CN103449796A - Sludge autoclaved brick and preparation method thereof - Google Patents
Sludge autoclaved brick and preparation method thereof Download PDFInfo
- Publication number
- CN103449796A CN103449796A CN2013102823441A CN201310282344A CN103449796A CN 103449796 A CN103449796 A CN 103449796A CN 2013102823441 A CN2013102823441 A CN 2013102823441A CN 201310282344 A CN201310282344 A CN 201310282344A CN 103449796 A CN103449796 A CN 103449796A
- Authority
- CN
- China
- Prior art keywords
- sludge
- brick
- autoclaved brick
- parts
- mud
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a sludge autoclaved brick. The sludge autoclaved brick comprises the following raw material components in parts by weight: 20-60 parts of sludge dehydrated mud cakes, 11-25 parts of first fly ash, 0-10 parts of carbide slag or first lime, 22-39 parts of furnace slag and 1-6 parts of a reinforcing agent, wherein the sludge dehydrated mud cakes comprise the following raw material components in parts by weight: 33-66 parts of sludge, 15-33 parts of second fly ash, 15-33 parts of second lime and 1-5 parts of a coagulating agent. The autoclaved brick is prepared from industrial wastes as main raw materials, and is low in energy consumption, non-sintered, safe, healthy and stable for a long time. The invention also discloses a preparation method of the sludge autoclaved brick. According to the preparation method, the sludge water content is controlled in a mode of conditioning at first and then dehydrating to form the sludge dehydrated mud cakes, and the fly ash and the like are added to perform hydration reaction. The autoclaved brick prepared by the method can meet performance requirements of a standard brick, and the production process is simple, low in energy consumption and environment-friendly.
Description
Technical field
The invention belongs to recycling sludge and utilize technical field, particularly a kind of sludge autoclaved brick and preparation method thereof.
Background technology
Mud becomes all distinguishing wastes of a class and liquid state and solid-state castoff because of the slurry state feature of its liquid-solid phase mixture.It not only has the feature of slurry state thing when producing, and its liquid, solid admixture has certain stability, usually only could the solid, liquid separation when applying great applied external force (physics, chemistry).Moisture percentage in sewage sludge is high simultaneously, is difficult for dehydration, contain the hydroaropic substance that is gel-like texture, and organic content is high, perishable smelly, contains various pathogenic bacterium.If a large amount of undressed mud is stacked arbitrarily and discharge, not only can cause new pollution to environment, but also can waste the useful resources in mud.Therefore, the mud of output is large, complicated component how makes its minimizing, innoxious, stabilization and resource utilization after science is processed, and has become the hot issue of China and even whole world extensive concern.
That the at present disposal of China's mud mainly be take is agricultural, burning and landfill be as main, but because the water ratio of mud is high, mechanical property is poor, pollutant load is high, often there is contaminate environment in these processing modes, processing cost is too high or easily cause the problems such as landfill yard engineering project disaster, be difficult to meet the disposal requirement of a large amount of various mud that produce, especially be difficult to solve the municipal sludge problem.Municipal sludge is the product after municipal sewage treatment, is a kind of extremely complicated heterogeneous body be comprised of organic relic, bacterium thalline, inorganic particle, colloid mud etc.The principal character of mud is that water ratio is high, and organic content is high, easily degenerates smellyly, and contains the multiple hazardous and noxious substances such as heavy metal, pathogenic bacteria.Along with the quickening of Urbanization in China, the increase of country to the environmental investment dynamics, treatment rate of domestic sewage improves year by year, and the output of mud also constantly increases.The raising of the penetration and promotion of sewage work and sewage disposal degree will improve the quality of water environment of China on the one hand, uplift the people's living standard, but easily cause again mud to deal carefully with owing to can not get simultaneously, cause the difficult situation of secondary pollution directly to water body and atmosphere.
In view of deficiency and problem and the active demand of sludge treatment instantly that above-mentioned method of disposal exists, the disposal of mud receives increasing concern, and the research that utilizes mud to prepare building materials is arisen at the historic moment.It is compared with landfill, utilizes more thorough; With burning, compare, invest little, high efficiency; With compost is agricultural, compare, safer.Therefore, recycling sludge, particularly mud production building brick has boundless prospect.But, because in mud, organic content is high, water ratio is high, so how to improve the homogeneity of the dispersion of material, adopt reasonably batching and process program to eliminate the disadvantageous effect of organism to brick intensity in mud, and improve the endurance qualities such as the freeze-thaw-of sludge brick, anti-carbonization, foul smell that organism thermolysis how to avoid heat drying to cause produces, how by effective technique, the organism in mud, active somatic cell, pathogenic micro-organism effectively to be killed etc. to problem be all the key point that sludge brick is developed.
Instantly, for above-mentioned brickmaking problem, develop sludge baked brick, realized turning waste into wealth.That but existing vitrified brick is drawn materials is difficult, complex manufacturing and energy consumption high, can produce obnoxious flavour in production process, potentially contaminated to atmosphere is large, and China country wall is corrected and required national all cities in 2010 to ban use of clay brick, simultaneously strict restriction vitrified brick project.Moreover, existing sintering brick process is poor to the dehydrating effect of sludge cake, after dehydration, water ratio is still higher, at least 80%, in the process that is mixed of brickmaking technology, sludge cake is easily agglomerating like this, cause the intensity " thin spot " in adobe, be equipped with other traditional raw material, the sludge brick poor-performing of finally making, can not be widely used in the fields such as materials for wall, public works, revetment brick again.
Summary of the invention
The object of the invention is to overcome the above-mentioned deficiency of prior art, a kind of the take less energy-consumption that industrial waste is main raw material, non-sintering, safety and sanitation and sludge autoclaved brick steady in a long-term are provided.
Another object of the present invention is to provide a kind of sludge autoclaved brick preparation method, and the method production technique is simple, the sludge cake dewatering efficiency is high and less energy-consumption, environmental protection.
In order to realize the foregoing invention purpose, technical scheme of the present invention is as follows:
A kind of sludge autoclaved brick, it comprises the feed composition 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
Slag: 22～39 parts
Toughener: 1～6 part;
Wherein, described sludge dewatering mud cake comprises the feed composition of following parts by weight:
Mud: 33～66 parts
The second flyash: 15～33 parts
The second lime: 15～33 parts
Coagulating agent: 1～5 part.
And, a kind of sludge autoclaved brick preparation method, the method comprises following preparation process:
The preparation of sludge dewatering mud cake: take each component according to above-mentioned sludge dewatering mud cake formula, each component taken is carried out to the batch mixing conditioning, form conditioning mud; Described conditioning mud is dewatered;
Each component of autoclaved brick is mixed: according to above-mentioned autoclaved brick formula, take each component; Controlling the wet basis water ratio is 15%～20%, and each component taken is carried out to mixing treatment, obtains mixture;
By described mixture compression moulding, obtain mould brick;
To after the standing 4～48h of described mould brick, carry out steam press maintenance.
Above-mentioned sludge autoclaved brick be take industrial waste as main raw material, turns waste into wealth, and the treatment of wastes with processes of wastes against one another, protected clay resource, and mixes with other components by the suitable sludge dewatering mud cake of water ratio, makes each component mix, and has avoided intensity " thin spot ".Wherein, lime or carbide slag etc. is mixed with the sludge dewatering mud cake, can excitation reinforcement agent, flyash etc. carry out hydration reaction, greatly improved the hydration reaction efficiency in autoclaved brick, form more mullite, calcium silicate hydrate etc., make autoclaved brick intensity higher, functional and steady in a long-term, moreover, lime is mixed with the sludge dewatering mud cake, interpolation meeting heat release because of lime, so can reduce the biological activity of mud simultaneously, effectively kill the active somatic cell in mud, pathogenic micro-organism etc., play sterilization, the effect of sterilization and deodorizing, realized the innoxious of sludge treatment, minimizing also makes described sludge autoclaved brick meet the performance requirement of standard square, can under low cost operation, obtain wide popularization and application.Above-mentioned sludge dewatering mud cake comprises mud, flyash, lime, coagulating agent etc., by flyash, lime, coagulating agent etc. are mixed mutually with mud, purpose is in order to carry out sludge conditioning, the sludge dewatering mud cake of flyash as the framework construction body usingd in formation, make mud in the dehydration link, even still can be with hard skeleton structure under the high-pressure filteration effect, keep the filtration channel of water not stop up, realize deep dehydration, guaranteed that sludge dewatering mud cake dewatering efficiency is high, dehydrating effect is good, can at least be down to 60%, and only pass through weathering, water ratio can further be reduced to below 30%, the foul smell of having avoided high energy consumption in the heat drying and organism thermolysis to produce.Such sludge dewatering mud cake mixes with other components of autoclaved brick, can reach above-mentioned good mixing effect.And the lime added also can the heat release deodorization and sterilization, and offers help for the fragment of brick weather resistance of post-production, and alkaline environment is provided simultaneously, assist to improve dewatering performance of sludge in sludge conditioning.
Above-mentioned sludge autoclaved brick preparation method adopts first conditioning dehydration to obtain the technical thought that dehydrated sludge cake is used again, effectively realized the minimizing of mud, transportation and processing cost have been reduced, with decrement means such as traditional natural mummification, heat dryings, compare, greatly save time and energy consumption, and effectively avoided the generation of foul smell.Use the vapor cure of High Temperature High Pressure, the strengthening hydration reaction, and play sterilization, sterilization, deodorization simultaneously, effectively kills active somatic cell in mud, pathogenic micro-organism etc., guarantees that the autoclaved brick made is environmentally friendly.Moreover it is main raw material that the method be take the industrial wastes such as mud, flyash, slag, carbide slag, only adds minute quantity cement, can make qualified sludge autoclaved brick.The simple environmental protection of whole production technique, raw material is easy to get, with low cost, has realized the combination of sludge disposal and resource utilization.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
The municipal sludge that Fig. 1 provides for the embodiment of the present invention is dried an XRD figure spectrum of sample;
The municipal sludge that Fig. 2 provides for the embodiment of the present invention is dried another XRD figure spectrum of sample;
The a-SEM collection of illustrative plates of the municipal sludge autoclaved brick that Fig. 3 provides for the embodiment of the present invention;
The b-SEM collection of illustrative plates of the municipal sludge autoclaved brick that Fig. 4 provides for the embodiment of the present invention;
The c-SEM collection of illustrative plates of the municipal sludge autoclaved brick that Fig. 5 provides for the embodiment of the present invention;
The d-SEM collection of illustrative plates of the municipal sludge autoclaved brick that Fig. 6 provides for the embodiment of the present invention;
The sludge autoclaved process for producing bricks schema that Fig. 7 provides for various embodiments of the present invention.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearer, below in conjunction with embodiment and accompanying drawing, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the present invention provides a kind of sludge autoclaved brick, and it comprises the feed composition 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
Slag: 22～39 parts
Toughener: 1～6 part;
Wherein, described sludge dewatering mud cake comprises the feed composition of following parts by weight:
Mud: 33～66 parts
The second flyash: 15～33 parts
The second lime: 15～33 parts
Coagulating agent: 1～5 part.
Wherein, above-mentioned the first flyash and the second flyash can be same source and collect, and also can pick up from respectively different zones, so long as the flyash of this area routine gets final product, particularly, flyash is to receive the thin ash of catching in the flue gas from coal combustion, is the main solid waste that coal-burning power plant discharges.The main oxides of power plants flyash consists of: SiO
2, Al
2o
3, FeO, Fe
2o
3, CaO, TiO
2deng.Above-mentioned the first lime and the second lime are not distinguished concrete component difference, so long as the lime that calcium oxide is main component of take of this area routine gets final product, wherein, lime comprises unslaked lime and white lime, all can be used in this.In a preferred embodiment, the effective CaO content of above-mentioned the first lime and the second lime all is greater than 50% and be less than or equal to 100%, so both can reduce adding of other useless materials, can meet again the performance requirement of autoclaved brick.
Particularly, above-mentioned sludge dewatering mud cake comprises mud, flyash, lime and coagulating agent, can also comprise other not with the afoul composition of above-mentioned each component of sludge dewatering mud cake, as rubble, slag etc.Described mud is various lives, the mud such as industry, as sanitary sewage mud, industrial wastewater sludge, to sewage sludge etc., wherein, municipal sludge is the most unmanageable mud instantly, because it is a kind of organic relic that comprises, the bacterium thalline, inorganic particle, the extremely complicated heterogeneous body of colloid mud etc., water ratio is high, organic content is high, easily corruption is smelly, and contain heavy metal, the multiple hazardous and noxious substances such as pathogenic bacteria, traditional method for sludge treatment dehydrating effect is poor, for the water ratio mud of higher (as more than 99%), general the best is dewatered only to water ratio 80% left and right, easily agglomerating in the brickmaking mixing procedure, cause the intensity " thin spot " in adobe after mud is agglomerating, and the too high fragment of brick hardness deficiency that causes of organic content, the organism thermolysis produces the problems such as foul smell, easily cause secondary pollution, especially municipal sludge brickmaking is greatly limited to make making brick from sludge.Process difficult problem and above-mentioned formula of the present invention has solved municipal sludge well, can process water ratio is 95%-99.5%, and the mud that organic content is 30%-60% also just is readily solved certainly for the processing problem of other mud.
In above-mentioned sludge dewatering mud cake, described flyash, lime and coagulating agent can be nursed one's health mud, concrete conditioning is as follows: described flyash can form hard skeleton structure in the sludge dewatering mud cake, with the filtration channel that keeps water, does not stop up, and realizes deep dehydration.Described lime is basic oxide, both can provide favourable alkaline environment for flyash builds skeleton body, can coordinate with described coagulating agent again, realize and the adsorption bridging of mud granule or electrically neutralization, make the de-steady and cohesion of mud granule, all right heat release sterilizing, the minimizing organic substance decomposing is smelly etc.Significantly improved like this mud cake dehydration rate, the water ratio of mud cake is down to below 60%, and the energy effective sterilizing, environmentally-friendly sanitary.In a preferred embodiment, described coagulating agent is at least one in iron(ic) chloride, aluminum chloride, ferric sulfate, Tai-Ace S 150, polymerize aluminum chloride, poly-ferric chloride, polyaluminium sulfate, bodied ferric sulfate and PAFS, can effectively improve cohesion and the water separation capability of mud.Wherein, the purity of described coagulating agent is more high better, is preferably greater than 92% coagulating agent, and to reduce the add-on of other nonessential materials, but purity is higher, and cost is higher, and the coagulating agent that generally to choose purity be 92% is more suitable.In addition, described flyash and lime can serve as amendment in sludge conditioning, dehydration, improve the dewatering of mud, can in autoclaved brick making processes, form intensity material solidification sludge again, improve intensity and the performance of product, embodied the integrated technique that sludge dewatering combines with recycling.And change has occurred through the shape of conditioning, sludge cake after deep dehydration, sludge cake is difficult in follow-up brickmaking mixing procedure agglomerating, and more easily mixes with other raw materials, the intensity " thin spot " caused after having avoided mud agglomerating.In sum, above-mentioned sludge dewatering mud cake can have lower water ratio, can form higher bulk strength again.
Above-mentioned sludge autoclaved brick comprises sludge dewatering mud cake, flyash, carbide slag or lime, slag and toughener, has hydration reaction between them, can form stable, high-intensity hydrated product, realizes the stable and requirement of strength of fragment of brick.In a preferred embodiment, described autoclaved brick also comprises at least one in rubble, coal gangue, oyster shell whiting and gypsum, so that autoclaved brick is finely tuned, meet its hardness and other actual performance demands, obtain the better fragment of brick of performance, wherein, oyster shell whiting and gypsum also can participate in occurring hydration reaction.Though above-mentioned autoclaved brick is the multi-component complex mixture, the contained element of its each component is difference to some extent, and general essential substance proportion difference is little, makes the performance homogeneous of autoclaved brick.In a preferred embodiment, whole calcium silicon ratio remains in certain scope, be equipped with this autoclaved brick formula system, the ratio of calcium contents and silicone content is 1.5～2.5, can be more preferably 1.5～2.1, specifically can be 1.8,2.0,2.1 etc., can effectively participate in hydration reaction, meet well the brickmaking performance requirement, reach fragment of brick hardness demand preferably, and realize the long-term stability of fragment of brick.
In above-mentioned autoclaved brick recipe ingredient, described sludge dewatering mud cake is above-mentioned sludge dewatering mud cake.Described flyash chemical property is more stable, can be similar to pozzuolanic gelling reaction and form hydrated product under the alkaline excitation condition, and the hydrated product character formed thus also can be more stable.Described carbide slag or lime can provide described flyash required alkaline condition, and further heat release degerming.In a preferred embodiment, the water ratio of described carbide slag<35%, 100% >=effective CaO content > 45%, so both can reduce adding of other useless materials and affect the fragment of brick performance, again can be mixedly more even with other components, be conducive to follow-up hydration reaction and fully carry out.
Above-mentioned toughener can strengthen hydration reaction, enhances product performance, and in a preferred embodiment, described toughener is at least one in cement, polyvinyl alcohol and sulfonated lignin, can be so that the hydration reaction between each material carries out ground fully, thoroughly.Described slag can further improve hardness, the intensity of autoclaved brick.
For further improving the batch mixing uniformity coefficient, each component of autoclaved brick formula can be mixed after the fragmentation screening, wherein, described carbide slag or lime preferable particle size are below 0.5mm, described slag preferable particle size is below 1cm, and the broken particle diameter of described sludge dewatering mud cake can be determined according to actual mixing situation.
Above-mentioned autoclaved brick is by flyash, lime, slag isoreactivity material and toughener, the compounding effect that coordinates again high uniformity, having formed the gelling material hydrated products such as de-vigorous mullite, ettringite, hydrated calcium silicate (can arrive by the SEM---sem observation, and form by its image of XRD---X x ray diffraction analysis x), significantly improved the bulk strength of sludge brick, thereby improved the endurance qualities such as the freeze-thaw-of sludge brick, anti-carbonization, and realized effective stabilization and the immobilization of organism, active somatic cell, pathogenic micro-organism etc.
Sludge dewatering mud cake in above-mentioned sludge autoclaved brick obtains by nursing one's health rear Dehydration, and water ratio is lower, can mix with other components of autoclaved brick again, has avoided the strength weak point, and has been conducive to follow-up hydration reaction.Under the effects such as toughener, flyash, occurred more thoroughly, hydration reaction completely, formed and take the fragment of brick system that the hydrated products such as mullite, water and Calucium Silicate powder are main body, given that described autoclaved brick intensity is high, resistance to compression and High anti bending strength, performance that frost resistance is good and steady in a long-term, add again the heat release germicidal action of the materials such as lime, make autoclaved brick not only meet the service requirements of standard square, as the many indexs such as radioactivity, drying shrinkage and carbonation coefficient all reach relevant criterion, environmentally-friendly sanitary, do not cause secondary pollution again.
And correspondingly, the embodiment of the present invention also provides a kind of sludge autoclaved brick preparation method, the method comprises following preparation process:
S01: the preparation of sludge dewatering mud cake: a, according to above-mentioned sludge dewatering mud cake formula, take each component; B, each component that will take are carried out the batch mixing conditioning, form conditioning mud; C, described conditioning mud is dewatered;
S02: each component of autoclaved brick is mixed: d, according to above-mentioned autoclaved brick formula, take each component; E, control wet basis water ratio are 15%～20%, and each component taken is carried out to mixing treatment, obtain mixture;
S03: by described mixture compression moulding, obtain mould brick;
S04: will after the standing 4～48h of described mould brick, carry out steam press maintenance.
Particularly, in the b step by step of above-mentioned steps S01, as long as each component is mixed.In a preferred embodiment, add successively described coagulating agent, lime, flyash in mud, the control stirring velocity is 50rpm, stir after 1-3 minute, improve gradually rotating speed to 200-300rpm, and maintain this rotating speed 15s-18s, then stir and get final product in 15-20 minute with the speed of 50rpm again.
In the c step by step of above-mentioned steps S01, can utilize existing dehydration technique to process, the preferred mechanical dehydration, as the filter press dehydration.The water ratio of dehydrated sludge cake is down to below 60%, and natural ventilation is at the most after two weeks, and the water ratio of sludge cake can be down to 20%-30%, can be used for brickmaking.
In the e step by step of above-mentioned steps S02, needing to control the wet basis water ratio is 15%～20%, and the weight of water accounts for 15%～20% of described autoclaved brick all components gross weight, and the ability batch mixing is even like this, guarantees effective brickmaking.Because excess moisture, each component of mud is easily agglomerating, and compacting is difficult to moulding; Hypohydration, can not make again each material component fully mix.
In above-mentioned steps S03, forming pressure is preferably 10～35Mpa, can avoid like this hydrated product of autoclaved brick to suffer damage, and also can guarantee that the autoclaved brick moulding is better.
In above-mentioned steps S04, adopt the vapor cure of High Temperature High Pressure, the strengthening hydration reaction plays the effect of sterilization, sterilization, deodorizing simultaneously, has effectively killed the active somatic cell in mud, pathogenic micro-organism etc.Than traditional sintering process, energy consumption is less and can not produce obnoxious flavour.In a preferred embodiment, the vapor pressure of described steam press maintenance is 0.1～2.3MPa, and vapor temperature is 100 ℃～220 ℃, and curing time is 4～15h, has guaranteed effectively carrying out of hydration reaction.
It is simple that above-mentioned sludge autoclaved brick prepares production technique, adopt first conditioning dehydration to obtain the technical thought that dehydrated sludge cake is used again, effectively realized the minimizing of mud, transportation and processing cost have been reduced, add the steam press maintenance effect, further strengthen hydration reaction, strengthened the performance of sludge brick.The autoclaved brick ultimate compression strength of making thus on average can reach 17.89MPa, folding strength on average can reach 4.71MPa, after freezing and thawing test, fragment of brick ultimate compression strength on average can reach 16.9MPa, the dry mass loss is 0.2%-1.1%, and the requirement that strength grade is other, frost resistance all meets MU15C premium grads in GB11945-1999 " autoclaved lime-sand brick "; Its carbonation coefficient is 0.88, and drying shrinkage value is 0.55mm/m; Radionuclide meets construction main body material requirement in GB6566-2010 " the radioactive material nucleic is limited the quantity of ".
Now take concrete sludge autoclaved brick and preparation method thereof as example, the present invention is further elaborated.Wherein, described mud is municipal sludge, derives from sewage work, is specially the mixing sludge that Wuhan City's Dragon King's mouth sewage work preliminary sedimentation tank and second pond are discharged, and the water ratio of described mud is 95%-99.5%, and organic content is 30%-60%.Respectively make 80 parts of autoclaved bricks by each embodiment, then measure respectively each fragment of brick performance index, learn according to this average behaviour index of fragment of brick, judge the characteristic of property of such autoclaved brick.
Embodiment 1
A kind of sludge autoclaved brick, comprise the recipe ingredient of following parts by weight: 40 parts of municipal sludge dehydrated sludge cakes, 18 parts, flyash, 4 parts of carbide slags, 32 parts, slag, 6 parts of tougheners.Wherein the municipal sludge dehydrated sludge cake comprises that following raw material mixes conditioning and Dehydration obtains: 33 parts of municipal sludges, 33 parts, flyash, 33 parts, lime, 1 part, coagulating agent.
The preparation method of above-mentioned autoclaved brick comprises the following steps, and specifically referring to Fig. 7, the lime component in figure replaces with the carbide slag component of the present embodiment:
T01: the preparation of sludge dewatering mud cake: a1, according to the sludge dewatering mud cake formula of embodiment 1, take each component; B1, each component that will take mix, and form conditioning mud; C1, described conditioning mud is dewatered, obtain the municipal sludge dehydrated sludge cake, by standing 3 days of this mud cake, water ratio was down to 25%.
T02: each component of autoclaved brick is mixed: d1, according to the autoclaved brick formula of embodiment 1, take each component; E1, control wet basis water ratio are 15%, and each component taken is carried out to mixing treatment, obtain mixture;
T03: by described mixture compression moulding, obtain mould brick;
T04: will after the standing 12h of described mould brick, carry out steam press maintenance.
Wherein, forming pressure is 20MPa, and the vapor pressure of steam press maintenance is 0.8MPa, and vapor temperature is 180 ℃, and curing time is 8h.80 parts of autoclaved brick censorship tests that make, draw: mean compressive strength is 17.89Mpa, average folding strength is 4.71Mpa, after freezing and thawing test, mean compressive strength is 16.9Mpa, the dry mass loss is 0.2%-1.1%, frost resistance meets the requirement of MU15C premium grads in GB11945-1999 " autoclaved lime-sand brick ", and carbonation coefficient is 0.88, and drying shrinkage value is 0.55mm/m; Radionuclide meets construction main body material requirement in GB6566-2010 " the radioactive material nucleic is limited the quantity of ".
Embodiment 2
A kind of sludge autoclaved brick, comprise the recipe ingredient of following parts by weight: 60 parts of municipal sludge dehydrated sludge cakes, 12 parts, flyash, 22 parts, slag, 6 parts of tougheners.Wherein the municipal sludge dehydrated sludge cake comprises that following raw material mixes conditioning and Dehydration obtains: 66 parts of municipal sludges, 33 parts, flyash, 33 parts, lime, 5 parts, coagulating agent.
The preparation method of above-mentioned autoclaved brick comprises the following steps, and specifically referring to Fig. 7, the lime component in figure is not added:
T05: the preparation of sludge dewatering mud cake: a2, according to the sludge dewatering mud cake formula of embodiment 2, take each component; B2, with the b1 step of embodiment 1; C2, described conditioning mud is dewatered, obtain the municipal sludge dehydrated sludge cake, by standing 2 days of this mud cake, water ratio was down to 30%.
T06: each component of autoclaved brick is mixed: d2, according to the autoclaved brick formula of embodiment 2, take each component; E2, control wet basis water ratio are 20%, and each component taken is carried out to mixing treatment, obtain mixture;
T07: by described mixture compression moulding, obtain mould brick;
T08: will after the standing 48h of described mould brick, carry out steam press maintenance.
Wherein, forming pressure is 10MPa, and the vapor pressure of steam press maintenance is 2.3MPa, and vapor temperature is 220 ℃, and curing time is 15h.80 parts of autoclaved brick censorship tests that make, draw: mean compressive strength is 17.85Mpa, average folding strength is 4.71Mpa, after freezing and thawing test, mean compressive strength is 16.52Mpa, the dry mass loss is 0.2%-1.1%, frost resistance meets the requirement of MU15C premium grads in GB11945-1999 " autoclaved lime-sand brick ", and carbonation coefficient is 0.88, and drying shrinkage value is 0.55mm/m; Radionuclide meets construction main body material requirement in GB6566-2010 " the radioactive material nucleic is limited the quantity of ".
Embodiment 3
A kind of sludge autoclaved brick, comprise the recipe ingredient of following parts by weight: 20 parts of municipal sludge dehydrated sludge cakes, 25 parts, flyash, 10 parts, lime, 22 parts, slag, 1 part of toughener.Wherein the municipal sludge dehydrated sludge cake comprises that following raw material mixes conditioning and Dehydration obtains: 33 parts of municipal sludges, 15 parts, flyash, 33 parts, lime, 5 parts, coagulating agent.
The preparation method of above-mentioned autoclaved brick comprises the following steps, specifically referring to Fig. 7:
T09: the preparation of sludge dewatering mud cake: a3, according to the sludge dewatering mud cake formula of embodiment 3, take each component; B3, with the b1 step of embodiment 1; C3, described conditioning mud is dewatered, obtain the municipal sludge dehydrated sludge cake, by standing 3 days of this mud cake, water ratio was down to 30%.
T10: each component of autoclaved brick is mixed: d3, according to the autoclaved brick formula of embodiment 3, take each component; E3, control wet basis water ratio are 20%, and each component taken is carried out to mixing treatment, obtain mixture;
T11: by described mixture compression moulding, obtain mould brick;
T12: will after the standing 4h of described mould brick, carry out steam press maintenance.
Wherein, forming pressure is 35MPa, and the vapor pressure of steam press maintenance is 0.1MPa, and vapor temperature is 100 ℃, and curing time is 15h.80 parts of autoclaved brick censorship tests that make, draw: mean compressive strength is 17.85Mpa, average folding strength is 4.69Mpa, after freezing and thawing test, mean compressive strength is 16.6Mpa, the dry mass loss is 0.2%-1.1%, frost resistance meets the requirement of MU15C premium grads in GB11945-1999 " autoclaved lime-sand brick ", and carbonation coefficient is 0.88, and drying shrinkage value is 0.55mm/m; Radionuclide meets construction main body material requirement in GB6566-2010 " the radioactive material nucleic is limited the quantity of ".
Embodiment 4
A kind of sludge autoclaved brick, comprise the recipe ingredient of following parts by weight: 40 parts of municipal sludge dehydrated sludge cakes, 11 parts, flyash, 8 parts, lime, 39 parts, slag, 6 parts of tougheners.Wherein the municipal sludge dehydrated sludge cake comprises that following raw material mixes conditioning and Dehydration obtains: 50 parts of municipal sludges, 33 parts, flyash, 15 parts, lime, 5 parts, coagulating agent.
The preparation method of above-mentioned autoclaved brick comprises the following steps, specifically referring to Fig. 7:
T13: the preparation of sludge dewatering mud cake: a4, according to the sludge dewatering mud cake formula of embodiment 4, take each component; B4, with the b1 step of embodiment 1; C4, described conditioning mud is dewatered, obtain the municipal sludge dehydrated sludge cake, by standing 10 days of this mud cake, water ratio was down to 20%.
T14: each component of autoclaved brick is mixed: d4, according to the autoclaved brick formula of embodiment 3, take each component; E4, control wet basis water ratio are 18%, and each component taken is carried out to mixing treatment, obtain mixture;
T15: by described mixture compression moulding, obtain mould brick;
T16: will after the standing 48h of described mould brick, carry out steam press maintenance.
Wherein, forming pressure is 25MPa, and the vapor pressure of steam press maintenance is 1.2MPa, and vapor temperature is 140 ℃, and curing time is 10h.80 parts of autoclaved brick censorship tests that make, draw: mean compressive strength is 17.79Mpa, average folding strength is 4.68Mpa, after freezing and thawing test, mean compressive strength is 16.5Mpa, the dry mass loss is 0.2%-1.1%, frost resistance meets the requirement of MU15C premium grads in GB11945-1999 " autoclaved lime-sand brick ", and carbonation coefficient is 0.88, and drying shrinkage value is 0.55mm/m; Radionuclide meets construction main body material requirement in GB6566-2010 " the radioactive material nucleic is limited the quantity of ".
320 samples altogether to above-mentioned 4 embodiment carry out SEM, i.e. sem observation, and, by XRD, its image of X-ray diffraction analysis forms.Test result shows: the essential mineral component of each part of autoclaved brick is quartz and mica, and contains a large amount of calcium aluminosilicate hydrates, mullite and calcium silicate hydrate gel, and mullite and calcium silicate hydrate gel are the main sources of autoclaved brick intensity.
SEM and the XRD figure spectrum of now getting a copy of it autoclaved brick are specifically addressed, specifically can be referring to Fig. 1 and two XRD figure spectrums of Fig. 2 and tetra-SEM collection of illustrative plates of Fig. 3-Fig. 6 (comprising a, b, c, tetra-collection of illustrative plates of d).
By Fig. 1, can be seen, the essential mineral component of autoclaved brick is quartzy (Quartz) and mica (Mica).Can be seen by Fig. 2, contain calcium aluminosilicate hydrate (Katoite Silication) and mullite (Mullite) in autoclaved brick.Find the calcium aluminosilicate hydrate of particulate state and Semen Granati shape in the a-SEM collection of illustrative plates, structure is comparatively fine and close; Observe calcium silicate hydrate (CSH) gel of a large amount of curling shapes and the mullite of needle-like in b-SEM and d-SEM collection of illustrative plates, and observe the calcium hydroxide of lamellar in the c-SEM collection of illustrative plates.In sum, autoclaved brick functional, be suitable for the fields such as the other brick in road of materials for wall, public works and revetment brick.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a sludge autoclaved brick, is characterized in that, comprises the feed composition of following parts by weight:
Wherein, described sludge dewatering mud cake comprises the feed composition of following parts by weight:
2. sludge autoclaved brick as claimed in claim 1, is characterized in that, water ratio in described carbide slag<35%, 100% >=effective CaO content > 45%.
3. sludge autoclaved brick as claimed in claim 1, is characterized in that, the effective CaO content in described the first lime and the second lime all is greater than 50% and be less than or equal to 100%.
4. sludge autoclaved brick as described as the claims 1 to 3 any one, is characterized in that, described toughener is at least one in cement, polyvinyl alcohol and sulfonated lignin.
5. sludge autoclaved brick as described as the claims 1 to 3 any one, it is characterized in that, described coagulating agent is at least one in iron(ic) chloride, aluminum chloride, ferric sulfate, Tai-Ace S 150, polymerize aluminum chloride, poly-ferric chloride, polyaluminium sulfate, bodied ferric sulfate and PAFS.
6. sludge autoclaved brick as claimed in claim 1, is characterized in that, described autoclaved brick also comprises at least one in rubble, coal gangue, oyster shell whiting and gypsum.
7. as claims 1 to 3, the described sludge autoclaved brick of 6 any one, it is characterized in that, in described autoclaved brick: the ratio of calcium contents and silicone content is 1.5～2.5.
8. a sludge autoclaved brick preparation method, is characterized in that, comprises following preparation process:
The preparation of sludge dewatering mud cake: take each component according to the described sludge dewatering mud cake of claim 1 formula, each component taken is carried out to the batch mixing conditioning, form conditioning mud; Described conditioning mud is dewatered;
Each component of autoclaved brick is mixed: according to autoclaved brick formula claimed in claim 1, take each component; Controlling the wet basis water ratio is 15%～20%, and each component taken is carried out to mixing treatment, obtains mixture;
By described mixture compression moulding, obtain mould brick;
To after the standing 4～48h of described mould brick, carry out steam press maintenance.
9. sludge autoclaved brick preparation method as claimed in claim 8, is characterized in that, in described steam press maintenance step, vapor pressure is 0.1～2.3MPa, and vapor temperature is 100 ℃～220 ℃, and curing time is 4～15h.
10. sludge autoclaved brick preparation method as claimed in claim 8 or 9, is characterized in that, in described compression moulding step, forming pressure is 10～35MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310282344.1A CN103449796B (en) | 2013-07-05 | 2013-07-05 | A kind of sludge autoclaved brick and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310282344.1A CN103449796B (en) | 2013-07-05 | 2013-07-05 | A kind of sludge autoclaved brick and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103449796A true CN103449796A (en) | 2013-12-18 |
| CN103449796B CN103449796B (en) | 2018-10-16 |
Family
ID=49732693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310282344.1A Active CN103449796B (en) | 2013-07-05 | 2013-07-05 | A kind of sludge autoclaved brick and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103449796B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109912289A (en) * | 2019-04-25 | 2019-06-21 | 谭林立 | A kind of industrialized preparing process and system of sludge autoclaved brick |
| 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 |
| 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 |
| CN113149607A (en) * | 2021-04-14 | 2021-07-23 | 天津城建大学 | Sludge brick heavy metal curing agent, sludge brick and preparation method of sludge brick |
| 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 |
| CN114804735A (en) * | 2022-04-27 | 2022-07-29 | 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452782A (en) * | 2010-11-01 | 2012-05-16 | 宇星科技发展(深圳)有限公司 | Inorganic composite conditioner for effective sludge dehydrating |
| CN102875070A (en) * | 2012-08-25 | 2013-01-16 | 马鞍山豹龙新型建材有限公司 | Acetylene sludge aerated concrete block and preparation method thereof |
-
2013
- 2013-07-05 CN CN201310282344.1A patent/CN103449796B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452782A (en) * | 2010-11-01 | 2012-05-16 | 宇星科技发展(深圳)有限公司 | Inorganic composite conditioner for effective sludge dehydrating |
| CN102875070A (en) * | 2012-08-25 | 2013-01-16 | 马鞍山豹龙新型建材有限公司 | Acetylene sludge aerated concrete block and preparation method thereof |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113149607A (en) * | 2021-04-14 | 2021-07-23 | 天津城建大学 | Sludge brick heavy metal curing agent, sludge brick and preparation method of sludge brick |
| 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 |
| CN114804735A (en) * | 2022-04-27 | 2022-07-29 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103449796B (en) | 2018-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103449796A (en) | Sludge autoclaved brick and preparation method thereof | |
| CN104045298B (en) | A kind of preparation method of phosphogypsum base sludge drying agent and the application on dewatered sludge thereof | |
| CN103553492B (en) | It is a kind of that with polyaluminium waste slag of aluminum and red mud, to be major ingredient non-burning brick and preparation method thereof | |
| CN102765914B (en) | Building garbage baking-free brick or building block and preparation method thereof | |
| CN107721270B (en) | Method for preparing non-sintered water permeable brick by using municipal sludge | |
| CN102070352A (en) | Method for recycling dewatered sludge, channel sediment and fly ash | |
| CN102161562B (en) | Process for treating excess sludge by utilizing fly ash | |
| CN102515588A (en) | Ecotypic cementing material | |
| CN107721375A (en) | A kind of method that sewage treatment plant's dewatered sludge suppresses non-autoclaved and unburned wall bulk | |
| CN106904924A (en) | The system and method for 3D printing material is built using municipal waste and Industrial Solid Waste | |
| CN106431028A (en) | Construction waste red brick powder and coal ash geopolymer material and preparation method thereof | |
| CN105130221B (en) | The method of comprehensive utilization discarded concrete and sludge system ecology clinker | |
| CN101962590A (en) | Regenerative coal produced by multiple kinds of oily sludge in oil refinery and preparation method thereof | |
| CN103553556A (en) | Method for producing building ceramsites by using coal slime, municipal sludge and desulfurized fly ash | |
| CN113277815A (en) | Sludge curing agent for ecological planting and preparation method thereof | |
| CN103951298B (en) | A kind of preparation method of titanium gypsum base composite gelled material and the application in dewatered sludge | |
| CN101560110B (en) | Spherical light porous material for wastewater treatment | |
| CN107188601A (en) | A kind of method that utilization city sewage and sludge prepares light porous haydite | |
| CN107311576A (en) | A kind of low alkalinity ecological concrete and preparation method thereof | |
| CN109912289A (en) | A kind of industrialized preparing process and system of sludge autoclaved brick | |
| CN104803656B (en) | Method used for preparing sintered bricks with modified sludge | |
| CN105819960A (en) | Technology utilizing steel slag and city domestic sludge to produce sustained-release silicon fertilizer | |
| CN101891367B (en) | Solidification and stabilization method of urban sludge | |
| CN101830613B (en) | Method for manufacturing autoclaved sand-lime brick or flyash brick as well as fertilizer and grease by sludge | |
| CN102643107B (en) | Calcination-free desulfurized gypsum-based ceramsite concrete perforated brick |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |