CN107602041B - Sludge environment-friendly baking-free brick and preparation method thereof - Google Patents
Sludge environment-friendly baking-free brick and preparation method thereof Download PDFInfo
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- CN107602041B CN107602041B CN201710924589.8A CN201710924589A CN107602041B CN 107602041 B CN107602041 B CN 107602041B CN 201710924589 A CN201710924589 A CN 201710924589A CN 107602041 B CN107602041 B CN 107602041B
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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
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses an environment-friendly sludge baking-free brick, which comprises the following raw materials in percentage by weight: 30-60% of waste mud, 5-25% of coarse sand, 5-25% of silicon-aluminum-iron-calcium oxide, 2-20% of stone powder, 2-20% of quicklime and 2-20% of gypsum; the waste mud is sludge or/and sludge; the silicon-aluminum-iron-calcium oxide is one or a mixture of more of fly ash, fine coal slag, slag powder or coal gangue. The invention can realize resource utilization of sludge/sludge, has simple raw material composition and low cost, ensures that the product has the characteristics of high breaking strength, high compressive strength, good wear resistance, strong freeze-thaw resistance and the like through the optimization of the raw material proportion, has low leaching amount of heavy metal in the baking-free brick, no odor, environmental protection and safety, is easy for large-scale batch production, and can be applied to the engineering construction fields of municipal square pavement, sidewalk pavement, hydraulic engineering slope protection and the like.
Description
Technical Field
The invention relates to the technical field of baking-free bricks, in particular to an environment-friendly sludge baking-free brick and a preparation method thereof.
Background
A large amount of sludge or sludge is generated in hydraulic engineering such as rapid urbanization construction, harbor construction and maintenance, river and lake construction and maintenance and the like in China, and the problems of river and ocean pollution, generated stacking pollutant diffusion, farmland occupation and the like can be caused by common sludge/sludge treatment methods such as ocean dumping, stacking airing and nearby burying. For years, China mainly uses clay to sinter bricks, uses clay as a main raw material to destroy cultivated lands, and has high energy consumption in clay sintering production, so that the research on waste clay raw materials and the preparation of sintered bricks by using other novel geotechnical materials such as sludge or silt have important significance for protecting cultivated lands and saving energy.
Chinese patent document CN1724446A discloses a wall material and a method for processing wall bricks by using the material, which comprises the following materials in parts by weight: 20-80 parts of sludge, 0-60 parts of silt, 10-40 parts of fly ash and 0-5 parts of additive. The processing steps are that the sludge and the fly ash are mixed to prepare a green body, and the green body is dried and then crushed to obtain dry powder; then mixing, grinding and crushing 0-45 wt% of dry powder, 0-60 wt% of silt, 0-80 wt% of sludge, 10-40 wt% of fly ash and 0-5 wt% of additive, and adding deodorant or chlorine dioxide bactericide to obtain a blank; and drying after blank making, and roasting at 900-1100 ℃ for 18-36 hours to obtain the finished product brick. Although the method is environment-friendly, the brick has long firing time and high energy consumption, and the prepared brick has unstable performance and is easy to crack or fall off in the using process.
The Chinese patent application CN201710029772.1 discloses a sludge and sludge baked brick, which is prepared from the following baked raw materials in parts by weight according to absolute dry weight: 30-45% of municipal sludge, 35-60% of river and lake sludge with the solid content of 60-70%, 5-10% of fly ash and 5-10% of additives after thermal hydrolysis pretreatment and anaerobic digestion treatment in sequence. The pretreatment process of the sludge and silt is very complex, and the performance of the baked brick prepared by the additive is unstable, and cracks or corner drops are easy to occur.
In summary, the baking-free brick prepared by using sludge/sludge at present has the problems of long time consumption, unstable product weight, difficult achievement of the folding resistance, compressive strength, wear resistance and freeze-thaw resistance, immature production process, long processing time, high energy consumption, unstable product performance and the like, so that further intensive research on the preparation of the baking-free brick by using sludge/sludge is urgently needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the sludge environment-friendly baking-free brick with simple raw material composition and low cost and the preparation method thereof, the baking-free brick is prepared by solidifying the sludge/sludge by using a special curing agent and forming good gradation by using coarse sand, silicon-aluminum-iron-calcium oxide and stone powder, has the characteristics of folding resistance, high compressive strength, good wear resistance, strong freeze-thaw resistance and the like, realizes the resource utilization of the sludge and the sludge in rivers and lakes, changes waste into valuable and protects the environment; meanwhile, the steam-pressing process is improved, the steam-pressing time is shortened as much as possible, the production energy consumption is reduced, the production period is shortened, and the production efficiency and the production cost of the product are improved.
The technical scheme adopted by the invention is as follows: the environment-friendly sludge baking-free brick comprises the following raw materials in percentage by weight: 30-60% of waste mud, 5-25% of coarse sand, 5-25% of silicon-aluminum-iron-calcium oxide, 2-20% of stone powder, 2-20% of quicklime and 2-20% of gypsum; the waste mud is sludge or/and sludge; the silicon-aluminum-iron-calcium oxide is one or a mixture of more of fly ash, fine coal slag, slag powder or coal gangue.
The invention uses sludge or/and sludge with low price and silicon-aluminum-iron-calcium oxide as main raw materials, thereby not only being capable of locally obtaining materials, changing waste into valuable and protecting the environment, but also being capable of greatly reducing the production cost and improving the production benefit; coarse sand and stone powder are matched in the sludge or/and the sludge and the silicon-aluminum-iron-calcium oxide, so that the grain sizes of the raw materials are matched, the uniformity and the high strength of the skeleton of the finished brick product are favorably ensured, and the compression strength and the breaking strength of the finished brick product can be further optimized by repeatedly optimizing and adjusting the proportion of the raw materials; the quicklime and the gypsum are added into the raw materials, so that the plasticity of the produced mixed raw materials can be adjusted, the stirring forming processing is convenient, and the internal uniformity, the compressive and flexural strength, the wear resistance and the freeze-thaw resistance of the green bricks and the finished bricks can be improved; in addition, the addition of the silicon-aluminum-iron-calcium oxide can improve the surface gloss and the fire resistance and heat insulation of the product, and the fly ash, the fine coal slag or the slag powder and the quick lime can react with acidic substances in the sludge/sludge to achieve the effects of adjusting acidity, sterilizing and deodorizing, so that the stability of the product is improved.
Preferably, the sludge environment-friendly baking-free brick comprises the following raw materials in percentage by weight: 35-50% of waste mud, 10-20% of coarse sand, 10-20% of silicon-aluminum-iron-calcium oxide, 5-15% of stone powder, 5-15% of quicklime and 5-15% of gypsum.
Preferably, the sludge environment-friendly baking-free brick comprises the following raw materials in percentage by weight: 40% of waste mud, 15% of coarse sand, 15% of silicon-aluminum-iron-calcium oxide, 10% of stone powder, 10% of quicklime and 10% of gypsum.
Preferably, the waste sludge is sludge and sludge in a weight ratio of 1: 2-5 in proportion.
Preferably, the silicon-aluminum-iron-calcium oxide is prepared from fly ash, fine coal slag and slag powder in a weight ratio of 5: 1-2: 1-2, and mixing.
As the further optimization of the baking-free brick, the waste mud is mud powder which is obtained by processing the waste mud with a special curing agent, has the water content of less than or equal to 15 percent, and then filtering the mud powder by pressure filtration, drying and double-roller grinding and sieving the mud powder by a 100-mesh sieve; the content of chitosan in the special curing agent is 1-5%. The sludge/silt is adopted as the raw material to prepare the baking-free brick, the sludge/silt is required to be pretreated, but the pretreatment process of most of the sludge/silt is very complicated, and additives such as deodorization, sterilization and the like are also required to be added into the raw material of the baking-free brick after treatment to prepare the finished brick which can be used for leaving the factory.
Preferably, the waste mud is treated by a special curing agent and then has the water content of 2-7%,
as further optimization of the sludge environment-friendly baking-free brick, the grain size of the silicon-aluminum-iron-calcium oxide is less than or equal to 1 mm.
As further optimization of the sludge environment-friendly baking-free brick, more than 80% of grains of the coarse sand have the grain diameter of 0.5-1 mm.
As further optimization of the sludge environment-friendly baking-free brick, the stone powder is formed by waste concrete and crushed stone or stone powder bricks, the particle size of the stone powder is 3-7 mm, and the sludge content is less than 2%.
As further optimization of the environment-friendly sludge baking-free brick, the raw materials can also comprise 0.5-5% of one or more additives of a heat-resistant agent, a flocculating agent and an anti-cracking agent. The heat-resistant agent can be one or a mixture of more of zirconia, ceria, oxide and titania. The flocculating agent can be one or a mixture of more of ferric trichloride, polymeric ferric trichloride and polyacrylamide. The anti-cracking agent can be one or more of sisal fiber, straw fiber, polypropylene fiber, swelling agent, wood dust and bran. The addition of the additives of the heat-resistant agent, the flocculating agent and the anti-cracking agent further improves the processing performance of raw materials and finished products and improves the stability of the products.
The invention also discloses a preparation method of the sludge environment-friendly baking-free brick, which comprises the following steps: sequentially metering the raw materials in a stirring container according to the weight percentage; II, adding 2-20% of water, and stirring and mixing uniformly to obtain a mixture; III, pressing and forming the mixture by an oil press to obtain a green brick; IV, heating the formed green brick to 160-200 ℃ under 0.62-1.57 MPa, and then performing constant-temperature steam curing for 4-8 h; and V, naturally cooling to prepare the sludge environment-friendly baking-free brick. The process is simple and efficient, is not influenced by external weather temperature and humidity, the autoclaving time is less than 12 hours, the temperature is 160-200 ℃, and the performance of the final product brick is stable.
As an optimization of the preparation method of the sludge environment-friendly baking-free brick, in the step IV, the green brick is heated to 180 ℃ under 1MPa and then is subjected to constant-temperature steam curing, the heating time is 1.5 hours, and the constant-temperature steam curing time is 6 hours.
Compared with the prior art, the invention has the beneficial effects that: (1) the method has the advantages of simple raw materials, low price, production cost saving, capacity of taking the sludge/sludge on site, changing waste into valuable, no pollution to the environment, realization of resource utilization of the sludge/sludge, avoidance of pollution transfer and secondary pollution, and capability of providing an effective disposal mode for disposing the sludge/sludge and waste earthwork of urban construction projects; (2) the raw materials are matched and proportioned reasonably, the silt or/and the sludge and the silicon-aluminum-iron-calcium oxide are used as main raw materials and are matched with the coarse sand, the stone powder, the quicklime and the gypsum, so that the product is high in forming speed and uniform in interior, and the folding strength, the compressive strength, the wear resistance and the freeze-thaw resistance of the finished brick are improved; (3) the invention adopts the chitosan-containing curing agent to carry out pretreatment on the sludge/silt, not only can effectively adsorb heavy metal, destroy microbial structure and hydrolyze organic pollutants, but also can eliminate stink while reducing pollution, so that additives such as deodorization, sterilization and the like do not need to be added into the raw materials, the production efficiency is improved, the production cost is reduced, the prepared baking-free brick is almost free of heavy metal leaching, does not cause harm to human bodies, and is more environment-friendly and reliable; (4) the invention adopts high-pressure steam curing to avoid air pollution, and through the adjustment of the steam-pressing process, the production period is shortened, and simultaneously, the internal defects of the product are ensured to be few, so that the product stability is better, the production energy consumption is reduced, the production cost is further saved, and the invention is suitable for large-scale popularization and use.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
As a preferred embodiment, the preparation method of the baking-free brick described in the following examples and comparative examples comprises the following steps: sequentially metering the raw materials in a stirring container according to the weight percentage; II, adding 2-20% of water, and stirring and mixing uniformly to obtain a mixture; III, pressing and forming the mixture by an oil press to obtain a green brick; IV, heating the formed green brick to 160-200 ℃ under 0.62-1.57 MPa, and then performing constant-temperature steam curing for 4-8 h; and V, naturally cooling to prepare the sludge environment-friendly baking-free brick. The process is simple and efficient, is not influenced by external weather temperature and humidity, the autoclaving time is less than 12 hours, the temperature is 160-200 ℃, and the performance of the final product brick is stable.
The inventors have found that adjusting within the parameters defined in the above preparation method has little effect on the efficacy of the resulting baking-free bricks, and thus the above method is a preferred preparation method of the present invention.
The process of the present invention will be further described below by taking specific examples of the conditions for carrying out the process.
Example 1
The environment-friendly sludge baking-free brick comprises the following raw materials in percentage by weight: 40% of waste mud, 15% of coarse sand, 15% of silicon-aluminum-iron-calcium oxide, 10% of stone powder, 10% of quicklime and 10% of gypsum;
wherein the waste sludge is sludge powder which is obtained by treating the waste sludge with a special curing agent to ensure that the water content is 4 percent, and then filtering the waste sludge through a 100-mesh sieve after filter pressing, drying and double-roller grinding; the silicon-aluminum-iron-calcium oxide is fly ash.
The special curing agent is a mixture of calcium oxide, cement, polyacrylamide and chitosan, and the content of the chitosan is 3%.
The grain size of the silicon-aluminum-iron-calcium oxide is less than or equal to 1 mm; the particle size of more than 80% of the coarse sand particles is 0.5-1 mm; the stone powder is made of waste concrete and crushed stone or stone powder bricks, the particle size of the stone powder is 3-7 mm, and the mud content is less than 2%.
The preparation method of the sludge environment-friendly baking-free brick comprises the following steps: sequentially metering the raw materials in a stirring container according to the weight percentage; II, adding 15% of water, stirring and mixing uniformly to obtain a mixture; III, pressing and forming the mixture by an oil press to obtain a green brick; IV, heating the formed green brick to 180 ℃ under 1MPa for 1.5h, and then performing constant-temperature steam curing for 6 h; and V, naturally cooling for 1.5 hours to obtain the sludge environment-friendly baking-free brick.
Example 2
The environment-friendly sludge baking-free brick comprises the following raw materials in percentage by weight: 50% of waste mud, 5% of coarse sand, 22% of silicon-aluminum-iron-calcium oxide, 8% of stone powder, 13% of quicklime and 2% of gypsum;
the waste sludge is sludge powder which is obtained by treating the waste sludge with a special curing agent to ensure that the water content is 7%, performing filter pressing, drying and double-roller grinding, and sieving with a 100-mesh sieve, wherein the content of chitosan in the special curing agent is 5%; the silicon-aluminum-iron-calcium oxide is fine coal slag.
The grain size of the silicon-aluminum-iron-calcium oxide is less than or equal to 1 mm; the particle size of more than 80% of the coarse sand particles is 0.5-1 mm; the stone powder is made of waste concrete and crushed stone or stone powder bricks, the particle size of the stone powder is 3-7 mm, and the mud content is less than 2%.
The rest is the same as in example 1.
Example 3
The environment-friendly sludge baking-free brick comprises the following raw materials in percentage by weight: 30% of waste mud, 23% of coarse sand, 8% of silicon-aluminum-iron-calcium oxide, 17% of stone powder, 5% of quicklime and 17% of gypsum;
wherein, the sludge with the water content of 6 percent and the sludge with the water content of 5 percent after the waste sludge is treated by the special curing agent are mixed according to the weight ratio of 2: 1, and then filtering, drying and grinding by a pair of rollers, and sieving by a 100-mesh sieve to obtain mixed mud powder; the content of chitosan in the special curing agent is 2%; the silicon-aluminum-iron-calcium oxide is prepared from fly ash, fine coal slag and slag powder in a weight ratio of (5): 2: 1, and mixing the components in a ratio of 1.
The grain size of the silicon-aluminum-iron-calcium oxide is less than or equal to 1 mm; the particle size of more than 80% of the coarse sand particles is 0.5-1 mm; the stone powder is made of waste concrete and crushed stone or stone powder bricks, the particle size of the stone powder is 3-7 mm, and the mud content is less than 2%.
The rest is the same as in example 1.
Example 4
The environment-friendly sludge baking-free brick comprises the following raw materials in percentage by weight: 60% of waste mud, 12% of coarse sand, 13% of silicon-aluminum-iron-calcium oxide, 3% of stone powder, 8% of quicklime and 4% of gypsum;
wherein, the sludge with the water content of 5.2 percent and the sludge with the water content of 6.8 percent are treated by the special curing agent, and the ratio of the water content of the sludge to the water content of the sludge is 2: 5, and then filtering, drying and grinding by a pair of rollers, and sieving by a 100-mesh sieve to obtain mixed mud powder; the content of chitosan in the special curing agent is 4%; the silicon-aluminum-iron-calcium oxide is prepared from fly ash and fine coal slag in a weight ratio of (4): 3, and mixing the components in a ratio of 3.
The grain size of the silicon-aluminum-iron-calcium oxide is less than or equal to 1 mm; the particle size of more than 80% of the coarse sand particles is 0.5-1 mm; the stone powder is made of waste concrete and crushed stone or stone powder bricks, the particle size of the stone powder is 3-7 mm, and the mud content is less than 2%.
The rest is the same as in example 1.
Example 5
An environment-friendly sludge baking-free brick, which is different from the brick in the embodiment 1 in that: the waste sludge is sludge powder which is obtained by treating the waste sludge with a special curing agent to ensure that the water content is 6.5 percent, and then performing filter pressing, drying and double-roller grinding on the waste sludge and sieving the waste sludge with a 100-mesh sieve; the content of chitosan in the special curing agent is 3.5 percent; the silicon-aluminum-iron-calcium oxide is prepared from fly ash, fine coal slag and slag powder in a weight ratio of (5): 1.5: 1, and mixing the components in a ratio of 1.
The rest is the same as in example 1.
Example 6
An environment-friendly sludge baking-free brick, which is different from the brick in the embodiment 1 in that: the waste sludge is treated by a special curing agent, the water content of the waste sludge is 12%, and then the waste sludge is subjected to filter pressing, drying and roll milling and is sieved by a 100-mesh sieve to obtain sludge powder, wherein the content of chitosan in the special curing agent is 1%; the silicon-aluminum-iron-calcium oxide is prepared from slag powder and coal gangue in a weight ratio of 3: 5, and mixing the components in a ratio of 5.
The rest is the same as in example 1.
Example 7
An environment-friendly sludge baking-free brick, which is different from the brick in the embodiment 1 in that: the waste sludge is sludge with water content of 6.5 percent and sludge with water content of 8.6 percent after being treated by a special curing agent, and the weight ratio of the sludge to the sludge is 2.5: 2, and then filtering, drying and grinding by a pair of rollers, and sieving by a 100-mesh sieve to obtain mixed mud powder; the content of chitosan in the special curing agent is 5 percent; the silicon-aluminum-iron-calcium oxide is prepared from fly ash, fine coal slag, slag powder and coal gangue in a weight ratio of 1: 2: 1: 1, and mixing the components in a ratio of 1.
The rest is the same as in example 3.
Example 8
An environment-friendly sludge baking-free brick, which is different from the brick in the embodiment 1 in that: the waste sludge is sludge powder which is obtained by treating the waste sludge with a special curing agent to ensure that the water content is 6 percent, and then filtering the waste sludge through a 100-mesh sieve after filter pressing, drying and double-roller grinding; the content of chitosan in the special curing agent is 4%; the silicon-aluminum-iron-calcium oxide is prepared from fly ash, slag powder and coal gangue in a weight ratio of 3: 1: 4, and mixing the components in a ratio of 4.
The rest is the same as in example 1.
Comparative example 1
A baking-free brick, which is different from the brick of the embodiment 1 in that: coarse sand and stone powder are removed, the content of the waste mud is 55 percent, and the content of the fly ash is 25 percent.
The rest is the same as in example 1.
Comparative example 2
A baking-free brick, which is different from the brick of the embodiment 1 in that: the special curing agent is a mixture of calcium oxide, cement and polyacrylamide.
Comparative example 3
A baking-free brick, which is different from the brick of the embodiment 1 in that: 70% of waste mud, 2% of coarse sand, 15% of silicon-aluminum-iron-calcium oxide, 2% of stone powder, 1% of quicklime and 10% of gypsum;
the grain size of the silicon-aluminum-iron-calcium oxide is less than or equal to 1 mm; the particle size of more than 80% of the coarse sand particles is 0.5-1 mm; the stone powder is made of waste concrete and crushed stone or stone powder bricks, the particle size of the stone powder is 3-7 mm, and the mud content is less than 2%.
The preparation method of the baking-free brick comprises the following steps: sequentially metering the raw materials in a stirring container according to the weight percentage; II, adding 30% of water, stirring and mixing uniformly to obtain a mixture; III, pressing and forming the mixture by an oil press to obtain a green brick; IV, heating the formed green brick at 1MPa for 1 hour to 180 ℃, and then performing constant-temperature steam curing for 5.8 hours; and V, naturally cooling to obtain the baking-free brick.
The rest is the same as in example 1.
The baking-free bricks of examples 1-8 and comparative examples 1-3 and common bricks were subjected to compressive strength, flexural strength, freeze-thaw resistance, wear resistance and heavy metal curing effect tests according to the enterprise standards, and the results are shown in the following table:
the test results show that the sludge environment-friendly baking-free brick prepared in the embodiments 1-8 of the invention has higher compression resistance, breaking strength, freeze-thaw resistance and wear resistance than the baking-free brick and the common brick of the comparative examples, wherein the baking-free brick in the embodiment 1 has the best performance. Compared with the embodiment 1, the baking-free brick obtained in the comparative example 1 has lower compressive and flexural strength of the finished brick product due to unreasonable aggregate grading in the baking-free brick because the comparative example 1 does not contain coarse sand and stone powder; compared with the example 1, the curing agent of the comparative example 2 does not contain chitosan, the leaching amount of heavy metal in the baking-free brick obtained in the comparative example 2 is higher, if the baking-free brick is not treated, the baking-free brick has larger harm to human bodies and is not suitable for popularization and use, the adoption of the curing agent containing chitosan is beneficial to reducing the leaching amount of heavy metal in the baking-free brick, and the effect of curing the heavy metal is good; compared with the example 1, the comparative example 3 has higher waste mud amount, poorer freeze-thaw resistance and wear resistance and poorer finished product stability.
In conclusion, the baking-free brick prepared by the invention has better compressive strength, breaking strength, freeze-thaw resistance and wear resistance, has lower leaching amount of heavy metals in the baking-free brick, no odor, environmental protection, safety, low production cost and easy large-scale batch production, and can replace common bricks to be used in the engineering construction fields of municipal square pavement, sidewalk pavement, water conservancy engineering slope protection and the like.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The environment-friendly sludge baking-free brick is characterized by comprising the following raw materials in percentage by weight: 40% of waste mud, 15% of coarse sand, 15% of silicon-aluminum-iron-calcium oxide, 10% of stone powder, 10% of quicklime and 10% of gypsum; the waste mud is sludge or/and sludge; the silicon-aluminum-iron-calcium oxide is one or a mixture of more of fly ash, fine coal slag, slag powder or coal gangue; the preparation method of the sludge environment-friendly baking-free brick comprises the following steps: sequentially metering the raw materials in a stirring container according to the weight percentage; II, adding 2-20% of water, and stirring and mixing uniformly to obtain a mixture; III, pressing and forming the mixture by an oil press to obtain a green brick; IV, heating the formed green brick to 160-200 ℃ under 0.62-1.57 MPa, and then performing constant-temperature steam curing for 4-8 h; naturally cooling to prepare the sludge environment-friendly baking-free brick;
the waste mud is mud powder which is obtained by processing the waste mud by a special curing agent to ensure that the water content is less than or equal to 15 percent, and then performing filter pressing, drying and double-roller grinding on the waste mud and sieving the waste mud by a 100-mesh sieve; the content of chitosan in the special curing agent is 1-5%.
2. The environment-friendly sludge baking-free brick as claimed in claim 1, wherein the grain size of the silicon-aluminum-iron-calcium oxide is less than or equal to 1 mm.
3. The environment-friendly sludge baking-free brick as claimed in claim 1, wherein more than 80% of the coarse sand particles have a particle size of 0.5-1 mm.
4. The environment-friendly sludge baking-free brick as claimed in claim 1, wherein the stone powder is made of waste concrete, crushed stone or stone powder brick, the particle size of the brick is 3-7 mm, and the sludge content is less than 2%.
5. The environment-friendly sludge baking-free brick as claimed in claim 1, wherein the green brick of step IV is subjected to constant temperature steam curing after being heated to 180 ℃ under 1MPa, wherein the heating time is 1.5h, and the constant temperature steam curing time is 6 h.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108817036A (en) * | 2018-06-12 | 2018-11-16 | 合肥荣桂环保科技有限公司 | A kind of waste incineration slag processing method |
| CN108975851A (en) * | 2018-08-30 | 2018-12-11 | 林子轩 | A kind of desulfurized gypsum is non-burning brick and preparation method thereof |
| CN109320151A (en) * | 2018-12-19 | 2019-02-12 | 建德市东胜建材有限公司 | A kind of environment friendly brick and preparation method thereof |
| CN109574569A (en) * | 2019-01-25 | 2019-04-05 | 陶祖岐 | Non-burning brick and its production method |
| CN109809781A (en) * | 2019-03-08 | 2019-05-28 | 江南大学 | Fabricated construction lightweight wall key technology is done in Dredged bed mud solidification |
| CN111704396B (en) * | 2020-05-15 | 2022-04-29 | 福建省阳山新型建材有限公司 | Method for preparing environment-friendly brick from sewage sludge |
| CN112279615A (en) * | 2020-10-12 | 2021-01-29 | 盐城工学院 | Curing process for improving strength of clay 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103102133A (en) * | 2013-01-29 | 2013-05-15 | 江苏省交通规划设计院股份有限公司 | Sludge baking-free brick and preparation method thereof |
| CN103664126A (en) * | 2012-09-20 | 2014-03-26 | 深圳市海川实业股份有限公司 | Sludge curing treatment agent and method for treating sludge by use of curing treatment agent |
| CN104788063A (en) * | 2015-04-29 | 2015-07-22 | 河海大学 | Unfired and pressing-free sludge brick and preparation method thereof |
| CN106278122A (en) * | 2016-08-16 | 2017-01-04 | 明光市凯旋新型建材厂 | Hollow brick for building prepared by a kind of dredging silt and preparation method thereof |
| CN107200518A (en) * | 2017-06-14 | 2017-09-26 | 合肥易美特建材有限公司 | A kind of baking-free brick and preparation method thereof |
-
2017
- 2017-09-30 CN CN201710924589.8A patent/CN107602041B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103664126A (en) * | 2012-09-20 | 2014-03-26 | 深圳市海川实业股份有限公司 | Sludge curing treatment agent and method for treating sludge by use of curing treatment agent |
| CN103102133A (en) * | 2013-01-29 | 2013-05-15 | 江苏省交通规划设计院股份有限公司 | Sludge baking-free brick and preparation method thereof |
| CN104788063A (en) * | 2015-04-29 | 2015-07-22 | 河海大学 | Unfired and pressing-free sludge brick and preparation method thereof |
| CN106278122A (en) * | 2016-08-16 | 2017-01-04 | 明光市凯旋新型建材厂 | Hollow brick for building prepared by a kind of dredging silt and preparation method thereof |
| CN107200518A (en) * | 2017-06-14 | 2017-09-26 | 合肥易美特建材有限公司 | A kind of baking-free brick and preparation method thereof |
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