CN107805030A - Fibre cement product and its production method - Google Patents
Fibre cement product and its production method Download PDFInfo
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- CN107805030A CN107805030A CN201711064395.1A CN201711064395A CN107805030A CN 107805030 A CN107805030 A CN 107805030A CN 201711064395 A CN201711064395 A CN 201711064395A CN 107805030 A CN107805030 A CN 107805030A
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- magnesia
- flue gas
- fiber
- fume treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
- C04B28/105—Magnesium oxide or magnesium carbonate cements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/82—Solid phase processes with stationary reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Ceramic Engineering (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of fibre cement product and its production method.This method comprises the following steps：(1) sulfur dioxide in desulfurizing agent wet absorption flue gas is used, so as to form fume treatment slurry；Wherein, the desulfurizing agent is the slurries formed by magnesia and industrial wastewater；(2) fume treatment slurry, solid waste, magnesia, fiber and additive are mixed to form mixture；Wherein, the weight ratio of fume treatment slurry, solid waste, magnesia, fiber and additive is 50~80:25~38:3~25:5~20:0.5~15；(3) mixture is passed through into base and maintenance, so as to obtain the fibre cement product.The method of the present invention can remove the pollutants such as the sulfur dioxide in flue gas, and can also solve the process problem of industrial wastewater and industrial residue, building waste etc. recycles problem.
Description
Technical field
The present invention relates to a kind of fibre cement product and its production method, and in particular to directly uses fume treatment accessory substance
In the method for production fibre cement product, and the fibre cement product by its acquisition.
Background technology
The development of domestic and international construction industry is made a general survey of, insulation is always to realize the most effective measure of building energy conservation.Mesh
Before, the conventional insulation material in the country is polystyrene foam mould plate.Material low intensity in use, it is broken, repeat profit
With difficulty, environmental pollution is serious, and its is expensive.Cement fibrolite plate is because high, pollution-free and easy for construction with durability
The advantages that, turn into the focuses of energy-saving building materialses.
The solid waste maximum as discharge capacity, it is huge that industrial residue pollutes to caused by natural environment.Industry
Waste residue clean with recycling be all the time the research of vast Scientific Research Workers focus because it is directly connected to its people
Whether good economic heath cycle development is.The comprehensive utilization of industrial residue is combined with building material industry cleanly production and reached
Common recognition.
CN105503089A discloses a kind of preparation method of cement fibrolite plate, includes following components：Normal silicate water
50~100 parts of mud, 3~5 parts of binding agent, 6~7 parts of flyash, 9~12 parts of wood chip, 3~6 parts of water, 2~8 parts of waterproofing agent, diminishing
1~5 part of 0.5~2.0 part of agent and releasing agent.Gained cement fibrolite plate has that unit weight is light, cost is low, not easy to crack, water resistance
The advantages of good and demolding performace is good.But this method directly uses cement to considerably increase building material cost as raw material.
Therefore, present need exist for developing fibre cement product, it has lower cost, and can realize Industry Waste
Water, Industrial Solid Waste recycle.
The content of the invention
It is an object of the invention to provide a kind of production method of fibre cement product, and it has lower production cost.
It is another object of the present invention to provide a kind of fibre cement product, its is up-to-standard, can meet building materials requirement.
Inventors herein have recognized that fume treatment slurry is directly used in into production fibre cement product, can substantially reduce
Production cost.Specifically, the present invention includes herein below.
According to an aspect of the present invention, the production method of fibre cement product of the invention comprises the following steps：
(1) sulfur dioxide in desulfurizing agent wet absorption flue gas is used, so as to form fume treatment slurry；Wherein, it is described
Desulfurizing agent is the slurries formed by magnesia and industrial wastewater；
(2) fume treatment slurry, solid waste, magnesia, fiber and additive are mixed to form mixture；Wherein, cigarette
Gas disposal slurry, solid waste, magnesia, the weight ratio of fiber and additive are 50~80:25~38:3~25:5~20:
0.5~15；
(3) mixture is passed through into base and maintenance, so as to obtain the fibre cement product.
According to another aspect of the present invention, the production method of fibre cement product of the invention comprises the following steps：
(1) sulfur dioxide and nitrogen oxides in ozone and desulfurizing agent wet absorption flue gas are used, so as to be formed at flue gas
Manage slurry；Wherein, the desulfurizing agent is the slurries formed by magnesia and industrial wastewater；
(2) fume treatment slurry, solid waste, magnesia, fiber and additive are mixed to form mixture；Wherein, cigarette
Gas disposal slurry, solid waste, magnesia, the weight ratio of fiber and additive are 50~80:25~38:3~25:5~20:
0.5~15；
(3) mixture is passed through into base and maintenance, so as to obtain the fibre cement product.
In the above method of the present invention, it is preferable that the wet absorption is included in ambient humidity and contained more than 30%, flue gas
Moisture is between 10wt%~15wt% and keeps 40~70 DEG C of space, in the presence of having hydroxide ion making smelly
Chain reaction occurs for oxygen.
In the above method of the present invention, it is preferable that the sulfur dioxide in flue gas content is in 300~40000mg/Nm3
Between, amount of nitrogen oxides is in 0~600mg/Nm3Between, and oxygen content is between 8vol%~20vol%.
In the above method of the present invention, it is preferable that fume treatment slurry, solid waste, magnesia, fiber and additive
Weight ratio be 55~75:30~35:5~15:5~15:1~15.
The present invention the above method in, it is preferable that the magnesia be selected from magnesite light burnt powder, dolomite light burnt powder and
Analyze at least one of pure zirconia magnesium；The content of magnesia is in the magnesite light burnt powder and the dolomite light burnt powder
65wt%~85wt%.
In the above method of the present invention, it is preferable that the industrial wastewater is selected from the alkaline waste water that pH is 8~12 or pH is
1~6 acid waste water；The pH of the fume treatment slurry is 6.5~7.5.
In the above method of the present invention, it is preferable that the solid waste is selected from grain slag, slag, flyash and building rubbish
One or more in rubbish powder；The fiber is selected from glass fibre, wood pulp cellulose, bamboo pulp fiber, one kind or more of stalk fibre
Kind；The additive is selected from silicon rubber, phosphoric acid, dihydric phosphate, dibasic alkaliine, tartaric acid, tartrate or amino trimethylene
One or more in methylphosphonic acid.
In the above method of the present invention, it is preferable that it is 1 that the solid waste, which is selected from weight ratio,:1~3 slag and powder
Coal ash；The fiber is selected from wood pulp cellulose.
According to a further aspect of the invention, the present invention provides a kind of fibre cement product, and it is given birth to by any of the above-described
Production method obtains, and its rupture strength is 10~50MPa, and water absorption rate is 5~20%, and bulking factor is less than 0.3%.
The present invention utilizes the high value byproduct of fume treatment process generation and makes full use of industrial wastewater and Industrial Solid Waste
Fibre cement product is produced, thus belongs to integrative coordinated handling process.The present invention is clay by flue gas desulfurization technique and fiber water
Product production technology is synchronously carried out, and solves the problems, such as liquid waste processing caused by magnesium processes desulfurization.Present invention eliminates plate and frame filter press to remove
The process of slag, slurries are directly used in the production of fibre cement product, solve the intractable problem of sweetening solid discarded object.This hair
It is bright ensure solve the normal desulfurization condition of enterprise's flue gas under, make slag caused by enterprises, grey the like waste all obtain circulating again
Utilize, be that a kind of fibre cement product production line that not only saved is invested but also greatly reduces desulfurization operation cost, both ensures enterprise
Flue gas desulfurization facilities high-efficiency operation enables the energy-conserving and environment-protective technology of all kinds of discarded object cycling and reutilizations again.
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.In addition, " % " refers to based on weight
The percentage of amount, unless otherwise mentioned.In the present invention, " humidity of flue gas " has identical implication with " flue gas moisture content ".
The fibre cement product of the present invention is a kind of construction material, and specific example includes but is not limited to fiber cement board.
The production method of the fibre cement product of the present invention includes (1) fume treatment step；(2) blend step：(3) forming step.Under
Face describes in detail.
<Fume treatment step>
The fume treatment step of the present invention is using the sulfur dioxide in desulfurizing agent wet absorption flue gas, so as to form flue gas
Handle slurry；Or it is using the sulfur dioxide and nitrogen oxides in ozone and desulfurizing agent wet absorption flue gas, so as to form cigarette
Gas disposal slurry.
As described herein, " fume treatment slurry " refers to the slurry for flue gas formed after wet-treating using desulfurizing agent
Liquid uses ozone (O3) and desulfurizing agent the slurries that are formed after wet-treating are carried out to flue gas.The fume treatment of the present invention includes
But it is not limited to flue gas desulfurization and/or denitrating flue gas.As described herein, " desulfurization " is not strictly limited to only remove in flue gas
Sulfur dioxide, in addition to remove in some other common acidic oxides and common flue gas can be oxidized containing other or
The material of absorption, such as mercury, dust." denitration " represents to remove the nitrogen oxides in flue gas.
The desulfurizing agent of the present invention is the slurries that are formed by magnesia and industrial wastewater, the pair of the formation after such fume treatment
Product exists as a slurry.Magnesia can be in magnesite light burnt powder, dolomite light burnt powder and analysis pure zirconia magnesium
It is at least one；Preferably magnesite light burnt powder or dolomite light burnt powder.Desulfurizing agent cost can so be saved.Magnesite light burnt powder
Content with magnesia in dolomite light burnt powder can be 65wt%~85wt%, more preferably 70wt%~80wt%.
The industrial wastewater of the present invention can be alkaline waste water and/or acid waste water.The pH of alkaline waste water is 8~12, acid
The pH of waste water is 1~6.Slurries (desulfurizing agent) are mixed to form using such industrial wastewater and magnesium oxide powder, can so be filled
Divide and utilize industrial wastewater, solve its discharge and governing problem.
Before fume treatment, sulfur dioxide in flue gas content of the invention can be in 300~40000mg/Nm3Between,
Preferably 1000~2500mg/Nm3Between.Nitrogen oxides NOXContent is in 0~600mg/Nm3Between, preferably 200~500mg/
Nm3Between.Oxygen content is between 8vol%~20vol%, preferably 9~18vol%, more preferably 12~18vol%.Will
Flue gas is controlled in above range, can improve desulfurization and/denitration effect, and obtain the accessory substance of steady quality.According to the present invention
An embodiment, one or more of the flue gas in sintering machine, pelletizing and kiln；The preferably cigarette of sintering machine
Gas.
In certain embodiments, ozone of the invention processing and desulfurizing agent processing can be carried out simultaneously, or temporally first
After carry out.Preferably, carrying out ozone processing and then carrying out the processing of desulfurizing agent.In certain embodiments, also can be advanced
The processing of row desulfurizing agent, carry out ozone processing again afterwards.
In certain embodiments, ozone is used to aoxidize the lower nitrogen oxides (such as NO) in flue gas, and forms high price
Nitrogen oxides (such as NO2、N2O5Deng), and further it is desulfurized agent absorption.The dosage of the ozone can be according to the particular type of flue gas
And set, or set according to the content of NO in flue gas.In flue gas in the case of NO changes of contents, from the angle accurately controlled
The step of spending, in addition to monitor the content of NO in flue gas in real time, and ozone usage is adjusted according to the change of NO contents immediately.
In certain embodiments, the condition of ozone reaction is controlled, so as to further reduce the dosage of ozone.The condition
It is 40~70 DEG C including controlling flue-gas temperature, preferably 60~70 DEG C, dust content can be 30~50mg/Nm3, preferably 35~
45mg/Nm3；Relative humidity is more than 30%, and preferably greater than 40%；Flue gas moisture content is 10wt%~15wt%, is preferably
12wt%~13wt%.On this condition, ozone decomposed is slow, in addition, if slurries provide hydroxide ion in alkalescence, then it is wet
Degree, temperature and hydroxide ion content is particularly suitable decomposites more hydroxyl radical free radicals, and hydroxyl radical free radical is to compare ozone
The stronger material of oxidation susceptibility, can be quickly by oxidation of nitric oxide into nitrogen dioxide, so as to save ozone usage.Enter one
Step ground, hydroxyl radical free radical and the reaction of nitrogen oxides generation nitric acid and nitrous acid in flue gas.
Ozone can be obtained by any means or mode scene, such as be prepared using ozone and occurred with supply arrangement, ozone
Device generates ozone.The type of ozone generator has no particular limits, can be used it is well known in the art those.In ozone generator
In, the oxygen molecule in source of the gas is converted into ozone molecule through physically and/or chemically reacting.The source of the gas of ozone generator may be selected from liquid
Oxygen, gaseous state oxygen or air-source, preferably liquid oxygen.Liquid oxygen as ozone generator source of the gas, its purity be preferably 90wt% with
On, more preferably 99.5wt%.Ozone concentration in the product (being referred to as aliment) of ozone generator is preferably
2wt%~12wt%, more preferably 5wt%~10wt%.In certain embodiments, the ozone in ozone supply apparatus passes through
Ozone delivery pump and ozone transfer pipeline are delivered to ozone steam oxidation reaction layer.Ozone delivery pump and ozone transfer pipeline
Quantity and arrangement have no particular limits, and pump well known in the art and circuit design can be used.
In certain embodiments, the slurries for making the flue gas into desulfurizing tower be sprayed first with the first absorption spraying layer connect
Touch, to absorb the part sulfur dioxide in flue gas, and absorption product corresponding to formation.In ozone steam oxidation reaction layer, profit
With the lower nitrogen oxides in ozone oxidation flue gas, and form higher nitrogen oxides.Preferably, in ozone steam oxidation reaction layer
In, sprinkler part is atomized by ozone and ejects ozone downwards.Atomizing spray technique does not have used by the flue gas oxidation step
Have special limitation, can be used it is well known in the art those.According to one embodiment of the invention, sprayed using stainless steel nozzle
Penetrate ozone.According to one embodiment of the invention, make flue gas from the bottom to top by ozone steam oxidation reaction layer.Ozone steam
The process conditions of oxidation reaction layer as it was previously stated, repeat no more here.
In certain embodiments, from ozone supply means to ozone steam oxidation reaction layer ozone supply.According to this hair
A bright embodiment, ozone, and the ozone that will be generated by ozone delivery pump are generated in ozone generator by source of the gas
It is delivered to ozone steam oxidation reaction layer.The source of the gas of ozone generator is selected from liquid oxygen, gaseous state oxygen or air-source, preferably liquid
Oxygen.Liquid oxygen as ozone generator source of the gas, its purity are preferably 99.5%.The ozone concentration of ozone generator generation is preferred
For 2wt%~12wt%, more preferably 5wt%~10wt%.
In certain embodiments, flue gas desulfurization step of the invention include making flue gas by ozone steam oxide layer and
Others absorb spraying layer, and the slurries of containing sulfate and/or nitrate are obtained after wet absorption as fume treatment slurry, are leaned on
Own wt to fall into serum recycle deposit groove.
The fume treatment step of the present invention can include pulping stage.Before desulfurization process is carried out, make magnesia and work
Industry waste water mixes, so as to prepare desulfurizing agent (slurries).The dosage of magnesia and industrial wastewater is not particularly limited, under normal circumstances
The weight of magnesia and industrial wastewater ratio is 1:8~10, such as 1:9.Utilize the dioxy in the desulfurizing agent wet absorption flue gas
Change sulphur and/or nitrogen oxides.
<Blend step>
The blend step of the present invention is to be mixed to form fume treatment slurry, solid waste, magnesia, fiber and additive
Mixture.Fume treatment slurry comes from fume treatment step.When slurry pH is 6.5~7.5, discharge it, and for producing
Fibre cement product.Fume treatment slurry is directly used to produce fibre cement product by the present invention, so as to omit accessory substance
Concentration and crystallization processes, reduce production cost.
In the present invention, the weight ratio of fume treatment slurry, solid waste, magnesia, fiber and additive is 50~80:
25~38:3~25:5~20:0.5~15.According to an embodiment of the invention, fume treatment slurry, solid waste, oxygen
The weight ratio for changing magnesium, fiber and additive is 55~75:30~35:5~15:5~15:1~15.Each raw material is controlled upper
Scope is stated, may further ensure that the performance of fibre cement product.
In certain embodiments, solid waste includes flyash, and it is under the catching in the flue gas after coal combustion
The fine ash come, flyash are the primary solids wastes of coal-burning power plant's discharge.In certain embodiments, solid waste includes steel
Slag, it is the slag of steel-making discharge, is divided into vessel slag, open hearth slag, electroslag according to the type of furnace.In certain embodiments, solid waste
Comprising grain slag, it rapidly cools down and formed for the blast furnace slag of molten condition is placed in water, thus is different from slag.Some
In embodiment, solid waste includes building waste powder, and it is that the solid waste formed is crushed by raw material of building waste.
The solid waste of the present invention can be selected from the one or more in grain slag, slag, flyash, building waste powder；It is excellent
Elect the combination of the combination of grain slag and flyash, slag and flyash as.According to one embodiment of the invention, the solid gives up
It is 1 that thing, which is selected from weight ratio,:1~3 slag and flyash.
The fiber of the present invention can be selected from glass fibre, wood pulp cellulose, bamboo pulp fiber, the one or more of stalk fibre；
Preferably wood pulp cellulose, bamboo pulp fiber；For example, wood pulp cellulose.Such fiber be more suitable for fume treatment slurry compositions, from
And improve fibre cement product performance.
Additive of the present invention can be selected from silicon rubber, phosphoric acid, dihydric phosphate, dibasic alkaliine, tartaric acid, tartrate
Or the one or more in ATMP；Preferably dihydric phosphate or dibasic alkaliine.
Above-mentioned raw materials can be well mixed using any mixed media or mode known in the art.In some embodiment party
In case, the mixing includes fume treatment slurry is put into stainless steel first, and being then put into solid in required ratio gives up
Thing, magnesia, the process of fiber and additive.In certain embodiments, the mixing includes first being put into solid waste
In stainless steel, the process of fume treatment slurry, magnesia, fiber and additive is then put into required ratio.At other
In embodiment, the mixing includes including fume treatment slurry, solid waste, magnesia, fiber and addition by the desired amount of
The raw materials such as agent are put into the process of stainless steel simultaneously.The example of the stainless steel include, but are not limited to agitator, homogenizer,
Mixer etc..
In certain embodiments, blend step can include the process of lapping of solid waste.The example of grinding is included in
Material ball ratio is 1:60~180min of controlled lapping under conditions of 9~11, preferably 80~100min, so as to obtain solid waste.
Solid waste after grinding can reach 400m2/ kg~600m2/ kg specific surface area.
<Forming step>
The forming step of the present invention is that the mixture is passed through into base and maintenance, so as to obtain fibre cement product.Example
Such as, said mixture is starched into the techniques such as base, vacuum dehydration, the shaping of shaping bucket, trimming and stacking through excessively stream and obtains fibre cement
The first base of plate.The first base prepared is put into curing kilns to be conserved.Maintenance in temperature can be 20~60 DEG C and humidity be 50~
100% time progress.For example, temperature be 30~60 DEG C and humidity be 60~80% times carry out 10~15 hours.Maintenance is stripped
Fiber cement board using sanding processing equipment carry out sanding processing, then packed by packing machine.
<Fibre cement product>
Fibre cement product can stably be produced using the above method.Fibre cement product, also known as Cement fibre system
Product, it is using silicone grease matter, calcareous material as New Building Materials made of main material.The example bag of the fibre cement product of the present invention
Include but be not limited to fiber cement board.Each raw material and its proportioning as it was previously stated, repeat no more here.
The product of the present invention is preferably made of the following raw material：Fume treatment slurry, solid waste, magnesia, fiber and
Additive；Their weight ratio is 50~80:25~38:3~25:5~20:0.5~15；Preferably 55~75:30~35:5
~15:5~15:1~15.According to the specific embodiment of the present invention, the fiber is wood pulp cellulose；The additive is
Sodium dihydrogen phosphate；It is 1 that the solid waste, which is selected from weight ratio,:1~3 slag and flyash.
The rupture strength of the fibre cement product of the present invention can be 10~50MPa, be preferably 15~25MPa；Water absorption rate
It can be 5~20%, be preferably 8~15%；Bulking factor can be less than 0.3%, preferably less than 0.2%.
" part " in following preparation example and embodiment represents parts by weight, unless specifically stated otherwise.Unless specifically stated otherwise, make below
Raw material, process conditions used in standby example and embodiment are described as follows：
Desulfurizing agent：The slurries that magnesium oxide powder is formed with alkaline waste water, the weight ratio of the two are 1:9.
- alkaline waste water：From chemical plant, its pH is 10 or so.
- flyash：Acid flyash (AFA), main component：50wt%SiO2, 25wt%Al2O3, 9wt%CaO.
- slag charge：Slag, main component：50wt%SiO2, 12wt%A12O3, 9wt%Fe2O3, 16wt%CaO.
- fiber：Wood pulp cellulose.
- additive：Sodium dihydrogen phosphate.
It should be noted that the purity of workable raw material is not most important.It is suitable and cheap that many outsourcing materials can be used as
Raw material.
The performance of following examples fibre cement product is tested using JC/T412.1-2006, and according to GB/T
5464-1999 tests noninflammability, and other performances are tested according to GB/T 7019-1997.
Preparation example 1
Desulfurizing agent is made in magnesium oxide powder addition alkaline waste water, and delivers to desulfurizing tower.(oxygen content is flue gas
18vol%) enter desulfurizing tower from the gas approach of desulfurizing tower, after three layers absorb spraying layer, sulfur dioxide gas is desulfurized
Agent fully absorbs.Desulfurizing agent forms the absorption product of containing magnesium sulfate after sulfur dioxide absorption, and (temperature is 30 DEG C, density is
1.2t/m3), it is introduced into by Action of Gravity Field in desulfurizing tower in slurries circulating slot in the tower of bottom.Slurries circulating slot in tower
The slurries on top deliver to three layers of absorption spraying layer respectively, and the internal circulating load of three accounts for the 50vt% of output total amount.Serum recycle in tower
The pH of the slurries of groove bottom is expelled to holder after reaching 6.5, as fume treatment slurry.Flue gas is handled by demisting, from cigarette
Chimney directly discharges.Shown in the following Tables 1 and 2 of flue gas desulfurization operating mode.
Table 1, Desulfurization parameter
| Sequence number | Project | Quantity | Unit |
| 1 | Inlet flue gas amount (operating mode) | 1036975 | m3/h |
| 2 | Entrance standard state exhaust gas volumn | 693858 | m3/h |
| 3 | Inlet temperature | 135 | ℃ |
| 4 | Sulfur dioxide entrance concentration | 1950 | mg/Nm3 |
| 5 | Entrance dust concentration | 106 | mg/Nm3 |
| 6 | Magnesium sulphur ratio | 1.05 | |
| 7 | Humidity of flue gas | 11 | Wt% |
Table 2, desulfurization emission behaviour
| Sequence number | Project | Quantity | Unit |
| 1 | Exiting flue gas amount (operating mode) | 754856 | m3/h |
| 2 | Export standard state exhaust gas volumn | 632134 | m3/h |
| 3 | Exhaust gas temperature | 53 | ℃ |
| 4 | Sulfur dioxide emissioning concentration | 40 | mg/Nm3 |
| 5 | Desulfuration efficiency | 98.13 | % |
| 6 | Export dust concentration | 9 | mg/Nm3 |
Embodiment 1
By the fume treatment slurry of the gained of preparation example 1, slag (the specific surface area 500m collected from steel mill2/ kg), come from
Flyash, magnesia, fiber and the additive mixing of coal-burning boiler, stir 30 minutes and obtain mixture.The mixture is made
First base, it is 30 DEG C in temperature, humidity conserves 10 hours under conditions of being 60%, and the demoulding, sanding obtain fibre cement product.Formula
Referring to table 3.The performance test results are referring to table 4.
Table 3, fibre cement product formula
| Specification | Fume treatment slurry | Slag charge | Flyash | Magnesia | Additive | Fiber |
| kg | 60 | 15 | 15 | 10 | 1 | 10 |
Table 4, fibre cement product performance
Embodiment 2
Except the formula using table 5, remaining condition are same as Example 1.The performance test results are referring to table 6.
Table 5, fibre cement product formula
| Specification | Fume treatment slurry | Slag charge | Flyash | Magnesia | Additive | Fiber |
| kg | 65 | 15 | 20 | 10 | 1 | 5 |
Table 6, fibre cement product performance
| Sequence number | Classification | Test result |
| 1 | Density/(g/cm3) | 1.19 |
| 2 | Water absorption rate/% | 9.6 |
| 4 | Impermeability | Without wet trace after 24h inspections |
| 5 | Bulking factor/% | 0.15 |
| 6 | Rupture strength/MPa | 18.5 |
| 7 | Frost resistance | Through 25 Frozen-thawed cycled crack-frees, layering |
| 8 | Noninflammability | A1 |
Embodiment 3
Except the formula using table 7, remaining condition are same as Example 1.The performance test results are referring to table 8.
Table 7, fibre cement product formula
| Specification | Fume treatment slurry | Slag charge | Flyash | Magnesia | Additive | Fiber |
| kg | 70 | 15 | 15 | 10 | 1.5 | 10 |
Table 8, fibre cement product performance
| Sequence number | Classification | Test result |
| 1 | Density/(g/cm3) | 1.25 |
| 2 | Water absorption rate/% | 8.7 |
| 4 | Impermeability | Without wet trace after 24h inspections |
| 5 | Bulking factor/% | 0.14 |
| 6 | Rupture strength/MPa | 17.9 |
| 7 | Frost resistance | Through 25 Frozen-thawed cycled crack-frees, layering |
| 8 | Noninflammability | A1 |
Preparation example 2
Desulfurizing agent is made in magnesium oxide powder addition alkaline waste water, and delivers to desulfurizing tower.(oxygen content is flue gas
18vol%) enter desulfurizing tower from the gas approach of desulfurizing tower, after first layer absorbs spraying layer, flue-gas temperature is reduced,
Part sulfur dioxide gas is absorbed.Then, flue gas enters ozone steam absorbed layer, and nitric oxide is oxidized to dioxy herein
Change the nitrogen oxides of the high-valence state such as nitrogen and dinitrogen pentoxide, the slurries that spraying layer ejection is absorbed by the second layer absorb, while dioxy
Change sulphur to continue to be absorbed in this region.Finally, remaining a small amount of sulfur dioxide and nitrogen oxides are absorbed by third layer and sprayed in flue gas
The slurries that drenching layer sprays absorb.By demisting, flue gas directly discharges through chimney.Desulfurizing agent forms sulfur-bearing after sulfur dioxide absorption
(temperature is 30 DEG C to the absorption product of sour magnesium and magnesium nitrate, density 1.2t/m3), position in desulfurizing tower is introduced into by Action of Gravity Field
In slurries circulating slot in the tower of bottom.The slurries on slurries circulating slot top deliver to three layers of absorption spraying layer, three respectively in tower
Internal circulating load account for output total amount 50vt%.The pH of the slurries of slurries circulating slot bottom is expelled to holder after reaching 6.5 in tower,
As fume treatment slurry.Flue gas is handled by demisting, is directly discharged from chimney.Flue gas desulfurization operating mode such as table 9 below and the institute of table 10
Show.
Table 9, Desulfurization parameter
| Sequence number | Project | Quantity | Unit |
| 1 | Inlet flue gas amount (operating mode) | 1086592 | m3/h |
| 2 | Entrance standard state exhaust gas volumn | 704607 | m3/h |
| 3 | Inlet temperature | 148 | ℃ |
| 4 | Sulfur dioxide entrance concentration | 1940 | mg/Nm3 |
| 5 | Nitrogen oxides entrance concentration | 405 | mg/Nm3 |
| 6 | Entrance dust concentration | 98 | mg/Nm3 |
| 7 | Magnesium sulphur ratio | 1.05 | |
| 8 | Humidity of flue gas | 9.3 | Wt% |
Table 10, desulfurizing item emission behaviour
| Sequence number | Project | Quantity | Unit |
| 1 | Exiting flue gas amount (operating mode) | 805697 | m3/h |
| 2 | Export standard state exhaust gas volumn | 691683 | m3/h |
| 3 | Exhaust gas temperature | 45 | ℃ |
| 4 | Sulfur dioxide emissioning concentration | 39 | mg/Nm3 |
| 5 | Desulfuration efficiency | 98.03 | % |
| 6 | Discharged nitrous oxides concentration | 36 | mg/Nm3 |
| 7 | Denitration efficiency | 91.27 | % |
| 8 | Export dust concentration | 8.3 | mg/Nm3 |
Embodiment 4
By the fume treatment slurry of the gained of preparation example 2, slag (the specific surface area 500m collected from steel mill2/ kg), come from
Acid flyash, magnesia, fiber and the additive mixing of coal-burning boiler, stir 30 minutes and obtain mixture.By the mixture
Just base is made, is 30 DEG C in temperature, humidity conserves 10 hours under conditions of being 60%, is stripped, and sanding obtains fibre cement product.
Formula is referring to table 11.The performance test results are referring to table 12.
Table 11, fibre cement product formula
| Specification | Fume treatment slurry | Slag charge | Flyash | Magnesia | Additive | Fiber |
| kg | 65 | 15 | 15 | 10 | 1 | 5 |
Table 12, fibre cement product performance
| Sequence number | Classification | Test result |
| 1 | Density/(g/cm3) | 1.18 |
| 2 | Water absorption rate/% | 8.7 |
| 4 | Impermeability | Without wet trace after 24h inspections |
| 5 | Bulking factor/% | 0.16 |
| 6 | Rupture strength/MPa | 18.5 |
| 7 | Frost resistance | Through 25 Frozen-thawed cycled crack-frees, layering |
| 8 | Noninflammability | A1 |
Embodiment 5
Except the formula using table 13, remaining condition are same as Example 4.The performance test results are referring to table 14.
Table 13, fibre cement product formula
| Specification | Fume treatment slurry | Slag charge | Flyash | Magnesia | Additive | Fiber |
| kg | 70 | 15 | 15 | 5 | 1.5 | 5 |
Table 14, fibre cement product performance
| Sequence number | Classification | Test result |
| 1 | Density/(g/cm3) | 1.32 |
| 2 | Water absorption rate/% | 9.5 |
| 4 | Impermeability | Without wet trace after 24h inspections |
| 5 | Bulking factor/% | 0.21 |
| 6 | Rupture strength/MPa | 16.8 |
| 7 | Frost resistance | Through 25 Frozen-thawed cycled crack-frees, layering |
| 8 | Noninflammability | A1 |
Embodiment 6
Except the formula using table 15, remaining condition are same as Example 4.The performance test results are referring to table 16.
Table 15, fibre cement product formula
| Specification | Fume treatment slurry | Slag charge | Flyash | Magnesia | Additive | Fiber |
| kg | 75 | 15 | 20 | 5 | 1 | 15 |
Table 16, fibre cement product performance
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 fibre cement product, it is characterised in that comprise the following steps：
(1) sulfur dioxide in desulfurizing agent wet absorption flue gas is used, so as to form fume treatment slurry；Wherein, the desulfurization
Agent is the slurries formed by magnesia and industrial wastewater；
(2) fume treatment slurry, solid waste, magnesia, fiber and additive are mixed to form mixture；Wherein, at flue gas
The weight ratio for managing slurry, solid waste, magnesia, fiber and additive is 50~80:25~38:3~25:5~20:0.5~
15；
(3) mixture is passed through into base and maintenance, so as to obtain the fibre cement product.
2. a kind of production method of fibre cement product, it is characterised in that comprise the following steps：
(1) sulfur dioxide and nitrogen oxides in ozone and desulfurizing agent wet absorption flue gas are used, so as to form fume treatment slurry
Material；Wherein, the desulfurizing agent is the slurries formed by magnesia and industrial wastewater；
(2) fume treatment slurry, solid waste, magnesia, fiber and additive are mixed to form mixture；Wherein, at flue gas
The weight ratio for managing slurry, solid waste, magnesia, fiber and additive is 50~80:25~38:3~25:5~20:0.5~
15；
(3) mixture is passed through into base and maintenance, so as to obtain the fibre cement product.
3. according to the method for claim 2, it is characterised in that the wet absorption be included in ambient humidity more than 30%,
Humidity of flue gas is between 10wt%~15wt% and keeps 40~70 DEG C of space, there is situation existing for hydroxide ion
Under make ozone occur chain reaction.
4. method according to claim 1 or 2, it is characterised in that the sulfur dioxide in flue gas content 300~
40000mg/Nm3Between, amount of nitrogen oxides is in 0~600mg/Nm3Between, and oxygen content 8vol%~20vol% it
Between.
5. method according to claim 1 or 2, it is characterised in that fume treatment slurry, solid waste, magnesia, fiber
Weight ratio with additive is 55~75:30~35:5~15:5~15:1~15.
6. method according to claim 1 or 2, it is characterised in that the magnesia is selected from magnesite light burnt powder, dolomite
At least one of light burnt powder and analysis pure zirconia magnesium；Magnesia in the magnesite light burnt powder and the dolomite light burnt powder
Content is 65wt%~85wt%.
7. method according to claim 1 or 2, it is characterised in that the industrial wastewater is selected from the alkalescence that pH is 8~12 and given up
Water or the acid waste water that pH is 1~6；The pH of the fume treatment slurry is 6.5~7.5.
8. method according to claim 1 or 2, it is characterised in that the solid waste is selected from grain slag, slag, flyash
With the one or more in building waste powder；The fiber is selected from glass fibre, wood pulp cellulose, bamboo pulp fiber, stalk fibre
It is one or more；The additive be selected from silicon rubber, phosphoric acid, dihydric phosphate, dibasic alkaliine, tartaric acid, tartrate or
One or more in ATMP.
9. method according to claim 1 or 2, it is characterised in that it is 1 that the solid waste, which is selected from weight ratio,:1~3
Slag and flyash；The fiber is selected from wood pulp cellulose.
10. a kind of fibre cement product, it is characterised in that it is obtained by the production method described in any one of claim 1~9
, its rupture strength is 10~50MPa, and water absorption rate is 5~20%, and bulking factor is less than 0.3%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252252A (en) * | 2019-06-21 | 2019-09-20 | 辽宁北环净化技术有限公司 | A kind of preparation method of NGFX dry desulfurization absorption brick |
Citations (3)
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|---|---|---|---|---|
| CN104478255A (en) * | 2014-12-08 | 2015-04-01 | 辽宁科技大学 | Magnesium oxysulfate cement containing magnesium oxide desulfurization waste liquor and preparation method thereof |
| 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 |
| CN106467387A (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 magnesium sulfate foamed bricks |
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2017
- 2017-11-02 CN CN201711064395.1A patent/CN107805030A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478255A (en) * | 2014-12-08 | 2015-04-01 | 辽宁科技大学 | Magnesium oxysulfate cement containing magnesium oxide desulfurization waste liquor and preparation method thereof |
| 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 |
| CN106467387A (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 magnesium sulfate foamed bricks |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252252A (en) * | 2019-06-21 | 2019-09-20 | 辽宁北环净化技术有限公司 | A kind of preparation method of NGFX dry desulfurization absorption brick |
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