The diatoms in diatomaceous earth have many different shapes, such as discs, needles, cylinders, feathers and so on. The bulk density is 0.3～0.5g/cm3, the Mohs hardness is 1～1.5 (diatom bone particles are 4.5～5mm), the porosity is 80～90%, and it can absorb water 1.5～4 times its own weight. It is heat , Poor conductor of electricity and sound, melting point 1650～1750°C, high chemical stability, insoluble in any strong acid except hydrofluoric acid, but soluble in strong alkali solution.
Most of the silica of diatomaceous earth is amorphous, and the content of soluble silicic acid in alkali is 50-80%. Amorphous SiO2 becomes crystalline when heated to 800-1000°C, and the soluble silicic acid in alkali can be reduced to 20-30%. 1.5 Mineral properties Diatomite is a kind of rock with biological structure. It is mainly composed of 80-90%, and some up to more than 90% of diatom frustules. The main consumer of silicon oxide in seawater and lake water is diatoms, which constitute diatom sludge. During the diagenesis process, diatomite is formed through the petrochemical stage. Diatom shells are composed of opal. During the growth and reproduction of diatoms, it absorbs colloidal silica from water and gradually transforms into opal.
The more diatom content in diatomaceous earth, the less impurities, the whiter the color and the lighter the quality. The specific gravity is generally 0.4-0.9. Because the diatomite has many shell holes, the diatomite has a porous structure. The porosity of diatomite is 90-92%. It has strong water absorption and sticky tongue. Due to the diatom particles Small, make the diatomaceous earth fine and smooth. Diatomaceous earth is insoluble in acid (HCl, H2S04, HN03), but soluble in HF and K0H.
Diatom is a kind of single-celled algae that first appeared on the earth. It lives in sea water or lake water, and its shape is extremely small, usually only a few microns to a dozen microns. Diatoms can carry out photosynthesis and self-made organic matter. Often grow and reproduce at an alarming rate. Its remains were deposited to form diatomaceous earth. It is this diatom that provides oxygen to the earth through photosynthesis and promotes the birth of humans, animals and plants. The main component of diatomaceous earth is silicic acid. There are numerous pores on the surface, which can absorb and decompose the peculiar smell in the air, and has the functions of humidity control and deodorization. Building materials produced using diatomaceous earth as raw materials not only have the characteristics of non-combustibility, dehumidification, deodorization and good permeability, but also can purify air, sound insulation, waterproof and heat insulation.
Jilin Yuantong Mining Co., Ltd. is a professional company integrating diatomite mining, research and development, processing, and production of diatomite series products. It is the best grade and largest reserves of similar minerals in my country, and it is also the world’s current development prospect Diatomite deposits. Our company mainly produces diatomite series products such as diatomite filter aids, diatomite fillers, and diatomite catalysts. The products are reliable in quality and reasonable in price, and are well received by customers.
Post time: Sep-16-2021