Classification of diatomite mud: Diatomite

Core tip: diatomite is a kind of siliceous rock, mainly distributed in China, the United States, Denmark, France, the Soviet Union, Romania and other countries It is a kind of biogenic siliceous sedimentary rock, which is mainly composed of the remains of ancient diatoms Its chemical composition is mainly SiO2, which can be expressed as SiO2 · nH2O Its mineral composition is Opal and its varieties [sup] cited by [sup] the reserves of diatomite in China are 320 million tons, and the prospective reserves are more than 2 billion tons, which are mainly concentrated in East China and Northeast China, among which Jilin, Zhejiang, Yunnan, Shandong, Sichuan and other provinces have done a lot of work, although they are distributed Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Coating home news: diatomite is a kind of siliceous rock, mainly distributed in China, the United States, Denmark, France, the Soviet Union, Romania and other countries It is a kind of biogenic siliceous sedimentary rock, which is mainly composed of the remains of ancient diatoms Its chemical composition is mainly SiO2, which can be expressed as SiO2 · nH2O Its mineral composition is Opal and its varieties [sup] cited by [sup] the reserves of diatomite in China are 320 million tons, and the prospective reserves are more than 2 billion tons, which are mainly concentrated in East China and Northeast China, of which the scale is large, and the work is done more in Jilin, Zhejiang, Yunnan, Shandong, Sichuan and other provinces, although widely distributed, but the high-quality soil is only concentrated in Jilin Changbai, Zhejiang, Yunnan, and most other deposits are grade 3-4 soil, because of the high impurity content [diatomite] 1 The raw ore contains a small amount of Al2O3, Fe2O3, Cao, MgO, K2O, Na2O, P2O5 and organic matter SiO2 usually accounts for more than 80%, up to 94% The iron oxide content of high quality diatomite is generally 1-1.5%, and the alumina content is 3-6% The mineral composition of diatomite is mainly Opal and its varieties, followed by clay mineral hydromica, kaolinite and mineral debris The mineral clasts are quartz, feldspar, biotite and organic matter The content of organic matter ranges from trace to over 30% The color of diatomite is white, gray, gray and light gray brown It has fine, loose, light, porous, water absorption and strong permeability Most of the silica in diatomite is amorphous, and the content of soluble silica in alkali is 50-80% When the amorphous SiO2 is heated to 800-1000 ° C, it becomes crystalline, and the soluble silicic acid in alkali can be reduced to 20-30% 2、 Formula: SiO2 molecular weight: 60.08 CAS No.: 61790-53-2 diatomite is a kind of siliceous rock, mainly distributed in China, the United States, Denmark, France, the Soviet Union, Romania and other diatomite countries The reserves of diatomite in China are 320 million tons, and the prospective reserves are more than 2 billion tons, which are mainly concentrated in East China and Northeast China, of which, Jilin, Zhejiang, Yunnan, Shandong, Sichuan and other provinces have done a lot of work Although they are widely distributed, the high-quality earth is only concentrated in the diatomite mining areas of Changbai and Yunnan in Jilin, especially rich in resources Most of the other deposits are grade 3-4 earth, because of the impurities High quantity, can not be directly used for deep processing Diatomite is composed of amorphous SiO2 and contains a small amount of Fe2O3, Cao, MgO, Al2O3 and organic impurities Diatomite is usually light yellow or light gray, soft, porous and light It is often used in industry as heat preservation material, filter material, filler, grinding material, water glass raw material, decolorizer, diatomite filter aid, catalyst carrier, etc The special porous structure of natural diatomite can be observed under microscope, which is the reason why diatomite has characteristic physical and chemical properties The main component of diatomite as carrier is SiO2 For example, the active component of industrial vanadium catalyst is V2O5, the cocatalyst is alkali metal sulfate, and the carrier is refined diatomite The results show that SiO2 has a stable effect on the active component, and it is strengthened with the increase of K2O or Na2O content The activity of the catalyst is also related to the dispersion and pore structure of the support After the diatomite was treated with acid, the content of oxide impurity decreased, the content of SiO2 increased, the specific surface area and pore volume also increased, so the carrier effect of refined diatomite was better than that of natural diatomite Diatomite is generally formed by silicate remains after the death of unicellular algae called diatoms Its essence is water-bearing amorphous SiO2 Diatoms can survive in both fresh and salt water There are many kinds of diatoms, which can be generally divided into "central order" and "featherline order" In each order, there are many "genera", which are quite complex The main component of natural diatomite is SiO2 The high quality diatomite is white, and the content of SiO2 is often more than 70% Single diatomite is colorless and transparent The color of diatomite depends on clay mineral and organic matter The composition of diatomite from different sources is different Diatomite is a kind of fossil diatomite deposit formed after the death of a single celled plant, which is called diatom Diatom is one of the earliest protozoa on the earth, living in the sea water or lake water This kind of diatomite is formed by the deposition of the remains of the single cell aquatic plant diatom The unique performance of this diatomite is that it can absorb the free silicon in water to form its skeleton When its life is over, the diatomite deposit will be formed under certain geological conditions It has some unique properties, such as: porosity, low concentration, large specific surface area, relative incompressibility and chemical stability It can be applied to many kinds of industrial requirements, such as coating and paint additives, after changing the particle size distribution and surface properties of raw soil through grinding, separation, calcination, air flow classification, impurity removal and other processing procedures 3、 Technical application this paper analyzes the characteristics of the water quality and quantity of the current urban sewage, and puts forward the sewage treatment technology suitable for China's national conditions The technology of treating urban sewage with diatomite is a physicochemical sewage treatment technology, and the key of the technology is the high-efficiency modified diatomite sewage treatment agent, on the basis of which the process flow and process facilities are coordinated, This technology can deal with the city efficiently, stably and cheaply But because it is a new technology, there are still some problems to be solved in theory and practical engineering application 4、 Application scope of diatomite industrial filler application scope of agricultural and pharmaceutical industry: wettable powder, dry land herbicide, paddy field herbicide and various biological pesticides Advantages of diatomite application 1: neutral pH value, non-toxic, good suspension performance, strong adsorption performance, light volume weight, oil absorption rate of 115%, fineness of 325-500 mesh, good mixing uniformity, not blocking agricultural machinery pipeline when using, can play a role of moisturizing, loosening soil, prolonging fertilizer effect time, and promoting the growth of crops Compound fertilizer industry: compound fertilizer for fruits, vegetables, flowers and plants and other crops The application of diatomite has the advantages of strong adsorption, light bulk density, uniform fineness, neutral pH value and good mixing uniformity Diatomite can be used as high efficiency fertilizer to promote the growth of crops and improve the soil Rubber industry: vehicle tires, rubber pipes, V-belts, rubber rolling, conveyor belts, car mats and other rubber products in the filler The advantage of diatomite is that it can obviously enhance the rigidity and strength of the products, and the settlement volume is up to 95% It can also improve the chemical properties of the products such as heat resistance, wear resistance, heat preservation and anti-aging Building insulation industry: roof insulation layer, insulation brick, calcium silicate insulation material, porous coal cake stove, sound insulation and fire-proof decorative board and other thermal insulation and sound insulation building materials, wall sound insulation decorative board, floor tiles, ceramic products, etc; Advantages of using diatomite 2: diatomite should be used as additive in cement, adding 5% diatomite in production cement can improve the strength ZMP, SiO2 in cement becomes active and can be used as emergency cement Plastic industry: living plastic products, building plastic products, agricultural plastic, windows and doors plastic, various plastic pipes, other light and heavy industrial plastic products The application of diatomite has three advantages: excellent extensibility, high impact strength, tensile strength, tear strength, good light and soft internal abrasiveness, good compressive strength, etc Paper industry: office paper, industrial paper and other paper; Application of diatomite advantages: light and soft, fineness in the range of 120 mesh to 1200 mesh, the addition of diatomite can make the paper smooth, light weight, good strength, reduce the expansion caused by the change of humidity, can adjust the burning rate in cigarette paper, without any toxic side effects, can improve the clarity of filtrate in filter paper, and accelerate the filtration speed Paint industry: furniture, office paint, architectural paint, machinery, home appliance paint, oil printing ink, asphalt meter, automobile paint and other paint filler; application of diatomite advantages 4: pH neutral, non-toxic, fineness 120 mesh to 1200 mesh, light and soft body, is a high-quality filler in paint Feed industry: additives for pigs, chickens, ducks, geese, fish, birds, aquatic products, etc Advantages of diatomite application: pH value is neutral and non-toxic, diatomite mineral powder has unique pore structure, light and soft weight, large porosity, strong adsorption performance, light and soft color, which can be evenly dispersed in the feed and mixed with the feed particles, which is not easy to separate and separate out, which can promote digestion after livestock and poultry eat, and can drain the bacteria from the gastrointestinal tract of livestock and poultry after absorption, and enhance the body The quality of water can strengthen the muscles and bones When aquatic products are put into the pond, the water quality becomes clear, the air permeability is good, and the survival rate of aquatic products is improved Polishing and friction industry: brake pad polishing, mechanical steel plate, wood furniture, glass, etc in vehicles; advantages of diatomite application: strong lubrication performance Leatherman-made leather industry: all kinds of leathers such as man-made leather products Advantages of diatomite application 5: strong sun protection, soft and light constitution, high-quality filler that can eliminate leather pollution of balloon products: light capacity, neutral pH value, non-toxic, light, soft and smooth powder, good strength performance, sun protection and high temperature resistance Diatomite is used in coating, paint, sewage treatment and other industries 5、 The main advantages of diatomite coating additive products, with the characteristics of large porosity, strong absorption, chemical stability, wear resistance, heat resistance, etc., can provide excellent surface performance, compatibilization, thickening and improve adhesion for the coating Because of its large pore volume, it can shorten the drying time of the film It can also reduce the amount of resin and the cost This product is considered to be a kind of high-efficiency extinction powder product with good cost performance It has been widely used in water-based diatom mud as a designated product by many large-scale coating manufacturers in the world Many new indoor and outdoor coatings and decoration materials, which are made of diatomite, are more and more popular at home and abroad It is a potential natural material for the development of diatomite indoor and outdoor coatings in China It does not contain harmful chemicals In addition to the characteristics of non combustion, sound insulation, waterproof, light weight and heat insulation, it also has dehumidification, deodorization and indoor air purification