2016-03-23

    申请号:EP14797893.6

    申请日:2014-05-16

    摘要: Hydrophobic aggregates for use in refractory castables and gunning mixtures and methods of their preparation. The aggregates here are formed by crushing insulating fire brick and coating the resulting particles with a hydrophobic component. The hydrophobic component may be a polydimethylsiloxane having a terminal silanol group. As a result of the coating process, the coated aggregate has very low levels of alkalis. The aggregates may be used to form refractory castables that do not undergo substantial alkaline hydrolysis due to the reduced levels of alkalis. The castables made from these aggregates display superior physical properties, including lower water content, lower permanent linear change, high strength, and superior thermal conductivity/insulation properties, while at the same time possessing lower density and requiring less water to be used during castable formation. These improved properties also are observed in gunning mixtures formed from these aggregates.

    摘要翻译: 用于耐火浇注料和喷射混合物的疏水聚集体及其制备方法。 这里的聚集体通过破碎绝缘火砖并用疏水组分涂覆所得颗粒而形成。 疏水组分可以是具有末端硅烷醇基团的聚二甲基硅氧烷。 作为涂覆工艺的结果,涂覆的聚集体具有非常低的碱浓度。 聚集体可用于形成由于碱的水平降低而不经历基本碱性水解的耐火浇注料。 由这些聚集体制成的浇注料显示出优异的物理性能,包括较低的水含量,较低的永久线性变化,高强度和优异的导热性/绝缘性能,同时具有较低的密度并且在浇铸成形期间需要较少的水 。 在由这些聚集体形成的喷射混合物中也观察到这些改进的性质。