CN107640952A - The method for producing light concrete product - Google Patents
The method for producing light concrete product Download PDFInfo
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- CN107640952A CN107640952A CN201710939657.8A CN201710939657A CN107640952A CN 107640952 A CN107640952 A CN 107640952A CN 201710939657 A CN201710939657 A CN 201710939657A CN 107640952 A CN107640952 A CN 107640952A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a kind of method for producing light concrete product, including：(1) dry desulfurization denitration is carried out to flue gas using flue gas desulfurization and denitrification agent, forms binder materials；The flue gas desulfurization and denitrification agent includes 70~93 parts by weight carbide slags, 5~25 parts by weight magnesia and 1~5 part by weight of catalyst；Described catalyst is selected from TiO2、Al(OH)3、V2O5、WO3、K2O, binuclear phthalocyanine ferro-cobalt (II) or CaSiO3In one or more, described flue gas desulfurization and denitrification agent do not contain calcium oxide；(2) binder materials is well mixed with light-weight aggregate, admixture and normal sands, forms compound；(3) compound is mixed with industrial wastewater, then through being molded, vibrating, being stripped and conserving, so as to form light concrete product.The present invention can reduce industrial wastes, can also utilize industrial wastewater, solid waste, so as to while solving these pollutions, provide raw material again for building industry.
Description
Technical field
The present invention relates to a kind of method for producing light concrete product, especially a kind of flue gas desulfurization based on carbide slag
Denitration, waste water, the method for the integrative coordinated Processing tecchnics production light concrete product of solid waste.
Background technology
Modern architecture constantly develops to high level, and many requirements are proposed to wall, such as reduces thickness, mitigates deadweight, insulation
It is heat-insulated it is good, sound insulation is good, intensity is suitable etc. so that light concrete product is favored by market.Lightweight concrete system
Product, such as BM building blocks (lightweight concrete building block), are the construction materials produced using light-weight aggregate as main raw material(s), its extensive use
In reconstruction project, skyscraper indoor partition etc..At present, the light concrete product that construction market is manufactured and used is mainly by water
The materials such as mud, gypsum, lightweight concrete, string, foamed cement are made, including GRC (glass fiber reinforced cement) circular hole bar
Plate, GRC square hole battens etc..
Along with China's rapid economic development, a large amount of waste residue waste materials are generated.For example, boiler fired coal produces cinder；Calcium carbide
Produce acetylene and produce calcium carbide paste, or carbide slag；Coal-burning power plant produces flyash；Steel mill produces slag；Built caused by removing
Rubbish.But the major part of these waste residue waste materials does not obtain processing application well, takes a large amount of soils, pollutes ring
Border.
On the one hand, the main waste residue that current Concrete Industry utilizes is low-quality flyash.However, with Concrete Industry
Development, supply falls short of demand for fine coal waste slag.Many Concrete Enterprises are finding substitute.On the other hand, carbide slag is calcium carbide
With caused trade waste during water reaction generation acetylene gas.The main component of carbide slag is Ca (OH)2, also simultaneously
Contain plurality of impurities, such as oxide of sulfide, cyanide, iron magnesium-aluminum-calcium etc.；Need rationally to utilize it.
CN101642674B discloses a kind of wet fuel gas desulfurizing technology of carbide slag pretreatment, and desulfurizing agent pair is used as using carbide slag slurry
Flue gas carries out wet desulphurization processing, and catalyst is added in carbide slag slurry, and blasts air and carry out oxidation reaction, oxidation reaction
Carbide slag slurry afterwards is re-used as desulfurizing agent and carries out smoke-gas wet desulfurization processing.It is pre- that CN101816891A discloses a kind of carbide slag
The ozonation and wet-method flue gas desulphurization process of processing, wet desulphurization is carried out to flue gas using carbide slag as desulfurizing agent, in calcium carbide scorification
The gaseous mixture of ozone and oxygen is passed through during slag, carries out oxidation reaction, the carbide slag slurry after oxidation is carried out as desulfurizing agent
Flue gas desulfurization.Above-mentioned technique is wet desulfurizing process, easily produces a large amount of industrial wastes.
The content of the invention
It is an object of the present invention to provide a kind of production method of light concrete product, and it can not only reduce work
Industry waste liquid, industrial wastewater, solid waste can also be utilized, so as to while solving these pollutions, provide former material again for building industry
Material.According to further aim of the present invention, discharged in production process without " three wastes ", so as to which dramatically reduction enterprise pollution is controlled
The expenditure of reason, so as to realize green, recyclable economic development.
The present invention provides a kind of method for producing light concrete product, comprises the following steps：
(1) dry desulfurization denitration is carried out to flue gas using flue gas desulfurization and denitrification agent, so as to form binder materials；The flue gas
Desulfurization denitrification agent includes 70~93 parts by weight carbide slags, 5~25 parts by weight magnesia and 1~5 part by weight of catalyst；Wherein, institute
The catalyst stated is selected from TiO2、Al(OH)3、V2O5、WO3、K2O, binuclear phthalocyanine ferro-cobalt (II) or CaSiO3In one or more,
Described flue gas desulfurization and denitrification agent does not contain calcium oxide；
(2) binder materials is well mixed with light-weight aggregate, admixture and normal sands, so as to form compound；With
(3) compound is mixed with industrial wastewater, then through being molded, vibrating, being stripped and conserving, so as to form lightweight concrete
Product.
Method in accordance with the invention it is preferred that in step (1), described carbide slag is electricity caused by dry acetylene generation process
The polished obtained granularity of rock ballast product is less than the finished product of 200 mesh；Described magnesia is the powder that granularity is less than 100 mesh,
Its active oxidation content of magnesium is more than 70wt%.
Method in accordance with the invention it is preferred that in step (1), the active oxidation content of magnesium in the magnesia is
80wt%~85wt%.
Method in accordance with the invention it is preferred that in step (1), the flue gas desulfurization and denitrification agent is composed of the following components：
1) 92 parts by weight carbide slag, 5 parts by weight magnesia and 3 parts by weight of titanium dioxide；Or
2) 87.6 parts by weight carbide slag, 10 parts by weight magnesia and 2.4 parts by weight aluminium hydroxides；Or
3) 83 parts by weight carbide slag, 15 parts by weight magnesia and 2 parts by weight vanadic anhydrides.
Method in accordance with the invention it is preferred that described flue gas desulfurization and denitrification agent is dry powder-shaped.
Method in accordance with the invention it is preferred that in the dry desulfurization denitrification process of step (1), the dioxy of the flue gas
Change sulfur content is 350~700mg/Nm3, amount of nitrogen oxides be 350~500mg/Nm3, oxygen content be 15~20vol%, stream
Speed is 125~145 DEG C for 3.5~5m/s and temperature.
Method in accordance with the invention it is preferred that in step (2), binder materials and the weight of light-weight aggregate, admixture and normal sands
Amount proportioning is 40~80: 4~8: 5~15: 5~10；In step (3), the industrial wastewater is the 50 of the binder materials weight
~80wt%.
Method in accordance with the invention it is preferred that in step (2), the light-weight aggregate be selected from lytag, leca,
The one or more of haydites of book structure, self-igniting coal gangue light-weight aggregate or cinder；The admixture be selected from flyash, slag, grain slag or
The one or more of building waste powder.
Method in accordance with the invention it is preferred that in step (2), binder materials and the weight of light-weight aggregate, admixture and normal sands
Amount proportioning is 70~80: 5~8: 5~9: 5~8；The light-weight aggregate is leca or haydites of book structure；The admixture is slag
Or grain slag；In step (3), the industrial wastewater is 60~65wt% of the binder materials weight.
Method in accordance with the invention it is preferred that in step (3), the industrial wastewater is that the industrial soda without organic matter is given up
Water.
The method of the present invention makes full use of the characteristic of carbide slag, uses it for flue gas desulfurization and denitrification, the gelling of gained byproduct
Material mixes with Industrial Solid Wastes such as light-weight aggregate, admixtures, and forms light concrete product using industrial wastewater.Thus, this hair
It is bright to not only reduce industrial wastes, industrial wastewater and Industrial Solid Waste are also used, so as to while solving these pollutions, be again
Building industry provides raw material.In addition, The present invention reduces the dosage of flyash, not even using flyash, it is possible to obtain
Light concrete product, so as to reduce the dependence to flyash.According to currently preferred technical scheme, nothing in production process
" three wastes " discharge, so as to dramatically reduce the expenditure that enterprise pollution is administered, so as to realize green, recyclable economic hair
Exhibition.
Embodiment
With reference to specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to
This.
The light concrete product of the present invention is a kind of construction material of lightweight, and specific example includes but is not limited to light collection
Expect chained block (BM building blocks) etc..The light concrete product of the present invention includes (1) flue gas desulfurization and denitrification step；(2) mixing step
Suddenly；(3) product molding step.Introduce in detail below.
<Flue gas desulfurization and denitrification step>
Dry desulfurization denitration is carried out to flue gas using flue gas desulfurization and denitrification agent, so as to form binder materials.This can be used
The conventional equipment in field carries out flue gas desulfurization and denitrification, repeats no more here.The flue gas desulfurization and denitrification agent of the present invention includes 70~93
Parts by weight carbide slag, 5~25 parts by weight magnesia and 1~5 part by weight of catalyst；Wherein, described catalyst is selected from TiO2、Al
(OH)3、V2O5、WO3、K2O, binuclear phthalocyanine ferro-cobalt (II) or CaSiO3In one or more, and described flue gas desulfurization and denitrification
Agent does not contain calcium oxide.
Using carbide slag as major ingredient, magnesia is auxiliary material, and adds suitable catalyst for the flue gas desulfurization and denitrification agent of the present invention.
It can so make it that the function of carbide slag is given full play to, have desulfurization and denitration function concurrently, and unit removing can be reduced
Carbide slag dosage under amount.The flue gas desulfurization and denitrification agent of the present invention does not contain calcium oxide.Carbide slag under so-called unit removing amount
The weight of carbide slag required for the same amount of flue gas of dosage expression removing.It is a discovery of the invention that calcium oxide can not significantly reduce
Carbide slag dosage under unit removing amount.
The flue gas desulfurization and denitrification agent of the present invention includes following component：Carbide slag, magnesia and catalyst.The dosage of carbide slag
For 70~93 parts by weight, preferably 80~92 parts by weight, more preferably 83~86 parts by weight.The dosage of magnesia is 5~25 weights
Measure part, more preferably preferably 5~15 parts by weight, 10~15 parts by weight.The dosage of catalyst is 1~5 parts by weight, preferably 2
~3 parts by weight, more preferably 2~2.5 parts by weight.The dosage of said components is controlled in above range, can be improved identical
Desulfurized effect and denitration effect under the flue gas desulfurization and denitrification agent of dosage.
In the present invention, carbide slag is industrial waste；Preferably carbide slag product is ground caused by dry acetylene generation process
The granularity obtained afterwards is less than the finished product of 200 mesh.The granularity of carbide slag can be less than 200 mesh, preferably smaller than 300 mesh, more preferably small
In 350 mesh.Using above-mentioned carbide slag, be advantageous to improve desulfurization off sulfide effect.
In the present invention, magnesia can be the powder of powder, preferably smaller than 200 mesh that granularity is less than 100 mesh.The present invention
Magnesia in, active oxidation content of magnesium can be more than 70wt%, preferably 70wt%~85wt%, more preferably 80wt%~
85wt%.Using above-mentioned magnesia, be advantageous to improve desulfurization off sulfide effect.
In the present invention, catalyst can be selected from TiO2、Al(OH)3、V2O5、WO3、K2O, binuclear phthalocyanine ferro-cobalt (II) or
CaSiO3In one or more.Preferably, described catalyst is selected from TiO2、Al(OH)3、V2O5In one or more.More
Preferably, described catalyst is TiO2、Al(OH)3Or V2O5.According to an embodiment of the invention, described catalyst
For Al (OH)3Or V2O5。V2O5It is most preferred.
According to the specific embodiment of the present invention, the flue gas desulfurization and denitrification agent is composed of the following components：92 weight
Part carbide slag, 5 parts by weight magnesia and 3 parts by weight of titanium dioxide.According to the another embodiment of the present invention, the cigarette
Desulfurization denitrfying agent is composed of the following components：87.6 parts by weight carbide slags, 10 parts by weight magnesia and 2.4 parts by weight hydroxides
Aluminium.It is composed of the following components according to another embodiment of the present invention, the flue gas desulfurization and denitrification agent：83 parts by weight electricity
Rock ballast, 15 parts by weight magnesia and 2 parts by weight vanadic anhydrides.It is a discovery of the invention that the flue gas of said components and dosage takes off
Sulphur denitrfying agent can preferably improve desulfurization off sulfide effect, and reduce the carbide slag dosage under unit removing amount.
In the present invention, described flue gas desulfurization and denitrification agent can be dry powder-shaped.So directly flue gas desulfurization can be taken off
Nitre agent mixes with flue gas, and then carries out SO to flue gas2And NOXRemoving.For example, by after desulfurization denitrification agent dry powder and pre- dedusting
Flue gas is sufficiently mixed in flue, carries out desulphurization denitration processing subsequently into absorption tower, the flue gas after desulphurization denitration is by chimney
Discharge.
The flue gas desulfurization and denitrification agent of the present invention can use conventional method to prepare.Such as by carbide slag, magnesia and urge
Agent is well mixed to obtain product.In addition, the preparation method of the present invention also includes the processing step of carbide slag：By carbide slag product
Through drying, crush and screening step obtain granularity be less than 200 mesh carbide slag.
Dry flue gas desulphurization denitration is carried out using above-mentioned flue gas desulfurization and denitrification agent.According to an embodiment of the invention,
Desulfurization denitrification agent dry powder is sufficiently mixed with flue gas in flue, desulphurization denitration processing, desulfurization are carried out subsequently into absorption tower
Flue gas after denitration is discharged by chimney.In the flue gas dry desulfurizing denitrification process of step (1), the sulfur dioxide of the flue gas contains
Amount can be 350~700mg/Nm3, amount of nitrogen oxides can be 350~500mg/Nm3, oxygen content can be 15~
20vol%, flow velocity can be able to be 125~145 DEG C for 3.5~5m/s and temperature.Preferably, the sulfur dioxide of the flue gas
Content can be 500~650mg/Nm3, amount of nitrogen oxides can be 380~450mg/Nm3, oxygen content can be 15~
18vol%, flow velocity can be able to be 130~135 DEG C for 3.5~3.8m/s and temperature.Above-mentioned Gas Parameters represent that flue gas enters
Parameter at mouthful；The parameter of smoke outlet is depending on practical sulphur removal denitration situation.Using above-mentioned technological parameter, be advantageous to obtain
The binder materials of steady quality is obtained, so as to be advantageous to the production of light concrete product.
<Blend step>
Binder materials is well mixed with light-weight aggregate, admixture and normal sands, so as to form compound.The compound is dry
Material.The weight proportion of binder materials and light-weight aggregate, admixture and normal sands can be 40~80: 4~8: 5~15: 5~10, excellent
Elect 70~80: 5~8: 5~9: 5~8 as.The intensity of light concrete product can so be fully ensured that.The mode of mixing is not
There is special limitation, such as may be referred to GB/T 14902-2012.
In the present invention, light-weight aggregate can be selected from lytag, leca, haydites of book structure, self-igniting coal gangue and gently collect
The one or more of material or cinder.Lytag is using flyash as primary raw material, mixes appropriate lime (or carbide slag), stone
Lightweight aggregate made of cream, additive etc..Leca is the processed manufactured haydite for primary raw material with clay etc..Shale is made pottery
Grain is to use shale as raw material, through high temperature, the refined haydite formed of roasting.Self-igniting coal gangue light-weight aggregate be using self-igniting coal gangue as
The light-weight aggregate that raw material obtains.Cinder is thermal power plant, industry and civil boiler and the waste residue of the coal-fired discharge of other equipment, is also known as
Clinker.Preferably, light-weight aggregate is the Superlight ceramsites that flyash, clay, shale, gangue or cinder are formed.Superlight ceramsites table
Show that bulk density is not more than 500kg/m3Haydite.Using such haydite, be advantageous to improve the intensity of light concrete product
Grade.It is 345~356kg/m that the example of Superlight ceramsites, which includes but is not limited to bulk density,3Leca (Xinjiang, which is built, grinds institute),
Bulk density is 477kg/m3Haydites of book structure (Fushun, which is built, grinds institute).According to an embodiment of the invention, the light-weight aggregate
For leca or haydites of book structure.Above-mentioned light-weight aggregate can substitute flyash completely, so as to reduce light concrete product enterprise
To the dependence of flyash.
In the present invention, the admixture is selected from the one or more of flyash, slag, grain slag or building waste powder.Powder
Coal ash is the fine ash that catching is got off from the flue gas after coal combustion, and flyash is the primary solids waste of coal-burning power plant's discharge.Steel
Slag is the slag of steel-making discharge, is divided into vessel slag, open hearth slag, electroslag according to the type of furnace.Grain slag is that the blast furnace slag of molten condition is placed in
Rapidly cool down and formed in water, thus be different from slag.Building waste powder is using building waste as raw material, and what is crushed consolidates
It is useless.According to an embodiment of the invention, the admixture is slag or grain slag.It so can further reduce flyash
Dosage.
<Product molding step>
Compound is mixed with industrial wastewater, then through being molded, vibrating, being stripped and conserving, so as to form lightweight concrete system
Product.Industrial wastewater is preferably 50~80wt% of the binder materials weight；The 60 of more preferably described binder materials weight~
65wt%.The industrial wastewater of above-mentioned dosage is advantageous to improve the intensity of light concrete product.The industrial wastewater of the present invention can be with
For the industrial alkali waste water without organic matter.The industrial wastewater of the above-mentioned type is advantageously steady in the quality of light concrete product
It is fixed.
Mixed process is to be thoroughly mixed to form compound and industrial wastewater to mix and stir material.Forming process is to be shaken in former
In the state of dynamic, make to mix and stir material filling mould to predetermined cloth height, and form horizontal plane.In the process, mix and stir material will gram
Its adhesive attraction power with mould is taken, narrow die space is tamped as much as possible.Process of vibrating is to pass through former
Strength vibrates and pressurization, makes to mix and stir the close shaping of material to the base substrate with predetermined altitude in mould.Knockout course is to make base substrate
Deviate from from mould, then reset former, prepare the operation of next molding cycle.In the present invention, it is preferred to it is mould
Shake shaping.Maintenance processes can be field curing or indoor maintenance.During field curing, when temperature be less than 20 DEG C, just must use modeling
Material cloth is covered on base substrate, so as to heat and moisture preserving；The maintenance that covered and sprinkled water with straw screen or mat is then needed during the broiling summer.Field curing
After the light concrete product stacking of acquisition, 10~14d is also continuously conserved.It is 20~60 that indoor maintenance, which then needs to control temperature,
DEG C, humidity is 50~100%, conserves 10~28d.Gained light concrete product is put in storage after stacking machine stacking.
" part " in following preparation example and embodiment represents parts by weight, unless specifically stated otherwise.
The performance of the BM building blocks of following examples is measured using GB/T15229-2011 and GB/T4111-2013.
Preparation example 1
The flue gas desulfurization and denitrification agent is made up of 5 parts by weight magnesia, 3 part by weight of catalyst and 92 parts by weight carbide slags.Oxygen
It is the powder that active oxidation content of magnesium is more than 70wt%, granularity is less than 100 mesh to change magnesium；Catalyst is TiO2；Carbide slag is dry method
The polished obtained granularity of carbide slag product caused by acetylene technique is less than the finished product of 200 mesh.Carbide slag, magnesia and catalysis
Flue gas desulfurization and denitrification agent is obtained after agent is well mixed.
Preparation example 2
The flue gas desulfurization and denitrification agent is by 10 parts by weight magnesia, 2.4 part by weight of catalyst and 87.6 parts by weight carbide slag groups
Into.Magnesia is the powder that activated magnesia is more than 75wt%, granularity is less than 100 mesh；Catalyst is Al (OH)3；Carbide slag is
The polished obtained granularity of carbide slag product caused by dry acetylene generation process is less than the finished product of 200 mesh.Carbide slag, magnesia and
Flue gas desulfurization and denitrification agent is obtained after catalyst is well mixed.
Preparation example 3
The flue gas desulfurization and denitrification agent is made up of 15 parts by weight magnesia, 2 part by weight of catalyst and 83 parts by weight carbide slags.Oxygen
It is the powder that activated magnesia is more than 80wt%, granularity is less than 100 mesh to change magnesium；Catalyst is V2O5；Carbide slag is drying acetylene work
The polished obtained granularity of carbide slag product caused by skill is less than the finished product of 200 mesh.Carbide slag, magnesia and catalyst mixing
Flue gas desulfurization and denitrification agent is obtained after uniformly.
Embodiment 1
(1) flue gas dry desulfurizing denitration is carried out using the flue gas desulfurization and denitrification agent of preparation example 1, obtains binder materials.Flue gas
Flow velocity be 3.5m/s, the oxygen content of flue gas is 15vol%；The other specification of smoke inlet, the parameter of exhanst gas outlet such as table 1
Shown in 2.
(2) binder materials is well mixed with light-weight aggregate, admixture and normal sands, so as to form compound.
(3) compound is mixed with industrial wastewater, then through being molded, vibrating and conserve, so as to formed light concrete product-
BM building blocks.The industrial wastewater is the industrial alkali waste water without organic matter.
Table 1, flue gas desulfurization and denitrification project duty parameter
| Sequence number | Project | Quantity | Unit |
| 1 | Inlet flue gas amount (operating mode) | 1050000 | m3/h |
| 2 | Standard state exhaust gas volumn | 711290 | Nm3/h |
| 3 | Inlet temperature | 130 | ℃ |
| 4 | Sulfur dioxide entrance concentration | 622 | mg/Nm3 |
| 5 | Nitrogen oxides entrance concentration | 430 | mg/Nm3 |
| 6 | Entrance flue dust | 105 | mg/Nm3 |
| 7 | Humidity of flue gas | 4.7 | Wt% |
Table 2, desulphurization denitration project emission behaviour
BM building blocks material proportion and the performance test results such as table 3 and table 4.
Table 3, BM building block material proportions
| Name of material | Binder materials | Normal sands | Haydites of book structure | Flyash | Waste water |
| Specification (g) | 140 | 20 | 10 | 30 | 84 |
Table 4, BM block performance test results
| Density rating/(Kg/m3) | 650 |
| Strength grade/MPa | 2.6 |
| Water absorption rate/% | 17 |
| Contract with dry rate/% | 0.045 |
Embodiment 2
In addition to using the material proportion of table 5, other conditions are same as Example 1.BM building blocks material proportion and performance
Test result such as table 5 and table 6.
Table 5, BM building block material proportions
| Name of material | Binder materials | Normal sands | Leca | Slag | Waste water |
| Specification (g) | 150 | 16 | 16 | 18 | 90 |
Table 6, BM block performance test results
| Density rating/(Kg/m3) | 1000 |
| Strength grade/MPa | 3.5 |
| Water absorption rate/% | 15 |
| Contract with dry rate/% | 0.035 |
Embodiment 3
In addition to using the material proportion of table 7, other conditions are same as Example 1.BM building blocks material proportion and performance
Test result such as table 7 and table 8.Superlight ceramsites are that the bulk density of Fushun City Yulin refractory factory production is 300~500kg/
m3Haydite.
Table 7, BM building block formula tables
| Name of material | Binder materials | Normal sands | Superlight ceramsites | Grain slag | Waste water |
| Specification (g) | 160 | 10 | 10 | 20 | 96 |
Table 8, BM block performance test results
| Density rating/(Kg/m3) | 1200 |
| Strength grade/MPa | 7.5 |
| Water absorption rate/% | 13 |
| Contract with dry rate/% | 0.03 |
The present invention is not limited to above-mentioned embodiment, in the case of without departing substantially from the substantive content of the present invention, this area skill
Any deformation, improvement, the replacement that art personnel are contemplated that each fall within the scope of the present invention.
Claims (10)
- A kind of 1. method for producing light concrete product, it is characterised in that comprise the following steps：(1) dry desulfurization denitration is carried out to flue gas using flue gas desulfurization and denitrification agent, so as to form binder materials；The flue gas desulfurization Denitrfying agent includes 70~93 parts by weight carbide slags, 5~25 parts by weight magnesia and 1~5 part by weight of catalyst；Wherein, it is described Catalyst is selected from TiO2、Al(OH)3、V2O5、WO3、K2O, binuclear phthalocyanine ferro-cobalt (II) or CaSiO3In one or more, it is described Flue gas desulfurization and denitrification agent do not contain calcium oxide；(2) binder materials is well mixed with light-weight aggregate, admixture and normal sands, so as to form compound；With(3) compound is mixed with industrial wastewater, then through being molded, vibrating, being stripped and conserving, so as to form lightweight concrete system Product.
- 2. according to the method for claim 1, it is characterised in that in step (1), described carbide slag is dry acetylene generation process The caused polished obtained granularity of carbide slag product is less than the finished product of 200 mesh；Described magnesia is that granularity is less than 100 mesh Powder, its active oxidation content of magnesium is more than 70wt%.
- 3. according to the method for claim 1, it is characterised in that in step (1), the activated magnesia in the magnesia contains Measure as 80wt%~85wt%.
- 4. according to the method for claim 1, it is characterised in that in step (1), the flue gas desulfurization and denitrification agent is by with the following group It is grouped into：1) 92 parts by weight carbide slag, 5 parts by weight magnesia and 3 parts by weight of titanium dioxide；Or2) 87.6 parts by weight carbide slag, 10 parts by weight magnesia and 2.4 parts by weight aluminium hydroxides；Or3) 83 parts by weight carbide slag, 15 parts by weight magnesia and 2 parts by weight vanadic anhydrides.
- 5. according to the method for claim 1, it is characterised in that in step (1), described flue gas desulfurization and denitrification agent is dry powder Shape.
- 6. according to the method for claim 1, it is characterised in that in the dry desulfurization denitrification process of step (1), the cigarette The content of sulfur dioxide of gas is 350~700mg/Nm3, amount of nitrogen oxides be 350~500mg/Nm3, oxygen content be 15~ 20vol%, flow velocity are 3.5~5m/s and temperature is 125~145 DEG C.
- 7. according to the method described in any one of claim 1~6, it is characterised in that：In step (2), the weight proportion of binder materials and light-weight aggregate, admixture and normal sands is 40~80:4~8:5~15:5 ~10；WithIn step (3), the industrial wastewater is 50~80wt% of the binder materials weight.
- 8. according to the method for claim 7, it is characterised in that in step (2), the light-weight aggregate be selected from lytag, Leca, haydites of book structure, the one or more of self-igniting coal gangue light-weight aggregate or cinder；The admixture is selected from flyash, steel The one or more of slag, grain slag or building waste powder.
- 9. according to the method described in any one of claim 1~6, it is characterised in that：In step (2), the weight proportion of binder materials and light-weight aggregate, admixture and normal sands is 70~80:5~8:5~9:5~ 8；The light-weight aggregate is leca or haydites of book structure；The admixture is slag or grain slag；WithIn step (3), the industrial wastewater is 60~65wt% of the binder materials weight.
- 10. according to the method for claim 9, it is characterised in that in step (3), the industrial wastewater is without organic matter Industrial alkali waste water.
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| WO2019062455A1 (en) * | 2017-09-30 | 2019-04-04 | 中晶环境科技股份有限公司 | Flue gas desulfurization and denitration agent, preparation method therefor and applications thereof |
| CN109824303A (en) * | 2019-01-02 | 2019-05-31 | 华润水泥（富川）有限公司 | Wet-mix concrete and its preparation method |
| CN112341039A (en) * | 2020-11-15 | 2021-02-09 | 衡阳市银利实业有限公司 | Special material for reducing concrete bubbles |
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| CN109824303A (en) * | 2019-01-02 | 2019-05-31 | 华润水泥（富川）有限公司 | Wet-mix concrete and its preparation method |
| CN112341039A (en) * | 2020-11-15 | 2021-02-09 | 衡阳市银利实业有限公司 | Special material for reducing concrete bubbles |
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