![]() ![]() While the ordinary refractories are made by adding white sand in weight percentage (60, 65, and 70) % with 10 % of petiole to kaolinite. Light weight refractories are made to produce two types of light weight, the first type is produced by adding of (50, 70, and 90) % porcelanite to kaolinite and the second type is manufactured by adding AlF3 to kaolinite in ratios (40, and 45) %. Preliminary investigations were done to determine the chemical and mineralogical constitution of the raw materials. These are as thermal insulators used for lining furnaces in order to decrease the lining wall thickness of the furnaces according to Fourier equation in order to increase the inner space of the furnaces, where the capacity and the production of the furnace will be increased. This study was carried out to investigate the suitability of using white sand, Dwaikhla-clay kaolinite, porcelanite and ALF3 for production of light weight and ordinary refractories bricks.
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