Castable refractory rich with alumina coarse grains
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United States of America Patent
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Oct 28, 1997
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app pub date -
Oct 28, 1996
filing date -
Oct 28, 1996
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Expired
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Abstract
A castable refractory which comprises a matrix, making up 100 wt % in total, composed of 3-20 wt % of magnesia clinker having a particle diameter smaller than 0.21 mm and containing more than 95 wt % of MgO and 0.5-3.0 wt % of alumina cement in terms of CaO, with the remainder being alumina, and 0.1-3 wt % of ultrafine powder of amorphous silica and 41-100 wt % of alumina coarse grains having a particle diameter of 10-50 mm, both in terms of outer percentage of the amount of the matrix.
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