Alumina insulation bricks are treated by foam insulation, casting molding and high temperature firing. Hollow ball alumina insulating bricks are made from melt blowing alumina hollow ball with compound binding agent and shaped by vibration, high temperature firing. Both of them have small thermal conductivity, high load softening temperature, less reheating linear change, which are widely used in insulation lining work or flame contact kiln and precision thermal equipment.

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