Method of tpp low-lime cinder wastes processing with high content of unburnt coal particles with subsequent application of cinder wastes in production of construction materials and in construction

FIELD: technological processes.

SUBSTANCE: invention relates to combustion products processing methods and can be used at thermal power plants operating on coal fuels, as well as in construction industry, for example, in production of various construction materials. Method of TPP low-lime cinder wastes processing with high content of unburnt coal particles with subsequent application of TPP ash-slag wastes in production of construction materials and in construction TPP cinder wastes are granulated with binder, in form of lime in amount of 5–10 wt%, or clay in amount of 10–15 wt%, or liquid glass in amount of 3–7 wt% by sodium silicate, or TPP high-lime ash in amount of 10–40 wt%, granules are dried, additionally, before granulation with unburnt coal particles content in TPP cinder wastes of less than 15 wt% cinder mixture is added with ground coal in amount sufficient for enabling of cinder mixture calorific capacity in range of 6.3–7.5 kJ/kg, and before cinder mixture granulation at TPP cinder wastes liquid consistence from hydraulic ash removal system or ash dump said wastes are dehydrated util residual humidity of not more than 30 % with clarified water return to TPP, and unburnt coal particles removal is performed by cinder mixture granules burning at temperature of 850–900oC in fluidized bed boiler with cinder mixture coal particles burning until residual amount of not more than 1 wt% and heat recovery at TPP or in other consumers.

EFFECT: increasing quality of TPP cinder wastes processing and obtained raw material for construction materials, cinder wastes recycling.

1 cl, 1 ex, 1 dwg

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to inorganic chemistry, namely to obtaining silicon-carbide materials and products, and can be applied as thermal-protective, chemically and erosion resistant materials, used in creation of aviation and rocket technology, carriers with developed surface of heterogeneous catalysis catalysts, materials of chemical sensorics, filters for filtering flows of incandescent gases and melts, as well as in nuclear power industry technologies. To obtain nanostructures SiC ceramics solution of phenolformaldehyde resin with weight content of carbon from 5 to 40% with tetraethoxysilane with concentration from 1·10-3 to 2 mol/l and acidic catalyst of tetraethoxysilane hydrolysis id prepared in organic solvent; hydrolysis of tetraethoxysilane is carried out at temperature 0÷95°C with hydrolysing solutions, containing water and/or organic solvent, with formation of gel. Obtained gel is dried at temperature 0÷250°C and pressure 1·10-4÷1 atm until mass change stops, after which carbonisation is realised at temperature from 400 to 1000°C for 0.5÷12 hours in inert atmosphere or under reduced pressure with formation of highly-disperse initial mixture SiO2-C, from which ceramics is moulded by spark plasma sintering at temperature from 1300 to 2200°C and pressure 3.5÷6 kN for from 3 to 120 min under conditions of dynamic vacuum or in inert medium. Excessive carbon is burned in air at temperature 350÷800°C.

EFFECT: obtaining nanostructured silicon-carbide porous ceramics without accessory phases.

4 cl, 4 dwg, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to production of porous filling agents for concretes. Charge for production of porous filling agent contains, wt %: montmorillonite clay 87.0-87.5, coal, milled to specific surface 2500-3000 cm2/g, blastfurnace slag, milled to specific surface 2500-3000 cm2/g 3.0-3.5; quartz sand 4.0-6.0, milled to specific surface 2500-3000 cm2/g, halite 0.5-1.0, soda ash 0.3-0.5.

EFFECT: increase frost-resistance of porous filling agent, obtained from charge.

1 tbl

FIELD: construction.

SUBSTANCE: raw mix for expanded clay production includes, wt %: brick clay 96.0-97.5, bentonite 0.5-1.0, dry peat 0.5-1.5, phosphorite 1.5-2.5.

EFFECT: increase of strength of expanded clay.

1 tbl

FIELD: chemistry.

SUBSTANCE: liquid phenolformaldehyde resin is mixed with powder of oxalic acid of various fractional composition (as pore former) until homogeneous plastic mass is obtained, workpieces are formed by vibration impact and hardened, thermal processing in static atmosphere in the interval of temperatures from 210 to 250°C and pyrolytic carbonisation in protective medium are carried out. Workpiece hardening is realised at temperature 60-80°C for 20-60 minutes. Before carbonisation it is possible to introduce precursors of metals from iron group into obtained porous workpiece by method of impregnation. Pore-former is removed from workpiece by method of extraction. Method is technologically simple and economically profitable.

EFFECT: reduction of density and increase of strength with simultaneous preservation of specific adsorption surface of obtained material.

4 cl, 2 dwg, 1 tbl

FIELD: construction.

SUBSTANCE: charge for production of a porous filler contains, wt %: brick clay 83.5-87.5, quartz sand 10.0-14.0, schungite ground until complete passage via a mesh with hole size of 5 mm, 1.0-1.5, peat crumb sifted via a mesh with particle size 5 mm, 1.0-1.5.

EFFECT: increased strength of a porous filler.

1 tbl

FIELD: chemistry.

SUBSTANCE: charge for production of porous filler contains, wt %: montmorillonite clay 87.0-90.0, milled for passage through mesh No 0.63 coal 1.0-1.5, quartz sand 7.0-9.0, borax 1.5-3.0.

EFFECT: increased strength of porous filler, obtained from charge.

1 tbl

FIELD: chemistry.

SUBSTANCE: charge for production of porous filler contains, wt %: montmorillonite clay 94.5-97.5, coal milled to specific surface 2000-2500 cm2/g 2.0-4.0, nigre, preliminarily diluted in hot water with temperature 85-90°C, 0.5-1.5.

EFFECT: improvement of porous structure of filler, obtained from charge.

1 tbl

FIELD: chemistry.

SUBSTANCE: mixture for making porous aggregate contains, wt %: montmorillonite clay 94.0-99.0, dry peat which is ground and sieved through sieve N2.5 0.5-3.0, borax 0.5-3.0.

EFFECT: high strength of the porous aggregate made from the mixture.

1 tbl

FIELD: chemistry.

SUBSTANCE: charge for a porous filler production contains, wt %: montmorillonite clay 79.0-86.0, quartz sand 13.0-16.0, dry peat, milled to complete passing through a mesh with the size of holes of 2.5 mm 1.0-5.0.

EFFECT: increased strength of the porous filler.

1 tbl

FIELD: food industry.

SUBSTANCE: mixture for making porous aggregate includes, wt %: low-melting clay 70.0-76.0, oil sludge 8.0-10.0, flax shive ground until passage through sieve N5 10.0-16.0, liquid glass 4.0-6.0.

EFFECT: low firing temperature of the porous aggregate.

1 tbl

FIELD: construction.

SUBSTANCE: raw mixture for manufacture of expanded clay contains the following, wt %: brick clay 96.5-98.0, kaolin 0.5-1.0, liquid glass with silica modulus of 3.2-4 and density of 1300-1500 kg/m3 1.5-2.5.

EFFECT: increasing expanded clay strength.

1 tbl

FIELD: construction.

SUBSTANCE: composition for production of porous aggregate comprises, wt %: sodium water-glass with density of 1.41 g / cm3 50-75, sodium chloride, milled to size less than 0.3 mm 1-3, shale ash, containing, wt %: SiO2 - 30.8, Al2O3 - 13.8, Fe2O3 - 7.2, MgO - 1.4, CaO - 15.2, R2O - 4.2, percentage point - 27.4, 22-49.

EFFECT: improved strength during compression and softening factor of porous aggregate, industrial waste utilisation.

4 tbl

FIELD: construction.

SUBSTANCE: composition for production of porous aggregate comprises, wt %: sodium water-glass with density of 1.41 g/cm3 50-75, sodium chloride, milled to size less than 0.3 mm, 1-3, slaty ash, ground to pass through the sieve of 0.14 mm and containing, wt %: SiO2 - 22.4; Al2O3 - 12.2; Fe2O3 - 7.8; MgO - 1.3; CaO - 17.3; R2O - 5.2; percentage point - 33.8, 22-49.

EFFECT: improved strength during compression and softening factor of porous aggregate, industrial waste utilisation.

4 tbl

FIELD: construction.

SUBSTANCE: in a manufacturing method of artificial porous filler, which involves layer-by-layer laying of granulated material and its sintering in layers, for formation of at least two layers with thickness of 10-15 mm each, broken glass with particle size of 3-5 mm and granulated blast-furnace slag with particle size of 0.6-5 mm is used as granulated material; after that, it is sintered at the temperature of 900-1050°C, cooled, and subject to crushing and fractioning.

EFFECT: simpler manufacturing technology of porous filler at provision of its freeze resistance.

2 ex

FIELD: metallurgy.

SUBSTANCE: production of pellets from dressing tailings is effects at heating of wastes to melting point I the zone of microwave field penetration at frequency of 2450 MHz. Initial stock represents tailings of dressing factories of gold extraction containing the catalytically active metals Cu, Al, Ti, Zn, Zr.

EFFECT: decreased environmental contamination, production of pellets to be used in various catalytic systems and as heat insulators.

2 cl, 1 ex

FIELD: chemistry.

SUBSTANCE: raw material mixture for porous concrete contains, wt %: Portland cement 39.0-56.4, TPP fly ash - 4 of Omsk city 8.5-30.0, building gypsum GP-6 0.28-0.41, aluminium paste 0.06-0.1, detergent powder "Zifa" 0.001-0.002, sodium hydroxide 0.41-0.6, calcium chloride 0.21-0.26, 7-12 mm long polyethylene fibres with diameter 0.33-0.38 mcm 0.06-0.07, water 29.978-33.659.

EFFECT: increased strength and frost resistance, reduction of heat conductivity of porous concrete.

1 ex, 2 tbl

FIELD: construction.

SUBSTANCE: charge for production of a porous filler contains, wt %: brick clay 76.0-79.5, quartz sand 16.0-18.0, schungite ground until complete passage via a mesh with hole size of 2.5 mm, 1.0-1.5, pyrophyllite ground to complete passage via a mesh with particle size 2.5 mm, 3.5-4.5.

EFFECT: increased strength of a porous filler.

1 tbl

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil processing industry and can be used at processing of oil or heavy hydrocarbon compounds to obtain a volumetric carbon frame for composite materials. In compliance with the proposed method, a formwork is prepared, the cross section of which determines a profile of the carbon frame, and mass of a solid-state melting catalyst - blowing agent is formed inside the formwork by means of individual components having either a regular or irregular geometrical shape; besides, laying of the individual components is performed so that an inter-rib gap forms continuous inter-rib formwork channels along ribs and tops of the laid bodies. A raw mixture is prepared by addition to heavy hydrocarbon compounds of a cocatalyst consisting of a mixture of light hydrocarbons; the inter-rib formwork channels are filled inside the formwork in the body of the mass of the solid-state melting catalyst - blowing agent with the raw mixture; the formwork is fully placed into a melt of a catalytic mixture having the temperature of 200-300°C, and the formwork is exposed in the melt of the catalytic mixture till melting of the mass of the solid-state melting catalyst - blowing agent and formation of a volumetric carbon frame. Then, the formwork is removed together with the obtained volumetric carbon frame and the latter is cleaned from residues of the liquid melt of the catalytic mixture. As a melting catalyst - blowing agent, a mixture of metal chlorides is used, which has a melting temperature of 180-200°C.

EFFECT: simpler production of a carbon frame owing to excluding a carbon fibre production stage.

16 cl, 3 tbl, 4 dwg

FIELD: machine building.

SUBSTANCE: deposition is performed by forming of monolayers at the expense of collisions of deposited particles of ceramic material with the surface of mandrel at a minimum angle 45°, except for zero. Each monolayer is formed with the maximum thickness 0.04 mm. The porosity is formed as through one, pores are parallel to each other and slant to working surface of an article with channel pores (2) with variable cross-section, from which the least is from the side of output of filtered medium. The geometry of a pore space increases penetrability of an article more than twice.

EFFECT: creation of conditions for obtaining of open channel porosity in a body of an article.

5 cl, 4 dwg, 2 tbl, 11 ex

FIELD: process engineering.

SUBSTANCE: invention relates to powder metallurgy, particularly, to charge compositions for production of porous permeable catalytic material by self-propagating high-temperature synthesis and can be used for production of filter elements. Charge with loparite contains the following components in wt %: iron scale 47.5-47.8, chromium oxide (III) 10.5-11.5, chromium 5.2-5.6, nickel 5.5-6.0, aluminium 12.3-12.5, bastnaesite ore 15-17, copper 1.6-2.0. Said porous permeable material ensures high-quality catalytic cleaning of ICE exhaust gases.

EFFECT: higher resistance to dynamic and static loads.

1 tbl, 1 ex

FIELD: construction.

SUBSTANCE: raw mixture for manufacture of expanded clay contains the following, wt %: brick clay 96.5-98.0, kaolin 0.5-1.0, liquid glass with silica modulus of 3.2-4 and density of 1300-1500 kg/m3 1.5-2.5.

EFFECT: increasing expanded clay strength.

1 tbl

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