Alumina lining bricks, also known as alumina ceramic lining bricks, ball mill lining bricks, wear-resistant ceramic lining bricks, etc., have the characteristics of high hardness, high density, low wear, good regularity, and corrosion resistance. They are mainly used as wear-resistant linings in ball mills and are powerful assistants for wear and corrosion resistance.
Traditional ball mills use manganese steel material, which has certain effects, but there are also some shortcomings. The surface of high manganese steel cannot reach high hardness, so it wears quickly. At the same time, the yield limit of high manganese steel is low, and plastic deformation is prone to occur in the early stages of use. In addition, there is a hardness matching problem between the ball mill lining plate and grinding media (such as grinding balls). Currently, the hardness of low chromium cast iron and high chromium cast iron grinding balls used by many factories and mines is much higher than that of high manganese steel plates. The above shortcomings of high manganese steel under low impact load often lead to insufficient wear resistance due to excess toughness, rapid wear failure, and serious deformation, resulting in a short service life of the workpiece.
The Rockwell hardness HRA of alumina lining bricks is greater than 80. Its main raw material is alumina powder, which is then sintered at high temperature to form a texture similar to ceramics, so it is called alumina ceramics. Its production method gives it wear resistance and acid-alkali corrosion resistance. The thickness of common alumina lining bricks ranges from 40-90mm, and they are available in rectangular, trapezoidal, and irregular shapes, which can be matched according to the cylinder diameter. The thickness is mainly selected based on the size of the ball mill and material conditions.
Alumina lining bricks are widely used in industries such as chemical, ceramics, cement, and mining. They are commonly used in applications such as quartz sand grinding, kaolin grinding, and silicon micro-powder grinding. The appropriate product should be selected based on the different stresses and products in different industries.