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Vysokoglinozemistye ogneupory receive from materials (bauxite, corundum), 45% of alumina containing more. Their fire resistance depends on the alumina and technology maintenance and makes 1450-1725°С. The products made from vysokoglinozemistogo of raw materials on clay or other sheaf, possess high thermal stability at maintenance А12О3 45-60% Apply them in the glass industry, to a laying of blast furnaces, etc.
Superficial ogneupory have volume weight 1,3-0,4 гсм3 and the general porosity accordingly 45-85%. Possess high fire resistance, small heat conductivity and the sufficient durability, allowing successfully to apply them for futerovki industrial furnaces of different function. it is thus considerable (in 2-4 times) it is reduced duration of a warming up or idling of furnaces, in 2-3 times the thickness of protecting walls decreases and on 20-70% specific expenses of fuel on thermal processes are cut. In this connection manufacture superficial ogneuporov continuously extends.
For a high-temperature thermal protection of various industrial furnaces and thermal units use aljumosilikatnye and other fibres possessing high durability, thermal firmness and small heat conductivity.
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