CN113896562A - Method for preparing porous ceramsite by using sludge and obtained porous ceramsite - Google Patents
Method for preparing porous ceramsite by using sludge and obtained porous ceramsite Download PDFInfo
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- CN113896562A CN113896562A CN202111136700.XA CN202111136700A CN113896562A CN 113896562 A CN113896562 A CN 113896562A CN 202111136700 A CN202111136700 A CN 202111136700A CN 113896562 A CN113896562 A CN 113896562A
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- 239000010802 sludge Substances 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000009279 wet oxidation reaction Methods 0.000 claims abstract description 21
- 238000005245 sintering Methods 0.000 claims abstract description 19
- 239000002699 waste material Substances 0.000 claims abstract description 18
- 239000010881 fly ash Substances 0.000 claims abstract description 17
- 208000005156 Dehydration Diseases 0.000 claims abstract description 16
- 230000018044 dehydration Effects 0.000 claims abstract description 16
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 15
- 238000010276 construction Methods 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000002203 pretreatment Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 11
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 9
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 2
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 7
- 239000002910 solid waste Substances 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 description 11
- 239000000126 substance Substances 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 7
- 239000013049 sediment Substances 0.000 description 6
- 238000005303 weighing Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003898 horticulture Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- -1 shale Substances 0.000 description 1
- XJKVPKYVPCWHFO-UHFFFAOYSA-N silicon;hydrate Chemical compound O.[Si] XJKVPKYVPCWHFO-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention relates to a method for preparing porous ceramsite by using sludge and the obtained porous ceramsite, wherein the method specifically comprises the following steps: 1) taking sludge subjected to pre-dehydration treatment, performing pre-treatment by adopting a wet oxidation reaction, and dehydrating to obtain solid sludge residues; 2) mixing the sludge residue obtained in the step 1), fly ash, construction waste and other additives to obtain a mixture; 3) and granulating, drying and sintering the mixture in sequence to obtain the porous ceramsite. Compared with the prior art, the wet oxidation method firstly realizes that the reduction of the sludge reaches more than 85 percent, simultaneously reduces the content of organic matters in the sludge, avoids the influence of smell in the sintering process of preparing the ceramsite, simultaneously realizes the effective utilization of waste resources such as sludge coupled fly ash and building concrete powder, reduces the discharge of solid waste, has high added value of products and realizes the high-valued utilization of the waste.
Description
Technical Field
The invention belongs to the technical field of solid waste recycling, and particularly relates to a method for preparing porous ceramsite by using sludge and the porous ceramsite prepared by the method.
Background
The sludge is bottom sediment generated in the wastewater treatment process, is generally complex in composition, and contains various inorganic substances and part of organic substances, wherein part of the sludge contains heavy metal substances. At present, the treatment of the sludge is generally completed by firstly dehydrating and drying and then selecting a disposal mode such as recycling, isolation landfill, harmless incineration and the like. The treatment of industrial sludge is always a difficult problem, and the heavy metal elements contained in the sludge also limit the resource utilization mode of the sludge. Therefore, the research on a new sludge treatment method has great significance.
Ceramsite is a ceramic particle, and is characterized by low density, high cylinder pressure strength, high porosity, high softening coefficient, good frost resistance, excellent alkali-resistant aggregate reactivity and the like, so that the ceramsite is widely applied to the fields of building materials, horticulture, food and beverage, fire-resistant heat-insulating materials, chemical industry, petroleum and the like, and the application field of the ceramsite is continuously expanded. The existing ceramsite is usually fired by natural raw materials such as shale, clay and the like, and with the consumption of natural mineral resources and the increase of cost, researchers also explore and industrially research the preparation of the ceramsite by using the sludge at present. For example, the chinese patent application No. 202010098061.1 discloses a ceramsite filter material prepared based on river sediment and a method thereof, wherein the method comprises the steps of drying and grinding the sediment, sieving the ground sediment, finally sieving the sediment powder for preparing the ceramsite, uniformly mixing the sediment powder, an inorganic additive and a binder in a ball mill to obtain a mixture, then stirring the mixture, adding water to prepare granules, and then drying, preheating, roasting and sintering the granules to obtain the ceramsite.
Along with the gradual increase of the sludge production, the coal-based solid waste fly ash yield is continuously increased in an energy form mainly based on coal electricity in China, the preparation of ceramsite products by coupling sludge with fly ash, building waste soil and other wastes has a prospect, the recycling of solid waste can be realized, but the main problems encountered at present are that the uniformity of the prepared ceramsite is poor, and the use of the ceramsite is influenced due to the poor performance of the ceramsite.
Patent CN112573901A discloses a method for preparing homogeneous porous ceramsite by using sludge, which comprises the following steps: 1) weighing the following raw materials in parts by weight: 20 to 70 parts of sludge, 0 to 20 parts of fly ash, 20 to 75 parts of construction waste soil, and silicon carbide accounting for 0.2 to 4 percent of the total weight of the sludge, the fly ash and the construction waste soil; mixing the sludge, optional fly ash, building waste soil, silicon carbide and water to obtain mixed slurry; 2) performing wet ball milling on the mixed slurry, and separating to obtain a ball-milled material; 3) granulating the ball-milled materials into balls to obtain ceramsite green balls; 4) and drying and sintering the ceramsite green ball to obtain the homogeneous porous ceramsite. Compared with the patent, the invention has the outstanding difference that the sludge in the raw material is sludge residue after wet oxidation pretreatment, the components of the mixture are completely different, and the others are also different
Disclosure of Invention
The invention aims to provide a method for preparing porous ceramsite by using sludge and the porous ceramsite prepared by the method.
The purpose of the invention is realized by the following technical scheme:
a method for preparing porous ceramsite by using sludge specifically comprises the following steps:
1) taking sludge subjected to pre-dehydration treatment, performing pre-treatment by adopting a wet oxidation reaction, and dehydrating to obtain solid sludge residues;
2) mixing the sludge residue obtained in the step 1), fly ash, construction waste and other additives to obtain a mixture;
3) and granulating, drying and sintering the mixture in sequence to obtain the porous ceramsite.
In the step 1), sludge is pre-dewatered by adopting a plate-and-frame filter press.
In the step 1), the water content of the sludge after the pre-dehydration treatment is 70-90%, generally about 80%.
In the step 1), the wet oxidation reaction temperature is 260-280 ℃, the reaction time is 1-2 h, and the reaction pressure is 5-6 MPa. The sludge residue which is one of the ceramsite raw materials has excellent performance after being subjected to wet oxidation pretreatment under the limited process conditions.
In the step 1), the mass of the sludge residue is less than 15% of the total weight of the initial sludge (the initial sludge refers to sludge with water content of about 80% and subjected to pre-dehydration), and the water content is not more than 40%.
In the step 2), the weight ratio of the sludge residue, the fly ash, the construction waste and other additives is (20-30%) (40-50%) (20-30%) (1-5%), and more preferably 25%: 45%: 25%: 5%.
In the step 2), the construction waste comprises construction concrete powder.
In the step 2), the other additives comprise silicon carbide, and the silicon carbide is used as the additives to be beneficial to improving the strength of the porous ceramsite.
In the step 3), the diameter of the coarse ceramsite product obtained through granulation is 10-50 mm. The ceramsite in the diameter range has wide application range.
In the step 3), the drying temperature is 80-110 ℃, and the time is 6-12 h. The porous ceramsite obtained by the treatment under the condition has good forming effect.
In the step 3), the sintering process specifically comprises the following steps: presintering for 1-2 h at 500-600 ℃, then sintering for 2-5 min at 900-1200 ℃, and finally cooling to obtain the porous ceramsite. The finished ceramsite products prepared from the raw materials with different sludge doping rates have different pore-forming optimal temperature critical points; the expansion degree of the ceramsite is increased along with the increase of the sintering temperature and stops when the ceramsite reaches the highest point; the porosity becomes larger with the temperature rise and is proportional to the expansion degree; the temperature time is prolonged, so that the porous ceramsite is formed and formed; the pore area distribution of the finished ceramsite product can occur in the sintering process, and the pore area with uniform pore diameter and density distribution in the finished ceramsite product is related to the heating uniformity of the ceramsite during molding and the degree of the bubbling reaction, so the drying and sintering conditions are very important.
A porous ceramsite prepared by the method.
The wet oxidation method is to oxidize organic pollutants into CO in a liquid phase by using air or oxygen as an oxidant under the conditions of high temperature (150-2And H2O and other inorganic matters or small molecular organic matters. The method has remarkable effect in treating high-concentration organic wastewater, wastewater and sludge containing toxic substances and substances difficult to biodegrade. Compared with the traditional biological treatment method, the wet oxidation method has the advantages of high efficiency, energy conservation, no secondary pollution and the like, and is widely applied to the wastewater and sewage in the petroleum, chemical and pharmaceutical industriesAnd (4) treating the mud.
Compared with the prior art, the invention has the following characteristics:
1) the reduction of the sludge is firstly realized to be more than 85 percent through wet oxidation, simultaneously the content of organic matters in the sludge is reduced, and the influence of smell in the process of preparing ceramsite by sintering is avoided.
2) According to the invention, the temperature and time in the preparation process of the sludge ceramsite are controlled, the sludge is subjected to pre-dehydration treatment, wet oxidation treatment and dehydration to reduce the water content of the sludge to 40%, and then the sludge is mixed with other raw materials and heated in two steps, so that the internal structure of the ceramsite is firmer, and various properties of the ceramsite can be further improved.
3) The method has the advantages of realizing effective utilization of waste resources such as sludge coupled fly ash and building concrete powder, reducing solid waste discharge, realizing high-value utilization of waste, having good social and economic benefits, optimizing the proportion of each raw material and improving the performance of the obtained porous ceramsite.
Detailed Description
The present invention will be described in detail with reference to specific examples.
Example 1
The preparation method of the porous ceramsite by adopting certain pharmaceutical sludge comprises the following specific steps:
the method is characterized in that certain pharmaceutical sludge (sludge of general biological, chemical and other pharmaceutical enterprises) (the water content is about 80% after plate frame dehydration) is subjected to wet oxidation pretreatment, the wet oxidation reaction temperature is 280 ℃, the reaction time is 1 hour, the reaction pressure is 5.5MPa, and the sludge residue is obtained after solid dehydration after reaction, so that the sludge reduction rate obtained through plate frame pre-dehydration is more than 85%, the VSS removal rate is more than 95%, the water content of the solid sludge residue is lower than 40%, and the VS/SS is less than 5%. Weighing sludge residue, fly ash, building concrete powder and silicon carbide as ceramsite raw materials according to the weight ratio of 25% to 45% to 25% to 5%, mixing, granulating, and drying at 105 ℃ for 6 hours (the diameter is 30 mm); then presintering for 2 hours at 550 ℃, and then sintering for 3 minutes at 1100 ℃; and cooling to obtain the porous ceramsite.
Example 2
The preparation method of the porous ceramsite by adopting certain pharmaceutical sludge comprises the following specific steps:
the method is characterized in that certain pharmaceutical sludge (sludge of general biological, chemical and other pharmaceutical enterprises) (the water content of the dewatered sludge is about 80 percent after plate frame dehydration) is subjected to wet oxidation pretreatment, the wet oxidation reaction temperature is 260 ℃, the reaction time is 2 hours, the reaction pressure is 6MPa, and the sludge residue is obtained by solid dehydration after reaction, so that the reduction of the plate frame dewatered sludge is more than 85 percent relative to the plate frame dewatered sludge, the VSS removal rate is more than 95 percent, the water content of the solid sludge residue is lower than 40 percent, and the VS/SS is less than 5 percent. Weighing sludge residue, fly ash, building concrete powder and silicon carbide as ceramsite raw materials according to the weight ratio of 20% to 50% to 29% to 1%, mixing, granulating, and drying at 80 ℃ for 12 hours (the diameter is 10 mm); then presintering for 1 hour at 600 ℃, and then sintering for 5 minutes at 900 ℃; and cooling to obtain the porous ceramsite.
Example 3
The preparation method of the porous ceramsite by adopting certain pharmaceutical sludge comprises the following specific steps:
the method is characterized in that certain pharmaceutical sludge (sludge of general biological, chemical and other pharmaceutical enterprises) (the water content of the dewatered sludge is about 80 percent after plate frame dehydration) is subjected to wet oxidation pretreatment, the wet oxidation reaction temperature is 270 ℃, the reaction time is 1.5 hours, the reaction pressure is 5MPa, and the sludge residue is obtained by solid dehydration after reaction, so that the reduction of the plate frame dewatered sludge is more than 85 percent relative to the plate frame dewatered sludge, the VSS removal rate is more than 95 percent, the water content of the solid sludge residue is lower than 40 percent, and the VS/SS is less than 5 percent. Weighing sludge residue, fly ash, building concrete powder and silicon carbide as ceramsite raw materials according to the weight ratio of 30% to 45% to 20% to 5%, mixing, granulating, and drying at 90 ℃ for 10 hours (the diameter is 30 mm); then presintering for 2 hours at 500 ℃, and then sintering for 2 minutes at 1200 ℃; and cooling to obtain the porous ceramsite.
Example 4
The preparation method of the porous ceramsite by adopting certain pharmaceutical sludge comprises the following specific steps:
the method is characterized in that certain pharmaceutical sludge (sludge of general biological, chemical and other pharmaceutical enterprises) (the water content of the dewatered sludge is about 80 percent after plate frame dehydration) is subjected to wet oxidation pretreatment, the wet oxidation reaction temperature is 270 ℃, the reaction time is 1.5 hours, the reaction pressure is 5MPa, and the sludge residue is obtained by solid dehydration after reaction, so that the reduction of the plate frame dewatered sludge is more than 85 percent relative to the plate frame dewatered sludge, the VSS removal rate is more than 95 percent, the water content of the solid sludge residue is lower than 40 percent, and the VS/SS is less than 5 percent. Weighing sludge residue, fly ash, building concrete powder and silicon carbide as ceramsite raw materials according to the weight ratio of 30% to 40% to 27% to 3%, mixing, granulating, and drying at 90 ℃ for 10 hours (the diameter is 40 mm); then presintering for 2 hours at 500 ℃, and then sintering for 2 minutes at 1200 ℃; and cooling to obtain the porous ceramsite.
The wet oxidation of the sludge firstly realizes that the reduction of the sludge reaches more than 85 percent, simultaneously reduces the content of organic matters in the sludge, and avoids the influence of smell in the process of preparing ceramsite by sintering; the effective utilization of waste resources such as sludge coupled fly ash and building concrete powder is realized, the solid waste discharge is reduced, the added value of the product is high, and the high-value utilization of the waste is realized.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The method for preparing the porous ceramsite by using the sludge is characterized by comprising the following steps of:
1) taking sludge subjected to pre-dehydration treatment, performing pre-treatment by adopting a wet oxidation reaction, and dehydrating to obtain solid sludge residues;
2) mixing the sludge residue obtained in the step 1), fly ash, construction waste and other additives to obtain a mixture;
3) and granulating, drying and sintering the mixture in sequence to obtain the porous ceramsite.
2. The method for preparing porous ceramsite according to claim 1, wherein in the step 1), the sludge is pre-dewatered by using a plate-and-frame filter press.
3. The method for preparing porous ceramsite by using sludge according to claim 1, wherein in the step 1), the wet oxidation reaction temperature is 260-280 ℃, the reaction time is 1-2 h, and the reaction pressure is 5-6 MPa.
4. The method for preparing porous ceramsite according to claim 1, wherein in the step 1), the mass of the sludge residue is less than 15% of the total weight of the initial sludge, and the water content is not more than 40%.
5. The method as claimed in claim 1, wherein in the step 2), the weight ratio of the sludge residue, the fly ash, the construction waste and other additives is (20-30%) (40-50%) (20-30%) (1-5%).
6. The method for preparing porous ceramsite according to claim 1, wherein in the step 2), the construction waste comprises construction concrete powder;
in step 2), the other additive comprises silicon carbide.
7. The method for preparing porous ceramsite by using sludge according to claim 1, wherein in the step 3), the diameter of a coarse ceramsite product obtained by granulation is 10-50 mm.
8. The method for preparing porous ceramsite according to claim 1, wherein in the step 3), the drying temperature is 80-110 ℃ and the drying time is 6-12 h.
9. The method for preparing porous ceramsite by using sludge according to claim 1, wherein in the step 3), the sintering process specifically comprises the following steps: presintering for 1-2 h at 500-600 ℃, then sintering for 2-5 min at 900-1200 ℃, and finally cooling to obtain the porous ceramsite.
10. A porous ceramsite produced by the method according to any one of claims 1-9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114605163A (en) * | 2022-03-01 | 2022-06-10 | 同济大学 | Ceramic particle based on sludge incineration ash and preparation method and application thereof |
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| EP1695943A2 (en) * | 2005-02-28 | 2006-08-30 | 3V MATEX S.p..A. | Method for recovering the products of wet oxidation and using it for producing ceramic material |
| CN105776794A (en) * | 2016-03-22 | 2016-07-20 | 上海环谷投资管理有限公司 | Method for catalytic wet oxidation of industrial sludge |
| CN107572743A (en) * | 2017-09-14 | 2018-01-12 | 同济大学 | A kind of method of catalytic wet air oxidation processing industrial sludge |
| CN112573901A (en) * | 2020-12-14 | 2021-03-30 | 中国科学院过程工程研究所 | Method for preparing homogeneous porous ceramsite by using sludge and homogeneous porous ceramsite |
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2021
- 2021-09-27 CN CN202111136700.XA patent/CN113896562A/en active Pending
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|---|---|---|---|---|
| EP1695943A2 (en) * | 2005-02-28 | 2006-08-30 | 3V MATEX S.p..A. | Method for recovering the products of wet oxidation and using it for producing ceramic material |
| CN105776794A (en) * | 2016-03-22 | 2016-07-20 | 上海环谷投资管理有限公司 | Method for catalytic wet oxidation of industrial sludge |
| CN107572743A (en) * | 2017-09-14 | 2018-01-12 | 同济大学 | A kind of method of catalytic wet air oxidation processing industrial sludge |
| CN112573901A (en) * | 2020-12-14 | 2021-03-30 | 中国科学院过程工程研究所 | Method for preparing homogeneous porous ceramsite by using sludge and homogeneous porous ceramsite |
Non-Patent Citations (1)
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| 周仰原等: "含有毒有害组分有机污泥的湿式氧化减量技术", 《净水技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114605163A (en) * | 2022-03-01 | 2022-06-10 | 同济大学 | Ceramic particle based on sludge incineration ash and preparation method and application thereof |
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