Raw mixture to obtain granular heat insulating material
SUBSTANCE: raw mixture to obtain a granular insulation material contains, by wt %: microsilica 33.5-45, ash and slag mixture 3.0-14.5, apatite-nepheline ore tailings 25-30, sodium hydroxide (in Na2O equivalent) 22-27, ammonium bicarbonate 0.5-1.5. The invention is evolved in dependent claims.
EFFECT: improvement of strength of granular insulation material while reducing its water absorption, utilization of man-made waste.
4 cl, 1 tbl
The invention relates to the composition of the raw mix for the production of building materials, particularly porous artificial products, and can be used in the manufacture of granulated insulating material and very lightweight aggregate for concrete in industrial and civil construction.
In the manufacture of construction products increasingly widespread technogenic raw materials in the form of silica-containing industrial waste mining and metallurgical enterprises. One of the promising areas of application of microsilica is a heat insulating materials using liquid compositions. Thermo insulating materials based on liquid glass are of considerable interest given the current shortage of cement binder, and technologies of their production is simple and does not involve large capital investments. However, the use of technogenic raw materials can not get enough of high performance insulation materials.
Well-known raw material mixture to obtain a granulated insulating material (see P. Gorlov Technology thermal insulation and acoustic materials and products. - M.: Higher school, 1989. - S-180)containing the following components, mA is.%: liquid glass density 1.4-1.45 g/cm 3- 93-95%, fine filler with a specific surface area of 0.2-0.3 m2/g (ash TPP) - 7-5% and gidrofobiziruyuschey additive is a silicone liquid (NGL-94, NGL-10, NGL-11) 0,5-1%). When preparing the raw material mixture is mixed until smooth, serve in droplet form in a solution of calcium chloride with the temperature of 22-30°C and incubated for 40 minutes to form pellets. The obtained raw granules are dried at 85-90°C for 10-20 minutes and then vspuchivajut at 300-450°C for 1-3 minutes. The obtained granulated material steklopor has a strength of 1 to 7 kgf/cm2and high water absorption.
The disadvantages of this raw material mixture are low strength and water resistance of the obtained granulated insulating material. The use of a solution of calcium chloride in the formation of granules of the raw mixture causes corrosion of the equipment used.
Also known raw material mixture to obtain a granulated insulating material (see U.S. Pat. 2452704 of the Russian Federation, IPC C04B 12/04 (2006.01), 2012), including, wt.%: sodium hydroxide - 2-40, waste beneficiation of Apatite-nepheline ore 0,9-10, sand sand - 49-96, silica-containing component is rest. Waste beneficiation of Apatite-nepheline ore contains, wt%: nepheline - 84, feldspar 12, aegirine - 4, hydromica - up to 3, and the other is their impurities. As the silica component used siliceous rock Tripoli. When preparing the raw material mixture is stirred, subjected to spray drying in a counter-current flow of incoming and outgoing air with a temperature of 380 and 115°C, respectively, with the receipt of raw granulate. The last stand for 15 hours and vspuchivajut at a temperature of 630-650°C. the Obtained granulated material had a bulk density 95-130 kg/m3the strength 9-10 kgf/cm2and water absorption ≤5%.
The disadvantages of the known raw mix are low strength heat-insulating material, and a limited number of man-made waste.
The present invention is directed to the achievement of the technical result consists in increasing the strength of the granulated insulating material, ensuring its low water absorption. In addition, the technical result is to expand the resource base and environmental improvement through the use of a larger number of man-made components.
The technical result is achieved by the fact that the raw material mixture to obtain a granular thermal insulating material comprising silica-containing component, the waste beneficiation of Apatite-nepheline ore and sodium hydroxide, according to the invention, the complement is Ino contains ash and slag mixture and ammonium bicarbonate, and as the silica component - fume, in the following ratio, wt.%:
|waste beneficiation of Apatite-nepheline ore||25-30|
|sodium hydroxide (in terms of Na2O)||22-27|
|bicarbonate ammonium||0.5 to 1.5|
On the technical achievement of the aims that the microsilica has a composition, wt.%: SiO292,84-93,04, TiO20,47-0,98, Fe2O30,76-1,93, Al2O3of 0.25 to 0.74, Cao 0,59-0,88, K2O 0,23-1,2, MnO 0.04 To 0,30, CuO 0,13-0,26, loss on ignition - the rest.
On the achievement of the technical result is also aimed that ash and slag mixture has a composition, wt.%: SiO252,48-53,44, TiO21,08-1,23, Fe2O313,44-13,74, FeO 1,03-1,93, Al2O317,57-of 18.45, Cao 2,43-2,47, K2O 1,30-1.55V, loss on ignition - the rest.
On the achievement of the technical result is also aimed that the waste beneficiation of Apatite-nepheline ore has a composition, wt.%: SiO235,10-35,98, TiO24,43-4,98, (Fe2O3+FeO) 7,00-12,22, Al2O316,45-16,61, Cao 8,92-9,13, MgO 1,07-1,25, P2O54,05-4,11, Na2O 9,13-10,77, K2O 4,59-of 5.05.
The essential features of the claimed invention, defining the scope of legal protection and sufficient to obtain the above-mentioned technical result function and correlate with the results as follows.
The introduction of modifying additives in the form of ash and slag mixture in the composition of the mixture to obtain a granular insulating material in a quantity 3-14,5 wt.% due to the fact that the presence of such additives leads to the formation of a larger number of closed pores with more durable interporous partitions. This contributes to reducing water absorption and increase the compressive strength. The ash content of the mixture is less than 3 wt.% does not allow to achieve the required strength of the material. When the content of the additive more than 14.5 wt.% increases the viscosity and decreases the ductility of the liquid composition, which leads to an increase in density and poor thermal conductivity of a granular material.
Introduction the composition of the charge ammonium bicarbonate in the amount of 0.5-1.5 wt.% due to the fact that it performs the function of baking powder and can increase bloating granules. It is preferable to use ammonium bicarbonate brand "chemically pure". When the content of ammonium bicarbonate less than 0.5 the AC.% the material is not enough bubbled, that leads to deterioration of thermal conductivity. The content of additives ammonium more than 1.5 wt.% leads to loss of strength of granular material.
Use in the blend of silica fume due to the fact that on the basis of the prepared liquid composition to obtain a granulated material. When the content of silica fume less 33.5 wt.% the result is a material with a lower strength and water resistance. The content of microsilica more than 45 wt.% leads to excessive increase in the density of the liquid composition and complicates the granulation of the material.
Use in the blend waste beneficiation of Apatite-nepheline ore due to the fact that the nepheline-containing wastes are effectively modifying additive that improves the strength characteristics of heat-insulating material. The use of waste beneficiation of Apatite-nepheline ore in quantities of less than 25 wt.% reduce the strength of the granulated insulating material, and the use of nepheline waste in quantities greater than 30 wt.% leads to a decrease of plasticity liquid composition and consequently to a deterioration of distension of the granules, the increase in average and bulk density and lower thermal conductivity of the granular material.
Sodium hydroxide is an alkaline component and use isoamsa in the blend together with silica fume for the preparation of liquid compositions. It meets the requirements of GOST 2263-79 and can be used in aqueous solution in various concentrations, preferably 45% aqueous solution. In the blend sodium hydroxide NaOH contained in the number 22-27 wt.% in terms of Na2O. the Content of sodium hydroxide is less than 22 wt.% leads to a decrease in the viscosity of the liquid-glass composition, and the content of more than 27 wt.% it leads to excessive density, which negatively affects the formation of granules.
The combination of the above features is necessary and sufficient to achieve the technical result of the invention to increase the strength of the granulated insulating material, ensuring its low water absorption, as well as expanding the resource base and improve the environment.
In some cases, of the preferred embodiment of the invention anthropogenic components of the raw material mixture of the following composition.
The silica fume is a waste acid processing of nepheline in OJSC "Apatit" and has the following chemical composition, wt.%: SiO292,84-93,04, TiO20,47-0,98, Fe2O30,76-1,93, Al2O3of 0.25 to 0.74, Cao 0,59-0,88, K2O 0,23-1,2, MnO 0.04 To 0,30, CuO 0,13-0,26, loss on ignition - the rest. Microsilica is a fine light gray powder with a specific surface area 1,72-2,37 m2/g, bulk raft the awn 256-287 kg/m 3and the true density of 2.0-2.17 g/cm3.
Ash mixture is a waste of Apatity CHP. The mixture has a chemical composition, wt.%: SiO252,48-53,44, TiO21,08-1,23, Fe2O313,44-13,74, FeO 1,03-1,93, Al2O317,57-of 18.45, Cao 2,43-2,47, K2O 1,30-1.55V, loss on ignition - the rest. The average specific surface area of the mixture is 0.4 m2/year of Introduction of ash-slag mixture in the charge composition for insulating material leads to an increase in the intensity of the reflexes of silica and compounds of the type aluminosilicates. This can be interpreted as the increase in the content of SiO2in the system of sodium silicate of Na2O·nSiO2and the formation of insoluble aluminosilicate tumors. The introduction of the admixture increases the number of links Si-O-Al-O in the structure of high modulus of liquid glass from silica fume, as well as the emergence of similar linkages due to ion substitution of silicon by aluminum ion. The crystalline phase is represented mainly by cristobalite and quartz.
Waste flotation of Apatite-nepheline ores by JSC "Apatit" has the following chemical composition, wt.%: SiO235,10-35,98, TiO24,43-4,98, (Fe2O3+FeO) 7,00-12,22, Al2O316,45-16,61, Cao 8,92-9,13, MgO 1,07-1,25, P2O54,05-4,11, Na2O 9,13-10,77, K2O 4,59-of 5.05.
The middle portion is Naya surface waste enrichment equal to 0.19 m 2/year of Waste beneficiation of Apatite-nepheline ore contains up to 61,1 wt.% nepheline and their functional properties are not inferior nepheline concentrate. Except nepheline main components of the waste are also aegirine and secondary minerals in nepheline, the content of which is, respectively, wt.%: 10,2-13,0 and 7.5 to 10.2. Secondary minerals are feldspar and Apatite, the content of which is, wt.%: 5.8 to 7.4 and 3,4-5,4.
The above private features of the invention allow to obtain the optimal composition of the raw mix on the basis of technogenic waste while providing a high-strength granular insulating material and low water absorption.
In General, obtaining the raw material mixture according to the invention is as follows. First, cook the mixture by dosing in the specified quantities of its components: microsilica, fly ash mixtures, waste beneficiation of Apatite-nepheline ore, 45% solution of sodium hydroxide and ammonium bicarbonate with the addition of water and stirring for 1.5-3 minutes until a homogeneous suspension. Further hydrothermal treatment at a temperature of 90-95°C and atmospheric pressure for 20-25 minutes. The obtained liquid composition is subjected to granulation plate granulator. Formed syrc the new pellets after drying at room temperature for 6-8 hours optivault silica fume and treated at a temperature of 300-450°C for 20-30 minutes with the swelling of the granules. Then the granules are subjected to intermittent firing at 800-900°C for 1-3 minutes. In the end you get a granular insulating material with a particle size of granules 4-16 mm
The nature and advantages of the claimed raw material mixture to obtain a granulated insulating material can be illustrated by Examples 1-6 of specific performance. The compositions of the raw material mixture to obtain a granular thermal insulating material according to Examples 1-6 and main characteristics of the obtained insulating material shown in the Table.
From the Table it is seen that the proposed raw material mixture to obtain a granular insulating material in comparison with the prototype allows to obtain a material with a higher (2.2-3.3 times) strength and comparable water absorption (≤5%). Use as components of the raw material mixture, a larger number of technogenic wastes allows you to expand the resource base and improve the environment. Granular insulation material from the proposed raw material mixture can be obtained industrially by using standard construction equipment.
|Example No.||Comp is the components of the raw mix||Specifications material|
|micro-silica||Solola uniform mixture||waste beneficiation of Apatite-nepheline-howl ore||sodium hydroxide||dougle acid ammonium||bulk density, kg/m3||strength, kgf/cm2||water absorption, %|
|fraction of granules|
1. The raw material mixture to obtain a granular thermal insulating material comprising silica-containing component, the waste beneficiation of Apatite-nepheline ore and sodium hydroxide, characterized in that it further comprises ash and slag mixture and ammonium bicarbonate, and as the silica component - fume, in the following ratio, wt.%:
|waste beneficiation of Apatite-nepheline ore||25-30|
|sodium hydroxide (in terms of Na2O)||22-27|
|bicarbonate ammonium||0.5 to 1.5|
2. Raw mixture according to claim 1, characterized in that the silica fume has a composition, wt.%: SiO292,84-93,04, TiO20,47-0,98 Fe 2O30,76-1,93, Al2O3of 0.25 to 0.74, Cao 0,59-0,88, K2O 0,23-1,2, MnO 0.04 To 0,30, CuO 0,13-0,26, loss on ignition - the rest.
3. Raw mixture according to claim 1, characterized in that the ash-slag mixture has a composition, wt.%: SiO252,48-53,44, TiO21,08-1,23, Fe2O313,44-13,74, FeO 1,03-1,93, Al2O317,57-of 18.45, Cao 2,43-2,47, K2O 1,30-1.55V, loss on ignition - the rest.
4. Raw mixture according to claim 1, characterized in that the waste beneficiation of Apatite-nepheline ore has a composition, wt.%: SiO235,10-35,98, TiO24,43-4,98, (Fe2O3+FeO) 7,00-12,22, Al2O316,45-16,61, Cao 8,92-9,13, MgO 1,07-1,25, P2O54,05-4,11, Na2O 9,13-10,77, K2O 4,59-of 5.05.
SUBSTANCE: composition of a haydite-concrete mixture includes, wt %: portland cement 18.87-21.34, haydite 41.13-41.56, superplasticiser LSTM 0.0312, fly ash of TPP 13.92-18.87, gasifying additive PAK-3 0.022-0.025, water - balance.
EFFECT: production of haydite concrete with higher strength and reduced density.
SUBSTANCE: invention relates to structural materials and specifically to compositions for producing foam concrete and articles based thereon, which can be used in industrial and civil engineering. The crude mixture for producing foam concrete contains, wt %: portland cement 8.9-10.5, unslaked lime 41.4-43.8, process additives - dry wastes from cutting foam concrete blocks, aluminium powder and a surfactant - superplasticiser Relamix PK 8.97-9.8, multilayer carbon nanotubes, the surface of which is chemically functionalised with oxygen-containing groups 0.0003-0.03, water 35.881-40.7297, wherein said nanotubes are added to the surfactant - superplasticiser Relamix PK, followed by ultrasonic treatment of the obtained suspension with said nanotubes. The invention is developed in subclaims.
EFFECT: obtaining foam concrete with improved strength and heat-insulation properties.
3 cl, 2 dwg, 1 tbl, 1 ex
SUBSTANCE: invention relates to the construction industry and can be used to make autoclave-cured heat insulation, structural-heat insulation and structural articles. The crude mixture for making autoclave-cured cellular articles contains, wt %: high-calcium lump quicklime 5-12, portland cement 7-14, ground quartz sand 38-51, aluminium paste 0.03-0.12, binder consisting of pre-slaked lime with an additive of ground gypsum dihydrate in amount of 0.05-0.25% (with respect to the hemihydrate) 15-25%, water (more than 100% dry components) in an amount which corresponds to the water/solid (W/S) ratio of 0.5-0.6.
EFFECT: high quality of structural materials with a cellular structure, low water consumption in the crude mixture, shorter time for ageing the raw material before autoclave treatment.
1 ex, 2 tbl, 2 dwg
SUBSTANCE: composition of a crude mixture for making naturally hardening, non-autoclaved foamed concrete contains, wt %: portland cement 63.03-66.06, synthetic foaming agent 0.15-0.21, gasifier containing 80% active aluminium with particle size not greater than 100 nm and 20% polyethylene glycol, 0.68-0.74, water 33.04-36.07. The composition further contains a modifying nanocrystalline additive- corundum in amount of 0.02-0.3 wt % of the weight of portland cement. The method of producing the composition according to claim 1 involves feeding and stirring in a mixer, first the foaming agent with a portion of water and portland cement and then a suspension of said gasifier and a portion of water into the obtained mass while stirring. The modifying nanocrystalline additive - corundum in amount of 0.02-0.3 wt % of the weight of portland cement then added to said suspension.
EFFECT: high strength with low density and heat conductivity, obtaining foamed concrete with an optimised pore structure.
4 cl, 2 ex, 7 tbl
SUBSTANCE: invention relates to production of building material and can be applied in production of artificial porous fillers for light concretes and heat-insulating fillings. Raw material mixture for obtaining porous filler includes silica-containing rock and gas-former, as gas-former, it contains mixture of aluminium oxide and silicon carbide with the following component ratio, wt %: silica-containing rock - 95.0-96.0, aluminium oxide 3.0-4.9, silicon carbide 0.1-1.0.
EFFECT: increase of porous filler strength by reduction of filler agglomeration with reduction of its water-absorption and heat-conduction.
4 ex, 1 tbl
SUBSTANCE: raw mix for preparation of frost resistant wall building stones and monolithic walls, including a binder, a filler - an ash and slag mixture, a foaming agent, a chemical additive - Relamix. Type 2, calcium carbide, the binder used is represented by the following components jointly ground to the size of less than 250 m2/kg: an ash and slag mix from burning of coal in furnaces of a boiler house or a thermal power plant cooled by dry method, a hardening activator - alkaline reagents of sodium or potassium, or carbonates of these metals or lime or mixtures of the specified reagents, and calcium sulfate dihydrate, and the filler is an ash and slag mixture from burning of coal in furnaces of a boiler house or a thermal power plant, cooled by the dry method, and clay, and additionally the mixture contains spent engine oil, at the following ratio of components, wt %: specified ash and slag mixture for a binder 14-19, specified activator of hardening 3-6, specified calcium sulfate dihydrate 4-6, foaming agent 0.3-0.6, Relamix. Type 2 0.1-0.2, calcium carbide 0.5-4.0, clay 5-10, spent engine oil 0.2-0.4, specified ash and slag filler - balance.
EFFECT: improved frost resistance of products from the proposed mix.
1 ex, 1 tbl
SUBSTANCE: raw mix contains the following components, wt %: argillites - 69.0-74.8; diopside-containing rock - 10-15; crushed glass - 9.5-10.5; building gypsum - 4.92-5.1; alumnium powder - 0.58-0.6; sodium hydroxide, 2H solution - 29.6-30.0% above 100%, of dry mixture, V/G - 0.42-0.45.
EFFECT: increased strength of porous items with preservation of their density and temperature of annealing.
SUBSTANCE: raw mix for fabrication of gas concrete includes the following components, wt %: portland cement 140 - 150, lime 140 - 150, marshalite 480 - 520, gypsum 0.5 -1, aluminium powder 2.5 - 3, superplasticiser S-3 0.3 - 0.5, water 480 -520.
EFFECT: reduced time of autoclave treatment, increased strength of products from gas concrete.
SUBSTANCE: invention relates to production of heat-insulating foamed building materials. Finely ground rock is mixed with mineral binder, correction additives, a foaming agent and water. The rock used is gaize, the mineral binder is slag-portland cement, the stabilising additive is a mixture of polyacrylamide gel and carbamide-formaldehyde liquid, taken in ratio of 1:1, and the fluxing agent is low-melting frit. The foaming agent is foaming agent PO-6TS or PB-2000. Before mixing, the gaize and frit are ground to specific surface area of 3500-4000 cm2/g. The stabilising additive is used to prepare foam. The moulded articles are fired at temperature of 950°C. Components of the initial mixture are in the following ratio, wt %: rock - 45.5-47.0; mineral binder - 6.5-7.0; stabilising additive - 0.8-0.9; fluxing agent - 15.0-17.0; foaming agent - 0.6 5-0.7; water - the balance.
EFFECT: low heat conductivity and sorption moistening, high strength and wider raw material base for producing foamed glass-ceramic articles.
SUBSTANCE: invention relates to structural materials, specifically to formation of pores in gypsum mixtures, and can be used in the industry of structural materials. In the method of preparing a gas-forming agent for formation of pores in gypsum mixtures, involving mixing calcium carbonate, aluminium sulphate and water, a prepared salt solution consisting of aluminium sulphate and water is mixed with calcium carbonate which is ground to specific surface area of 250-280 m2/kg, with the following ratio of dry components, wt %: aluminium sulphate 30-35.7, calcium carbonate 64.3-70.
EFFECT: obtaining foamed gypsum of low density and heat-conductivity.
FIELD: process engineering.
SUBSTANCE: invention relates to production of inorganic heat-resistant rustproof composites in production of plastics, antirust and lubing materials for construction, electrical engineering, etc. Proposed method comprises mixing of inorganic natural material, liquid glass, dolomite powder and additive, mix forming and thermal treatment. Used is liquid sodium glass, its density making 1.28-1.42 kg/m3, as inorganic natural material, that is, montmorillonite modified by organic substance. Said additive represents a hydrated cellulose fibre shaped to 5.0-20.0 mm long staple impregnated with 30%-aqueous solution of iron, zinc, copper and aluminium sulphates taken in the ratio of 1.0:0.5:0.5:1.0 in flushing bath for 70-80 minutes. Then, said fibre is squeezed to moisture content of 60-65% and dried at 120-140°C to remove 95-98% of residual moisture. Components are mixed by mechanical activation for 8-10 minutes, mix being formed and annealed at temperature increase from 140°C to 1300°C for 30-40 minutes. Note here that montmorillonite is modified by the product of interaction between caprolactam or its oligomers with butyl stearate. Mix contains components in the following ratio in wt %: modified montmorillonite - 20-60, liquid glass - 20-30, dolomite - 10-35, cellulose fibre - 10-15. This invention is developed in dependent clauses.
EFFECT: higher fire resistance, lower heat conductivity factor, antirust properties.
3 cl, 3 ex, 1 tbl
SUBSTANCE: invention relates to industry of construction materials and may be used for production of non-baked heat insulation materials, used for insulation of buildings, structures and pipelines. A composition for production of a heat insulation material, including a binder, a silica-containing filler and boric acid, the binder is an aqueous solution of sodium polysilicate with a silicate module 4.2, produced by introduction of 10% silicon dioxide hydrosol into 30% aqueous solution of sodium silicate with their ratio of 1:1, mixing at 100°C for 3.0 hrs with subsequent soaking at this temperature for 0.4 hrs, and the specified filler - finely ground diatomite at the following ratio of components, wt %: aqueous solution of sodium polysilicate 92.0-95.5, diatomite 1.5-3.0, boric acid 3-6.
EFFECT: increased compression strength and reduced density of a heat insulation material.
SUBSTANCE: invention relates to raw material mixtures for obtaining a heat-insulating material, which is applied for the production of heat-insulating coatings of pipelines with cooling media in nuclear and thermal power plants. A composition for obtaining the heat-insulating material includes a binding agent, a silica-containing filler, sodium fluorosilicate and polyethyleneglycol, as the binding agent it contains a water solution of sodium polysilicate with the silicate modulus 4.2, obtained by the introduction of 10% hydrosol of silicon dioxide into a 30% water solution of sodium silicate with their ratio of 1:1, mixing at 100°C for 3.0 h with the following exposure at the said temperature 0.4, and the said filler - milled gaize with the following component ratio, wt %: water solution of sodium polysilicate 100, milled gaize 0.01-45, sodium fluorsilicate 10-40, polyethylorganosilicone 5-25.
EFFECT: reduction of density and the thermal conductivity coefficient.
1 ex, 1 tbl
SUBSTANCE: raw mixture for production of heat-insulating layer, comprising fibrous filler, liquid glass, as fibrous filler includes the fibre composite, obtained on the basis of cotton fibres, and having a form of flakes of tangled fibre, at the following ratio of components, weight parts: fibre composite 100, liquid glass 50-100.
EFFECT: simplification of preparation technology of heat-insulating layer.
SUBSTANCE: raw mixture for production of heat-insulating layer contains, weight parts: fibrous metal-ceramics 100, liquid glass 65-75, chalk stone 10-15.
EFFECT: increase of operating temperature.
SUBSTANCE: invention relates to construction industry, to the method to produce glass haydite and porous ceramics. In the method to produce glass haydite and porous ceramics including preliminary grinding of silicon-containing mixture of fossil meal and silica clay and its subsequent mixing with an alkaline component - caustic soda, granulation of the produced mixture, swelling and sintering in a rotary furnace, the specified silicon-containing mixture is previously exposed to grinding to fraction of 3-5 mm with subsequent drying at temperature of 600°C to moisture of 10%, repeated grinding to produce powder of fraction of 0.315 mm, then the produced powder is serially exposed to granulation and chemicalisation in a turbulent granulating machine, where the power is supplied in a dosed manner, as well as caustic soda solution, with production of granules of fraction from 1.5 to 2.5 mm, then the produced granules are exposed to repeated granulation and chemicalisation in a plate granulating machine, where the produced granules are supplied in a dosed manner, the specified powder and caustic soda solution, with production of granules of final fraction from 5 to 7 mm with moisture of 45% by mass, which are exposed to drying, swelling and sintering to achievement of swelling coefficient from 2.2 to 5.5 depending on the specified formula, in a rotary hearth furnace with temperature of 740-760°C for 15-20 minutes, or thermal treatment of granules is carried out at an electric conveyor in process of their delivery to a consumer.
EFFECT: production of semi-dry granules of high strength with low water content in a solution for chemicalisation of components, combination of processes of chemicalisation and granulation.
SUBSTANCE: invention relates to production of high-strength, light-weight heat-noise-moisture insulating, heat-resistant structural materials. A crude mixture for producing heat-noise-moisture insulating, heat-resistant material, which contains filler - expanded pearlite or expanded vermiculite, quartz sand, schungite or liquid glass, contains said pearlite or vermiculite with particle size of 0.5-2.5 mm, quartz sand, containing not more than 3% silt and clay, with particle size of 0.01-0.03 mm, liquid glass with density of 1.45 g/cm3 and additionally basalt or glass fibre with particle size of 3-7 mm, magnesite powder, magnesium chloride solution with density of 1.2-1.25 g/cm3 and sodium silicofluoride, wherein the magnesite powder and schungite are in form of a magnesite-schungite mixture in ratio 1:3, with the following ratio of components, wt %: said sand - 21.5-26.88, said fibre - 0.54-0.65, said mixture - 8.06-9.14, said liquid glass - 10.75-12.37, sodium silicofluoride - 0.5-1.5, said solution - 2.0-2.2, said filler - the balance. The method of producing a structural article from said crude mixture is characterised by mixing quartz sand with a portion of liquid glass to a homogeneous mass, adding the expanded pearlite or vermiculite and basalt fibre or glass fibre, mixing to uniform distribution, adding the magnesite-schungite mixture in ratio 1:3, said magnesium chloride solution and then adding the remaining liquid glass, sodium silicofluoride and mixing all components to homogeneity, pouring the prepared mixture into a mould, the bottom of which is uniformly coated with a layer of quartz sand with thickness of 2.0-2.5 mm, leaving 2-3 mm from the top edges of the mould, filling the mould to the top edges with a mixture of the magnesite-schungite mixture in ratio of 1:3 with magnesium chloride solution with density of 1.2-1.25 g/cm3 in ratio of 2.86:1 which is mixed for 4-5 minutes, holding for 55-60 minutes and removing the article from the mould after vibrating the mould for 1.5-2.0 minutes.
EFFECT: reduced water absorption.
2 cl, 1 ex, 1 tbl
SUBSTANCE: raw mix to make a shell of a coarse filler used to decorate flower gardens and flowerbeds contains the following components, wt %: liquid glass with density of 1300-1500 kg/m3 30-35, urea 5-15, water 30-35, mineral filler 20-30.
EFFECT: making a shell suitable for application onto surface of coarse filler used for decoration of flower gardens and flowerbeds in spring and summer, with its subsequent decomposition in autumn and winter and soil fertilisation.
SUBSTANCE: invention relates to production of heat-insulating structural materials. The method of producing heat-insulating structural materials includes crushing silicate lumps to specific surface area of 2500 cm2/g, mixed with a modifier, a reinforcement additive in form of portland cement, a foaming agent in form of hydrogen peroxide and hardening water, pouring into an article mould and carrying out heat treatment of the article with microwave currents for 15 minutes at temperature of 300°C, wherein the modifier used is superplasticiser S-3, and an additional reinforcement additive used is basalt microfibre with the following ratio of components, wt %: said silicate lumps 62-64, superplasticiser S-3 0.01-0.012, portland cement 10-12, basalt microfibre 0.04-0.1, hydrogen peroxide 0.5-0.7, hardening water 25.
EFFECT: improved physical and mechanical properties.
SUBSTANCE: crude mixture for making material which imitates natural stone contains, wt %: mica which is crushed and sieved through sieve N5 5.0-7.0; liquid glass 1.0-1.5; water 29.0-31.0; white portland cement 33.0-35.0; quartz glass which ground and sieved through sieve N 014 21.0-28.5; sodium ethylsiliconate or sodium methylsiliconate 0.5-1.0; at least one component selected from a group comprising chromium oxide, ultramarine, ochre, red oxide, pyrolusite, red lead 0.3-3.0.
EFFECT: high water resistance.
SUBSTANCE: invention relates to inorganic fine materials, specifically to hollow glass-lined pearlite-based microspheres, and can be used in producing microspheres from other acidic hydroalumosilicates. In the method of making hydrophobic light-weight microspherical pearlite-based aggregate, which includes preparing a starting mixture, grinding said mixture, preparing a slurry, simultaneously moulding and drying granules, expanding said granules, the slurry is prepared by combined grinding of pearlite, ascharite, lithium carbonate and strontium carbonate in 2-3% NaOH solution to particle size of less than 5 mcm, with the following ratio of components, wt %: Ascharite - 2-4; lithium carbonate - 0.2-3; strontium carbonate - 0.2-3; pearlite - the balance, and the granules are moulded and dried by feeding the slurry through a sprayer with calibrated orifices into a tower-shaped spray dryer to obtain granules with moisture content of less than 0.9 wt % at the output.
EFFECT: obtaining hardened and hydrophobic granules.