Baffle Bricks The raw material of Baffle bricks is mullite, corundum mullite and electrocast corundum. It is used to support and strengthen the ceramic regenerative material after installed at the back of the burner of regenerative heating furnace . It is made of chrome corundum and zirconia corundum mullite. These can specifically be used in bad conditions while boasting high slag resistance and good anti-scouring.T