A 60-meter long rotary kiln for the production of low sodium and high temperature alumina.High temperature aluminum oxide powder is made of aluminum oxide powder and aluminum hydroxide powder by calcination in high temperature rotary kiln;The kiln length and low speed greatly increase the holding time. Special additives are added to reduce the impurity content, improve the alpha conversion and control the irregular change of primary crystal.High temperature alumina micro powder is made by grinding and grading high temperature alumina powder through high aluminum ball mill.

Low sodium high temperature alumina has the advantages of high alpha phase conversion, low sodium content, high purity, stable thermal properties, low shrinkage, high porcelain density, good electrical insulation and high thermal conductivity.It is suitable for producing more than 92% corundum and ceramic products, especially more than 95% alumina porcelain.

Low sodium high temperature alumina application:

1. Electronic vacuum tube shell, spark plug and other electronic ceramics.

2. Wear resistant ceramics such as papermaking machinery, sealing ring, textile machinery, etc.

3. Alumina crucible, porcelain tube and other high-temperature materials.

4. High frequency insulating porcelain, LCD substrate glass, ceramic glaze, etc.

According to the size of primary crystal, it can be divided into microcrystalline series and mesocrystalline series

Low Sodium Microcrystalline series index

Including: Primary crystal < 1.0μm

                                1.0μm < Primary crystal < 1.5μm

                               1.5μm < Primary crystal < 2.0μm

Low Sodium Mesocrystalline series index

Including: 2.0μm < Primary crystal < 3.0μm

                 3.0μm < Primary crystal < 4.0μm

                 4.0μm < Primary crystal < 5.0μm