The raw materials of alkali resistant bricks are flint clay, pyrophyllite and silica. The alkali-resistance mechanism of alkali resistant brick is that it can react with alkali metal oxides at high temperature and produces high viscosity liquid phase, therefore, glazed protection layer is formed at the surface of alkali resistant brick, and surface open pores is blocked. Protection layer can keep alkali resistant brick from further penetration and corrosion of molten alkali metals, that’s why it is called alkali corrosion resistant brick.
Alkali resistant bricks applications
The main application field of alkali resistant bricks is cement kiln. Alkali resistant bricks used in cement kilns are classified into ordinary alkali resistant brick, high strength alkali resistant brick, arch top type alkali resistant brick, insulating alkali resistant brick, etc..
High strength alkali proof bricks are mainly used at cement kiln preheater, decomposition furnace, tertiary air duct, vertical ascending flue, cyclone cylindrical part and conic part.
Arch top type alkali resistant bricks are mainly used at cement kiln preheater, decomposition furnace tertiary air duct and so on.
Alkali resistant insulating bricks are mainly used at cement kiln discharge end, kiln hood, cooler, etc..
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