Bricks in the 80% and 85% Al2O3 class were originally developed for use in
aluminum melting and holding furnaces. It is rare that they find application in other types of furnaces. These bricks are based on calcined bauxite, as it is the closest mineral in alumina content to their overall composition.
The properties of 80% and 85% Al2O3 brick are given in Table 11. The
resistance to aluminum attack is, in part, due to the resistance of the bauxite to
solution in molten aluminum and to salt fluxes that may cover the metal bath.
Generally speaking, these bricks have not been successful in ferrous foundry
or incinerator applications. The reason may be the relatively poor refractoriness
of the bond phase (glass and mullite) holding together very refractory calcined
bauxite aggregate particles. In an aggressive slagging situation, the bauxite
aggregate is eroded out of the brick, and wear rates are usually unacceptably high.
Bricks in the 80% and 85% Al2O3 class were originally developed for use in
aluminum melting and holding furnaces. It is rare that they find application in other types of furnaces. These bricks are based on calcined bauxite, as it is the closest mineral in alumina content to their overall composition.
The properties of 80% and 85% Al2O3 brick are given in Table 11. The
resistance to aluminum attack is, in part, due to the resistance of the bauxite to
solution in molten aluminum and to salt fluxes that may cover the metal bath.
Generally speaking, these bricks have not been successful in ferrous foundry
or incinerator applications. The reason may be the relatively poor refractoriness
of the bond phase (glass and mullite) holding together very refractory calcined
bauxite aggregate particles. In an aggressive slagging situation, the bauxite
aggregate is eroded out of the brick, and wear rates are usually unacceptably high.
การแปล กรุณารอสักครู่..
