CN111995306A - Non-fired ceramsite based on urban river sludge and regenerated garbage and preparation method thereof - Google Patents
Non-fired ceramsite based on urban river sludge and regenerated garbage and preparation method thereof Download PDFInfo
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- CN111995306A CN111995306A CN202010890204.2A CN202010890204A CN111995306A CN 111995306 A CN111995306 A CN 111995306A CN 202010890204 A CN202010890204 A CN 202010890204A CN 111995306 A CN111995306 A CN 111995306A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2092—Resistance against biological degradation
Abstract
The invention discloses a non-fired ceramsite based on urban river sludge and regenerated garbage and a preparation method thereof, wherein the non-fired ceramsite comprises 50-70 parts of river sludge by weight; 20-40 parts of solid waste garbage powder; 10-20 parts of cement; 1-5 parts of a pore-forming agent; 7-12 parts of an excitant. During preparation, the solid waste garbage powder and the cement are weighed according to the proportion, then the solid waste garbage powder and the cement are fully mixed, and then the pore-forming agent and the exciting agent are added and fully stirred to obtain a mixture; then adding the river sludge and fully stirring; finally, pugging the mixture by a pug mill, and putting the mixture into a pelletizing granulator to prepare the ceramsite. The technology uses the river sludge and solid waste garbage powder as the raw materials of the ceramsite, so that the river sludge and the garbage are recycled, the cost of the ceramsite is reduced, the environment-friendly function is achieved, and the environment-friendly effect is achieved.
Description
Technical Field
The invention relates to the technical field of ceramsite preparation, in particular to a non-fired ceramsite based on urban river sludge and regenerated garbage and a preparation method thereof.
Background
In order to protect the environment and improve the resource utilization rate, in the 50 th century, the research on lightweight aggregate concrete was started in China, and the lightweight aggregate concrete enters a new era in the 90 th century. The fly ash ceramsite, the clay ceramsite and the expanded slag beads in the industrial waste have the effects of reducing the cost and improving the resource utilization rate. The lightweight aggregate is mixed into the pervious concrete, so that the weight and the cost of the pervious concrete can be reduced, and the use of raw materials and the maintenance of ecological balance are greatly influenced. Along with the development of the technology, the ceramsite is widely applied in the field of reconstruction and also in the field of environmental protection, for example, as a water purification material and the like.
Along with the progress of science and technology, the raw materials of the ceramsite are more and more extensive, and especially, a lot of waste materials are used as the raw materials, so that the cost of the ceramsite can be reduced, and the ecological environment-friendly effect can be ensured.
Urban river channels are often polluted seriously, a lot of sludge is accumulated at the river bottom, and along with large-scale treatment of rivers, the sludge in the river channels cannot be well recycled, so that the environment is polluted. Meanwhile, as urban population is more and more dense and economic, more and more garbage is generated, the garbage is usually solved by burning for power generation or landfill, and although the problem of garbage treatment is solved to a certain extent, new problems such as air pollution, water pollution and occupation of a large amount of urban land are generated.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a non-fired ceramsite based on urban river sludge and regenerated garbage and a preparation method thereof, aiming at preparing the ceramsite by taking the river sludge and the regenerated garbage as raw materials, reducing the preparation cost of the ceramsite, meeting the requirements of effective treatment of the river sludge and the garbage and ecological environmental protection.
In order to solve the above technical problems, one of the basic technical solutions proposed by the present invention is:
a non-fired ceramsite based on urban river sludge and regenerative garbage comprises the following components in parts by weight:
50-70 parts of river sludge; 20-40 parts of solid waste garbage powder; 10-20 parts of cement; 1-5 parts of a pore-forming agent; 7-12 parts of an excitant.
Furthermore, the river sludge is sludge with water content between 50% and 80% after being screened and filtered.
Further, the solid waste powder is a particulate matter with the particle size of 1-2 mm.
Further, the ratio of the pore-forming agent to the exciting agent is 1: 5.
further, 0.5-1 part of nano additive Al is also included2O3。
Further, the activator comprises a mixture of a compound of formula 1: 1 quicklime and gypsum.
On the other hand, the technical scheme of the invention also provides a preparation method of the non-fired ceramsite based on the municipal river sludge and the regenerated garbage, which comprises the following steps:
a: weighing 50-70 parts of river sludge, 20-40 parts of solid waste garbage powder, 10-20 parts of cement, 1-5 parts of pore-forming agent and 7-12 parts of exciting agent according to the weight percentage;
b: putting solid waste garbage powder and cement into a first stirrer, fully mixing, putting the pore-forming agent and the exciting agent into the first stirrer, and fully stirring to obtain a mixture;
C. putting the river sludge into a first stirrer, and fully stirring;
D. c, putting the mixture obtained in the step C into a pugging machine for pugging for 1 minute;
E. d, putting the mixture pugging in the step D into a pelletizing granulator to obtain 4-10mm of ceramsite;
F. and putting the ceramsite into a steam curing device for steam curing for 8-10 hours to obtain the baking-free ceramsite.
Further, the river sludge is sludge with water content of 50-80% after being screened and filtered, and is prepared by the following method:
digging out river sludge from a river channel, putting the sludge into sludge filtering equipment, spraying a large amount of water, and filtering large-particle substances in the sludge;
guiding the mixture of the filtered river sludge and water into a standing pool, adding an additive, uniformly stirring, and standing for 7 days;
pumping the upper water away and exposing to river sludge with water content of 50-80%.
Further, the solid waste powder is a particulate matter with the particle size of 1-2 mm; the preparation method comprises the following steps:
putting solid waste garbage into a garbage rotary sorting machine for sorting to obtain fine aggregate containing silt and construction garbage particles and large-size garbage;
putting the large-size garbage into a crusher for crushing, and then sorting the construction garbage through a sorting machine to obtain construction garbage coarse aggregate;
and (3) putting the fine aggregate and the coarse aggregate into another crusher, and then passing through a screen to obtain the particulate mixture with the particle size of 1-2 mm.
Further, 0.5-1 part of nano additive Al is also included2O3(ii) a After the pore-forming agent and the excitant are put into the mixture and stirred evenly, the nano additive Al is added2O3Adding and stirring uniformly.
The invention has the beneficial effects that:
the technical scheme of the invention provides a non-fired ceramsite based on urban river sludge and regenerative garbage, which comprises 50-70 parts of river sludge by weight; 20-40 parts of solid waste garbage powder; 10-20 parts of cement; 1-5 parts of a pore-forming agent; 7-12 parts of an excitant. During preparation, the solid waste garbage powder and the cement are weighed according to the proportion, then the solid waste garbage powder and the cement are fully mixed, and then the pore-forming agent and the exciting agent are added and fully stirred to obtain a mixture; then adding the river sludge and fully stirring; finally, pugging the mixture by a pug mill, and putting the mixture into a pelletizing granulator to prepare the ceramsite. The technology uses the river sludge and solid waste garbage powder as the raw materials of the ceramsite, so that the river sludge and the garbage are recycled, the cost of the ceramsite is reduced, the environment-friendly function is achieved, and the environment-friendly effect is achieved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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.
The technical scheme of the invention provides a non-fired ceramsite based on urban river sludge and regenerative garbage and a preparation method of the non-fired ceramsite based on the urban river sludge and the regenerative garbage; wherein, the non-fired ceramsite based on the urban river sludge and the regenerative garbage comprises 50-70 parts of river sludge by weight; 20-40 parts of solid waste garbage powder; 10-20 parts of cement; 1-5 parts of a pore-forming agent; 7-12 parts of an excitant. The technology can reduce the material cost because the river sludge and the solid waste garbage powder are mixed as one of the raw materials of the ceramsite, and importantly, the river sludge and the solid waste garbage can be absorbed, so that the influence of the substances on the ecological environment is reduced, and the treatment difficulty and the treatment cost of the traditional river sludge and the solid waste are reduced.
During the specific preparation, firstly, weighing 50-70 parts of river sludge, 20-40 parts of solid waste garbage powder, 10-20 parts of cement, 1-5 parts of pore-forming agent and 7-12 parts of exciting agent according to the weight percentage; then putting the solid waste garbage powder and the cement into a first stirrer, fully mixing, putting the pore-forming agent and the exciting agent into the first stirrer, and fully stirring to obtain a mixture; then putting the river sludge into a first stirrer, and fully stirring; putting the obtained mixture into a pugging machine for pugging for 1 minute; and finally putting the mixture after pugging into a pelletizing granulator to obtain 4-10mm of ceramsite, and putting the ceramsite into a steam curing device for steam curing for 8-10 hours to obtain the non-sintered ceramsite.
In general, the technology reduces the preparation cost of the ceramsite on one hand, and can receive and absorb part of river sludge and solid waste on the other hand, so that the ecological environment-friendly work is achieved, the damage to the environment caused by the treatment process of the river sludge and the solid waste is reduced, and the effects of energy conservation, low carbon, environment friendliness and the like are achieved.
The river sludge is sludge with water content of 50-80% after being screened and filtered. It will be appreciated that due to the large amount of non-sludge waste, such as plastics, rocks, waste metals, etc., present in the river sludge, it is desirable to sort the river sludge. The specific river sludge sorting method specifically comprises the following steps: digging out river sludge from a river channel, putting the sludge into sludge filtering equipment, spraying a large amount of water, and filtering large-particle substances in the sludge; guiding the mixture of the filtered river sludge and water into a standing pool, adding an additive, uniformly stirring, and standing for 7 days; pumping the upper water away and exposing to river sludge with water content of 50-80%. After the river sludge is mixed with a large amount of water, large particles wrapped by the river sludge can be separated, for example, garbage is separated, such as plastic, foam, metal, stone and the like can be cleaned, the mixture of the river sludge and the water flows out after passing through sludge filtering equipment, and the garbage such as the plastic, the foam, the metal, the stone and the like can be separated and sorted out; thereby realizing the filtration of the sludge in the river channel. Because the river sludge contains substances such as microorganisms, bacteria, heavy metals and the like, in the technical scheme, the additives are added to realize purification, for example, microbial agents are added to purify the microorganisms in the sludge; the purification of heavy metals in river sludge is realized by biological purification and extraction, for example, earthworms are put in the river sludge to purify the river sludge, and then inorganic salts or inorganic acids are added in the river sludge to purify the river sludge, for example, hydrochloric acid, phosphoric acid, sodium nitrate, ammonium nitrate and other additives. The specific purification method of the microorganisms and heavy metals in the river sludge adopts the existing technology for purification, and is not described herein, but the technical scheme is not considered to be fully disclosed. The mixture of the river course mud and the water after purifying is after stewing, and river course mud sinks into the bottom, and accessible water pump is taken out this moment, at last through modes such as solarization or heating for the water content of river course mud can between 50% -80%.
Wherein the solid waste powder is a particulate matter with the particle size of 1-2 mm; the preparation method comprises the following steps: putting solid waste garbage into a garbage rotary sorting machine for sorting to obtain fine aggregate containing silt and construction garbage particles and large-size garbage; putting the large-size garbage into a crusher for crushing, and then sorting the construction garbage through a sorting machine to obtain construction garbage coarse aggregate; and (3) putting the fine aggregate and the coarse aggregate into another crusher, and then passing through a screen to obtain the particles with the particle size of 1-2 mm. The technical scheme can recycle and utilize the recycled garbage of the solid waste in the production process of the ceramsite by recycling the silt and the construction waste in the solid waste as one of the raw materials of the ceramsite, thereby reducing the pressure of municipal waste treatment and achieving the effect of environmental protection. The garbage in the solid waste is all-purpose, and is composed of silt, construction garbage, domestic garbage, industrial garbage and the like. The scheme is mainly characterized in that silt and construction waste in solid waste are recycled and used as ceramsite raw materials.
Obtaining the ceramsite with the thickness of 4-10mm, putting the ceramsite into a steam curing device, and performing steam curing for 8-10 hours to obtain the baking-free ceramsite. Specifically, the worship is maintained in a steam curing device at the temperature of 70-80 ℃ for one day, and then is taken out and kept stand in a room with the temperature of 20-25 ℃ and the humidity of more than 90 percent for maintenance for one worship.
In order to increase the surface area of the ceramsite, 1-5 parts of pore-forming agent and 7-12 parts of exciting agent are added in the technical scheme. Specifically, when the ratio of the pore-forming agent to the activator is 1: 5, there is sufficient surface area. Wherein the preferred activator comprises a mixture of a 1: 1 quicklime and gypsum.
In addition, in order to purify the ceramsite and increase the function of the ceramsite, the technical scheme also comprises 0.5-1 part of nano additive Al2O3. By the nano additive Al2O3The effects of sterilization and disinfection are achieved, and meanwhile, in the using process of the ceramsite, the nano additive Al2O3The effect of the sterilization is achieved. During the specific preparation, the nano additive Al is added after the pore-forming agent and the excitant are put into the mixture and stirred evenly2O3Adding and stirring uniformly.
Wherein, the cement can adopt the cement with common marks on the market; the pore-forming agent may employ PEG.
The following are specific examples, the preparation methods employed are as described above and will not be described in detail.
Table 1: the components of the various examples;
table 2: index parameters for various embodiments;
| bulk Density (kg/m)3) | Barrel pressure intensity (Mpa) | Porosity (%) | Specific surface area (m)2/g) | |
| Example 1 | 731 | 5.1 | 70 | 10.32 |
| Example 2 | 724 | 5.4 | 67 | 10.25 |
| Example 3 | 702 | 4.9 | 63 | 9.86 |
| Example 4 | 730 | 5.2 | 72 | 12.53 |
| Example 5 | 726 | 5.6 | 68 | 11.74 |
| Example 6 | 703 | 5.0 | 65 | 11.21 |
| Comparative example 1 | 723 | 3.9 | 62 | 4.52 |
| Comparative example 2 | 714 | 4.2 | 61 | 4.23 |
| Comparative example 3 | 698 | 3.8 | 57 | 3.92 |
According to the test, the technical scheme uses the combination of the river sludge and the solid waste as the raw material of the non-sintered ceramsite, so that the barrel pressure strength is improved, the ecological environment protection is met, and the pollution is reduced; in addition, the addition of the exciting agent and the pore-forming agent is beneficial to improving the porosity, and the specific surface area is obviously improved by limiting the proportion of the exciting agent, the pore-forming agent and the quicklime and the gypsum.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A non-fired ceramsite based on urban river sludge and regenerative garbage comprises the following components in parts by weight:
50-70 parts of river sludge;
20-40 parts of solid waste garbage powder;
10-20 parts of cement;
1-5 parts of a pore-forming agent;
7-12 parts of an excitant.
2. The non-fired ceramsite of claim 1 based on municipal river sludge and recycled waste, wherein:
the river sludge is sludge with water content of 50-80% after being screened and filtered.
3. The non-fired ceramsite of claim 1 based on municipal river sludge and recycled waste, wherein:
the solid waste powder is a particulate matter with the particle size of 1-2 mm.
4. The non-fired ceramsite of claim 1 based on municipal river sludge and recycled waste, wherein:
the ratio of the pore-forming agent to the exciting agent is 1: 5.
5. the non-fired ceramsite of claim 1 based on municipal river sludge and recycled waste, wherein:
also comprises 0.5 to 1 portion of nano additive Al2O3。
6. The non-fired ceramsite of claim 1 based on municipal river sludge and recycled waste, wherein:
the exciting agent comprises the following components in a ratio of 1: 1 quicklime and gypsum.
7. A preparation method of non-fired ceramsite based on urban river sludge and regenerative garbage comprises the following steps:
a: weighing 50-70 parts of river sludge, 20-40 parts of solid waste garbage powder, 10-20 parts of cement, 1-5 parts of pore-forming agent and 7-12 parts of exciting agent according to the weight percentage;
b: putting solid waste garbage powder and cement into a first stirrer, fully mixing, putting the pore-forming agent and the exciting agent into the first stirrer, and fully stirring to obtain a mixture;
C. putting the river sludge into a first stirrer, and fully stirring;
D. c, putting the mixture obtained in the step C into a pugging machine for pugging for 1 minute;
E. d, putting the mixture pugging in the step D into a pelletizing granulator to obtain 4-10mm of ceramsite;
F. and putting the ceramsite into a steam curing device for steam curing for 8-10 hours to obtain the baking-free ceramsite.
8. The method for preparing baking-free ceramsite according to claim 7, wherein the baking-free ceramsite comprises the following components in parts by weight:
the river sludge is sludge with water content of 50-80% after being screened and filtered, and is prepared by the following method:
digging out river sludge from a river channel, putting the sludge into sludge filtering equipment, spraying a large amount of water, and filtering large-particle substances in the sludge;
guiding the mixture of the filtered river sludge and water into a standing pool, adding an additive, uniformly stirring, and standing for 7 days;
pumping the upper water away and exposing to river sludge with water content of 50-80%.
9. The method for preparing baking-free ceramsite according to claim 7, wherein the baking-free ceramsite comprises the following components in parts by weight:
the solid waste powder is a particulate matter with the particle size of 1-2 mm; the preparation method comprises the following steps:
putting solid waste garbage into a garbage rotary sorting machine for sorting to obtain fine aggregate containing silt and construction garbage particles and large-size garbage;
putting the large-size garbage into a crusher for crushing, and then sorting the construction garbage through a sorting machine to obtain construction garbage coarse aggregate;
and (3) putting the fine aggregate and the coarse aggregate into another crusher, and then passing through a screen to obtain the particulate mixture with the particle size of 1-2 mm.
10. The method for preparing baking-free ceramsite according to claim 7, wherein the baking-free ceramsite comprises the following components in parts by weight:
also comprises 0.5 to 1 portion of nano additive Al2O3(ii) a After the pore-forming agent and the excitant are put into the mixture and stirred evenly, the nano additive Al is added2O3Adding and stirring uniformly.
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| CN113582632A (en) * | 2021-09-14 | 2021-11-02 | 深圳市思力佳化工建材有限公司 | High-flow-state lightweight concrete, preparation method thereof and method for applying high-flow-state lightweight concrete to non-bearing wall |
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| CN113582632A (en) * | 2021-09-14 | 2021-11-02 | 深圳市思力佳化工建材有限公司 | High-flow-state lightweight concrete, preparation method thereof and method for applying high-flow-state lightweight concrete to non-bearing wall |
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Application publication date: 20201127 |