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MULLITE BONDED HIGH ALUMINA CASTABLE USING MULLITE PRECURSOR SOL.
MULLITE BONDED HIGH ALUMINA CASTABLE USING MULLITE PRECURSOR SOL.
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机译：使用马来石前体溶胶将马来石粘结的高铝铸件。
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摘要
The present invention discloses a synergistic composition for the production of high alumina based refractory castable bonded solely with mullite precursor sol. Conventional use of silica sol in alumina castable restricts the high temperature application. Hence mullite sol is a better alternative as it is stable at much higher temperatures, like applications in iron and steel industries. Mullite sol was synthetically prepared by using chemical grade materials and the same was used in the castables with different particle size distributions (PSDs), by varying distribution coefficients as per Dinger and Funk model. Conventional processing technique of the castable was used and well sintered density and strengths were obtained at 1650°C, which temperature is much above than any conventional castables. Absence of impurity in the castables nullifies the formation of any liquid phase, as confirmed by phase analysis study of the matrix phases. Also strength values are quiet high, as high as 800 kg/cm2 was obtained, which indicates good compaction and densification in the compositions. Thus the developed castables compositions are suitable for very high temperature applications.
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机译：本发明公开了用于生产仅与莫来石前体溶胶结合的高氧化铝基耐火浇注料的协同组合物。硅溶胶在氧化铝浇铸料中的常规使用限制了高温应用。因此，莫来石溶胶是更好的替代品，因为它在更高的温度下很稳定，例如在钢铁工业中的应用。莫来石溶胶是使用化学级材料合成制备的，并且根据Dinger和Funk模型，通过改变分布系数，将其用于具有不同粒径分布（PSD）的浇铸料中。使用常规的浇铸料加工技术，并在1650°C下获得良好的烧结密度和强度，该温度远高于任何常规浇铸料。通过基质相的相分析研究证实，浇铸料中不存在杂质会使任何液相的形成无效。强度值也很安静，可以达到800kg / cm 2，这表明组合物具有良好的压实性和致密性。因此，开发的浇铸料组合物适合于非常高温的应用。
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