Acid tile main ingredient is silica, it is formed under a high temperature roasting a large amount of mullite, which is the substance of a high acid resistance, water absorption is small due to the compact structure of acid brick, so at room temperature can also beresistance to any concentration of the alkaline medium, but intolerant of high temperature molten alkali. acid brick containing silica above 70%, by sintering, and more used in the chemical industry the puzzle acid groove, sour wells, acid storage library andupload acid impacted the ground