蛭石

The vermiculite has heat resistance, freezing resistance, antiseptic, antibacterial, deodorizing, fire-proof, water absorption, excellent sound absorption and other properties. The raw vermiculite can be expanded 4-15 times in 800-1000 ° calcination, the color becomes golden or silver. As the vermiculite do not contain asbestos, and the effect of insulation, heat insulation is excellent, so it plays a very important role in some product application.It is mainly used applied in soil improvement,soilless cultivation,building engineering,roof heat preservation,feed additive,damping sound insulation,thermal-insulation brick,thermal-insulation material,fire-proof gypsum board, frictional sheet,brake pad,sealing pad,thermal-preservation bag,rubber damping and sound absorption board,heat-preservation paint,fire-proof coating with steel structure,rust-proof paint,poisonous substance adsorption,printing ink,special chemicals and other fields.The chemical composition of vermiculitecompositionSiO2Al2O3MgOFe2O3CaOPHH2OContent(%)37-429-1711-235-180.5-0.88-110.8The physical properties of vermiculiteDensityLoose capacityHardnessMelting pointCompressive strengthRefraction limitAbsorption rateFrost ResistanceAntimicrobialCorrosion resistanceKg/m3Kg/m3 °cMpaNg=1.525-1.561%220-2801100-12001-1.51320-1370100-150Ng=1.545-1.581< 2goodgoodalkaliproofThe Size Of VermiculiteExpanded Golden Vermiculite (Unit:Mesh)4,6,8,12,20,40,60,100,325,800,1250.Expanded Silver Vermiculite (Unit:Mesh)4,6,8,12,20,40,60,100,325,800,1250.Raw Vermiculite (Unit:MM)0.3-1,0.25-0.71,1-2,1.5-3.5,2-4,3-8,4-8.THE EFFECTS OF VERMICULITEType of industryApplicationEnergy, introduction of district heating system and refrigerating industry:1. light vermiculite, vermiculite-concrete and other materials • coatings and fashion materials for the thermal isolation of boilers,heating mains and other power constructions at the 900-1100 °cCar industry:1.brake-shoes with vermiculite coveringAgriculture1.horticulture,soil improvement,fertilizer carrier,hydroponics,annimal feedstuffsChemical and varnish-dye industry:1. inflation of thermal and light stable varnishes 2. inflation of acid-proof fluid reagents for their absorption at the integrity-breaching plates 3. component of the rubbing covers of high temperature oilsMetallurgy:1. covering at the pouring out steel for the increasing of qualitative rolling 1-1,5%; high temperature isolationShip-building and energymechanical engineering:1. vermiculite plates for the isolation of combustible covers 2. manufacturing of incombustible constructionsWoodcotton industry:1.woodshaving and woodfibre plates with vermiculite covering for the fire resistance and decoration