CN109665816A - A kind of sintering heat-reserving brick and preparation method thereof - Google Patents
A kind of sintering heat-reserving brick and preparation method thereof Download PDFInfo
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- CN109665816A CN109665816A CN201910126562.3A CN201910126562A CN109665816A CN 109665816 A CN109665816 A CN 109665816A CN 201910126562 A CN201910126562 A CN 201910126562A CN 109665816 A CN109665816 A CN 109665816A
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- 238000005245 sintering Methods 0.000 title claims abstract description 42
- 239000011449 brick Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 35
- 230000003134 recirculating effect Effects 0.000 claims abstract description 19
- 239000002989 correction material Substances 0.000 claims abstract description 10
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 6
- 235000009566 rice Nutrition 0.000 claims abstract description 6
- 240000007594 Oryza sativa Species 0.000 claims abstract 2
- 238000001125 extrusion Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 239000004615 ingredient Substances 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 5
- 239000010903 husk Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 2
- 206010037660 Pyrexia Diseases 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 230000029087 digestion Effects 0.000 claims description 2
- 239000010451 perlite Substances 0.000 claims description 2
- 235000019362 perlite Nutrition 0.000 claims description 2
- 239000000047 product Substances 0.000 abstract description 19
- 239000002910 solid waste Substances 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 6
- 239000006227 byproduct Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 25
- 238000000034 method Methods 0.000 description 10
- 239000011451 fired brick Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 238000006477 desulfuration reaction Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 241000209094 Oryza Species 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 230000008602 contraction Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000010883 coal ash Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 2
- 235000010261 calcium sulphite Nutrition 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002551 biofuel Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
- C04B33/1355—Incineration residues
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/16—Lean materials, e.g. grog, quartz
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/0675—Vegetable refuse; Cellulosic materials, e.g. wood chips, cork, peat, paper
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- General Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of sintering heat-reserving bricks and preparation method thereof.The dry weight percentage of various materials in the adobe of the sintering heat-reserving brick are as follows: lime-ash batch 50~90%, sa aggregate 10%~30%, pore-forming material 0%~20%；The lime-ash batch includes recirculating fluidized bed lime-ash and heat correction material, and the volume of the heat correction material is the 0%~20% of lime-ash Glass Batch Quality.Circulating Fluidized Bed Ash volume is 50~90% in sintering heat-reserving brick of the invention, other materials used in building block such as clinker, sawdust, rice hull ash etc. is Industrial Solid Waste or byproduct, solid waste utilization rate is high, stable product quality, product items Testing index produced can be up to state standards the requirement of requirement, product has the characteristics that intensity is high, durability is good, meets national walling environmental protection, lightweight, energy-efficient developing direction, is a kind of environmentally protective novel wall material.
Description
Technical field
The invention belongs to solid waste resource recoveries to utilize field more particularly to a kind of sintering heat-reserving brick and its preparation side
Method.
Background technique
Combustion technology of circulating fluidized is the clean coal burning technology that recent two decades grow up.It is adapted to fuel
Property outstanding advantages of good, high combustion efficiency, nitrogen oxide emission be low, inexpensive lime stone desulfuration in furnace, in China's fire
Extensive use has been obtained in power power industry.However since circulating fluidized bed boiler calcination temperature is usually 800~900 degree,
Far below 1200 degree of plain cylindrical furnace, and the technique of spray agstone desulfurization in boiler is used, therefore recirculating fluidized bed pot
The lime-ash that furnace generates, all has notable difference with ordinary fly ash on the Nomenclature Composition and Structure of Complexes.Ordinary fly ash is by 1200 degree high
The microballon shape vitreum that temperature, mostly coal ash burning are formed after melting, and recirculating fluidized bed lime-ash calcination temperature is low, glues for granular burn
Native mineral are practically free of glass microballoon, and free calcium and calcium sulfite, calcium sulfate additionally containing desulfurizing agent formation etc. are de-
Sulphur product.
The problems such as recirculating fluidized bed lime-ash is due to high-sulfur, high calcium, poor activity, it is difficult to straight in the production of cement and concrete
Connect use.New revision national standard " for the flyash in cement and concrete " GB/T1596- that on July 12nd, 2017 promulgates
2017, explicitly point out the powder collected not comprising burning in circulating fluid bed boiler.China's most of recirculating fluidized bed lime-ash at present
In stockpiling state, urgent need solves the problems, such as its resource utilization.
Fired brick is traditional materials for wall, intensity with higher and good durability, therefore is suitable for doing building to enclose
Protection structure is largely used to build exterior wall, interior wall, column, arch, flue, channel and other structures of building.With China's ring
Guarantor puts more effort, and ordinary sinter clay brick does not allow reproduction and sale, and the raw material sources of fired brick are reduced.In addition,
Normal sintering brick bulk density is big, heat insulation effect is bad, also with country advocate lightweight, high-strength, durable, self-heat conserving, component wall
There are larger gaps for construction material product.Sintering heat-reserving brick is to develop on the basis of conventional sintering brick, passes through pore-forming material
Material so that fired brick forms solid porous or thin-wall construction, and obtain lightweight, keep the temperature and have good strength and durable
The sintered article of property.Heat-preserving sintered brick is prepared with Circulating Fluidized Bed Ash, can not only dissolve solid waste, and good building can be obtained
Material.
The pertinent literature and patent that China prepares materials for wall about recirculating fluidized bed lime-ash resource utilization at present are not
It is common, how to become the research heat of those skilled in the art using the excellent heat-preserving sintered brick of recirculating fluidized bed lime-ash processability
Point.
Summary of the invention
The present invention provides a kind of heat-preserving sintered brick and preparation method thereof to solve above-mentioned technical problem.Recirculating fluidized bed lime-ash
Volume in heat-preserving sintered brick according to dry weight up to 80% or more, according to GB26538-2011 " sintering heat-reserving brick and guarantor
Warm building block " it is detected, every Testing index can reach corresponding index request.
The technical solution taken by the invention to solve the above technical problem are as follows:
A kind of sintering heat-reserving brick, the dry weight percentage of various materials in the adobe of the sintering heat-reserving brick are as follows: lime-ash
Batch 50~90%, sa aggregate 10%~30%, pore-forming material 0%~20%；The lime-ash batch includes circulation
Fluidized bed lime-ash and heat correct material, and the volume of the heat correction material is the 0%~20% of lime-ash Glass Batch Quality.On
It states in scheme, the recirculating fluidized bed lime-ash is combustion product of the coal dust in circulating fluidized bed boiler.
In above scheme, the recirculating fluidized bed lime-ash is after coal ash burns in circulating fluidized bed boiler, and ash content is 800
~1000 degree of lower formed products.
In above scheme, the Circulating Fluidized Bed Ash cinder ladle includes burnedc lay class mineral, quartz, carbon and fume desulfurizing agent institute
Generate free lime and desulfurization product.
In above scheme, the heat correction material is the combustible material that calorific value is greater than 600kcal/kg.
In above scheme, the heat correction material is clinker, colm, coke blacking or bio-fuel.
In above scheme, the pore-forming material is sawdust, rice husk, tire debris limestone flour or expanded perlite.Institute
The pore-forming material stated refers to that spontaneous combustion or pyrolytic release gas in roasting process, form the material of stomata in product.
In above scheme, the sa aggregate is containing SiO2Mass percentage content is greater than 60%, and Al2O3Quality
The mixing of one of bulk of the degree less than 25% or graininess land waste, siltstone or two kinds of raw materials.
The preparation method of the sintering heat-reserving brick, comprising the following steps:
1) ash is obtained after recirculating fluidized bed lime-ash and heat correction material being carried out ingredient according to scheduled fever figureofmerit
Slag batch is displayed stand-by after adding water and stirring uniformly；
2) suitable quantity of water is added to mix and stir into mixing according to setting ratio ingredient the lime-ash batch being aged and blocky aggregate
Material is aged using a period of time；
3) mixture being aged is squeezed into strip by high-pressure molding extruder, and adobe is made after cutting, and adobe is dried in the air
It is dry；
4) adobe after drying enters tunnel oven and roasts to obtain sintering heat-reserving brick.In the process, adobe after drying into
Enter in tunnel oven, be gradually warmed up under the action of thermal current in kiln, be dehydrated and preheat, reaches in adobe when temperature continues to increase
After combustible material ignition point, adobe further heats up and starts to roast, while pore-forming material burning or decomposition are in adobe
Portion forms spilehole, and a series of physicochemical change is passed through in the cooling down after heat preservation roasting after a period of time, adobe, most
Become the sintering heat-reserving brick with excellent mechanical property and endurance quality eventually.
In above scheme, blocky sa aggregate is crushed and is sized to partial size less than 6mm particle in step 2).
In above scheme, the water being added in step 1) is the 5%~15% of lime-ash Glass Batch Quality.
It is displayed in above scheme, in step 1) 7 days or more.
In above scheme, digestion time is 24 hours or more in step 2).
In above scheme, the extrusion pressure of molded extruder is 4.0MPa~6.0MPa in step 3).
In above scheme, the maturing temperature of tunnel oven is between 1000~1150 degree in step 4), calcining time for 40~
60 hours.
Since recirculating fluidized bed lime-ash of the invention contains a small amount of uncompleted burned carbon, there is certain calorific value, but by recycle stream
The influence of fluidized bed boiler operation conditions, calorific value have very great fluctuation process, it is therefore desirable to which the mount of using heat corrects material ingredient, it is ensured that it generates heat
Amount is stablized and is able to satisfy tunnel oven roasting.The thermal discharge designed when ingredient is 350~450Kcal/Kg, with season temperature change
And it adjusts.If pore-forming material used such as sawdust, rice husk etc. contains calorific value, brought into the heat of pore-forming material should be deducted.
The principle of the present invention are as follows: Circulating Fluidized Bed Ash is stablized by ripening, by recirculating fluidized bed lime-ash and land waste,
The collocation of the particulate Sis aluminum aggregate batching such as sandstone, not only makes it possible extrusion forming, is also beneficial to brick bat drying dehydration, subtracts
Few adobe cracking, while the adjustment in chemical component also makes it be more suitable for being sintered, and reduces shrinkage cracking, and improve product matter
Amount.Its principle includes:
(1) stablize the property of Circulating Fluidized Bed Ash
In addition to the coal ash calcined under 800~1000 degree in recirculating fluidized bed lime-ash, also containing flue gas desulfurization when generate
The desulfurization products such as free calcium, calcium sulfite, gypsum, water requirement is big, there is a problem that volume is unstable.First plus water is mixed and is aged
It places, in ageing process, free calcium resolution, the various forms gypsum that desulfurization is formed is converted into stable dihydrate gypsum, thus
Recirculating fluidized bed lime-ash physics and chemical property is set to reach stable.By adding appropriate heat correction material, to its calorific value into
Row adjustment and control, can stablize calcination temperature.
(2) lean property fine aggregate makes it possible extrusion forming
Molding is fired brick into the important link during production, there is compression moulding and extrusion molding two ways, using crowded
Molding high production efficiency, adobe are closely knit out, are the mainstreams of fired brick molding mode.Since recirculating fluidized bed lime-ash fineness is very thin,
Circulating Fluidized Bed Ash after being even aged, viscosity is big after directly mixing and stirring with water, and extrusion is easy to be bonded on extrusion spiral, even
Locking squeezes out spiral, is not able to satisfy the material requirement of extrusion forming.Made by the way that the sas fine graineds such as land waste, siltstone are added
For lean property component, molding water requirement not only can be reduced, reduce viscosity, and play skeleton work in mixture as fine aggregate
With so that extrusion molding becomes possible.
(3) green strength is improved, the temperature-caused shrinkage of adobe is reduced
Green strength made of pure recirculating fluidized bed lime-ash is low, and volume contraction is easy greatly cracking in drying process.And weathering
The sas fine grained such as stone, siltstone is added, and plays skeletal support in the adobe of extrusion as fine aggregate, substantially increases
The intensity of adobe, and reduce the volume contraction of adobe in the drying process, reduce cracking risk.
(4) expand sintering range, reduce the contraction distortion in sintering process
Fired brick, other than being difficult to extrusion forming, SiO in chemical component are produced with Circulating Fluidized Bed Ash2Content is insufficient,
Fe2O3Content is excessive, and not only product sintering shrinkage is big, and sintering range is very narrow, the slightly relatively low just raw burn of sintering temperature, sintering
Body intensity is low；And sintering temperature it is slightly higher when occur a large amount of liquid phases suddenly, cause sintered body to deform.Increased by sa aggregate
SiO therein2、Al2O3Ingredient can effectively expand sintering range, and reduce the contraction distortion in sintering process.
(5) stomata is formed by pore-forming material, makes fired brick lighting
It is formed after these material combustions closed in adobe roasting process by the way that the pore-forming materials such as rice husk, sawdust are added
Stomata reduces the density of fired brick, and fired brick is made to be provided with lightweight, heat-insulated, sound insulation performance.
The invention has the benefit that Circulating Fluidized Bed Ash volume is 50~90% in sintering heat-reserving brick of the invention, build
Other materials used in block such as clinker, sawdust, rice hull ash etc. is Industrial Solid Waste or byproduct, and solid waste utilization rate is high,
Stable product quality, product produced are detected according to GB26538-2011 " sintering heat-reserving brick and insulation blocks ", every
Testing index can be up to state standards the requirement of requirement, and product has the characteristics that intensity is high, durability is good, meet national walling
Environmental protection, lightweight, energy-efficient developing direction are a kind of environmentally protective novel wall materials.
Specific embodiment
The present invention is described further below with reference to embodiment, certain following embodiments should not be construed as to of the invention
Limitation.
Embodiment 1
Circulating Fluidized Bed Ash is derived from MeiZhou,GuangDong Meixian Power Plant, for the brownish red powdery solid containing a small amount of moisture, calorific value
For 330Kcal/kg；Clinker derives from the enterprise of Meizhou industrial park, calorific value 820Kcal/kg；Land waste is derived from Meixian County, Guangdong Province
The town Nan Kou, blocks of solid, SiO2Content is 65.60%, Al2O3Content is 15.32%.
(1) pre-treatment of raw material
By 95% Circulating Fluidized Bed Ash and 5% clinker ingredient, suitable quantity of water is added to stir evenly, is deposited in stock ground and places 30 days
It carries out being aged above stand-by.
Land waste is crushed by the crushing system that jaw crusher, impact breaker and 6mm roto-siofter form, is broken
It is broken into the continuous grading fine aggregate less than 6mm.
(2) mixture ingredient
By ready material, Circulating Fluidized Bed Ash, 10% land waste, 10% wood being crushed being aged according to 80%
After bits carry out ingredient, then it is outer mix 10% water and be sufficiently mixed uniformly obtain adobe mixture, be placed in stockyard ageing 24 hours with
On.
(3) extrusion forming
Mixture squeezes out strip by high-pressure extrusion molding machine, is cut into adobe, adobe by predetermined size by cutting machine
It is placed on after stacking on stockyard and sufficiently dries, wherein extrusion pressure is 4.5MPa.
(4) enter tunnel oven roasting
Dry adobe enters tunnel oven, gradually completes dry, dehydration under thermal current effect in kiln, and end temperature increases
Start to roast, in tunnel oven maximum temperature control at 1100 degree, adobe from enter tunnel oven to the tunnel oven time out be 48 hours.Out
Natural cooling obtains finished product after kiln.
The product of production is detected according to GB26538-2011 " sintering heat-reserving brick and insulation blocks ", meets density etc.
Grade 1000, the requirement of strength grade MU15.Main testing result is as shown in table 1:
The service check result of 1 sintering heat-reserving brick of table
| Specification (mm) | Density (kg/m3) | Compression strength (MPa) | Thermal coefficient (w/m2K) |
| 240×115×53 | 920 | 15.6 | 0.86 |
Embodiment 2
Produce that raw material are same as Example 1, the proportion scale of mixture be 70% be aged Circulating Fluidized Bed Ash,
10% land waste, 20% sawdust being crushed, other preparation process are all the same, and product is according to GB26538-2011 " sintered heat insulating
Brick and insulation blocks " it is detected, equal composite denseness grade 900, the requirement of strength grade MU10.Main testing result such as table
Shown in 2:
The service check result of 2 sintering heat-reserving brick of table
| Specification (mm) | Density (kg/m3) | Compression strength (MPa) | Thermal coefficient (w/m2K) |
| 240×115×53 | 830 | 12.8 | 0.74 |
Embodiment 3
Produce that raw material are same as Example 1, the proportion scale of mixture be 50% be aged Circulating Fluidized Bed Ash,
30% land waste, 20% sawdust being crushed, other preparation process are roughly the same, the difference is that, wherein extrusion pressure is
5.5MPa.Product is detected according to GB26538-2011 " sintering heat-reserving brick and insulation blocks ", equal composite denseness grade 900,
The requirement of strength grade MU10.Main testing result is as shown in table 3:
The service check result of 3 sintering heat-reserving brick of table
| Specification (mm) | Density (kg/m3) | Compression strength (MPa) | Thermal coefficient (w/m2K) |
| 240×115×53 | 860 | 13.0 | 0.76 |
Above embodiments are only exemplary embodiment of the present invention, are not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (10)
1. a kind of sintering heat-reserving brick, which is characterized in that the dry weight percentage of various materials in the adobe of the sintering heat-reserving brick
Than are as follows: lime-ash batch 50~90%, sa aggregate 10%~30%, pore-forming material 0%~20%；The lime-ash batch
Material is corrected including recirculating fluidized bed lime-ash and heat, the volume of the heat correction material is the 0% of lime-ash Glass Batch Quality
~20%.
2. sintering heat-reserving brick as described in claim 1, which is characterized in that the heat correction material is greater than for calorific value
The combustible material of 600kcal/kg.
3. sintering heat-reserving brick as described in claim 1, which is characterized in that the pore-forming material is sawdust, rice husk, tire
Slag, agstone or expanded perlite.
4. sintering heat-reserving brick as described in claim 1, which is characterized in that the sa aggregate is containing SiO2Quality percentage
It is greater than 60%, and Al than content2O3One in bulk of the mass percentage content less than 25% or graininess land waste, siltstone
The mixing of kind or two kinds of raw materials.
5. such as the preparation method of the described in any item sintering heat-reserving bricks of Claims 1-4, which comprises the following steps:
1) recirculating fluidized bed lime-ash and heat correction material are matched according to obtaining lime-ash after scheduled fever figureofmerit progress ingredient
Material is closed, is displayed after adding water and stirring uniformly stand-by；
2) suitable quantity of water is added to mix and stir into mixture according to setting ratio ingredient the lime-ash batch being aged and blocky aggregate, then
It is aged after a period of time；
3) mixture being aged is squeezed into strip by high-pressure molding extruder, and adobe is made after cutting, and adobe is dried；
4) adobe after drying enters tunnel oven and roasts to obtain sintering heat-reserving brick.
6. the preparation method of sintering heat-reserving brick as claimed in claim 5, which is characterized in that the water being added in step 1) is ash
The 5%~15% of slag Glass Batch Quality.
7. the preparation method of sintering heat-reserving brick as claimed in claim 5, which is characterized in that displayed in step 1) 7 days or more.
8. the preparation method of sintering heat-reserving brick as claimed in claim 5, which is characterized in that digestion time is 24 small in step 2)
When more than.
9. the preparation method of sintering heat-reserving brick as claimed in claim 5, which is characterized in that molded extruder in step 3)
Extrusion pressure is 4.0MPa~6.0MPa.
10. the preparation method of sintering heat-reserving brick as claimed in claim 5, which is characterized in that the roasting of tunnel oven in step 4)
Temperature is calcining time 40~60 hours between 1000~1150 degree.
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| CN113200739A (en) * | 2021-04-29 | 2021-08-03 | 兰州高新技术新能源有限公司 | Heat storage brick prepared by mixing waste tire particles with concrete |
| CN119661193A (en) * | 2024-12-23 | 2025-03-21 | 武汉理工大学 | Ceramic tile and preparation method and application thereof |
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Application publication date: 20190423 |