CN107556046A - The preparation method of light concrete product - Google Patents

The preparation method of light concrete product Download PDF

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Publication number
CN107556046A
CN107556046A CN201710940532.7A CN201710940532A CN107556046A CN 107556046 A CN107556046 A CN 107556046A CN 201710940532 A CN201710940532 A CN 201710940532A CN 107556046 A CN107556046 A CN 107556046A
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weight
light
catalyst
slag
parts
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CN201710940532.7A
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童裳慧
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中晶蓝实业有限公司
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Abstract

The invention discloses a kind of preparation method of light concrete product, including:(1) use catalyst by the oxidizing sulfur dioxide of flue gas for sulfur trioxide, and by oxidation of nitric oxide it is nitrogen dioxide, then dry desulfurization denitration is carried out using the absorbent containing magnesia, so as to form the accessory substance that main component is sulfate and nitrate;(2) accessory substance, light-weight aggregate, sand material, flyash, slag charge, building waste and optional additive are well mixed, so as to form 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, make full use of industrial solid wastes, so as to obtain qualified light concrete product.

Description

The preparation method of light concrete product

Technical field

It is especially a kind of to be based on dry flue gas desulphurization denitration the present invention relates to a kind of preparation method of light concrete product The method for preparing light concrete product.

Background technology

With the development of the high stratification of urban architecture, the light block for filled wall is developed rapidly.Due to lightweight Building block is more using haydite, clinker, slag to gather materials, and the demand of these raw material increases substantially, and makes being produced into for manufacturer This also gradually rises.With urban construction and the quickening of urban renewal, lightweight concrete building block is as a kind of light wall material It is mass produced and uses;But during production and use, generate a large amount of waste materials and defective work, these waste from stacking Around floor in plant area and construction, a large amount of soils had both been taken, have polluted environment again.

Contain a large amount of dust, sulfur dioxide (SO in the flue gas of industrial discharge2), nitrogen oxides (NOx) etc. harmful substance.This A little harmful substances are the main producers thing and important sources of acid rain, haze.Control the SO in industrial smoke2、NOxDischarge is air Most important task in pollution control.Flue gas desulfurization technique can be divided into the desulfurization of calcium method, magnesium processes desulfurization and ammonia process of desulfurization etc..At present More ripe flue gas desulfurization technique mainly includes Wet Limestone/gypsum, wet-type magnesium method etc..Magnesium processes desulfurization technology can because of it Recovery byproduct obtains the favor of international flue gas desulfurization expert with the advantages such as certain economic benefit are produced.The whole world is more than 80% Magnesium ore resources in China.As the requirement that China administers to thermal power plant's sulfur dioxide is increasingly strict, plus comprehensive to recycling economy The attention utilized is closed, magnesium processes desulfurization is just increasingly getting more and more people's extensive concerning in China.

On the one hand, current flue gas desulfurization and denitration technique is mostly wet processing, it will produces a large amount of industrial wastewaters.For example, 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.And for example, CN101816891A discloses a kind of electricity The ozonation and wet-method flue gas desulphurization process of rock ballast pretreatment, wet desulphurization is carried out to flue gas using carbide slag as desulfurizing agent, in electricity The gaseous mixture of ozone and oxygen is passed through during rock ballast slugging, carries out oxidation reaction, the carbide slag slurry after oxidation is as desulfurization Agent carries out flue gas desulfurization.Above-mentioned technique is wet desulfurizing process, easily produces a large amount of industrial wastes.

On the other hand, lightweight concrete building block uses natural light-weight aggregate as raw material, exists and wastes natural resources, destroys ecology The problem of environment;Using artificial lightweight aggregate, the problem of high energy consumption, pollution weight be present.If flyash and bottom slag can be entered Row is made full use of to produce lightweight concrete building block, not only cost-effective, can also play a part of environmental protection.Do not have still at present There is the report that flyash, slag charge and building waste are used for lightweight concrete building block progress industrialized production.If feasible, pole The earth reduces pollution administration expenditure for enterprise, and finds a new profit byproduct for enterprise, green, recyclable so as to realize Economic development.

The content of the invention

It is a discovery of the invention that by catalyst by sulfur dioxide, nitrogen oxides into sulfur trioxide and nitrogen dioxide, then adopt Dry desulfurization denitration is carried out for the absorbent of primary raw material to magnesia, generates the accessory substance based on magnesium sulfate, magnesium nitrate. The accessory substance being achieved in that and light-weight aggregate, flyash, slag charge, building waste etc. mix, and can produce light concrete product.This Invention a purpose be to provide a kind of preparation method of light concrete product, it can avoid producing excessive Industry Waste Liquid, and can realize that flue gas desulfurization and denitrification, solid waste integration are administered, qualified light concrete product can also be obtained.

The present invention, which adopts the following technical scheme that, realizes above-mentioned purpose.

The present invention provides a kind of preparation method of light concrete product, comprises the following steps:

(1) use catalyst by the oxidizing sulfur dioxide of flue gas for sulfur trioxide, and be titanium dioxide by oxidation of nitric oxide Nitrogen, dry desulfurization denitration is then carried out using the absorbent containing magnesia, is sulfate and nitric acid so as to form main component The accessory substance of salt;

(2) accessory substance, light-weight aggregate, sand material, flyash, slag charge, building waste and optional additive are well mixed, from And 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;

Wherein, the catalyst includes carrier and active component;The carrier is nanoscale amphoteric oxide, is selected from TiO2、ZrO2Or HfO2In one or more;The active component includes KMnO4And nanosize metal oxide, the nanoscale Metal oxide includes V2O5、CoO、Co2O3、Fe2O3And MnO2

Preparation in accordance with the present invention, it is preferable that in step (2), accessory substance, light-weight aggregate, sand material, flyash, slag charge, The weight proportion of building waste is 100~200:80~200:80~200:120~200:100~200:60~100;Step (3) in, the industrial wastewater is 50~90wt% of the accessory substance weight.

Preparation in accordance with the present invention, it is preferable that in step (2), the light-weight aggregate is selected from lytag, clay is made pottery One or more in grain, haydites of book structure, gangue light-weight aggregate or cinder;The sand material is selected from normal sands;The slag charge is selected from Grain slag or slag;One kind in water reducer, early strength agent, retarder, foam stabilizer, air entraining agent, hydrophober of the additive or It is a variety of.

Preparation in accordance with the present invention, it is preferable that in step (2), the light-weight aggregate is haydites of book structure;The sand material is Normal sands;The slag charge is slag;The additive is polycarboxylate water-reducer.

Preparation in accordance with the present invention, it is preferable that in step (3), the industrial wastewater is the industry without organic matter Alkali waste water.

Preparation in accordance with the present invention, it is preferable that in step (1), based on 100 part by weight of catalyst, the catalyst bag Include following components:

TiO230~60 parts by weight,

ZrO210~30 parts by weight,

V2O53~9 parts by weight,

The parts by weight of CoO 3~9,

Co2O31~5 parts by weight,

Fe2O33~10 parts by weight,

MnO26~12 parts by weight, and

KMnO43~9 parts by weight.

Preparation in accordance with the present invention, it is preferable that in step (1), based on 100 part by weight of catalyst, the catalyst bag Include following components:

TiO251~58 parts by weight,

ZrO212~20 parts by weight,

V2O53~7 parts by weight,

The parts by weight of CoO 3~7,

Co2O32~5 parts by weight,

Fe2O33~7 parts by weight,

MnO26~10 parts by weight, and

KMnO43~7 parts by weight.

Preparation in accordance with the present invention, it is preferable that in step (1), the magnesia includes 70~85wt% activity Magnesia, and content of the nanoscale magnesium in the magnesia is 10~20wt%.

Preparation in accordance with the present invention, it is preferable that in step (1), the absorbent also includes calcium oxide and titanium dioxide Silicon.

Preparation in accordance with the present invention, it is preferable that in step (1), the content of sulfur dioxide of the flue gas for 300~ 40000mg/Nm3, amount of nitrogen oxides be 50~600mg/Nm3, oxygen content be 10~25vol%, flow velocity be 2~5m/s and Temperature is 95~160 DEG C.

Dry state sulfate and nitrate can be obtained as accessory substance using the catalyst and absorbent of the present invention, with wet method Desulphurization denitration is compared, and saves the processing steps such as slurries fractional crystallization, so as to reduce industrial wastewater discharge.The present invention utilizes above-mentioned Accessory substance, and using light-weight aggregate, flyash, slag charge, building waste and industrial wastewater, so as to realize zero-emission, suitable for industry Metaplasia is produced.According to currently preferred technical scheme, denitrification efficiency can be improved, and can stably produce lightweight coagulation Native product.

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.

<Desulphurization denitration step>

Flue gas is subjected to pre- dedusting in pre- cleaner, so as to remove large particulate matter, obtains pre- dedusting flue gas.Using The oxidizing sulfur dioxide of flue gas is sulfur trioxide by catalyst, and is nitrogen dioxide by oxidation of nitric oxide, is then used and is contained The absorbent of magnesia carries out dry desulfurization denitration to flue gas, so as to form the by-product that main component is sulfate and nitrate Thing.

The catalyst of the present invention includes carrier and active component, and active component is supported on carrier, for by flue gas Oxidizing sulfur dioxide is sulfur trioxide, and is nitrogen dioxide by oxidation of nitric oxide.Carrier can be nanoscale amphoteric oxide. For example, carrier is selected from TiO2、ZrO2Or HfO2In one or more;Preferably TiO2And ZrO2Combination.Active component includes Nanosize metal oxide and KMnO4.The nanosize metal oxide includes V2O5、CoO、Co2O3、Fe2O3And MnO2。V2O5It is main It is responsible for SO2Catalysis oxidation is SO3, CoO, Co2O3、Fe2O3、MnO2And KMnO4It is main to be responsible for NO catalysis oxidations being NO2.This The combination of sample can be sulfur trioxide and nitrogen dioxide fully by the sulfur dioxide in flue gas and oxidation of nitric oxide.

According to an embodiment of the invention, based on 100 part by weight of catalyst, the catalyst includes 30~60 parts by weight TiO2, 10~30 parts by weight ZrO2, 3~9 parts by weight V2O5, 3~9 parts by weight CoO, 1~5 parts by weight Co2O3, 3~10 parts by weight Fe2O3, 6~12 parts by weight MnO2With 3~9 parts by weight KMnO4.Preferably, the catalyst includes 51~58 parts by weight TiO2, 12~ 20 parts by weight ZrO2, 3~7 parts by weight V2O5, 3~7 parts by weight CoO, 2~5 parts by weight Co2O3, 3~7 parts by weight Fe2O3, 6~10 Parts by weight MnO2With 3~7 parts by weight KMnO4.It is highly preferred that the catalyst includes 53~56 parts by weight TiO2, 13~15 parts by weight ZrO2, 4~6 parts by weight V2O5, 5~6 parts by weight CoO, 3~5 parts by weight Co2O3, 3~5 parts by weight Fe2O3, 7~9 parts by weight MnO2 With 5~7 parts by weight KMnO4.According to an embodiment of the invention, the catalyst only includes said components.By above-mentioned work Property Composition Control can significantly improve it to the sulfur dioxide in flue gas and nitric oxide production oxidation effectiveness in above range, from And improve desulfurization off sulfide effect.

The catalyst of the present invention can use conventional method to obtain, such as infusion process.Nanosize metal oxide can be adopted Synthesized with conventional methods such as sol-gel process, Hydrolyze method, hydrothermal synthesis methods.Here repeat no more.Nanosize metal oxide Particle diameter can be 2~100nm, and specific surface area is 100~300m2/g.Potassium permanganate can impregnate in the form of a solution.

The absorbent of the present invention includes magnesia.Magnesia can include light calcined magnesia, micron order magnesia and/or receive Meter level magnesia.According to an embodiment of the invention, the magnesia includes 70~85wt% activated magnesia, preferably For 80~85% activated magnesia;And content of the nanoscale magnesium in the magnesia is 10~20wt%, it is preferably 15~20wt%.By using the exclusive property of some nanoparticles of nanoscale magnesium, denitrification efficiency can be improved. The formation of magnesium sulfate is so more beneficial for, so as to improve flue gas desulfurization and denitrification effect.In the present invention, the absorbent can be only Including magnesia, the modifying agent such as calcium oxide and silica can also be comprised additionally in.Modifying agent is micron order, nano level metal Oxide.In order to improve removal efficiency, absorbent of the invention is powdered.Its particle diameter can be 0.5~10 micron, be preferably 1~5 micron.Directly absorbent can so be mixed with flue gas, and then desulphurization denitration is carried out to flue gas, so as to not need greatly The desulphurization denitration of flue gas is completed in the case of measuring water, and does not produce a large amount of industrial wastes.For example, by absorbent dry powder and flue gas It is sufficiently mixed in flue, subsequently into absorption tower progress desulphurization denitration processing, the flue gas after desulphurization denitration is discharged by chimney.

Dry flue gas desulphurization denitration is carried out using above-mentioned catalyst and absorbent.The content of sulfur dioxide of the flue gas can be with For 300~40000mg/Nm3, be preferably 500~10000mg/Nm3, more preferably 1000~3000mg/Nm3.The flue gas Amount of nitrogen oxides can be 50~600mg/Nm3, be preferably 100~500mg/Nm3, more preferably 300~500mg/Nm3.Oxygen Gas content can be 10~25vol%, be preferably 15~18vol%.Temperature can be 95~160 DEG C;Preferably 120~135 ℃.In addition, the flow velocity of flue gas can be 2~5m/s, preferably 2.5~3.5m/s.Above-mentioned Gas Parameters represent smoke inlet The parameter at place;The parameter of smoke outlet is depending on practical sulphur removal denitration situation.Using above-mentioned technological parameter, be advantageous to obtain The accessory substance of steady quality, so as to be advantageous to the steady production of light concrete product.

<Blend step>

Accessory substance, light-weight aggregate, sand material, flyash, slag charge, building waste and optional additive are well mixed, so as to Form compound.According to an embodiment of the invention, by accessory substance, light-weight aggregate, sand material, flyash, slag charge, building waste It is well mixed with additive, so as to form mixture.

In the present invention, accessory substance, light-weight aggregate, sand material, flyash, slag charge, the weight proportion of building waste are 100~200: 80~200:80~200:120~200:100~200:60~100;Preferably 100~150:100~130:100~130: 150~180:120~150:80~90.Above-mentioned raw materials are controlled in above range, light concrete product can be fully ensured that Combination property.

In the present invention, light-weight aggregate can be selected from lytag, leca, haydites of book structure, gangue light-weight aggregate or One or more in 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.Gangue light-weight aggregate is obtained by raw material of gangue Light-weight aggregate.Cinder is thermal power plant, industry and civil boiler and the waste residue of the coal-fired discharge of other equipment, also known as clinker.Gently Gather materials preferably lytag, leca or haydites of book structure, more preferably haydites of book structure.So being advantageous to, which improves lightweight, mixes Coagulate the combination property of native product.

In the present invention, the sand material can be selected from normal sands.The slag charge can be selected from grain slag or slag, preferably steel Slag.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 the blast furnace slag molten condition It is placed in water and rapidly cools down and formed, thus is different from slag.Flyash is that catching is got off from the flue gas after coal combustion Fine ash, flyash are the primary solids wastes of coal-burning power plant's discharge.Building waste is using building waste as raw material, is crushed Solid waste.The present invention replaces lime stone using industrial solid wastes, significantly reduces light concrete product production cost, and ensures light The combination property of matter concrete product.

The raw material of the present invention can include additive.The weight proportion of accessory substance and additive can be 100~200:8~ 20, preferably 100~150:10~15.Additive can be selected from water reducer, early strength agent, retarder, foam stabilizer, air entraining agent, hate One or more in aqua;Preferably water reducer.The example of water reducer includes but is not limited to lignin water reducer, naphthalene sulfonic acids subtracts Aqua, benzene sulfonic acid class water reducer, water-soluble resin water reducer or polycarboxylate water-reducer.According to an embodiment of the invention, Additive is polycarboxylate water-reducer.

According to the specific embodiment of the present invention, the light-weight aggregate is haydites of book structure;The sand material is normal sands;Institute It is slag to state slag charge;And the additive is polycarboxylate water-reducer.

<Product molding step>

The product molding step of the present invention is to mix compound with industrial wastewater, then through being molded, vibrating, being stripped and supporting Shield, so as to form light concrete product.Industrial wastewater is the 50~90wt%, preferably 55~80wt% of accessory substance weight. The industrial wastewater of the present invention is preferably the industrial alkali waste water without organic matter.Industrial wastewater can be so made full use of, and is ensured The combination property of lightweight concrete.

Compound and industrial wastewater are thoroughly mixed to form and mix and stir material.In the state of former vibration, make to mix and stir material Mould is filled to predetermined cloth height, and forms horizontal plane.In the process, its adhesive attraction with mould will be overcome by mixing and stirring material Power, narrow die space is tamped as much as possible.By the strength vibration and pressurization of former, make to mix and stir material in mould Close shaping extremely has the base substrate of predetermined altitude.Knockout course is base substrate is deviate from from mould, then resets former, Prepare the operation of next molding cycle.In the present invention, it is preferred to shaken shaping for mould.Maintenance processes can be field curing or room Interior maintenance.During field curing, when temperature be less than 20 DEG C, must be just covered in plastic cloth on base substrate, so as to heat and moisture preserving;In inflammation The summer of heat then needs the maintenance that covered and sprinkled water with straw screen or mat.After the light concrete product stacking that field curing obtains, also to connect 10~14d of continuous maintenance.It is 20~60 DEG C that indoor maintenance, which then needs to control temperature, and humidity is 50~100%, conserves 10~28d.Institute Light concrete product is obtained to be 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 light concrete product of following examples is entered using GB/T15229-2011 and GB/T 4111-2013 Row measure.

Preparation example 1

By V2O5、CoO、Co2O3、Fe2O3、MnO2And KMnO4As active component, TiO2And ZrO2As carrier using leaching Stain method obtains catalyst.

Table 1, catalyst formulation

TiO2 56.0 parts by weight ZrO2 15.0 parts by weight V2O5 4.0 parts by weight CoO 5.0 parts by weight Co2O3 5.0 parts by weight Fe2O3 3.0 parts by weight MnO2 7.0 parts by weight KMnO4 5.0 parts by weight

Embodiment 1

(1) use the catalyst of preparation example 1 by the oxidizing sulfur dioxide of flue gas for sulfur trioxide, and by oxidation of nitric oxide For nitrogen dioxide, then using absorbent, (magnesium oxide powder, it contains 80wt% activated magnesia, nano oxidized content of magnesium For 15wt%) dry desulfurization denitration is carried out, so as to form accessory substance.Flow velocity is 3m/s, oxygen content 15vol%;Flue gas enters Mouthful other specification, the parameter of exhanst gas outlet as shown in tables 2 and 3.

(2) by accessory substance, light-weight aggregate (haydites of book structure), sand material (normal sands), flyash, slag charge (slag), building waste It is well mixed with additive (polycarboxylate water-reducer), so as to form compound.

(3) compound is mixed with industrial wastewater, then through being molded, vibrating, being stripped and conserving, so as to form lightweight concrete Product.The industrial wastewater is the industrial alkali waste water without organic matter.

Table 2, smoke inlet parameter

Sequence number Parameter Unit Numerical value 1 Inlet flue gas amount (operating mode) m3/h 160000 2 Inlet flue gas amount (mark condition wet basis) Nm3/h 105437 3 Inlet flue gas temperature 135 4 SO2Entrance concentration mg/Nm3 2200 5 Entrance nitric oxide concentration mg/Nm3 450 6 Humidity of flue gas % 5.8

Table 3, exhanst gas outlet parameter

Sequence number Project Quantity Unit 1 Exiting flue gas amount (operating mode) 98834 m3/h 2 Exhaust gas temperature 65 3 Sulfur dioxide emissioning concentration 37 mg/Nm3 4 Desulfuration efficiency 98.98 % 5 Discharged nitrous oxides concentration 43 mg/Nm3 6 Denitration efficiency 96.02 % 7 The quantum of output of accessory substance 5.43 t/h

Light concrete product material proportion and the performance test results such as table 4 and table 5.

The material proportion of table 4, light concrete product

Name of material Accessory substance Light-weight aggregate Normal sands Flyash Slag charge Building waste Additive Industrial wastewater Specification (g) 100 100 100 150 120 80 10 80

The test result of table 5, light concrete product

Density rating kg/m3 Grade strength MPa Water absorption rate % Contract with dry rate % 800 8 3.5 0.17

Embodiment 2

Material proportion except changing light concrete product, remaining condition are same as Example 1.Light concrete product Material proportion and the performance test results are referring to table 6 and table 7.

Table 6, light concrete product material proportion

Name of material Accessory substance Light-weight aggregate Normal sands Flyash Slag charge Building waste Additive Industrial wastewater Specification (g) 120 100 100 150 120 80 10 80

Table 7, light concrete product the performance test results

Density rating kg/m3 Grade strength MPa Water absorption rate % Contract with dry rate % 900 10 3.4 0.15

Embodiment 3

Material proportion except changing light concrete product, remaining condition are same as Example 1.Light concrete product Material proportion and the performance test results are referring to table 8 and table 9.

Table 8, light concrete product material proportion

Name of material Accessory substance Light-weight aggregate Normal sands Flyash Slag charge Building waste Additive Industrial wastewater Specification (g) 150 100 100 150 120 80 10 80

Table 9, light concrete product the performance test results

Density rating kg/m3 Grade strength MPa Water absorption rate % Contract with dry rate % 1000 12 3.2 0.12

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)

1. a kind of preparation method of light concrete product, it is characterised in that comprise the following steps:
(1) use catalyst by the oxidizing sulfur dioxide of flue gas for sulfur trioxide, and be nitrogen dioxide by oxidation of nitric oxide, so Dry desulfurization denitration is carried out using the absorbent containing magnesia afterwards, so as to form the pair that main component is sulfate and nitrate Product;
(2) accessory substance, light-weight aggregate, sand material, flyash, slag charge, building waste and optional additive are well mixed, so as to shape Into 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;
Wherein, the catalyst includes carrier and active component;The carrier is nanoscale amphoteric oxide, selected from TiO2、ZrO2 Or HfO2In one or more;The active component includes KMnO4And nanosize metal oxide, nano level metal oxidation Thing includes V2O5、CoO、Co2O3、Fe2O3And MnO2
2. preparation method according to claim 1, it is characterised in that:
In step (2), accessory substance, light-weight aggregate, sand material, flyash, slag charge, the weight proportion of building waste are 100~200:80 ~200:80~200:120~200:100~200:60~100;In step (3), the industrial wastewater is the accessory substance weight 50~90wt% of amount.
3. preparation method according to claim 2, it is characterised in that in step (2), the light-weight aggregate is selected from flyash ceramic One or more in grain, leca, haydites of book structure, gangue light-weight aggregate or cinder;The sand material is selected from normal sands;It is described Slag charge is selected from grain slag or slag;The additive is in water reducer, early strength agent, retarder, foam stabilizer, air entraining agent, hydrophober One or more.
4. preparation method according to claim 2, it is characterised in that in step (2), the light-weight aggregate is haydites of book structure; The sand material is normal sands;The slag charge is slag;The additive is polycarboxylate water-reducer.
5. according to the method for claim 2, it is characterised in that in step (3), the industrial wastewater is without organic matter Industrial alkali waste water.
6. according to the preparation method described in any one of Claims 1 to 5, it is characterised in that in step (1), based on 100 parts by weight Catalyst, the catalyst include following components:
7. according to the preparation method described in any one of Claims 1 to 5, it is characterised in that in step (1), based on 100 parts by weight Catalyst, the catalyst include following components:
8. preparation method according to claim 6, it is characterised in that in step (1), the magnesia include 70~ 85wt% activated magnesia, and content of the nanoscale magnesium in the magnesia is 10~20wt%.
9. preparation method according to claim 6, it is characterised in that in step (1), the absorbent also includes calcium oxide And silica.
10. preparation method according to claim 6, it is characterised in that in step (1), the sulfur dioxide of the flue gas contains Measure as 300~40000mg/Nm3, amount of nitrogen oxides be 50~600mg/Nm3, oxygen content be 10~25vol%, flow velocity 2 ~5m/s and temperature are 95~160 DEG C.
CN201710940532.7A 2017-09-30 2017-09-30 The preparation method of light concrete product CN107556046A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102824844A (en) * 2012-09-11 2012-12-19 北京世能中晶能源科技有限公司 Desulfurization and denitrification agent, preparation method and application thereof
CN103301749A (en) * 2013-06-21 2013-09-18 艾荻环境技术(上海)有限公司 Method for simultaneously performing desulfurization and denitrification on smoke gas
CN105859166A (en) * 2016-03-28 2016-08-17 北京中晶环境科技股份有限公司 Modified magnesium oxysulfate cement for foaming and foam material thereof
CN106512980A (en) * 2016-08-31 2017-03-22 上海奥威日化有限公司 Catalyst for producing sulfur trioxide from sulfur dioxide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102824844A (en) * 2012-09-11 2012-12-19 北京世能中晶能源科技有限公司 Desulfurization and denitrification agent, preparation method and application thereof
CN103301749A (en) * 2013-06-21 2013-09-18 艾荻环境技术(上海)有限公司 Method for simultaneously performing desulfurization and denitrification on smoke gas
CN105859166A (en) * 2016-03-28 2016-08-17 北京中晶环境科技股份有限公司 Modified magnesium oxysulfate cement for foaming and foam material thereof
CN106512980A (en) * 2016-08-31 2017-03-22 上海奥威日化有限公司 Catalyst for producing sulfur trioxide from sulfur dioxide

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