CN107628802A - The production method of fibre cement product based on carbide slag desulphurization denitration - Google Patents
The production method of fibre cement product based on carbide slag desulphurization denitration Download PDFInfo
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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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
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Abstract
The present invention discloses a kind of production method of the fibre cement product based on carbide slag desulphurization denitration.The desulfurization denitrification agent being made up of carbide slag and magnesia addition industrial alkaline waste water is prepared into desulfurization denitrification agent slurries；Make desulfurizing agent denitration grout and ozone and specific smoke contacts；Slurries are discharged when the pH value of slurries reaches prescribed limit, obtain desulphurization denitration slurries；Raw material comprising desulphurization denitration slurries, industrial solid wastes particle and fibrous material is mixed, it is 2~10wt% to make the solid content in gained compound；It is molded compound and conserves to obtain fibre cement product.The present invention can solve the atmosphere polluting problem that sulfur dioxide and nitrogen oxides are brought.Moreover it is possible to solve the process problem of alkaline industrial waste water and industrial residue recycles problem.
Description
Technical field
The present invention relates to the manufacture method of fibre cement product, and in particular to desulphurization denitration slurries based on carbide slag and its
His waste produces the method for fibre cement product.
Background technology
In recent years, the construction industry in China is fast-developing, growing day by day for the demand of fibre cement product, wherein fiber water
Mud plate with its fire-proof insulation, waterproof and dampproof, heat-insulating sound-insulating, it is light high-strength, safe and harmless, suitability for secondary processing is good the characteristics of, quilt
It is widely used in the fire protection flame retarding of the cable works in intensive place such as domestic all kinds of power plants, chemical enterprise, and megastore,
The public place such as hotel, hotel, file guild hall, closed garment market, market for manufactured goods turned out by light industry, cinema interior decoration fire protection flame retarding work
The optimal applied fireproofing of journey.
CN101736853A discloses a kind of method for producing fiber cement board as a trial using high doping quantity of fly ash, is copied using
Production is followed the example of without a large amount of flyash and appropriate biological power plant residual dust is added on the basis of asbestos fibre cement plate, manufactures non-pressurised water
Mud fiberboard, production cost can be reduced on the basis of the target of high-content fly ash is realized, solve trade waste and bring
Environment influence.But due in China's industrial production environment composition of raw materials be difficult to form effective proportioning, biological power plant is built
It is located at China and still falls within starting stage, and scale is smaller, thus this method can not still be popularized in an all-round way.Meanwhile this method pair
There is larger requirement in the granular size of flyash, can also increase cost in actual application.
CN 106186917A disclose a kind of cement plate for building, have good fire protecting performance, good endurance.But
Because density is high, formula is complicated, easily occurs the unstable phenomenon of properties of product in commercial process is carried out.
The A of CN 105198344 disclose a kind of method that fiber cement board is prepared using diatomite, but due to diatomite
Porosity and extensibility are high, and it is not preferred feedstock in the manufacture of cement plate to cause the raw material.
Although above-mentioned document improves in terms of the production of fiber cement board with modification, its main original produced
Material is still cement.Larger gap is still suffered from terms of this energy-saving and environmental protection.
The content of the invention
It is an object of the invention to provide a kind of production method of the fibre cement product based on carbide slag desulphurization denitration.This
Invention is carried out at desulphurization denitration by the cooperation of carbide slag, magnesia and ozone oxidation process to the flue gas of predetermined substance composition
Reason.The method of the present invention can also produce to obtain qualified fibre cement product simultaneously.There is currently preferred method desulfurization to take off
The characteristics of nitre agent dosage is small, cost is low, removal efficiency is high, stable.Specifically, the present invention includes herein below.
A kind of production method of the fibre cement product based on carbide slag desulphurization denitration, it comprises the following steps：
(1) pulping stage：The desulphurization denitration that will be made up of 60~80 parts by weight carbide slags and 20~40 parts by weight magnesia
Agent adds the industrial wastewater that pH value is 7~10 and prepares desulfurization denitrification agent slurries；
(2) flue gas desulfurization and denitrification step：Make desulfurization denitrification agent slurries, ozone and the smoke contacts；Two in the flue gas
Sulfur oxide content is 1000mg/Nm3Hereinafter, amount of nitrogen oxides 600mg/Nm3Hereinafter, and oxygen content be 10~
20vol%, be absorbed slurries；
(3) plasma discharge step：Slurries are discharged when the pH value for absorbing slurries is down to 5.3~6.8, obtain desulphurization denitration slurries,
The content of magnesium sulfate is 3~25wt% in the desulphurization denitration slurries；
(4) blend step：Desulphurization denitration slurries, 30~50 parts by weight industrial solids described in 100~200 parts by weight will be included
The raw material of waste particles and 1~10 percent by weight fiber material mixes, and obtains compound, and in the compound solid content be 2~
10wt%；
(5) blanks and moulding and conserving step：The compound is molded, and is 20~50 DEG C in temperature, humidity is 50~100%
Conserved in environment.
Method in accordance with the invention it is preferred that the content of calcium hydroxide is more than 80wt% in the carbide slag.
Method in accordance with the invention it is preferred that the reaction temperature of ozone described in step (2) and the flue gas is 40~70
℃。
Method in accordance with the invention it is preferred that the concentration of ozone is 1~15wt% in step (2).
Method in accordance with the invention it is preferred that in step (4), magnesium sulfate, or addition sulfuric acid are added into the slurries of discharge
And magnesia, the content for making magnesium sulfate in desulphurization denitration slurries are 3~25wt%.
Method in accordance with the invention it is preferred that the particle diameter of the industrial solid wastes particle is more than 200 mesh.
Method in accordance with the invention it is preferred that the industrial solid wastes are selected from clinker, slag, steel slag and iron slag and useless ash
In one or more.
Method in accordance with the invention it is preferred that the fibrous material is selected from aramid fiber, Orlon fiber, polyester fiber, Buddhist nun
Imperial fiber, vinylon fiber, polypropylene fibre, polyimide fiber, cotton fiber, wood pulp cellulose, glass fibre, carbon fiber, boron
One or more in fiber, whisker, asbestos fibre and metallic fiber.
Method in accordance with the invention it is preferred that the raw material in the step (4) further comprises that 5~10 parts by weight are added
Agent.
Method in accordance with the invention it is preferred that the additive is selected from silicon rubber, phosphoric acid, dihydric phosphate, the hydrogen of phosphoric acid one
One or more in salt, tartaric acid, tartrate and ATMP.
Desulfurizing agent containing carbide slag is applied to flue gas desulfurization and denitrification, denitrification efficiency by the production method of the present invention
It is high.The method of the present invention produces to obtain the fibre cement product of higher economic value simultaneously, realizes the recycling of waste resource, drops
Low environment pollutes, and mitigates enterprise operation burden.
Embodiment
With reference to specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to
This.
In the present invention, unless otherwise stated, " part " refers to the number based on weight, " % " and " wt% " refers to be based on
The percentage of weight." vol% " refers to the percentage based on volume.
The problem of production cost is too high or properties of product are not high, the present invention are still had in being produced for existing fibre cement
People has made intensive studies in terms of using solid waste as main material production fibre cement product.It was found that using by being based on
The performance that the flue gas desulfurization and denitrification slurries of carbide slag and ozone produce the product obtained during fibre cement product is unstable.Production
The requirement that some products can not be up to state standards.Find to be partly because titanium dioxide in flue gas after further further investigation
The content of the compositions such as sulphur is unstable, causes resulting fibre cement product performance disunity.In order to utilize specific flue gas
And other wastes mass-produce the unified acceptable fiber cement products of performance, the present inventor has carried out creativeness to production technology
System optimization so that the obtained fibre cement product of production complies fully with even more than national standard.Specifically, it is of the invention
Production method include (1) pulping stage, (2) flue gas desulfurization and denitrification step, (3) plasma discharge step, (4) blend step, (5) shaping
Curing step.The following detailed description of each step.
Pulping stage：
Included desulfurization denitrification agent addition industrial wastewater preparing desulfurization denitrification agent slurries according to the pulping stage of the present invention, its
Middle desulfurization denitrification agent is made up of 60~80 parts by weight carbide slags and 20~40 parts by weight magnesia.The pH value of industrial wastewater be 7~
10.The amount ratio of desulfurization denitrification agent and industrial wastewater, is not particularly limited.Preferably, the weight of desulfurization denitrification agent and industrial wastewater
Amount is than being 1:5~10, preferably 1:9, the desulfurization denitrification agent slurries of this concentration are advantageous to sulfur dioxide in flue gas and nitrogen oxides
Absorption.
The carbide slag of the present invention is by calcium carbide main component CaC2Reacted with water caused.Carbide slag slurry it is main
Composition is Ca (OH)2, its alkalescence is stronger, and pH value is typically in the range of 10~12.Preferably, in carbide slag calcium hydroxide content
For more than 80wt%.
The present invention magnesia (MgO) selected from magnesite light burnt powder, dolomite light burnt powder, analysis pure zirconia magnesium at least
It is a kind of.The content of magnesia is 65%-85% in preferable magnesite light burnt powder and the dolomite light burnt powder.Preferably, oxygen
Change in magnesium comprising at least 50wt% activated magnesia, more preferably at least 60wt% activated magnesia.
Carbide slag and magnesia are preferably powdered granule thing in the present invention.It is highly preferred that the granularity of carbide slag and magnesia
More than 200 mesh.The carbide slag of granularity within this range, particle is smaller, and specific surface area is larger, is advantageous to improve ozone, desulfurization
Absorption of the denitrfying agent to flue gas.Be advantageous to improve simultaneously to sulfur dioxide in flue gas (SO2) and nitrogen oxides (NOX) absorption work(
Can, the further efficiency for improving desulphurization denitration.
Flue gas desulfurization and denitrification step：
The flue gas desulfurization step of the present invention includes making the desulfurizer slurry, ozone and smoke contacts.Two in the flue gas
Sulfur oxide content is 1000mg/Nm3Hereinafter, amount of nitrogen oxides 600mg/Nm3Hereinafter, and oxygen content be 10~
20vol%.
In the present invention, the temperature of desulphurization denitration is preferably 40~70 DEG C.In this temperature range is advantageous to ozone and flue gas
NOXReaction, generate higher nitrogen oxides, so as to be advantageous to improve denitration efficiency.Ozone can be supplied by ozone generator
Into desulphurization denitration equipment.Preferably, ozone concentration is in 1~15wt%, preferably in the range of 5~10wt%.From economy and take off
From the aspect of nitre efficiency, more preferably ozone concentration is 10wt%.Described ozone concentration refers to smelly as caused by ozone generator
The concentration of oxygen.
According to the present invention, the content of sulfur dioxide in flue gas is 1000mg/Nm3Hereinafter, such as 900mg/Nm3Below.This hair
In bright, amount of nitrogen oxides can be 600mg/Nm3Hereinafter, such as 500mg/Nm3Below.On the other hand, sulfur dioxide in flue gas
Content be preferably 500mg/Nm3More than, such as 700mg/Nm3More than.The content of sulfur dioxide is too low, then raw in desulfurization slurry
Into magnesium sulfate content deficiency, influence production fibre cement product performance.
In accordance with the present production process, it is preferable that the content of oxygen is 10~20vol% in flue gas.In the range of this
Oxygen content is advantageous to sulphite, and further reaction is oxidized to sulfate.Oxygen content is too low, the desulfurization slurry sulfite produced
Salt is too high, and the performance for being unfavorable for fibre cement product improves.In certain embodiments, in order to improve the content of oxygen in flue gas,
Oxygenation means can be used.For example, air or oxygen is blasted into flue gas.Any means known in the art can be used to flue gas
In blast air or oxygen.
It should be noted that the scope of above-mentioned content of sulfur dioxide, amount of nitrogen oxides and oxygen content refers to enter desulfurization
Content in the flue gas of denitration device.With the progress of desulfurization and denitrification reaction in equipment, above-mentioned content can be reduced gradually.
Plasma discharge step：
Be absorbed slurries after above-mentioned desulphurization denitration step.With the progress of desulphurization denitration, the pH for absorbing slurries drops
It is low.Slurries are discharged when the pH value for absorbing slurries is down to 5.3~6.8 scopes, when preferably 5.5~6.0, obtain desulphurization denitration slurries.
When pH value reaches the scope in slurries, on the one hand the content of magnesium sulfate is higher in absorption slurry, is advantageous to the property of resulting product
It can improve.On the other hand the desulfurization denitrification agent slurries more renewed by plasma discharge are advantageous to keep high desulfuration efficiency.In the present invention,
Preferably, the concentration of magnesium sulfate is 3~25wt%, more preferably 10~20wt% in the desulphurization denitration slurries.It can pass through
Magnesium sulfate, or the mode of addition sulfuric acid and magnesia are added to make desulphurization denitration slurries reach above-mentioned magnesium sulfate concentration.Some
In embodiment, the sulfuric acid of addition and the addition mol ratio of magnesia are preferably 1:1~2, more preferably 1:1.2~1.8.Herein
In the range of magnesia ratio it is higher, the fibre cement product intensity of production is higher, and anti-fragility is good.
Blend step：
Blend step of the present invention includes that desulphurization denitration slurries, 30~50 parts by weight works described in 100~200 parts by weight will be included
The raw material of industry solid waste particle and 1~10 percent by weight fiber material mixes, and obtains compound.In the present invention, it is preferable that described
5~10 parts by weight additives can also be included in compound.
In the present invention, the solid content of the compound is 2~10wt%, preferably 4~8wt%.Solid content in compound
For realizing that the performance of resulting product of the present invention is most important.The solid content in the compound can be controlled by adding water.
The industrial solid wastes of the present invention are preferably the one or more in clinker, slag, steel slag and iron slag and useless ash.Preferably, this hair
Bright industrial solid wastes include clinker and/or slag.In certain embodiments, useless ash of the invention is selected from flyash, stone
One or more in cream powder, dolomite dust and shale powder, preferably flyash.
Industrial solid wastes according to the present invention are particle, it is preferable that control the particle diameters of industrial solid wastes 200 mesh with
On.Because the slag charge granularity of separate sources is larger and granularity heterogeneity is, it is necessary to carry out powdered and homogenization.It is therefore preferred that
Also include the process for being ground industrial solid wastes such as slag charge before the mixing of the present invention, to ensure particle diameter in 200 mesh
More than.
According to one or more of the fibrous material of the present invention in organic fiber, inorfil and natural fiber.Have
The example of machine fiber includes but is not limited to aramid fiber, Orlon fiber, polyester fiber, nylon fiber, vinylon fiber, polypropylene
Fiber, polyimide fiber etc..The example of inorfil includes but is not limited to glass fibre, carbon fiber, boron fibre, whisker, stone
Cotton fiber and metallic fiber etc..The example of natural fiber includes but is not limited to cotton fiber, sisal hemp, paper, wood cellulose fibers, wood pulp
Fiber etc..One or more combinations of above-mentioned fiber can be used in the present invention.
The present invention additive be selected from silicon rubber, phosphoric acid, dihydric phosphate, dibasic alkaliine, tartaric acid, tartrate and
One or more in ATMP.Preferably, the additive is selected from dihydric phosphate or dibasic alkaliine, excellent
Elect sodium dihydrogen phosphate or disodium-hydrogen as.
The mixing apparatus of the present invention can be single shaft mixer, double-shaft mixer or mixer.Preferably, it is of the invention mixed
Conjunction equipment is mixer.
Blanks and moulding and conserving step：
The blanks and moulding and conserving step of the present invention includes being molded the compound, and is 20~50 DEG C in temperature, humidity 50
Conserved in~100% environment.
In certain embodiments, any method can be used in shaping of the invention, including copy and follow the example of, slurry flowing process, paving slurry processes,
The methods of die pressing and semidry method.Of the invention preferably copy is followed the example of.The illustrative examples followed the example of are copied to comprise the following steps：
Loosened wood-fibred with loosening apparatus, wood pulp is made by fiberizer etc. and is mixed with unclassified stores, obtains compound
Slurry.According to laminator technological requirement, then after mixed slurry is watered is diluted to finite concentration, the net of laminator is squeezed into feeding engine
In case, the stainless steel filter screen wheel in net cage filters out water, and solid wet feed is gone into felt with copying to follow the example of, then will by format roll
Solid wet feed stacks up in layer, is cut off after reaching setting thickness, so as to form the wet blanket of fibre cement, then by wet blanket
With piler code into a pile, it is sent into press and pressurize closely knit, reach the panel density of setting.
In certain embodiments, curing step of the invention includes the wet blanket of fibre cement after pressurization being put into maintenance
Room conserves.Curing temperature is 20~50 DEG C, and humidity is 50~100%.
It should be noted that the flue gas of the present invention may be from the one or more in sintering machine, pelletizing and kiln.As long as cigarette
Content of sulfur dioxide, amount of nitrogen oxides and oxygen content be in above-mentioned prescribed limit in gas, then the not specific source for limiting flue gas.
The fiber water that the flue gas desulfurization and denitrification slurries of the present invention and the combination of specified raw material and specific amount ranges obtain production is clay
Product meet required performance requirement.
It should also be noted that, in the flue gas desulfurization and denitrification step of the present invention, be oxidized when ozone and NO react for
NO2Or N2O5Etc. the nitrogen oxides of high-valence state, the nitrogen oxides of these high-valence states is easily absorbed by water or alkaline matter, so as to promote
Enter denitrification process.In addition, above-mentioned oxidizing process also generates oxygen, it is sulfate that it, which further promotes sulfite oxidation,.Therefore,
Desulfurizing agent based on carbide slag acts on ozone cooperative, promotes the progress of desulphurization denitration.
Embodiment 1
(1) waste water is added (to come from chemical plant, its pH starches 10) to be mixed and made into desulfurization denitrification agent magnesia powder and carbide slag
Liquid.The component and part of wherein desulfurization denitrification agent is：65 parts of carbide slag, 35 parts of magnesia.Wherein desulfurization denitrification agent is with giving up
The weight ratio of water is 1:9.
(2) making flue gas and desulfurization denitrification agent slurries and ozone (initial concentration 5wt%), reverse contact generation physical chemistry anti-
Should be absorbed slurries.Desulphurization denitration duty parameter is referring to table 1.
The Desulfurization parameter of table 1
| Sequence number | Parameter | Unit | Numerical value |
| 1 | Inlet flue gas amount (operating mode) | m3/h | 900000 |
| 2 | Inlet flue gas amount (mark condition) | Nm3/h | 602206 |
| 3 | Inlet flue gas temperature | ℃ | 135 |
| 4 | Sulfur dioxide entrance concentration | mg/Nm3 | 600 |
| 5 | Nitrogen oxides entrance concentration | mg/Nm3 | 300 |
| 6 | Entrance flue dust | mg/Nm3 | 80 |
| 7 | Humidity of flue gas | Wt% | 4.7 |
(3) slurries in recycle slurry liquid pool are expelled to instead by excavationg pump when the pH value of recycle slurry liquid pool reaches 6.0
Groove is answered, obtains desulphurization denitration slurries, then adds sulfuric acid and magnesia (mol ratio 1:1.5) sulphur in desulphurization denitration slurries is adjusted
The content of sour magnesium is to 10.2wt%.
(4) fibre cement product is produced, is comprised the following steps that：
By 5 parts by weight additives (dihydric phosphate), 45 parts by weight industrial solid castoffs (flyash, from power plant,
Main component：50wt%SiO2, 25wt%Al2O3, 9wt%CaO；Fineness is more than 200 mesh), 135 parts by weight desulphurization denitration slurries,
7 part by weight of cellulose reinforcing fibers (wood pulp cellulose) mix, and add water to obtain compound, and make solid content in compound be 4%.
Wood-fibred, desulphurization denitration slurries, industrial solid castoff are handled according to technological requirement, and pressed as requested
The wet base of fiber cement board of different densities processed.Product after pressurization is conserved.Curing temperature is 50 DEG C, humidity 80%.
The desulfurization off sulfide effect of embodiment 1 is shown in Table 2, and the performance test results of the fibre cement product of embodiment 1 are shown in Table 3.
Embodiment 2
In addition to using following step or formula, fibre cement product is produced in the same manner as example 1.
Each component is well mixed according to formula as below, obtains desulfurizing agent.
Magnesia (its active oxidation content of magnesium is 70wt%) 40 mass parts
Carbide slag：(mesh of particle diameter 200, sieving rate are more than 95%) 60 mass parts
The content of magnesium sulfate is adjusted to 12.1wt% in desulphurization denitration slurries.
The raw material for producing fibre cement product is as follows：
The parts by weight of solid waste composition granule 30, the parts by weight of desulphurization denitration slurry 140, cellulose that particle diameter is more than 200 mesh increase
The strong parts by weight of fiber 10 and the parts by weight of additive 8, solid content is 7% in compound.
The desulfurization off sulfide effect of embodiment 2 is shown in Table 2, and the performance test results of the fibre cement product of embodiment 2 are shown in Table 3.
Embodiment 3
In addition to using following step or formula, fibre cement product is produced in the same manner as example 1.
Each component is well mixed according to formula as below, obtains desulfurizing agent.
Magnesia (wherein active oxidation content of magnesium is 70wt%)：20 mass parts
Carbide slag：(particle diameter 200, sieving rate are more than 95%) 80 mass parts
The content of magnesium sulfate is adjusted to 9.5wt% in desulphurization denitration slurries.
The raw material for producing fibre cement product is as follows：
Particle diameter is more than the parts by weight of solid waste composition granule 35, the parts by weight of desulphurization denitration slurry 120, polyester fiber 5 of 200 mesh
Parts by weight, solid content is 8% in compound.
The desulfurization off sulfide effect of embodiment 3 is shown in Table 2, and the fiber cement board performance test results of embodiment 3 are shown in Table 3.Using
JC/T412.1-2006 is tested the fibre cement product of each embodiment.
The flue gas desulfurization effect statistical form of 2 each embodiment of table
| Gas Parameters | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Exiting flue gas amount (operating mode) (Nm3/h) | 654498 | 639087 | 689901 |
| Exhaust gas temperature (DEG C) | 54 | 57 | 54 |
| SO2Entrance concentration (mg/Nm3) | 600 | 600 | 600 |
| SO2Exit concentration (mg/Nm3) | 15 | 11 | 12 |
| Desulfuration efficiency (%) | 97.7 | 98.4 | 98.1 |
| Inlet nitrogen oxides concentration (mg/Nm3) | 300 | 300 | 300 |
| Discharged nitrous oxides concentration (mg/Nm3) | 14 | 15 | 17 |
| Denitration efficiency (%) | 95.8 | 95.6 | 96.2 |
| Export dust concentration (mg/Nm3) | 10 | 15 | 11 |
| Efficiency of dust collection (%) | 88.7 | 83.4 | 86.9 |
| The quantum of output (t/h) of accessory substance | 4.6 | 4.1 | 5.1 |
The performance test results of the fibre cement product of 3 each embodiment of table
From table 2 and 3, method of the invention can high-efficiency desulfurization denitration, and the property of the fibre cement product produced
Energy testing result meets the regulation of relevant national standard and is higher than market like product.
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 production method of the fibre cement product based on carbide slag desulphurization denitration, it is characterised in that comprise the following steps：
(1) pulping stage：The desulfurization denitrification agent being made up of 60~80 parts by weight carbide slags and 20~40 parts by weight magnesia is added
Enter the industrial wastewater that pH value is 7~10 and prepare desulfurization denitrification agent slurries；
(2) flue gas desulfurization and denitrification step：Make desulfurization denitrification agent slurries, ozone and the smoke contacts；Titanium dioxide in the flue gas
Sulfur content is 1000mg/Nm3Hereinafter, amount of nitrogen oxides 600mg/Nm3Hereinafter, and oxygen content is 10~20vol%, is obtained
To absorption slurries；
(3) plasma discharge step：Slurries are discharged when the pH value for absorbing slurries is down to 5.3~6.8, obtain desulphurization denitration slurries, it is described
The content of magnesium sulfate is 3~25wt% in desulphurization denitration slurries；
(4) blend step：Desulphurization denitration slurries, 30~50 parts by weight industrial solid wastes described in 100~200 parts by weight will be included
The raw material of particle and 1~10 percent by weight fiber material mixes, and obtains compound, and in the compound solid content be 2~
10wt%；
(5) blanks and moulding and conserving step：The compound is molded, and is 20~50 DEG C in temperature, humidity is 50~100% environment
In conserved.
2. production method according to claim 1, it is characterised in that the content of calcium hydroxide is in the carbide slag
More than 80wt%.
3. production method according to claim 2, it is characterised in that ozone described in step (2) is anti-with the flue gas
It is 40~70 DEG C to answer temperature.
4. production method according to claim 3, it is characterised in that the concentration of ozone is 1~15wt% in step (2).
5. production method according to claim 4, it is characterised in that in step (4), sulfuric acid is added into the slurries of discharge
Magnesium, or addition sulfuric acid and magnesia, the content for making magnesium sulfate in desulphurization denitration slurries are 3~25wt%.
6. production method according to claim 5, it is characterised in that the particle diameter of the industrial solid wastes particle is more than
200 mesh.
7. production method according to claim 6, it is characterised in that the industrial solid wastes are selected from clinker, slag, steel
One or more in slag, scum and useless ash.
8. production method according to claim 7, it is characterised in that it is fine that the fibrous material is selected from aramid fiber, Orlon
Dimension, polyester fiber, nylon fiber, vinylon fiber, polypropylene fibre, polyimide fiber, cotton fiber, wood pulp cellulose, glass
One or more in fiber, carbon fiber, boron fibre, whisker, asbestos fibre and metallic fiber.
9. production method according to claim 8, it is characterised in that the raw material in the step (4) further comprises 5~
10 parts by weight additives.
10. production method according to claim 9, it is characterised in that the additive is selected from silicon rubber, phosphoric acid, phosphoric acid
One or more in dihydric salt, dibasic alkaliine, tartaric acid, tartrate and ATMP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711064347.2A CN107628802A (en) | 2017-11-02 | 2017-11-02 | The production method of fibre cement product based on carbide slag desulphurization denitration |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103055689A (en) * | 2013-01-09 | 2013-04-24 | 浙江大学 | Desulfurization absorption liquid capable of simultaneously stabilizing bivalent mercury |
| CN104857835A (en) * | 2015-06-05 | 2015-08-26 | 北京中晶佳镁环境科技股份有限公司 | Integrated flue gas treatment device and method |
| CN106467370A (en) * | 2015-08-19 | 2017-03-01 | 北京中晶环境科技股份有限公司 | A kind of magnesium processes desulfurization produces the device and method of cement |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055689A (en) * | 2013-01-09 | 2013-04-24 | 浙江大学 | Desulfurization absorption liquid capable of simultaneously stabilizing bivalent mercury |
| CN104857835A (en) * | 2015-06-05 | 2015-08-26 | 北京中晶佳镁环境科技股份有限公司 | Integrated flue gas treatment device and method |
| CN106467370A (en) * | 2015-08-19 | 2017-03-01 | 北京中晶环境科技股份有限公司 | A kind of magnesium processes desulfurization produces the device and method of cement |
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