he application of diatomite mainly includes:

(1) The microporous structure was used to prepare various filter aid materials and catalyst supports. This is one of the main uses of diatomite. It makes full use of the microstructure of diatomite. However, diatomite rich in Scenedesmus is better as a filter aid, while diatomite with linear algae structure as a catalyst carrier is better, because linear algae have a very large inner surface.

(2) Prepare insulating refractory materials. Among the insulation materials below 900 ℃, diatomite insulating refractory brick is the most ideal choice, which is also one of the main application fields of diatomite ore in China.

(3) Diatomite can be used as the main raw material source of activated SiO2. Because SiO2 in diatomite is amorphous, it has high reactivity. For example, it is very ideal to use it to react with calcareous raw materials to prepare calcium silicate board fireproof materials. Of course, for low-grade diatomite ore, some impurities should be removed.

(4) Antibacterial and anti mildew agents were prepared by using its microporous adsorption characteristics. This is also one of the new important applications of diatomite, which is a functional material with ecological effects. Generally, the length of bacilli is 1-5um, the diameter of cocci is 0.5-2um, and the pore diameter of diatomite is 0.5um. Therefore, the filter element made of diatomite can remove bacteria. If antibacterial agent and photosensitizer are attached to the diatomite filter element, the sterilization effect will be better, and the antibacterial agent can be prepared and added to other materials to achieve the purpose of slow-release and long-term effect. Now, people can use high-tech means to prepare more efficient diatomite type anti mildew and antibacterial functional materials with diatomite as the carrier.

(5) Diatomite is used to make micro hollow glass. It is said that Shanghai silicon Institute has successfully developed in the laboratory, and it is expected to be used as a new molecular sieve material in the future high-tech field.

(6) Diatomite has good adsorption for some toxic and radioactive elements, and can be used to treat industrial toxic wastewater and nuclear waste, such as adsorption of cd2+, pb2+, hg2+, 89 sr2+.

(7) In agriculture, diatomite can be treated with nutrition, and can also be used as a cushion for crop cultivation, a pesticide carrier and an insecticide in grain storage. Especially in the prevention and control of stored grain pests, diatomite has been successfully applied in foreign countries for a long time, with good effect. It is non-toxic and harmless to people, with low cost. It is a natural insecticide. In fact, as early as 4000 years ago, our ancestors knew that this natural raw material had the effect of insect prevention. By adding this raw material to the grain reserve, they can keep the grain stored for a long time without deterioration, that is, diatomite itself has the efficacy of killing insects and antibacterial. China has been developing and researching as a major science and technology project.

In short, with the continuous research and development of diatomite purification and calcination technology, its potential application value will continue to be explored.