CN103449796B - A kind of sludge autoclaved brick and preparation method thereof - Google Patents
A kind of sludge autoclaved brick and preparation method thereof Download PDFInfo
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- CN103449796B CN103449796B CN201310282344.1A CN201310282344A CN103449796B CN 103449796 B CN103449796 B CN 103449796B CN 201310282344 A CN201310282344 A CN 201310282344A CN 103449796 B CN103449796 B CN 103449796B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a kind of sludge autoclaved bricks comprising the raw material components of following parts by weight：Sludge dewatering mud cake：20~60 parts, the first flyash：11~25 parts, carbide slag or the first lime：0~10 part, clinker：22~39 parts, reinforcing agent：1~6 part.Wherein, the sludge dewatering mud cake includes the raw material components of following parts by weight：Sludge：33~66 parts, the second flyash：15~33 parts, the second lime：15~33 parts, coagulant：1~5 part.The steam-pressing brisk is using industrial waste as primary raw material, low energy consumption, non-sintered, safety and sanitation and steady in a long-term.The invention also discloses a kind of sludge autoclaved brick preparation methods, this method using first improve be dehydrated afterwards to form sludge dewatering mud cake by the way of control moisture percentage in sewage sludge, and flyash is added etc. and carries out hydration reaction, standard brick performance requirement, and its simple production process, low energy consumption, environmental protection can be met by the steam-pressing brisk of party's legal system.
Description
Technical field
The invention belongs to recycling sludges to utilize technical field, more particularly to a kind of sludge autoclaved brick and preparation method thereof.
Background technology
Sludge becomes a kind of distinguishing with liquid and solid-state castoff because of the slurry feature of its liquid-solid phase mixture
Waste.It not only has the feature of slurry object when generating, but also its liquid, solid admixture have certain stability, usually
Only applying great applied external force（Physics, chemistry）Shi Caineng solid and liquid separations.Moisture percentage in sewage sludge is high simultaneously, is not easy to be dehydrated,
Hydroaropic substance containing jelly structure, and high organic content, it is perishable smelly, contain various pathogenic bacteria.If a large amount of
Untreated sludge is piled up arbitrarily and discharges, and new pollution can be not only caused to environment, but also can waste having in sludge
Use resource.Therefore, how by yield big, complicated component sludge, its minimizing, innoxious, stable is made after scientific disposal
Change and recycling, have become the hot issue of China or even whole world extensive concern.
The disposition of China's sludge at present mainly with it is agricultural, burn and landfill based on, but since the moisture content of sludge is high, power
Property is poor, pollutant load is high, and often in the presence of polluting, environment, processing cost is excessively high or easily causes landfill for these processing modes
The problems such as field engineering project disaster, it is difficult to which the disposition requirement for meeting the various sludge largely generated is especially difficult to solve municipal sludge
Problem.Municipal sludge is the product after municipal sewage treatment, is a kind of dirty by organic debris, microorganism, inorganic particle, colloid
The extremely complex heterogeneous body of the compositions such as mud.Sludge is mainly characterized by moisture content height, and high organic content is easy corruption hair
It is smelly, and contain a variety of poisonous and harmful substances such as heavy metal, pathogen.With the quickening of Urbanization in China, Environmental
The increase of control investment dynamics, treatment rate of domestic sewage improve year by year, and the yield of sludge also constantly increases.Sewage treatment plant it is general
And the quality of water environment that will improve China with the raising one side of sewage disposal degree is promoted, it uplifts the people's living standard, but same
When be easy to cause sludge again due to that cannot deal carefully with, the difficult situation of secondary pollution is caused directly to water body and air.
In view of insufficient and problem and the active demand of Treatment of Sludge instantly, the disposition of sludge existing for above-mentioned method of disposal
It receives more and more attention, the research that building materials are prepared using sludge is come into being.Compared with landfill, utilization is more thorough for it；With
Burning is compared, and small, high efficiency is invested；It is safer compared with compost is agricultural.Therefore, the production of recycling sludge, especially sludge is built
Build has boundless foreground with brick.But because of high organic content in sludge, moisture content is high, so how to improve object
The uniformity of the dispersion of material eliminates the adverse effect of organic matter in sludge to brick intensity using rational dispensing and process program,
And it improves the endurance qualities such as the freeze thawing resistance of sludge brick, anti-carbonation, organic matter thermal decomposition caused by heat drying how to be avoided to generate
Foul smell, the problems such as how effectively being killed organic matter, active somatic cell, the pathogenic microorganism in sludge by effective technique be all
The key point of sludge brick exploitation.
Instantly, for above-mentioned brickmaking problem, sludge baked brick is developed, realizing turns waste into wealth.But existing sintering
Brick materials are not easy, production technology is complicated and high energy consumption, will produce pernicious gas in production process, big to the potential pollution of air,
Country of China wall, which is corrected, have been required to be forbidden to use clay brick, while stringent limitation fired brick item in all cities in the whole nation in 2010
Mesh.Furthermore existing sintering brick process is poor to the dehydrating effect of sludge cake, and moisture content is still higher after dehydration, and at least 80%,
In this way during the mixture of brickmaking technology, sludge cake is easy agglomerating, causes the intensity " weak spot " in adobe, then be equipped with
Other traditional raw materials, the sludge brick performance being finally made is poor, is not widely deployed for materials for wall, municipal works, bank protection
The fields such as brick.
Invention content
It is an object of the invention to overcome the above-mentioned deficiency of the prior art, provide a kind of using industrial waste as primary raw material
Low energy consumption, non-sintered, safety and sanitation and sludge autoclaved brick steady in a long-term.
It is a further object of the present invention to provide a kind of sludge autoclaved brick preparation method, this method simple production process, sludge
Cake dehydration efficiency height and low energy consumption, environmental protection.
In order to achieve the above-mentioned object of the invention, technical scheme is as follows：
A kind of sludge autoclaved brick comprising the raw material components of following parts by weight：
Sludge dewatering mud cake：20~60 parts
First flyash：11~25 parts
Carbide slag or the first lime：0~10 part
Clinker：22~39 parts
Reinforcing agent：1~6 part；
Wherein, the sludge dewatering mud cake includes the raw material components of following parts by weight：
Sludge：33~66 parts
Second flyash：15~33 parts
Second lime：15~33 parts
Coagulant：1~5 part.
And a kind of sludge autoclaved brick preparation method, this method include following preparation process：
The preparation of sludge dewatering mud cake：Each component is weighed according to above-mentioned sludge dewatering mud cake formula, each component that will be weighed
Batch mixing conditioning is carried out, conditioning sludge is formed；The conditioning sludge is dehydrated；
The each component of steam-pressing brisk mixes：Each component is weighed according to above-mentioned steam-pressing brisk formula；Control wet basis moisture content be 15%~
20%, each component weighed is subjected to mixing treatment, obtains mixed material；
By the mixed material compression moulding, mould brick is obtained；
Steam press maintenance is carried out after the mould brick is stood 4~48h.
Above-mentioned sludge autoclaved brick is turned waste into wealth using industrial waste as primary raw material, and the treatment of wastes with processes of wastes against one another protects clay resource,
And mixed with other components by the suitable sludge dewatering mud cake of moisture content so that each component is uniformly mixed, and it is " thin to avoid intensity
Weakness ".Wherein, lime or carbide slag etc. are mixed with sludge dewatering mud cake, aquation can be carried out with excitation reinforcement agent, flyash etc.
Reaction, greatly improves the hydration reaction efficiency in steam-pressing brisk, forms more mullite, afwillite etc. so that steams
Press brick intensity higher, functional and steady in a long-term, furthermore, lime is mixed with sludge dewatering mud cake, because of the addition meeting of lime
Heat release is effectively killed active somatic cell, pathogenic microorganism etc. in sludge, is played so the bioactivity of sludge can be reduced simultaneously
It sterilizes, the effect of sterilization and deodorization, realize the innoxious of Treatment of Sludge, minimizing and the sludge autoclaved brick is made to meet mark
The performance requirement of quasi- brick can obtain wide popularization and application under low cost operation.Above-mentioned sludge dewatering mud cake includes sludge, powder
Coal ash, lime, coagulant etc. mutually mix flyash, lime, coagulant etc. with sludge, in order to carry out sludge conditioning, shape
At the sludge dewatering mud cake using flyash as framework construction body so that sludge is in being dehydrated link, even if making in high-pressure filteration
Still the filtration channel of water can be kept not block with hard skeleton structure under, realize deep dehydration, ensure that sludge dewatering
Mud cake dehydration efficiency is high, dehydrating effect is good, can at least be down to 60%, and only by weathering, moisture content can be further
30% is reduced to hereinafter, avoiding the foul smell that high energy consumption and the organic matter thermal decomposition in heat drying generate.Such sludge dewatering
Mud cake is mixed with the other components of steam-pressing brisk, can reach above-mentioned good mixed effect.Moreover, the stone being added in sludge conditioning
Ash also can heat release deodorization and sterilization, and provide help for the brick durability of post-production, while providing alkaline environment, assist improvement
Dewatering performance of sludge.
Above-mentioned sludge autoclaved brick preparation method obtains the technical thought that dehydrated sludge cake is used again using first conditioning dehydration,
The minimizing of sludge is effectively realized, transport and processing cost are reduced, with the decrement means phase such as traditional natural desiccation, heat drying
Than time and energy consumption being greatly saved, and effectively prevent the generation of foul smell.Simultaneously using the steam curing of high temperature and pressure, by force
Change hydration reaction, and play disinfection, sterilization, deodorization, effectively kills active somatic cell, the pathogenic microorganism etc. in sludge, protect
Card steam-pressing brisk obtained is environmentally friendly.Furthermore this method is main former with industrial wastes such as sludge, flyash, clinker, carbide slags
Material only adds minute quantity cement, you can qualified sludge autoclaved brick is made.Entire simple production process environmental protection, raw material are easy to get, at
This is cheap, realizes the combination of sludge treatment and recycling.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing：
Fig. 1 is the XRD spectrum that municipal sludge provided in an embodiment of the present invention dries sample；
Fig. 2 is another XRD spectrum that municipal sludge provided in an embodiment of the present invention dries sample；
Fig. 3 is the a-SEM collection of illustrative plates of municipal sludge steam-pressing brisk provided in an embodiment of the present invention；
Fig. 4 is the b-SEM collection of illustrative plates of municipal sludge steam-pressing brisk provided in an embodiment of the present invention；
Fig. 5 is the c-SEM collection of illustrative plates of municipal sludge steam-pressing brisk provided in an embodiment of the present invention；
Fig. 6 is the d-SEM collection of illustrative plates of municipal sludge steam-pressing brisk provided in an embodiment of the present invention；
Fig. 7 is the sludge autoclaved process for producing bricks flow chart that various embodiments of the present invention provide.
Specific implementation mode
In order to make technical problems, technical solutions and advantageous effects to be solved by the present invention be more clearly understood, below in conjunction with
Embodiment and attached drawing, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
The embodiment of the present invention provides a kind of sludge autoclaved brick comprising the raw material components of following parts by weight：
Sludge dewatering mud cake：20~60 parts
First flyash：11~25 parts
Carbide slag or the first lime：0~10 part
Clinker：22~39 parts
Reinforcing agent：1~6 part；
Wherein, the sludge dewatering mud cake includes the raw material components of following parts by weight：
Sludge：33~66 parts
Second flyash：15~33 parts
Second lime：15~33 parts
Coagulant：1~5 part.
Wherein, above-mentioned first flyash and the second flyash can be that same source is collected, and can also pick up from different zones respectively,
As long as the flyash of this field routine, specifically, flyash be from the flue gas after coal combustion catching get off it is thin
Ash is the primary solids waste of coal-burning power plant's discharge.The main oxides group of power plants flyash becomes：SiO2、Al2O3、
FeO、Fe2O3、CaO、TiO2Deng.Above-mentioned first lime and the second lime do not differentiate between specific compositional difference, as long as this field is normal
Rule with calcium oxide lime as main component, wherein lime includes quick lime and white lime, can be used in this.
In a preferred embodiment, the effective CaO content of above-mentioned first lime and the second lime is all higher than 50% and less than or equal to 100%,
The addition of other useless materials can be not only reduced in this way, but also can meet the performance requirement of steam-pressing brisk.
Specifically, above-mentioned sludge dewatering mud cake includes sludge, flyash, lime and coagulant, can also include other not
With the above-mentioned conflicting ingredient of sludge dewatering mud cake each component, such as rubble, clinker.The sludge is various lives, industry etc.
Sludge, such as domestic sewage sludge, industrial wastewater sludge, copper water-supply pipe, wherein municipal sludge is most intractable dirt instantly
Mud, because it is a kind of extremely complex heterogeneous body including organic debris, microorganism, inorganic particle, colloid sludge etc.,
Moisture content is high, high organic content, and easy corruption is smelly, and contains a variety of poisonous and harmful substances such as heavy metal, pathogen, tradition
Method for sludge treatment dehydrating effect it is poor, it is higher for moisture content（Such as 99% or more）Sludge, it is general best be only dehydrated to
Moisture content 80% or so, it is easy to be agglomerating in brickmaking mixing procedure, the intensity " weak spot " in adobe is caused after sludge is agglomerating,
And content of organics is excessively high leads to that brick hardness is insufficient, organic matter thermal decomposition generates foul smell, be easy to cause secondary dirt
Dye so that making brick from sludge especially municipal sludge brickmaking is significantly limited.And the above-mentioned formula of the present invention has well solved municipal administration
The problem of Treatment of Sludge hardly possible, it is 95%-99.5% that can handle moisture content, and content of organics is the sludge of 30%-60%, for other
The process problem of sludge is also just readily solved certainly.
In above-mentioned sludge dewatering mud cake, the flyash, lime and coagulant can improve sludge, specific to improve
It is as follows：The flyash can form hard skeleton structure in sludge dewatering mud cake, to keep the filtration channel of water not block up
Plug realizes deep dehydration.The lime is basic anhydride, and skeleton body can have both been built for flyash and provides advantageous alkaline ring
Border, and can coordinating with the coagulant realizes with the adsorption bridging of mud granule or electrically neutralizes, keep mud granule de- steady and
Cohesion, can be sterilized with heat release, and reduction organic matter decomposes smelly etc..Mud cake dehydration rate is significantly improved in this way, makes containing for mud cake
Water rate be down to 60% hereinafter, and can effective sterilizing, environmentally-friendly sanitary.In a preferred embodiment, the coagulant is iron chloride, chlorine
Change aluminium, ferric sulfate, aluminum sulfate, aluminium polychloride, poly-ferric chloride, polyaluminium sulfate, bodied ferric sulfate and polymeric aluminum sulfate iron
At least one of, it can effectively improve cohesion and the water separation capability of sludge.Wherein, the higher the better for the purity of the coagulant,
Preferably greater than 92% coagulant, to reduce the addition of other nonessential substances, but purity is higher, and cost is higher, general to select
The coagulant for taking purity to be 92% is more suitable.In addition, the flyash and lime can fill in sludge conditioning, dehydration
Work as conditioner, improve the dewatering of sludge, and strength materials and solidification sludge can be formed in steam-pressing brisk manufacturing process, improves
The intensity and performance of product, embody the integrated technique that sludge dewatering is combined with recycling.And by improving,
The shape of sludge cake after deep dehydration is changed, and sludge cake is made to be not easy into subsequent brickmaking mixing procedure
Group, and is more easy to be uniformly mixed with other raw materials, avoid sludge it is agglomerating afterwards caused by intensity " weak spot ".In conclusion above-mentioned
Sludge dewatering mud cake can have lower moisture content, and can form higher integral strength.
Above-mentioned sludge autoclaved brick includes sludge dewatering mud cake, flyash, carbide slag or lime, clinker and reinforcing agent, they
Between there are hydration reaction, can be formed stablize, the hydrated product of high intensity, realize the stabilization and intensity requirement of brick.Preferred
In embodiment, the steam-pressing brisk further includes at least one of rubble, gangue, oyster shell whiting and gypsum, to be carried out to steam-pressing brisk
Fine tuning meets its hardness and other actual performance demands, obtains performance more preferably brick, wherein oyster shell whiting and gypsum can also
It participates in that hydration reaction occurs.Though above-mentioned steam-pressing brisk is multi-component complex mixture, element contained by each component can difference,
General main matter proportion difference is little so that the performance of steam-pressing brisk is uniform.In a preferred embodiment, whole calcium silicon ratio
It keeps in a certain range, being equipped with this steam-pressing brisk formula system, the ratio of calcium content and silicone content is 1.5~2.5, can be into one
Step preferably 1.5~2.1, concretely 1.8,2.0,2.1 etc., can be actively engaged in hydration reaction, meet brickmaking well
Performance requirement reaches preferable brick changing firmness requirements, and realizes the steady in a long-term of brick.
In above-mentioned steam-pressing brisk recipe ingredient, the sludge dewatering mud cake is above-mentioned sludge dewatering mud cake.The flyash
Chemical property is more stable, can occur to form hydrated product similar to the gelling reaction of volcanic ash under the conditions of alkaline excitation,
The hydrated product property being consequently formed also can be more stable.The carbide slag or lime can provide the alkali needed for the flyash
Property condition, and further heat release degerming.In a preferred embodiment, the moisture content of the carbide slag<35%, 100% >=effective CaO contains
Amount>45%, the addition of other useless materials can be not only reduced in this way and influences brick performance, but also can be with other components mixedly more
Add uniformly, is conducive to subsequent hydration reaction and fully carries out.
Above-mentioned reinforcing agent can enhance hydration reaction, enhance product performance, and in a preferred embodiment, the reinforcing agent is water
At least one of mud, polyvinyl alcohol and lignosulfonates, with can making the hydration reaction progress between each substance abundant,
Thoroughly.The clinker can further improve the hardness of steam-pressing brisk, intensity.
To further increase the batch mixing uniformity, each component of steam-pressing brisk formula can be mixed after broken screening,
In, the carbide slag or lime preferable particle size is 0.5mm hereinafter, the clinker preferable particle size is 1cm hereinafter, the sludge dewatering
The broken grain size of mud cake can be determined according to practical mixing situation.
Above-mentioned steam-pressing brisk is by flyash, lime, clinker isoreactivity substance and reinforcing agent, then coordinates the mixed of high uniformity
Expect effect, forms the cementitious materials hydrated products such as de- vigorous mullite, entringite, hydrated calcium silicate（It can be scanned by SEM---
Electron microscope observation arrives, and is made up of its image of XRD---X x ray diffraction analysis xs）, significantly improve the entirety of sludge brick
Intensity, the endurance qualities such as freeze thawing resistance, anti-carbonation to improve sludge brick, and it is micro- to realize organic matter, active somatic cell, cause of disease
The effective stabilisation and immobilization of biology etc..
Sludge dewatering mud cake in above-mentioned sludge autoclaved brick is made by being dehydrated after conditioning, and moisture content is relatively low, and can be with steaming
It presses the other components of brick to be uniformly mixed, avoids strength weak point, and be conducive to subsequent hydration reaction.In reinforcing agent, fine coal
Under the effects that grey, have occurred than more thoroughly, complete hydration reaction, form with hydrated products such as mullite, water and calcium silicates
Based on brick system, it is good and steadily in the long term to impart the high steam-pressing brisk intensity, resistance to compression and High anti bending strength, frost resistance
Performance, and plus the heat release bactericidal effect of the substances such as lime so that steam-pressing brisk not only meets the requirement of standard brick, such as radiates
The many indexs such as property, drying shrinkage and carbonation coefficient reach relevant criterion, and environmentally-friendly sanitary, do not cause secondary pollution.
And correspondingly, the embodiment of the present invention additionally provides a kind of sludge autoclaved brick preparation method, and this method includes following
Preparation process：
S01：The preparation of sludge dewatering mud cake：A, each component is weighed according to above-mentioned sludge dewatering mud cake formula；B, it will weigh
Each component carry out batch mixing conditioning, formed conditioning sludge；C, the conditioning sludge is dehydrated；
S02：The each component of steam-pressing brisk mixes：D, each component is weighed according to above-mentioned steam-pressing brisk formula；E, control wet basis is aqueous
Rate is 15%~20%, and each component weighed is carried out mixing treatment, obtains mixed material；
S03：By the mixed material compression moulding, mould brick is obtained；
S04：Steam press maintenance is carried out after the mould brick is stood 4~48h.
Specifically, in the b step by step of above-mentioned steps S01, as long as each component is uniformly mixed.In preferred embodiment
In, the coagulant, lime, flyash are sequentially added in sludge, control mixing speed is 50rpm, after stirring 1-3 minutes,
Rotating speed is gradually increased to 200-300rpm, and maintains this rotating speed 15s-18s, then again with 15-20 points of the speed of 50rpm stirring
Clock.
In the c step by step of above-mentioned steps S01, existing dehydration technique can be utilized to handle, preferably mechanical dehydration, such as sheet frame
Filter-press dehydration.The moisture content of dehydrated sludge cake be down to 60% hereinafter, gravity-flow ventilation at most after two weeks, the moisture content of sludge cake can
It is down to 20%-30%, you can be used for brickmaking.
In the e step by step of above-mentioned steps S02, it is 15%~20% that need to control wet basis moisture content, i.e. the weight of water accounts for the steaming
The 15%~20% of brick all components gross weight is pressed, ability batch mixing in this way is uniform, ensures effective brickmaking.Because of excess moisture, then sludge
Each component be easy it is agglomerating, compacting be difficult to be molded；Hypohydration, and each material component cannot be made to be sufficiently mixed.
In above-mentioned steps S03, briquetting pressure is preferably 10~35Mpa, has both been avoided that the hydrated product of steam-pressing brisk met in this way
It is damaged, also can guarantee that steam-pressing brisk molding is preferable.
In above-mentioned steps S04, using the steam curing of high temperature and pressure, strengthen hydration reaction, at the same play disinfection, sterilization,
Active somatic cell, pathogenic microorganism etc. in sludge have effectively been killed in the effect of deodorization.Compared to traditional sintering process, energy
Consumption is smaller and not will produce pernicious gas.In a preferred embodiment, the steam pressure of the steam press maintenance is 0.1~2.3MPa,
Vapor (steam) temperature is 100 DEG C~220 DEG C, and curing time is 4~15h, ensure that effective progress of hydration reaction.
Above-mentioned sludge autoclaved brick prepares simple production process, obtains what dehydrated sludge cake was used again using first conditioning dehydration
Technical thought effectively realizes the minimizing of sludge, reduces transport and processing cost, along with steam press maintenance acts on, into one
Step enhances hydration reaction, enhances the performance of sludge brick.Thus the average reachable 17.89MPa of manufactured steam-pressing brisk compression strength,
Flexural strength is average up to 4.71MPa, and brick compression strength is average up to 16.9MPa after freezing-thawing test, and dry mass loss is
0.2%-1.1%, and strength grade is other, frost resistance meets GB11945-1999《Autoclaved lime-sand brick》Middle MU15C high-class products are wanted
It asks；Its carbonation coefficient is 0.88, drying shrinkage value 0.55mm/m；Radionuclide meets GB6566-2010《Construction material is put
Penetrating property radionuclides limitation》Middle construction main body material requirement.
Now by taking specific sludge autoclaved brick and preparation method thereof as an example, the present invention will be described in further detail.Wherein,
The sludge is municipal sludge, derives from sewage treatment plant, and specially Wuhan City Dragon King mouth sewage treatment plant's primary sedimentation tank and two sinks
The moisture content of the mixing sludge of pond discharge, the sludge is 95%-99.5%, content of organics 30%-60%.It is each by each embodiment
80 parts of steam-pressing brisks are made, each brick performance index is then measured respectively, learns the average behavior index of brick according to this, judge such
The performance characteristics of steam-pressing brisk.
Embodiment 1
A kind of sludge autoclaved brick, includes the recipe ingredient of following parts by weight：40 parts of municipal sludge dehydrated sludge cake, flyash
18 parts, 4 parts of carbide slag, 32 parts of clinker, 6 parts of reinforcing agent.Wherein municipal sludge dehydrated sludge cake includes that following raw material mixing improves simultaneously
Dehydration is made：33 parts of municipal sludge, 33 parts of flyash, 33 parts of lime, 1 part of coagulant.
The preparation method of above-mentioned steam-pressing brisk includes the following steps, referring specifically to Fig. 7, the lime component in figure replaces with this reality
Apply the carbide slag component of example：
T01：The preparation of sludge dewatering mud cake：A1, each component is weighed according to the sludge dewatering mud cake formula of embodiment 1；b1、
The each component weighed is uniformly mixed, conditioning sludge is formed；C1, the conditioning sludge is dehydrated, it is de- obtains municipal sludge
The mud cake is stood 3 days by pat of cement, and moisture content is down to 25%.
T02：The each component of steam-pressing brisk mixes：D1, each component is weighed according to the steam-pressing brisk formula of embodiment 1；E1, control are wet
Base moisture content is 15%, and each component weighed is carried out mixing treatment, obtains mixed material；
T03：By the mixed material compression moulding, mould brick is obtained；
T04：Steam press maintenance is carried out after the mould brick is stood 12h.
Wherein, the steam pressure of briquetting pressure 20MPa, steam press maintenance are 0.8MPa, and vapor (steam) temperature is 180 DEG C, maintenance
Time is 8h.80 parts of steam-pressing brisk inspections test obtained, obtains：Mean compressive strength is 17.89Mpa, and average flexural strength is
4.71Mpa, mean compressive strength is 16.9Mpa after freezing-thawing test, and dry mass loss is 0.2%-1.1%, and frost resistance meets
GB11945-1999《Autoclaved lime-sand brick》The requirement of middle MU15C high-class products, and carbonation coefficient is 0.88, drying shrinkage value is
0.55mm/m；Radionuclide meets GB6566-2010《Radioactive material radionuclides limitation》Middle construction main body material requirement.
Embodiment 2
A kind of sludge autoclaved brick, includes the recipe ingredient of following parts by weight：60 parts of municipal sludge dehydrated sludge cake, flyash
12 parts, 22 parts of clinker, 6 parts of reinforcing agent.Wherein municipal sludge dehydrated sludge cake includes that following raw material mixing is improved and is dehydrated obtained：City
66 parts of political affairs sludge, 33 parts of flyash, 33 parts of lime, 5 parts of coagulant.
The preparation method of above-mentioned steam-pressing brisk includes the following steps, referring specifically to Fig. 7, the lime component in figure is not added：
T05：The preparation of sludge dewatering mud cake：A2, each component is weighed according to the sludge dewatering mud cake formula of embodiment 2；b2、
With the b1 steps of embodiment 1；C2, the conditioning sludge is dehydrated, obtains municipal sludge dehydrated sludge cake, which is stood
2 days, moisture content was down to 30%.
T06：The each component of steam-pressing brisk mixes：D2, each component is weighed according to the steam-pressing brisk formula of embodiment 2；E2, control are wet
Base moisture content is 20%, and each component weighed is carried out mixing treatment, obtains mixed material；
T07：By the mixed material compression moulding, mould brick is obtained；
T08：Steam press maintenance is carried out after the mould brick is stood 48h.
Wherein, the steam pressure of briquetting pressure 10MPa, steam press maintenance are 2.3MPa, and vapor (steam) temperature is 220 DEG C, maintenance
Time is 15h.80 parts of steam-pressing brisk inspections test obtained, obtains：Mean compressive strength is 17.85Mpa, and average flexural strength is
4.71Mpa, mean compressive strength is 16.52Mpa after freezing-thawing test, and dry mass loss is 0.2%-1.1%, and frost resistance meets
GB11945-1999《Autoclaved lime-sand brick》The requirement of middle MU15C high-class products, and carbonation coefficient is 0.88, drying shrinkage value is
0.55mm/m；Radionuclide meets GB6566-2010《Radioactive material radionuclides limitation》Middle construction main body material requirement.
Embodiment 3
A kind of sludge autoclaved brick, includes the recipe ingredient of following parts by weight：20 parts of municipal sludge dehydrated sludge cake, flyash
25 parts, 10 parts of lime, 22 parts of clinker, 1 part of reinforcing agent.Wherein municipal sludge dehydrated sludge cake includes that following raw material mixing is improved and taken off
Water is made：33 parts of municipal sludge, 15 parts of flyash, 33 parts of lime, 5 parts of coagulant.
The preparation method of above-mentioned steam-pressing brisk includes the following steps, referring specifically to Fig. 7：
T09：The preparation of sludge dewatering mud cake：A3, each component is weighed according to the sludge dewatering mud cake formula of embodiment 3；b3、
With the b1 steps of embodiment 1；C3, the conditioning sludge is dehydrated, obtains municipal sludge dehydrated sludge cake, which is stood
3 days, moisture content was down to 30%.
T10：The each component of steam-pressing brisk mixes：D3, each component is weighed according to the steam-pressing brisk formula of embodiment 3；E3, control are wet
Base moisture content is 20%, and each component weighed is carried out mixing treatment, obtains mixed material；
T11：By the mixed material compression moulding, mould brick is obtained；
T12：Steam press maintenance is carried out after the mould brick is stood 4h.
Wherein, the steam pressure of briquetting pressure 35MPa, steam press maintenance are 0.1MPa, and vapor (steam) temperature is 100 DEG C, maintenance
Time is 15h.80 parts of steam-pressing brisk inspections test obtained, obtains：Mean compressive strength is 17.85Mpa, and average flexural strength is
4.69Mpa, mean compressive strength is 16.6Mpa after freezing-thawing test, and dry mass loss is 0.2%-1.1%, and frost resistance meets
GB11945-1999《Autoclaved lime-sand brick》The requirement of middle MU15C high-class products, and carbonation coefficient is 0.88, drying shrinkage value is
0.55mm/m；Radionuclide meets GB6566-2010《Radioactive material radionuclides limitation》Middle construction main body material requirement.
Embodiment 4
A kind of sludge autoclaved brick, includes the recipe ingredient of following parts by weight：40 parts of municipal sludge dehydrated sludge cake, flyash
11 parts, 8 parts of lime, 39 parts of clinker, 6 parts of reinforcing agent.Wherein municipal sludge dehydrated sludge cake includes that following raw material mixing is improved and taken off
Water is made：50 parts of municipal sludge, 33 parts of flyash, 15 parts of lime, 5 parts of coagulant.
The preparation method of above-mentioned steam-pressing brisk includes the following steps, referring specifically to Fig. 7：
T13：The preparation of sludge dewatering mud cake：A4, each component is weighed according to the sludge dewatering mud cake formula of embodiment 4；b4、
With the b1 steps of embodiment 1；C4, the conditioning sludge is dehydrated, obtains municipal sludge dehydrated sludge cake, which is stood
10 days, moisture content was down to 20%.
T14：The each component of steam-pressing brisk mixes：D4, each component is weighed according to the steam-pressing brisk formula of embodiment 3；E4, control are wet
Base moisture content is 18%, and each component weighed is carried out mixing treatment, obtains mixed material；
T15：By the mixed material compression moulding, mould brick is obtained；
T16：Steam press maintenance is carried out after the mould brick is stood 48h.
Wherein, the steam pressure of briquetting pressure 25MPa, steam press maintenance are 1.2MPa, and vapor (steam) temperature is 140 DEG C, maintenance
Time is 10h.80 parts of steam-pressing brisk inspections test obtained, obtains：Mean compressive strength is 17.79Mpa, and average flexural strength is
4.68Mpa, mean compressive strength is 16.5Mpa after freezing-thawing test, and dry mass loss is 0.2%-1.1%, and frost resistance meets
GB11945-1999《Autoclaved lime-sand brick》The requirement of middle MU15C high-class products, and carbonation coefficient is 0.88, drying shrinkage value is
0.55mm/m；Radionuclide meets GB6566-2010《Radioactive material radionuclides limitation》Middle construction main body material requirement.
SEM is carried out to 320 samples in total of above-mentioned 4 embodiments, i.e. scanning electron microscope is observed, and by XRD,
I.e. its image of X-ray diffraction analysis forms.Test result is shown：The essential mineral group of each part steam-pressing brisk is divided into quartz and mica,
And contain a large amount of calcium aluminosilicate hydrate, mullite and calcium silicate hydrate gel, and mullite and calcium silicate hydrate gel are steam pressures
The main source of brick intensity.
The SEM and XRD spectrum for now taking a copy of it steam-pressing brisk are specifically addressed, and for details, reference can be made to Fig. 1 and Fig. 2 two
Four SEM spectrums of XRD spectrum and Fig. 3-Fig. 6（Including tetra- collection of illustrative plates of a, b, c, d）.
By Fig. 1, it can be seen that, the essential mineral group of steam-pressing brisk is divided into quartz（Quartz）And mica（Mica）.It can by Fig. 2
To see, calcium aluminosilicate hydrate is contained in steam-pressing brisk（Katoite Silication）And mullite（Mullite）.Schemed by a-SEM
Find that the calcium aluminosilicate hydrate of graininess and pomegranate seed shape, structure are comparatively dense in spectrum；It is observed in b-SEM and d-SEM collection of illustrative plates
A large amount of curly afwillite（CSH）Gel and acicular mullite, and observe lamellar in c-SEM collection of illustrative plates
Calcium hydroxide.In conclusion steam-pressing brisk is functional, suitable for materials for wall, the road side necks such as brick and revetment brick of municipal works
Domain.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (7)
1. a kind of sludge autoclaved brick, which is characterized in that include the raw material components of following parts by weight：
Sludge dewatering mud cake：20 ~ 60 parts
First flyash：11 ~ 25 parts
Carbide slag or the first lime：0 ~ 10 part
Clinker：22 ~ 39 parts
Reinforcing agent：1 ~ 6 part；
Wherein, the sludge dewatering mud cake includes the raw material components of following parts by weight：
Sludge：33 ~ 66 parts
Second flyash：15 ~ 33 parts
Second lime：15 ~ 33 parts
Coagulant：1 ~ 5 part；
In the raw material components：Moisture content in the carbide slag<35%, 100% ＞ effective CaO contents>45%；First stone
Effective CaO content in ash and the second lime is all higher than 50% and is less than 100%；The carbide slag, first lime and second
The grain size of lime is 0.5mm hereinafter, the grain size of the clinker is 1cm or less；
In the steam-pressing brisk：The ratio of calcium content and silicone content is 1.5 ~ 2.5.
2. sludge autoclaved brick as described in claim 1, which is characterized in that the reinforcing agent is cement, polyvinyl alcohol and wooden
At least one of plain sulfonate.
3. sludge autoclaved brick as described in claim 1, which is characterized in that the coagulant is iron chloride, aluminium chloride, sulfuric acid
At least one in iron, aluminum sulfate, aluminium polychloride, poly-ferric chloride, polyaluminium sulfate, bodied ferric sulfate and polymeric aluminum sulfate iron
Kind.
4. sludge autoclaved brick as described in claim 1, which is characterized in that the steam-pressing brisk further includes rubble, gangue, shell
At least one of powder and gypsum.
5. a kind of sludge autoclaved brick preparation method, which is characterized in that including following preparation process：
The preparation of sludge dewatering mud cake：Each component is weighed according to sludge dewatering mud cake formula described in claim 1, it is each by what is weighed
Component carries out batch mixing conditioning, forms conditioning sludge；The conditioning sludge is dehydrated；
The each component of steam-pressing brisk mixes：Each component is weighed according to steam-pressing brisk formula described in claim 1；Control wet basis moisture content
It is 15% ~ 20%, each component weighed is subjected to mixing treatment, obtains mixed material；
By the mixed material compression moulding, mould brick is obtained；
Steam press maintenance is carried out after the mould brick is stood 4 ~ 48h.
6. sludge autoclaved brick preparation method as claimed in claim 5, which is characterized in that in the steam press maintenance step, steam
Pressure is 0.1 ~ 2.3MPa, and vapor (steam) temperature is 100oC ~ 220oC, and curing time is 4 ~ 15h.
7. such as sludge autoclaved brick preparation method described in claim 5 or 6, which is characterized in that in the compression moulding step, at
Type pressure is 10 ~ 35MPa.
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103979924A (en) * | 2014-05-20 | 2014-08-13 | 潜山县新型工程建筑材料有限公司 | Process for producing autoclaved brick |
| CN105130352A (en) * | 2015-07-08 | 2015-12-09 | 安徽省溜口新型建筑材料有限公司 | Various-minerals compounded autoclaved brick |
| CN105859232A (en) * | 2016-04-12 | 2016-08-17 | 东南大学 | Autoclaved sand-lime brick produced from industrial sludge, and production method thereof |
| CN106186746A (en) * | 2016-06-30 | 2016-12-07 | 浙江新业管桩有限公司 | A kind of method utilizing printing and dyeing sludge to prepare clinker |
| CN110066145A (en) * | 2019-04-19 | 2019-07-30 | 铜陵铜冠建安新型环保建材科技有限公司 | A kind of preparation method neutralizing slag brick block |
| CN109912289A (en) * | 2019-04-25 | 2019-06-21 | 谭林立 | A kind of industrialized preparing process and system of sludge autoclaved brick |
| CN110255998A (en) * | 2019-05-16 | 2019-09-20 | 光大环保技术研究院（深圳）有限公司 | Utilize the method for clinker and flying dust brickmaking |
| CN112624680A (en) * | 2021-02-05 | 2021-04-09 | 绿润环境科技(宁波)有限公司 | Baking-free static pressure slag soil brick and preparation method thereof |
| CN113149607B (en) * | 2021-04-14 | 2022-09-09 | 天津城建大学 | Sludge brick and preparation method thereof |
| CN113860831A (en) * | 2021-06-08 | 2021-12-31 | 山西大学 | Environment-friendly sludge baking-free brick prepared from municipal sludge and multi-component coal-based solid waste and preparation method thereof |
| CN113929368A (en) * | 2021-10-29 | 2022-01-14 | 江苏德昶环保科技有限公司 | Preparation method of light board |
| CN114538873A (en) * | 2022-01-26 | 2022-05-27 | 河南三林建设集团有限公司 | Process method for preparing autoclaved brick by utilizing sludge |
| CN114804735B (en) * | 2022-04-27 | 2022-11-04 | 扬州市建筑设计研究院有限公司 | Process for producing biological carbon soil cured brick by using waste |
| CN114873895A (en) * | 2022-05-18 | 2022-08-09 | 上海申耀环保工程有限公司 | Water works mud sediment decrement and resourceful treatment system |
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