Know "Diatomite"

Diatomaceous earth is a kind of siliceous rock, mainly distributed in China, the United States, Denmark, France, the Soviet Union, Romania and other countries. China has a diatomite reserve of 320 million tons and a long-term reserve of more than 2 billion tons. It is mainly concentrated in the eastern and northeastern regions of the country. Larger scales and more work are performed in provinces such as Jilin, Zhejiang, Yunnan, Shandong and Sichuan. Although widely available, high-quality soils are only concentrated in the Changbai area of ​​Jilin Province, and most of the other deposits are grades 3 to 4 because of high impurity content and cannot be directly processed and utilized.

Minerals Introduction

Formula: SiO2

Molecular Weight: 60.08

CAS No.: 61790-53-2 Diatomite is a siliceous rock that is mainly distributed in China, the United States, Denmark, France, the Soviet Union, and Romania. China has a diatomite reserve of 320 million tons and a long-term reserve of more than 2 billion tons. It is mainly concentrated in the eastern and northeastern regions of the country. Larger scales and more work are performed in provinces such as Jilin, Zhejiang, Yunnan, Shandong and Sichuan. Although widely available, high-quality soils are only concentrated in the Changbai diatomite mining area in Jilin Province, and the resources are excellent. Most of the other deposits are grades 3 to 4 and cannot be processed directly due to high impurity content.

Diatomite consists of amorphous SiO2 and contains a small amount of Fe2O3, CaO, MgO, Al2O3 and organic impurities. Diatomaceous earth is usually light yellow or light gray, soft, porous and light. It is commonly used in industry as insulation material, filter material, filler, abrasive material, water glass raw material, decolorizing agent and diatomaceous earth filter aid, catalyst carrier. Wait.

The special porous structure of natural diatomite can be observed under the microscope. This microporous structure is the reason why diatomite has characteristic physicochemical properties.

The main component of diatomaceous earth as a carrier is SiO2. For example, the active component of an industrial vanadium catalyst is V2O5, the promoter is an alkali metal sulfate, and the carrier is refined diatomaceous earth. Experiments show that SiO2 has a stabilizing effect on the active components and increases with increasing K2O or Na2O content. The activity of the catalyst is also related to the dispersion and pore structure of the support. After the diatomite is treated with acid, the content of oxide impurities is reduced, the content of SiO2 is increased, the specific surface area and the pore volume are also increased, so the carrier effect of the purified diatomite is better than that of natural diatomite.

Diatomaceous earth is generally formed from the remains of silicates after the death of unicellular algae, collectively referred to as diatoms, and is essentially a water-containing amorphous SiO2. Diatoms can survive in both fresh and salt water. There are many types of diatoms, which can be generally divided into the "central head" diatoms and the "feather head" diatoms. In each head, there are many "genus" and it is quite complicated.

The main component of natural diatomite is SiO2, which is white in quality, and the SiO2 content often exceeds 70%. Monolithic diatoms are colorless and transparent. The color of diatomite depends on clay minerals and organic matter, and the composition of diatoms varies from source to source.

Diatomaceous earth is a kind of fossil diatom accumulation deposit formed after a unicellular plant called diatoms has accumulated for about 1 to 20,000 years after death. Diatoms are one of the first living organisms that appeared on the earth and live in seawater or lake water. It is this diatom that provides oxygen to the earth through photosynthesis and promotes the birth of humans, animals and plants.

This diatomite is formed by the remains deposition of a single-celled aquatic plant diatom. The unique feature of this diatom is that it can absorb free silicon in water to form its skeleton, when its life is over, it is deposited under certain geological conditions. Diatomite deposits are formed. It has some unique properties, such as: porosity, lower concentration, larger specific surface area, relative incompressibility and chemical stability, through the pulverization, sorting, calcining, airflow classification, Miscellaneous and other processing steps can change the particle size distribution and surface properties, and can be applied to various industrial requirements such as paint additives.

Industrial application of diatomite fillers

Industrial application of diatomite fillers Pesticide industry: WP, dryland herbicides, herbicides for paddy fields and various biological pesticides. Application of diatomite advantages: PH value neutral, non-toxic, good suspension performance, strong adsorption capacity, light weight density, oil absorption rate of 115%, fineness of 325 mesh --- 500 mesh, good mixing uniformity, will not be used Plugging agricultural machinery pipelines can play a role in moisturizing and loosening soil in the soil and prolonging the efficiency of fertilizer effects, which contributes to the growth of crops. Compound Fertilizer Industry: Compound fertilizers for various crops such as fruit trees, vegetables, flowers and grasses. Application of diatomite: strong adsorption capacity, light weight, fine uniformity, PH neutral non-toxic, good mixing uniformity. Diatomaceous earth can be used as a high-efficiency fertilizer to promote crop growth and soil improvement. Rubber industry: fillers in various rubber products such as vehicle tires, rubber tubes, triangle belts, rubber rollers, conveyor belts, car mats, etc. Application of diatomite advantages: can significantly enhance the product's rigidity and strength, settlement volume of 95%, and can improve the product's heat resistance, wear resistance, thermal insulation, anti-aging and other chemical effects. Building insulation industry: roof insulation layer, thermal insulation brick, calcium silicate insulation material, porous coal cake furnace, sound insulation and fireproof decoration board, etc. Insulation, heat insulation, sound insulation construction materials, wall sound insulation decorative plates, floor tiles, ceramic products, etc. Application of diatomite Advantages: Diatomite should be used as an additive in cement. Adding 5% diatomaceous earth in the production of cement can increase the strength of ZMP. SiO2 in cement can become active and can act as a rescue cement. Plastics industry: Living plastic products, construction plastic products, agricultural plastics, window door plastics, various plastic pipes, other light and heavy industrial plastic products. Application of diatomite advantages: excellent extensibility, high impact strength, tensile strength, tear strength, light weight, soft internal wear, good compression strength and other aspects of quality. Paper industry: paper for office paper, industrial paper, etc.; application of diatomaceous earth Advantages: light and soft body, fineness in the range of 120 mesh to 1200 mesh, diatomaceous earth can make paper smooth, light weight, and good strength , reduce the expansion caused by humidity changes, in the *** can adjust the combustion rate, without any toxic side effects, in the filter paper can increase the clarity of the filtrate and make the filter speed. Paint and coating industry: furniture, office paints, architectural coatings, machinery, home appliances, paints, ink, leach, automotive paints and other paint coating filler; application of diatomaceous earth advantages: PH value neutral, non-toxic, fineness 120 Head to 1200 mesh, light and soft body, is a high quality filler in paint. Feed industry: Pigs, chickens, ducks, geese, fish, birds, aquatic products and other feed additives. Application of diatomite Advantages: PH neutral, non-toxic, diatomite mineral powder has a unique pore structure, light weight, soft, large porosity, strong adsorption, forming a light and soft color, can be dispersed in the feed evenly , And with the feed pellets admixed, not easy to separate precipitation, livestock and poultry after eating to promote digestion, and the bacteria can be absorbed after the animal's gastrointestinal tract excreted, enhance physical fitness, play a strong gluten bone effect, aquatic products in the fish The water quality in Tangchi became clear and breathable, improving the survival rate of aquatic products. Polishing and rubbing industry: brake pad polishing in vehicles, mechanical steel plates, wood furniture, glass, etc.; application of diatomaceous earth advantages: strong lubricating properties. Leatherette artificial leather industry: artificial leather products and other leathers. Application of diatomite Advantages: strong sun protection, soft and light, can eliminate the high-quality filler of leather pollution balloon products: light weight, PH value is neutral, non-toxic, light soft and smooth, strong strength properties, sunscreen high temperature resistance . Diatomaceous earth is used as a high-quality filler for mosquito coils, and diatomaceous earth can adsorb drugs to improve mosquito-killing effects. Application of diatomite advantages: PH value is neutral, non-toxic, light weight 0.35, powder fine should play a good mix, SiO267%, promote human health. With the improvement of people's living standards, the health awareness must be enhanced with the use of non-toxic, smoke-free mosquito coils. Diatomaceous earth can be used as a combustion-supporting, smoke-free, non-toxic, and is well received by users. Coatings, paints, sewage treatment and other industries.