Diatomite is mainly used as filter aid, filler, adsorbent, catalytic carrier, environmental protection building materials, etc.

1. Filter aid

The important use of diatomite is as a filter aid. The main application fields are beer industry, pharmaceutical industry, water purification filtration, oil industry, mailing solution, coating and dye, fertilizer, acid, alkali, seasoning, sugar, alcohol and other filtration.

Diatomite filter aid can be divided into dry products, roasted products and fused roasted products according to the production process. The dried product is made of diatomaceous earth after beneficiation, drying under 800 ° C and grading, and the code is GZ; The roasting grade is obtained by beneficiation, drying, roasting at 800-1200 ℃ and grading, and the code is PZ; The flux roasted products are prepared by beneficiation, drying, roasting at 800-1200 and grading, and the code is ZZ. Due to the different processing conditions, the dried products in the three categories have relatively fine particle size, the lowest filtration speed, but high filtration quality; Roasted products are in the middle; The particle size of the calcined products is relatively coarse and the filtration speed is fast, but the filtration quality is poor. At present, the amount of dry products is very small, and the roasted products and flux roasted products are mainly used, and the two are usually used together.

2. Packing

The second major use of diatomite is as functional filler, which is mainly used in coatings, plastics, rubber, medicine, paper making, abrasive, precision casting and microporous ceramics. Diatomite as filler of paint coating can improve the stability, elasticity and dispersion of products, and improve the strength, wear resistance and acid resistance of products. As a functional filler, diatomite can also play the role of extinction. If diatomite is added to the silicone rubber, the oil resistance and heat resistance of the rubber can be enhanced, and the processing performance can be improved.

Using diatomite as filler to produce paperboard can save 20% of pulp, not only reduce the production cost, but also improve the cleanliness and strength of paperboard.

The high-quality diatomite is filled into the automobile brake lining and the asbestos friction plate used in the mechanical industry. It is easy to combine with resin and other materials, and has a special combination with rubber oil. It has both filling and reinforcing functions, and can overcome the thermal degradation performance of the product and enhance the adaptability of the product.

Diatomite itself has a large number of micropores, so it is a good filler for preparing microporous ceramic membrane tubes. Some people have successfully developed diatomite microporous ceramic membrane tube with high-quality selected diatomite as filler.

3. Adsorbent

The adsorption of diatomite is mainly physical adsorption, with fast adsorption rate and strong adsorption capacity. It is mainly used for urban sewage, papermaking wastewater, printing and dyeing wastewater, slaughter wastewater, oily wastewater and heavy metal wastewater. The application of diatomite as adsorbent is similar to that of filter aid. When it is used for food adsorption and refining, it is required to meet the hygienic standard.

4. Catalytic support

Diatomite has suitable specific surface area, high porosity, wear resistance, acid resistance, heat resistance and other characteristics. It has become an ideal carrier for catalysts, used for oxidation, hydrogenation, dehydrogenation, hydration, reduction and other reactions.

The antibacterial agent using diatomite as the carrier of antibacterial agent is a long-acting antibacterial agent because of the strong adsorption capacity of diatomite, and the antibacterial solution is absorbed into the micropores of diatomite and released slowly. For the antibacterial agent with diatomite as carrier, the bacteriostatic ring is basically the same as that of 2D for 40d, but the bacteriostatic ring is obviously smaller without diatomite as carrier.

5. Environmental protection building materials

After entering the 21st century, people pay more and more attention to environmental protection. This environmental awareness is not only reflected in the natural environment, but also in the living room. In order to meet the needs of people, diatom mud ecological wall material came into being. Because of its special structure, diatomite has become an excellent material for diatom mud ecological wall material. The wall material produced by diatomite has the characteristics of super fiber and porous, and its ultra-fine pores are 5000 to 6000 times more than that of activated carbon. When the indoor humidity rises, the ultra-fine pores on the diatomite wall material can automatically absorb the moisture in the air and store it. If the moisture in the indoor air decreases and the humidity decreases, the diatomite wall material can release the moisture stored in the ultra-fine pores. Secondly, the diatom mud ecological wall material also has the function of eliminating odor and keeping the room clean. Used in the toilets of families and hotels, it can remove odor gases such as hydrogen sulfide and ammonia, kill harmful bacteria, and prevent the spread of diseases. When used in the automobile room, it can remove the harmful gas emitted by the decoration products in the automobile, and also remove the smell of body odor, oil, smoke or vomiting due to carsickness.