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High-alumina brick for EAF roof

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high-alumina brick for EAF roof unburnt high-alumina brick for EAF roof
LDL-80 DL-80 LBDL-80 LBDL-75
AL2O3%   ≥ 80 80 80 75
refractoriness 1790 1790
0.2MPa refractoriness under load 1550 1560(T2) 1530(T2)
linear change after heating(15500C×2h)% 0~-0.3  
apparent porosity ≤ roof brick 20 19 19
skew brick 21 19
cold crushing strength MPa ≥ 78 78.5 60
thermal shock resistance (11000C-water) times 10 The test data shall be noted in the quality certificate
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