CN107573000A - The method of flue gas desulfurization and denitrification manufacture fibre cement product based on red mud - Google Patents
The method of flue gas desulfurization and denitrification manufacture fibre cement product based on red mud Download PDFInfo
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Abstract
The invention discloses a kind of method of the flue gas desulfurization and denitrification manufacture fibre cement product based on red mud, including：Make flue gas desulfurization and denitrification agent slurries, ozone and smoke contacts, wet method removes the sulfur dioxide and nitrogen oxides in flue gas, so as to form desulphurization denitration accessory substance slurry；Wherein, flue gas desulfurization and denitrification agent slurries are the slurries formed by fume treatment agent and industrial wastewater, and fume treatment agent includes 50~100 parts by weight red muds, 5~30 parts by weight magnesia and 5~25 parts by weight of sodium hydroxide；When the pH value of desulphurization denitration accessory substance slurry reaches 6.5~7.5, the desulphurization denitration accessory substance slurry and magnesia, Industrial Solid Waste, fiber and additive are mixed to form mixed material；Mixed material is prepared into just base, maintenance and drying, so as to obtain fibre cement product.The method of the present invention effectively can utilize industrial waste on the basis of flue gas desulfurization and denitrification, realize recycling economy.
Description
Technical field
The present invention relates to a kind of manufacture method of fibre cement product, and in particular to a kind of by red mud desulphurization denitration accessory substance
The method that slurry is directly used in manufacture fibre cement product.
Background technology
Building board of the fiber cement board as a kind of high-strength light, in China, development time is shorter, but hair in recent years
Exhibition is quickly.Because have the characteristics that fire prevention, it is moistureproof, durable, deformation it is small, have been widely used at present in building construction and industrial building
Field.In field of house buildings, such a sheet material is mainly used in indoor partition metope, furred ceiling, ceiling, ground laying etc..Through
It is special to fabricate and after external coating, exterior wall cladding or exterior wall thick china etc. are may be used as, and can be used for inside and outside wall thermal insulation
And permanent formwork.In industrial construction field, because such a sheet material has the characteristic of fire-proof high-temperature resistant, it can be used for power plant cigarette
The furnace wall of the equipment such as road, boiler, chemical pipeline insulation, industrial dry kiln and the shifting board of steamer etc..
In recent years, China is built using sustainability as an important deliberated index to product, construction and mankind's activity
It is certainly no exception to build material product.To make China's fibre cement board industry continue to keep the booming impetus, this journey is realized
The sustainable development of industry and the sustainability of this based article, with reference to the actual conditions in China, develop a kind of recycling economy, waste returns
Receipts utilize technique, and China's building trade can be promoted fast-developing.
In terms of flue gas desulfurization and denitrification, also there is greater advance.CN200510100019.4 discloses one kind and applies ethylenediamine
The method for closing cobalt and urea wet flue gas pick-ups and deliveries, this method using triethylenediamine cobalt solution by NO catalysis oxidations be containing
Nitronic acid radical ion, using urea as nertralizer, effectively denitration and wet desulphurization are combined togather, but the denitration of this method
Efficiency is not sufficiently stable, easily by SO2Concentration influences.CN93114569.4 discloses a kind of formula for producing lightweight fibre-cement slab,
The formula includes cement, vinylon fibre, perlite, sepiolite, mica, paper pulp, glass fibre.This method complicated component, to useless
The utilization rate of gurry is relatively low, and industrialized production is more difficult.
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 red mud desulphurization denitration, it can
Effectively to utilize Industrial Solid Waste and industrial wastewater, sulfur dioxide and nitrogen oxides in flue gas are effectively removed, and take off using desulfurization
Nitre accessory substance and other Industrial Solid Wastes are as main material production fibre cement product, and cost is low, and denitrification efficiency is high, operation
It is stable.
The purpose of the present invention is achieved by the following technical solution.
A kind of method of the flue gas desulfurization and denitrification manufacture fibre cement product based on red mud, comprises the following steps：
(1) flue gas desulfurization and denitrification agent slurries, ozone and smoke contacts are made, wet method removes the sulfur dioxide and nitrogen oxygen in flue gas
Compound, so as to form desulphurization denitration accessory substance slurry；Wherein, the flue gas desulfurization and denitrification agent slurries are by fume treatment agent and work
The slurries that industry waste water is formed, the fume treatment agent include 50~100 parts by weight red muds, 5~30 parts by weight magnesia and 5~25
Parts by weight of sodium hydroxide；
(2) when the pH value of desulphurization denitration accessory substance slurry reaches 6.5~7.5, by the desulphurization denitration accessory substance slurry with
Magnesia, Industrial Solid Waste, fiber and additive are mixed to form mixed material；Wherein, the desulphurization denitration accessory substance slurry, oxidation
Magnesium, Industrial Solid Waste, the weight ratio of fiber and additive are 100:15~35:10~25:5~20:5~15；
(3) mixed material is prepared into just base, maintenance and drying, so as to obtain the fibre cement product.
Method in accordance with the invention it is preferred that in step (1), the ozone is supplied by ozone generator, and ozone occurs
Ozone concentration caused by device is 1~15wt%.
Method in accordance with the invention it is preferred that in step (1), the fume treatment agent include 60~80 parts by weight red muds,
15~25 parts by weight magnesia and 5~15 parts by weight of sodium hydroxide.
Method in accordance with the invention it is preferred that in step (1), the sulfur dioxide in flue gas content 300~
3000mg/Nm3Between, amount of nitrogen oxides is in 100~500mg/Nm3, and oxygen content is between 10~20vol%.
Method in accordance with the invention it is preferred that in step (2), desulphurization denitration accessory substance slurry, magnesia, Industrial Solid Waste,
The weight of fiber and additive ratio is 100:18~30:10~20:12~18:5~10.
Method in accordance with the invention it is preferred that in step (1) and step (2), it is light-burned that the magnesia is selected from magnesite
At least one of powder, dolomite light burnt powder and analysis pure zirconia magnesium；And the oxygen in magnesite light burnt powder and dolomite light burnt powder
It is respectively 65wt%~85wt% to change content of magnesium.
Method in accordance with the invention it is preferred that in step (2), the Industrial Solid Waste is selected from clinker, slag, steel slag and iron slag
With the one or more in useless ash；The additive be selected from silicon rubber, phosphoric acid, dihydric phosphate, dibasic alkaliine, tartaric acid,
One or more in tartrate and ATMP；The fiber is selected from wood pulp cellulose, glass fibre, poly- third
At least one of alkene, polyacrylonitrile, lignin and hydroxypropyl methyl cellulose.
Method in accordance with the invention it is preferred that in step (2), it is 1~2 that the Industrial Solid Waste, which is selected from weight ratio,:1~2
Clinker and flyash；The additive is dihydric phosphate；And the fiber is wood pulp cellulose.
Method in accordance with the invention it is preferred that in step (2), the mixing comprises the following steps：By desulphurization denitration by-product
Thing slurry, magnesia, Industrial Solid Waste, fiber and additive stir 10~60min, shape under 1200~2000r/min rotating speed
Into the mixed material.
Method in accordance with the invention it is preferred that in step (3), the forming step also includes after drying process
Fiber cement board carries out the step of sanding processing.
The method of the present invention prepares the wet method of fume treatment agent progress flue gas using industrial wastewater and solid waste red mud
Desulphurization denitration, and obtained desulphurization denitration accessory substance is made into industrial residue, give up grey the like waste for manufacturing fibre cement product
All obtain cycling and reutilization, be it is a kind of not only saved the investment of fibre cement board assembly line and greatly reduce desulphurization denitration run into
Originally, not only ensure flue gas desulfurization and denitrification facility high-efficiency operation but also enable the green, energy-conservation, ring of all kinds of discarded object cycling and reutilizations
Guarantor's technology, overcome in traditional fibre cement plate production process using cement as primary raw material and caused by high energy consumption, the wasting of resources
The problem of, the fiber cement board produced by the present invention can add substantial amounts of trade waste, and main composition
It is cheap for desulphurization denitration accessory substance, significantly reduce the cost of production.
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, " % " or " wt% " is
Refer to the percentage based on weight, unless otherwise mentioned.
The manufacture method of the fibre cement product of the present invention includes (1) flue gas desulfurization and denitrification step；(2) material mixing step
Suddenly：(3) blanks and moulding and conserving step.Introduce in detail below.
<Flue gas desulfurization and denitrification step>
The present invention uses flue gas desulfurization and denitrification agent slurries, ozone and smoke contacts, and wet method removes the sulfur dioxide in flue gas
And nitrogen oxides, so as to form desulphurization denitration accessory substance slurry.The conventional equipment in this area can be used to carry out flue gas desulfurization to take off
Nitre, repeat no more here.
In the present invention, the flue gas desulfurization and denitrification agent slurries are the slurries formed by fume treatment agent and industrial wastewater, institute
Stating fume treatment agent includes 50~100 parts by weight red muds, 5~30 parts by weight magnesia and 5~25 parts by weight of sodium hydroxide.It is preferred that
Ground, the fume treatment agent include 60~80 parts by weight red muds, 15~25 parts by weight magnesia, 5~15 parts by weight of sodium hydroxide.
According to an embodiment of the invention, the fume treatment agent can be only by the red mud, magnesia and hydrogen-oxygen of above-mentioned parts by weight
Change sodium composition.Using the fume treatment agent of the present invention, the effect of flue gas desulfurization and denitrification can be improved.
The red mud of the present invention can contain offscum in alkali selected from alumina producing discharge, and its component is not particularly limited.Example
Such as, the red mud can include following component：6~50wt% of calcium oxide, 2~10wt% of sodium oxide molybdena, 5~20wt% of aluminum oxide,
3~25wt% of 5~50wt% of iron oxide and silica.It so can further improve desulfurization off sulfide effect.The red mud
The basicity of attached liquid is 3000~15000mg/L, preferably 5000~10000mg/L.It so can further improve red mud and its
The synergy of his component, so as to improve desulfurization off sulfide effect.
The present invention prepares flue gas desulfurization and denitrification agent slurries using industrial wastewater, so as to solve the discharge of industrial wastewater and improvement
Problem.The industrial wastewater can be the alkaline industrial waste water that pH value is 8~12, the alkalescence industry that preferably pH value is 11~12
Waste water.In the present invention, the weight ratio of fume treatment agent and water can be 1:8~10, preferably 1:9.
The magnesia of the present invention can be in magnesite light burnt powder, dolomite light burnt powder and analysis pure zirconia magnesium at least
It is a kind of；Preferably magnesite light burnt powder or dolomite light burnt powder.Magnesia contains in magnesite light burnt powder and dolomite light burnt powder
Amount can be 65~85wt%, more preferably 70~80wt%.So be advantageous to obtain the stable fibre cement product of property.This
The sodium hydroxide of invention can use industrial sodium hydroxide.
Before desulphurization denitration is carried out to flue gas, sulfur dioxide in flue gas content of the invention can be in 300~3000mg/
Nm3Between, preferably 800~1600mg/Nm3Between.Amount of nitrogen oxides is in 100~500mg/Nm3, preferably 300~
460mg/Nm3.Oxygen content is between 8~22vol%, preferably 12~18vol%.Reached to reach oxygen content in flue gas
To the scope of the present invention, oxygenation means can be used, such as air or oxygen is blasted into flue gas.By the state modulator of flue gas upper
Scope is stated, desulfurization off sulfide effect can be improved, and obtains the desulphurization denitration accessory substance slurry of steady quality.The flue gas of the present invention
Dust content can be 25~80mg/Nm3, preferably 30~50mg/Nm3Scope, so as to provide ozone and NOXOptimal reaction
Environment.The temperature of the flue gas of the present invention is at 80~150 DEG C, preferably 90 DEG C~120 DEG C.According to one embodiment of the present invention
Formula, one or more of the flue gas in coal-burning boiler, sintering machine, pelletizing and kiln；It is preferred from coal-burning boiler or sintering machine.
The content of oxygen present in above-mentioned flue gas, sulfur dioxide and nitrogen oxides is moderate.
In the present invention, ozone can be supplied into desulphurization denitration equipment by ozone generator.Preferably, ozone concentration is 1
~15wt%, preferably in the range of 5~10wt%.From the aspect of economy and denitration efficiency, more preferably ozone concentration is
10wt%.Described ozone concentration refers to the concentration of the ozone as caused by ozone generator.The temperature of ozone and smoke reaction is excellent
Selected control system is at 40~70 DEG C, and ambient humidity is more than 30%.Be advantageous to ozone and the NO in flue gas in this temperature rangeXReaction,
Higher nitrogen oxides are generated, so as to be advantageous to improve denitration efficiency.
In the present invention, when the pH of desulphurization denitration accessory substance slurry reaches 6.5~7.5, more preferably 7, discharge it, should
For next step.
<Material blend step>
Above-mentioned pH is reached into 6.5~7.5 desulphurization denitration accessory substance slurry and magnesia, Industrial Solid Waste, fiber and added
Agent is added to be mixed to form mixed material；Wherein, the weight of desulphurization denitration accessory substance slurry, magnesia, Industrial Solid Waste, fiber and additive
Amount is than being 100:15~35:10~25:5~20:5~15.Preferably, desulphurization denitration accessory substance slurry, magnesia, Industrial Solid
The weight ratio of useless, fiber and additive is 100:18~30:10~20:12~18:5~10.
In the present invention, the magnesia is also selected from magnesite light burnt powder, dolomite light burnt powder and analysis pure zirconia magnesium
At least one；And the content of magnesia in magnesite light burnt powder and dolomite light burnt powder is respectively 65wt%~85wt%.
In the present invention, the Industrial Solid Waste can be selected from slag charge, useless ash or building waste etc., for example, can be selected from clinker,
One or more in slag, steel slag and iron slag and useless ash.The slag charge can come from power plant, steel mill, stove caused by chemical plant
Slag, slag, steel slag and iron slag etc..The useless ash can be the equipment such as power plant, the coal-burning boiler of steel mill, sintering machine, shaft furnace, pelletizing
The ash of deduster bottom discharge afterwards.According to an embodiment of the invention, the Industrial Solid Waste includes slag charge and useless ash, institute
It can be flyash to state useless ash.Preferably, the Industrial Solid Waste is that weight ratio is 1~2:1~2 clinker and flyash.It is preferred that
Ground, the Industrial Solid Waste have 400m2/ kg~600m2/ kg specific surface area, such as compare table to above-mentioned by milled processed
Area.
In the present invention, the additive is selected from silicon rubber, phosphoric acid, dihydric phosphate, dibasic alkaliine, tartaric acid, winestone
One or more in hydrochlorate and ATMP.Preferably, the additive is selected from phosphoric acid, dihydric phosphate, phosphorus
One or more in sour monohydric salt, tartaric acid, tartrate and aminotrimethylene phosphoric acid.It is highly preferred that the additive
For dihydric phosphate or dibasic alkaliine.
In the present invention, the fiber is selected from wood pulp cellulose, glass fibre, polypropylene, polyacrylonitrile, lignin or hydroxypropyl
At least one of methylcellulose.Preferably, the fiber is wood pulp cellulose.
In the present invention, above-mentioned raw materials can be well mixed using any mixed media or mode known in the art.This
The example for inventing the stainless steel used includes but is not limited to mixing apparatus single shaft mixer, double-shaft mixer or mixer, and
Preferably mixer.An embodiment of the invention, the blend step specifically may include steps of：By desulphurization denitration
Accessory substance slurry, magnesia, Industrial Solid Waste, fiber and additive are in 1200~2000r/min, preferably 1400~1800r/min
Rotating speed under stir 10~60min, preferably 25~45min, form the mixed material.
Using the mixed method of the present invention, the uniform mixing of each material is more beneficial for, obtains performance more preferably fibre cement
Product.
<Blanks and moulding and conserving step>
The blanks and moulding and conserving step of the present invention includes first base preparation process, curing step and drying steps.First base preparation process
Can be that the mixed material is starched into the technical process such as base, vacuum dehydration, the shaping of shaping bucket, trimming and stacking, system through excessively stream
It is standby to obtain fiber cement board just base.The first base of fiber cement board is put into curing kilns and conserved, then is dried through drying equipment.Institute
State the step of forming step can also include dry fiber cement board carrying out sanding processing.
Fibre cement product after sanding can cut into the size of needs as requested, and be wrapped by packing machine
Dress.Those cutting machines well known in the art and packing machine can be used, is repeated no more here.According to one embodiment of the present invention
Formula, the specification of fiber cement board is that length is 4880mm, and width is 1220mm~2440mm, and thickness is 4~30mm.
Fibre cement product can stably be produced using the above method.In the present invention, it is preferable that the fiber water is clay
The rupture strength of product is 5~20MPa, more preferably 10~18MPa；Water absorption rate is 15~35%, more preferably 18~30%；It is wet
Swollen rate is 0.2~0.5%；Noninflammability is A levels.
" part " in following examples represents parts by weight, unless specifically stated otherwise.Unless specifically stated otherwise, institute in following examples
The raw material that uses, process conditions are described as follows：
Flue gas desulfurization and denitrification agent slurries：The slurries that fume treatment agent is formed with alkaline industrial waste water, the weight ratio of the two are
1:9。
- red mud：Alumina producing discharge contains offscum in alkali.
- magnesia：Magnesite light burnt powder.
- sodium hydroxide：Technical grade.
- alkaline industrial waste water：From chemical plant, its pH is about 11.
- flyash：Acid flyash (AFA), main component：50wt%SiO2, 25wt%Al2O3, 9wt%CaO.
- slag charge：Clinker from steel mill, it is 400m to be ground to specific surface area2/kg。
- additive：Sodium dihydrogen phosphate.
- fiber：Wood pulp cellulose.
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.
Embodiment 1
Each component is well mixed by the formula according to table 1 obtains fume treatment agent, then adds alkaline waste water and flue gas is made
Desulfurization denitrification agent slurries, and deliver to desulfurizing tower.Flue gas (oxygen content 18vol%) enters desulfurization from the gas approach of desulfurizing tower
Tower, by ozone oxidation (ozone comes from ozone generator, and the ozone concentration of ozone generator is 10wt%) and flue gas desulfurization
After three layers of denitrfying agent slurries absorb spraying layer, sulfur dioxide and nitrogen oxides are fully absorbed by flue gas desulfurization and denitrification agent slurries.Cigarette
Desulfurization denitrfying agent slurries are introduced into desulfurizing tower after sulfur dioxide absorption and nitrogen oxides by Action of Gravity Field is located at bottom
Tower in slurries circulating slot.The serum recycle on slurries circulating slot top delivers to three layers of absorption spraying layer, the circulation of three in tower
Amount accounts for the 50vt% of output total amount.Discharged after the pH of the slurries of slurries circulating slot bottom in tower reaches 7.0, as desulphurization denitration
Accessory substance slurry.Flue gas is handled by demisting, is directly discharged from chimney.Flue gas desulfurization and denitrification operating mode is as shown in table 2 below and table 3.
The fume treatment agent prescription of table 1
The desulphurization denitration duty parameter of table 2
The desulphurization denitration emission behaviour of table 3
| Sequence number | Project | Quantity | Unit |
| 1 | Desulfurizing tower exiting flue gas amount (operating mode) | 824493 | m3/h |
| 2 | Exhaust gas temperature | 60 | ℃ |
| 3 | Sulfur dioxide emissioning concentration | 10 | mg/Nm3 |
| 4 | Discharged nitrous oxides concentration | 43 | mg/Nm3 |
| 5 | Desulfuration efficiency | 99 | Wt% |
| 6 | Denitration efficiency | 89.9 | Wt% |
| 7 | Export dust concentration | 11 | mg/Nm3 |
By gained desulphurization denitration accessory substance slurry (abbreviation accessory substance slurry) and magnesia, clinker, flyash, fiber and add
Add agent to stir 30min at 1600 rpm, obtain mixed material.Mixed material is entered into just base preparation system, starches and makes through excessively stream
The technical process such as base, vacuum dehydration, the shaping of shaping bucket, trimming and stacking prepare fiber cement board just base, are sent into curing kilns afterwards
In conserved, after maintenance the demoulding processing is dried in drying equipment.Dried fiber cement board enters through sanding apparatus
Row sanding is handled, and is put in storage after packing.Formula is referring to table 4.The performance test results are referring to table 5.
The fibre cement product formula of table 4
| Name of material | Accessory substance slurry | Fiber | Slag charge | Flyash | Additive | Magnesia |
| Specification (kg) | 100 | 15 | 10 | 10 | 7 | 24 |
The fibre cement product the performance test results of table 5
| Sequence number | Project | Unit | Test result |
| 1 | Density | kg/cm3 | 1.2 |
| 2 | Water absorption rate | % | 19.8 |
| 3 | Bulking factor | % | 0.41 |
| 4 | Impermeability | / | 24h reverse side have wet trace, no water droplet |
| 5 | Noninflammability | / | A levels |
| 6 | Rupture strength | MPa | 10.2 |
Embodiment 2
Using the fume treatment agent prescription of table 6, flue gas desulfurization and denitrification operating mode as shown in table 7 below and table 8.Remaining condition and reality
It is identical to apply example 1.Formula is referring to table 9.The performance test results are referring to table 10.
The fume treatment agent prescription of table 6
The desulphurization denitration duty parameter of table 7
| Sequence number | Project | Quantity | Unit |
| 1 | Desulfurizing tower inlet flue gas amount (operating mode) | 1037075 | m3/h |
| 2 | Standard state exhaust gas volumn | 701364 | Nm3/h |
| 3 | Desulfurizing tower inlet temperature | 140 | ℃ |
| 4 | Sulfur dioxide entrance concentration | 980 | mg/Nm3 |
| 5 | Nitrogen oxides entrance concentration | 410 | mg/Nm3 |
| 6 | Entrance flue dust | 100 | mg/Nm3 |
| 7 | Humidity of flue gas | 5.3 | Wt% |
The desulphurization denitration emission behaviour of table 8
| Sequence number | Project | Quantity | Unit |
| 1 | Desulfurizing tower exiting flue gas amount (operating mode) | 820493 | m3/h |
| 2 | Exhaust gas temperature | 58 | ℃ |
| 3 | Sulfur dioxide emissioning concentration | 19 | mg/Nm3 |
| 4 | Discharged nitrous oxides concentration | 45 | mg/Nm3 |
| 5 | Desulfuration efficiency | 98.8 | Wt% |
| 6 | Denitration efficiency | 89.7 | Wt% |
| 7 | Export dust concentration | 12 | mg/Nm3 |
The fibre cement product formula of table 9
| Name of material | Accessory substance slurry | Fiber | Slag charge | Flyash | Additive | Magnesia |
| Specification (kg) | 100 | 15 | 5 | 10 | 8 | 25 |
The fibre cement product the performance test results of table 10
| Sequence number | Project | Unit | Test result |
| 1 | Density | kg/cm3 | 1.27 |
| 2 | Water absorption rate | % | 23.8 |
| 3 | Bulking factor | % | 0.34 |
| 4 | Impermeability | / | 24h reverse side have wet trace, no water droplet |
| 5 | Noninflammability | / | A levels |
| 6 | Rupture strength | MPa | 15 |
Embodiment 3
Using the fume treatment agent prescription of table 11, flue gas desulfurization and denitrification operating mode as shown in table 12 below and table 13.Remaining condition
It is same as Example 1.Formula is referring to table 14.The performance test results are referring to table 15.
The fume treatment agent prescription of table 11
The desulphurization denitration duty parameter of table 12
| Sequence number | Project | Quantity | Unit |
| 1 | Desulfurizing tower inlet flue gas amount (operating mode) | 1092076 | m3/h |
| 2 | Standard state exhaust gas volumn | 741361 | Nm3/h |
| 3 | Desulfurizing tower inlet temperature | 143 | ℃ |
| 4 | Sulfur dioxide entrance concentration | 960 | mg/Nm3 |
| 5 | Nitrogen oxides entrance concentration | 392 | mg/Nm3 |
| 6 | Entrance flue dust | 113 | mg/Nm3 |
| 7 | Humidity of flue gas | 5.8 | Wt% |
The desulphurization denitration emission behaviour of table 13
| Sequence number | Project | Quantity | Unit |
| 1 | Desulfurizing tower exiting flue gas amount (operating mode) | 829453 | m3/h |
| 2 | Exhaust gas temperature | 57 | ℃ |
| 3 | Sulfur dioxide emissioning concentration | 24 | mg/Nm3 |
| 4 | Discharged nitrous oxides concentration | 35 | mg/Nm3 |
| 5 | Desulfuration efficiency | 98.5 | Wt% |
| 6 | Denitration efficiency | 89.6 | Wt% |
| 7 | Export dust concentration | 11 | mg/Nm3 |
The fibre cement product formula of table 14
| Name of material | Accessory substance slurry | Fiber | Slag charge | Flyash | Additive | Magnesia |
| Specification (kg) | 100 | 15 | 5 | 5 | 8 | 25 |
The fibre cement product the performance test results of table 15
| Sequence number | Project | Unit | Test result |
| 1 | Density | kg/cm3 | 1.40 |
| 2 | Water absorption rate | % | 29.5 |
| 3 | Bulking factor | % | 0.25 |
| 4 | Impermeability | / | 24h reverse side have wet trace, no water droplet |
| 5 | Noninflammability | / | A levels |
| 6 | Rupture strength | MPa | 17.5 |
The present invention is not limited to above-mentioned embodiment, in the case of without departing substantially from the substantive content of the present invention, this area skill
Any deformation, improvement, the replacement that art personnel are contemplated that each fall within the scope of the present invention.
Claims (10)
- A kind of 1. method of the flue gas desulfurization and denitrification manufacture fibre cement product based on red mud, it is characterised in that methods described bag Include following steps：(1) flue gas desulfurization and denitrification agent slurries, ozone and smoke contacts are made, wet method removes sulfur dioxide and nitrogen oxidation in flue gas Thing, so as to form desulphurization denitration accessory substance slurry；Wherein, the flue gas desulfurization and denitrification agent slurries are by fume treatment agent and industry The slurries that waste water is formed, the fume treatment agent include 50~100 parts by weight red muds, 5~30 parts by weight magnesia and 5~25 weights Measure part sodium hydroxide；(2) when the pH value of desulphurization denitration accessory substance slurry reaches 6.5~7.5, by the desulphurization denitration accessory substance slurry and oxidation Magnesium, Industrial Solid Waste, fiber and additive are mixed to form mixed material；Wherein, the desulphurization denitration accessory substance slurry, magnesia, The weight ratio of Industrial Solid Waste, fiber and additive is 100:15~35:10~25:5~20:5~15；(3) mixed material is prepared into just base, maintenance and drying, so as to obtain the fibre cement product.
- 2. according to the method for claim 1, it is characterised in that in step (1), the ozone is supplied by ozone generator, And ozone concentration caused by ozone generator is 1~15wt%.
- 3. according to the method for claim 1, it is characterised in that in step (1), the fume treatment agent includes 60~80 weights Measure part red mud, 15~25 parts by weight magnesia and 5~15 parts by weight of sodium hydroxide.
- 4. according to the method for claim 1, it is characterised in that in step (1), the sulfur dioxide in flue gas content exists 300~3000mg/Nm3Between, amount of nitrogen oxides is in 100~500mg/Nm3, and oxygen content is between 10~20vol%.
- 5. according to the method for claim 1, it is characterised in that in step (2), desulphurization denitration accessory substance slurry, magnesia, The weight ratio of Industrial Solid Waste, fiber and additive is 100:18~30:10~20:12~18:5~10.
- 6. according to the method for claim 1, it is characterised in that in step (1) and step (2), the magnesia is selected from water chestnut At least one of magnesium ore deposit light burnt powder, dolomite light burnt powder and analysis pure zirconia magnesium；And magnesite light burnt powder and dolomite are light-burned Content of magnesia in powder is respectively 65wt%~85wt%.
- 7. according to the method for claim 1, it is characterised in that in step (2), the Industrial Solid Waste be selected from clinker, slag, One or more in steel slag and iron slag and useless ash；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；The fiber is selected from wood pulp cellulose, glass At least one of fiber, polypropylene, polyacrylonitrile, lignin and hydroxypropyl methyl cellulose.
- 8. according to the method for claim 7, it is characterised in that in step (2), it is 1 that the Industrial Solid Waste, which is selected from weight ratio, ~2:1~2 clinker and flyash；The additive is dihydric phosphate；And the fiber is wood pulp cellulose.
- 9. according to the method for claim 1, it is characterised in that in step (2), the mixing comprises the following steps：Will be de- Sulphur denitration accessory substance slurry, magnesia, Industrial Solid Waste, fiber and additive stir 10 under 1200~2000r/min rotating speed ~60min, form the mixed material.
- 10. according to the method for claim 9, it is characterised in that the forming step is also included the fibre after drying process Tie up the step of cement products carries out sanding processing.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105817134A (en) * | 2015-01-07 | 2016-08-03 | 河北衡兴环保设备工程有限公司 | Chemical process wet-method desulphurization technology |
| CN105837153A (en) * | 2016-03-28 | 2016-08-10 | 北京中晶环境科技股份有限公司 | Sulfur magnesium oxychloride foam cement exterior wall insulation board and preparation method thereof. |
| 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817134A (en) * | 2015-01-07 | 2016-08-03 | 河北衡兴环保设备工程有限公司 | Chemical process wet-method desulphurization technology |
| 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 |
| CN105837153A (en) * | 2016-03-28 | 2016-08-10 | 北京中晶环境科技股份有限公司 | Sulfur magnesium oxychloride foam cement exterior wall insulation board and preparation method thereof. |
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