Diatomite was used as a filter aid in the 19th century. China's diatomite filter aid industry started in the 1970s. In recent years, diatomite filter aid has been widely used in medicine, chemical industry, food, environmental protection and other fields. It plays an important role in improving product quality and has a good development trend.

Porous ceramics: also known as pore functional ceramics, it is a new type of ceramic material with three-dimensional network framework, which is prepared by adding binder and pore increasing agent into the aggregate, forming and special high-temperature sintering process. Using calcined diatomite as aggregate, the diatomite porous ceramic membrane was prepared by tape casting method. By changing the hot pressing temperature (20-90 ℃) to adjust the thickness of the ceramic membrane (0.6-1.3mm), the pore size distribution range of the ceramic membrane was 0.1-1.0 μ m. The porosity is 44% and the mechanical strength reaches 57MPa, which meets the pressure conditions for using as a filter membrane.

Adsorption materials: the adsorption materials prepared by the interface between diatomite and adsorbate are widely used in the field of environmental protection. They are made into waste water treatment agents to remove various organic dye molecules, heavy metal ions, polluted oils, enzymes, landfill leachate and other organic waste water in the water body, improve the water quality, and adsorb and intercept flocculent particle pollutants in the water body; It can also be made into fungicides, deodorants and various coatings to remove gaseous organic pollutants, purify indoor and outdoor gases and reduce air haze.

Catalytic support: diatomite is a natural excellent support material. Loading the catalyst on the surface of diatomite and using the porosity and high specific surface area of diatomite can not only enhance the dispersion performance of the catalyst, but also expose more catalytic active center sites of the catalyst, increase the contact probability and area between active components and reactants, and improve the utilization efficiency of the catalyst.