CN102815925A - Method for preparation of ceramsites by using sludge and river sediment and harmlessness treatment and immobilization of heavy metals - Google Patents
Method for preparation of ceramsites by using sludge and river sediment and harmlessness treatment and immobilization of heavy metals Download PDFInfo
- Publication number
- CN102815925A CN102815925A CN2012102434222A CN201210243422A CN102815925A CN 102815925 A CN102815925 A CN 102815925A CN 2012102434222 A CN2012102434222 A CN 2012102434222A CN 201210243422 A CN201210243422 A CN 201210243422A CN 102815925 A CN102815925 A CN 102815925A
- Authority
- CN
- China
- Prior art keywords
- mud
- river bottom
- heavy metal
- haydite
- bottom 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.)
- Pending
Links
Images
Abstract
The invention provides a method for preparation of ceramsites by using sludge and river sediment and harmlessness treatment and immobilization of heavy metals, which relates to a preparation method for constructional ceramsites. The invention aims to overcome the problems in treatment of sewage sludge and contaminated river sediment and immobilization of heavy metals. The method provided by the invention comprises the following steps: respectively crushing sewage sludge and river sediment after natural drying; mixing the crushed sewage sludge and the crushed river sediment according to a mass ratio of 3: 1-8 to obtain a mixture; adding a silicate substance and uniformly mixing the silicate substance with the mixture; placing an obtained product in a granulator for extrusion molding so as to obtain green bodies of the ceramsites; and subjecting the green bodies to natural air drying and sintering so as to obtain the constructional ceramsites. According to the invention, the immobilization rate of heavy metals exceeds 95%; the method of preparing the lightweight ceramsites by utilizing the sludge and the river sediment is simple, industrial production can be realized by using conventional equipment, so the method has a good application prospect.
Description
Technical field
The present invention relates to preparation method of porcelain granule for building; Be specifically related to utilize sewage sludge and river bottom mud method for feedstock production haydite for building.
Background technology
China is along with the rapid growth of wastewater treatment in China amount at present, and the sludge quantity that sewage treatment process produced also increases rapidly thereupon, and by the end of the end of the year 2010, sludge yield is near 22,000,000 tons.The present situation of current wastewater treatment in China industry remains the light mud of heavy water, and the mud that present wastewater treatment in China factory is produced nearly has 80% not obtain appropriate processing.Owing to contain hazardous and noxious substances such as a large amount of organism, germ, heavy metal in the mud; It is healthy to deal with easy pollution of ecological environment and harm humans improperly; Contain the useful matter that some can be recovered utilization in the mud simultaneously; So how more scientific and effective treatment and disposal mud is a difficult problem that needs to be resolved hurrily that faces both at home and abroad at present.Traditional sludge treatment method of disposal generally comprises methods such as landfill, burning, soil utilization; But these methods all have certain limitation; In the process of handling mud, destroy ecotope, polluted air, Financial cost height easily; Might produce secondary pollution problems, therefore in practical application, all receive certain restriction.
Along with a large amount of trade effluents and the dirty water of municipal administration are drained in the river course; Cause the most of rivers of present China all to receive pollution in various degree; Through for a long time accumulation, particularly heavy metal might be a large amount of is deposited in the bed mud for the hazardous and noxious substances in the polluted river, receive polluted bed mud and can worsen water quality; Destroy the ecotope in river, therefore the improvement to the river course receives increasing concern.Thereby the processing of river bottom mud has also just become people's question of common concern with disposing.
The problem that present difficult problem of sludge treatment is exactly heavy metal contamination.Along with process of industrialization is accelerated, the discharging of increasing trade effluent causes heavy metals a large amount of in the sewage treatment process to be trapped within the mud.Therefore how to solve sewage sludge processing and river bottom mud safely and effectively and bring environmental problem; And realize solid waste second stage employ, turn waste into wealth; Realize minimizing, stabilization, the innoxious and resource utilization of mud, seek an economy, rationally, continuable sludge treatment has very important meaning efficiently.
Summary of the invention
The present invention will solve sewage sludge and contaminated river bottom mud is disposed and the difficult problem of heavy metals immobilization; The invention provides a kind of mud and river bottom mud of utilizing and prepare method with haydite, prepared haydite can be applicable to architectural or water technology in.
The problem of a key issue heavy metals immobilization of recycling sludge utilization now, a good treatment process not only requires good practicality, and it is environmentally friendly also requiring it, can not cause secondary pollution.Owing to contain the abundant required SiO of making haydite in sewage sludge and the river bottom mud
2, Al
2O
3, Fe
2O
3Deng the inorganics composition, so can utilize sewage sludge and these characteristics of river bottom mud to be used as making the raw material of haydite.
A kind of method of utilizing mud and river bottom mud to prepare haydite for building is undertaken by following step among the present invention: it is broken that sewage sludge and river bottom mud are dropped to 25% ~ 35% back through seasoning to water ratio respectively, with the sewage sludge after the fragmentation and river bottom mud by 3: the mixing of (1 ~ 8) mass ratio obtains compound, adds the silicates material again; Said silicates material consumption is 5% ~ 15% of a mixture quality; Mixing places the granulator extrusion molding then, and obtaining particle diameter is the haydite idiosome of 6 ~ 10 mm; Naturally dry; With (8 ~ 10 ℃/min) speed heats up, and is incubated 20 ~ 40 min, furnace cooling down at 1050 ~ 1150 ℃ then; Promptly obtain haydite for building.
The loose volume weight that the present invention burns till back haydite sample is 650 ~ 800 kg/m
3, apparent density is 1500 ~ 1800 kg/m
3, mud containing rate is 0.2% ~ 0.45%, and water-intake rate is 3% ~ 6%, and percentage of damage and wear rate sum are 0.75% ~ 1.4%, and cylindrical compress strength is 10 ~ 17 Mpa.
The haydite sample that the present invention prepares is because to have compactness good, and intensity is high, and the characteristics that water-intake rate is low can be used as material and are applied to building field, as can be used as wall heat insulation material, build the flooring bed course, or as the blinding layer of highway foundation.
Mud and bed mud prepare haydite in the recycling of realizing mud and bed mud with raw material in heavy metal well be solidificated in the haydite.The security that sludge ceramsite is used is guaranteed.In the process of baking ceramsite; Other composition takes place more to contact in the heavy metal that contains in mud and the bed mud and the raw material; The physicochemical change of a series of complicacies can take place, and when high temperature, possibly take place between condensation and the diffusion and the heavy metal of redox, crystallization curing, vapor phase metal of metallic cation or the processes such as chemical reaction between heavy metal element and other elements.
The present invention has investigated sintering temperature, pH, oxidisability condition to the heavy metal leaching characteristic of haydite sample and the influence of curing rule through test.Reach a conclusion as follows:
(1) sintering temperature has significant effects to the leaching of heavy metal.When temperature reached after 1100 ℃, it was very little to detect in three kinds of different-grain diameter samples heavy metal content in the leach liquor, near the minimum limit value that detects.It is stable compound crystal Cd that mainly there is form in heavy metal
2SiO
4, Cr
2O
3, CuO and PbCrO
4
When (2) the pH value was in the 1-2 scope in the leach liquor, heavy metal was responsive to leach liquor, and the leaching amount raises obviously; After the pH value was more than or equal to 3, the trend of the variation of four heavy metal species in three kinds of haydite samples also tended towards stability, and the leaching amount is very little.
(3) along with H
2O
2Concentration increases, and the leaching amount of middle heavy metal Cd, Cr, Cu and the Pb of haydite sample increases gradually, shows that oxidisability is strong more, and strong more to erosion, the solvency action of haydite surface mass, the leaching amount of heavy metal can be high more.
Description of drawings
Fig. 1 is the influence figure of sintering temperature to the heavy metal Cd leaching; Fig. 2 is the influence figure of sintering temperature to the heavy metal Cr leaching; Fig. 3 is the influence figure of sintering temperature to the heavy metal Cu leaching; Fig. 4 is the figure that influences of sintering temperature counterweight metal Pd leaching; Fig. 5 be sintering temperature when being 1000 ℃, 1100 ℃ and 1200 ℃ in the haydite heavy metal have a deformation analysis figure; Fig. 6 is the influence figure of pH to heavy metal Cd leaching in the haydite; Fig. 7 is the influence figure of pH to heavy metal Cr leaching in the haydite; Fig. 8 is the influence figure of pH to heavy metal Cu leaching in the haydite; Fig. 9 is the influence figure of pH to heavy metal Pd leaching in the haydite; Figure 10 is the influence figure of H2O2 concentration to heavy metal Cd leaching in the haydite; Figure 11 is H
2O
2Concentration is to the figure that influences of heavy metal Cr leaching in the haydite; Figure 12 is H
2O
2Concentration is to the figure that influences of heavy metal Cu leaching in the haydite; Figure 13 is H
2O
2Concentration is to the figure that influences of heavy metal Pd leaching in the haydite;
Embodiment
Embodiment one: a kind of method of utilizing mud and river bottom mud to prepare haydite for building is undertaken by following step in this embodiment: sewage sludge and river bottom mud are dropped to 25% ~ 35% back fragmentation through seasoning to water ratio respectively; With the sewage sludge after the fragmentation and river bottom mud by 3: (1 ~ 8) mass ratio mixes and obtains compound; Add the silicates material again, said silicates material consumption is 5% ~ 15% of a mixture quality, mixing; Place the granulator extrusion molding then; Obtaining particle diameter is the haydite idiosome of 6 ~ 10mm, dries naturally, heats up with 8 ~ 10 ℃/min speed; Be incubated 20 ~ 40 min, furnace cooling down at 1050 ~ 1150 ℃ then; Promptly obtain haydite for building.
Through test, the loose volume weight that burns till back haydite sample is 650 ~ 800 kg/m
3, apparent density is 1500 ~ 1800 kg/m
3, mud containing rate is 0.2% ~ 0.45%, and water-intake rate is 3% ~ 6%, and percentage of damage and wear rate sum are 0.75% ~ 1.4%, and cylindrical compress strength is 10 ~ 17 Mpa.
Adopt following verification experimental verification heavy metals immobilization effect:
Heavy metal Cr, Cd, Cu and Pb content are respectively 1000 μ g/mg, 50 μ g/mg, 500 μ g/mg and 1000 μ g/mg in mixing back mud and the bed mud raw material.Three kinds of different-grain diameters reach the haydite sample and are: complete particle; 5 mm >=D >=2 mm; 2 mm >=D.Through in the haydite to the research of heavy metals immobilization show reach a conclusion into:
(1) sintering temperature has significant effects to the leaching of heavy metal.When temperature reached after 1100 ℃, it was very little to detect in three kinds of different-grain diameter samples heavy metal content in the leach liquor, and the heavy metals immobilization rate surpasses 99%, like Fig. 1-shown in Figure 4.It is stable compound crystal Cd that mainly there is form in heavy metal
2SiO
4, Cr
2O
3, CuO and PbCrO
4, as shown in Figure 5.
When (2) the pH value was in the 1-2 scope in the leach liquor, heavy metal was responsive to leach liquor, and the leaching amount raises obviously; After the pH value was more than or equal to 3, the trend of the variation of four heavy metal species in three kinds of haydite samples also tended towards stability, and the leaching amount is very little, and the minimum curing degree of heavy metal also surpasses 98%.Like Fig. 6-shown in Figure 9.
(3) along with H
2O
2Concentration increases, and the leaching amount of middle heavy metal Cd, Cr, Cu and the Pb of haydite sample increases gradually, shows that oxidisability is strong more; Erosion, solvency action to the haydite surface mass are strong more; The leaching amount of heavy metal can be high more, and the minimum curing degree of heavy metal also surpasses 95%, like Figure 10-shown in Figure 13.
(4) through research SiO
2, Al
2O
3, Fe
2O
3, CaO and MgO this in five inorganic oxide the leaching characteristic of heavy metal in the haydite is discovered: along with the increase of SiO2 content; Cd in the haydite, Cr, Cu and Pb leaching amount all demonstrate and reduce the trend that afterwards increases earlier, reach Schwellenwert in the time of in content is the 30%-35% scope; Along with Al
2O
3The increase of content, the leaching amount of Cd, Cr, Cu and Pb reduces gradually before Al2O3 content≤16%; Along with Fe
2O
3The increase of content, the leaching amount of Cd and Cr present the trend that reduces the slow increase in back gradually, and the leaching amount of Cu and Pb presents the trend that slowly reduces; Along with the increase of CaO content in the raw material, the leaching amount of Cd and Cr appears and reduces then obviously trend of rising earlier, and the leaching amount of Cu and Pb presents the trend of increase gradually on the whole; Along with the increase of MgO content in the raw material, in the haydite sample of three kinds of different-grain diameters Cd, Cr, Cu and Pb the leaching amount appear and reduce then slightly trend of rising earlier, be that 2% o'clock leaching amount is minimum at MgO content.
Through the curing degree research to heavy metal shows that behind the process high-temperature firing, haydite has good curing degree to heavy metal to haydite, use its security to be guaranteed as building materials.
Embodiment two: what this embodiment and embodiment one were different is: said silicates material is a water glass.Other step is identical with embodiment one with parameter.
Embodiment three: what this embodiment was different with embodiment one or two is: sewage sludge after the fragmentation and the mass ratio of river bottom mud 3: (3 ~ 7).Other step is identical with embodiment one or two with parameter.
Embodiment four: what this embodiment was different with one of embodiment one to three is: said silicates material consumption is 7% ~ 10% of a mixture quality.Other step is identical with one of embodiment one to three with parameter.
Embodiment five: what this embodiment was different with one of embodiment one to four is: be incubated 30 min down at 1050 ℃.Other step is identical with one of embodiment one to four with parameter.
Embodiment six: what this embodiment was different with one of embodiment one to four is: be incubated 40min down at 1150 ℃.Other step is identical with one of embodiment one to four with parameter.
Embodiment seven: what this embodiment was different with one of embodiment one to six is: SiO in sewage sludge and the river bottom mud
2Content is at 25% ~ 45% o'clock, Al
2O
3Content is 11% ~ 19%, Fe
2O
3Content was at 3.5% ~ 7% o'clock, and CaO content is 2.25% ~ 4.5%, and MgO content is 1.2% ~ 3%.Other step is identical with one of embodiment one to six with parameter.
Embodiment eight: a kind of method of utilizing mud and river bottom mud to prepare haydite for building is undertaken by following step in this embodiment: sewage sludge and river bottom mud are dropped to 30% back fragmentation through seasoning to water ratio respectively, sewage sludge after the fragmentation and river bottom mud are obtained compound by the mixing of 1:1 mass ratio, add water glass again; Said water glass consumption is 10% of a mixture quality; Mixing places the granulator extrusion molding then, and obtaining particle diameter is the haydite idiosome of 6mm; Naturally dry; Be warming up to 1100 ℃ with 10 ℃/min speed, be incubated 30min, furnace cooling down at 1100 ℃ then; Promptly obtain haydite for building.
Through test, the loose volume weight that burns till back haydite sample is 690 ~ 780kg/m
3, apparent density is 1350 ~ 1700 kg/m
3, mud containing rate is 0.2% ~ 0.3%, and water-intake rate is 3% ~ 6%, and percentage of damage and wear rate sum are 0.75% ~ 1%, and cylindrical compress strength is 14 ~ 17Mpa.
Claims (10)
1. one kind is utilized mud and river bottom mud to prepare haydite and the innoxious immobilized method of heavy metal, it is characterized in that a kind ofly utilizing mud and river bottom mud to prepare haydite and the innoxious immobilized method of heavy metal is undertaken by following step:
It is broken that sewage sludge and river bottom mud are dropped to 25% ~ 35% back through seasoning to water ratio respectively, with the sewage sludge after the fragmentation and river bottom mud by 3: the mixing of (1 ~ 8) mass ratio obtains compound, adds the silicates material again; Said silicates material consumption is 5% ~ 15% of a mixture quality; Mixing places the granulator extrusion molding then, and obtaining particle diameter is the haydite idiosome of 6 ~ 10mm; Naturally dry; Heat up with 8 ~ 10 ℃/min speed, be incubated 20 ~ 40 min, furnace cooling down at 1050 ~ 1150 ℃ then; Promptly obtain haydite for building.
2. a kind of mud and river bottom mud of utilizing according to claim 1 prepares haydite and the innoxious immobilized method of heavy metal, it is characterized in that said silicates material is a water glass.
3. a kind of mud and river bottom mud of utilizing according to claim 1 prepares haydite and the innoxious immobilized method of heavy metal, and it is characterized in that sewage sludge and river bottom mud after the fragmentation is by 3: the mass ratio of (3 ~ 8) mixes.
4. a kind of mud and river bottom mud of utilizing according to claim 1 prepares haydite and the innoxious immobilized method of heavy metal, it is characterized in that sewage sludge and the river bottom mud after the fragmentation mixes by the mass ratio of 3:7.
5. a kind of mud and river bottom mud of utilizing according to claim 1 prepares haydite and the innoxious immobilized method of heavy metal, it is characterized in that said silicates material consumption is 7% ~ 10% of a mixture quality.
6. a kind of mud and river bottom mud of utilizing according to claim 1 prepares haydite and the innoxious immobilized method of heavy metal, it is characterized in that said silicates material consumption is 8% of a mixture quality.
7. a kind of mud and river bottom mud of utilizing according to claim 1 prepares haydite and the innoxious immobilized method of heavy metal, it is characterized in that being incubated 30 min down at 1050 ℃.
8. a kind of mud and river bottom mud of utilizing according to claim 1 prepares haydite and the innoxious immobilized method of heavy metal, it is characterized in that being incubated 40min down at 1150 ℃.
9. a kind of mud and river bottom mud of utilizing according to claim 1 prepares haydite and the innoxious immobilized method of heavy metal, it is characterized in that SiO in sewage sludge and the river bottom mud
2Content is at 25% ~ 45% o'clock, Al
2O
3Content is 11% ~ 19%, Fe
2O
3Content was at 3.5% ~ 7% o'clock, and CaO content is 2.25% ~ 4.5%, and MgO content is 1.2% ~ 3%.
10. a kind of mud and river bottom mud of utilizing according to claim 1 prepares haydite and the innoxious immobilized method of heavy metal, it is characterized in that the silicates material is a water glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102434222A CN102815925A (en) | 2012-07-13 | 2012-07-13 | Method for preparation of ceramsites by using sludge and river sediment and harmlessness treatment and immobilization of heavy metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102434222A CN102815925A (en) | 2012-07-13 | 2012-07-13 | Method for preparation of ceramsites by using sludge and river sediment and harmlessness treatment and immobilization of heavy metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102815925A true CN102815925A (en) | 2012-12-12 |
Family
ID=47300431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102434222A Pending CN102815925A (en) | 2012-07-13 | 2012-07-13 | Method for preparation of ceramsites by using sludge and river sediment and harmlessness treatment and immobilization of heavy metals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102815925A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103864404A (en) * | 2014-04-09 | 2014-06-18 | 王湘英 | Ceramsite made from quartz sand tailings and sludge and preparation method of ceramsite |
| CN104386888A (en) * | 2014-06-08 | 2015-03-04 | 何晋勇 | Immobilization processing method for composite heavy-metal-polluted bottom sediment |
| CN105413623A (en) * | 2015-11-18 | 2016-03-23 | 苏州科技学院 | Preparation method of source phosphorus adsorption material in water |
| CN109603734A (en) * | 2018-12-28 | 2019-04-12 | 博域环保技术研究院(南京)有限公司 | Phosphorus adsorbent based on river bottom mud and its application for being back to river water body processing |
| CN114621023A (en) * | 2022-04-28 | 2022-06-14 | 中交疏浚技术装备国家工程研究中心有限公司 | Method for preparing autoclaved aerated block by using phosphogypsum and dredged sediment and product |
| CN115124211A (en) * | 2022-08-30 | 2022-09-30 | 中国科学院大学 | Method for stabilizing heavy metal in sludge thermochemical treatment and safely recycling sludge |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1792956A (en) * | 2005-11-28 | 2006-06-28 | 哈尔滨工业大学 | Building material manufactured by mud as raw material and preparation method thereof |
| CN101585672A (en) * | 2009-06-19 | 2009-11-25 | 台州方远新型建材有限公司 | Biosolid-sludge mixed ceram site |
-
2012
- 2012-07-13 CN CN2012102434222A patent/CN102815925A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1792956A (en) * | 2005-11-28 | 2006-06-28 | 哈尔滨工业大学 | Building material manufactured by mud as raw material and preparation method thereof |
| CN101585672A (en) * | 2009-06-19 | 2009-11-25 | 台州方远新型建材有限公司 | Biosolid-sludge mixed ceram site |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103864404A (en) * | 2014-04-09 | 2014-06-18 | 王湘英 | Ceramsite made from quartz sand tailings and sludge and preparation method of ceramsite |
| CN103864404B (en) * | 2014-04-09 | 2015-10-07 | 王湘英 | A kind of haydite utilizing quartz sand mine tailing and mud to make and preparation method thereof |
| CN104386888A (en) * | 2014-06-08 | 2015-03-04 | 何晋勇 | Immobilization processing method for composite heavy-metal-polluted bottom sediment |
| CN105413623A (en) * | 2015-11-18 | 2016-03-23 | 苏州科技学院 | Preparation method of source phosphorus adsorption material in water |
| CN105413623B (en) * | 2015-11-18 | 2018-01-16 | 苏州科技学院 | A kind of preparation method of water body Endogenous Phosphorus sorbing material |
| CN109603734A (en) * | 2018-12-28 | 2019-04-12 | 博域环保技术研究院(南京)有限公司 | Phosphorus adsorbent based on river bottom mud and its application for being back to river water body processing |
| CN114621023A (en) * | 2022-04-28 | 2022-06-14 | 中交疏浚技术装备国家工程研究中心有限公司 | Method for preparing autoclaved aerated block by using phosphogypsum and dredged sediment and product |
| CN114621023B (en) * | 2022-04-28 | 2023-11-03 | 中交疏浚技术装备国家工程研究中心有限公司 | Method for preparing autoclaved aerated block by using phosphogypsum and dredging sediment and product |
| CN115124211A (en) * | 2022-08-30 | 2022-09-30 | 中国科学院大学 | Method for stabilizing heavy metal in sludge thermochemical treatment and safely recycling sludge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102815925A (en) | Method for preparation of ceramsites by using sludge and river sediment and harmlessness treatment and immobilization of heavy metals | |
| CN101386524B (en) | Method for preparing porcelain granule from waste paper-making sludge | |
| JP5658270B2 (en) | Manufacturing method of lightweight construction materials using sludge waste | |
| CN101717240B (en) | Method for preparing porcelain granules from tannery sludge | |
| Dai et al. | The improvement in properties and environmental safety of fired clay bricks containing hazardous waste electroplating sludge: The role of Na2SiO3 | |
| CN102070352A (en) | Method for recycling dewatered sludge, channel sediment and fly ash | |
| CN103172347A (en) | Sintered porous light-weight insulating brick produced from ceramic waste mud and manufacturing method thereof | |
| CN101580378B (en) | Architectural pottery prepared by secondary waste flyash or bottom ash and method thereof | |
| CN102826818A (en) | Preparation method for bottom mud brick | |
| CN102329147A (en) | Lightweight porcelain granule manufactured by utilizing printing and dyeing sludge and manufacturing method thereof | |
| Li et al. | Immobilization of heavy metals in ceramsite prepared using contaminated soils: Effectiveness and potential mechanisms | |
| Qi et al. | Effect of chemical constituents of oxytetracycline mycelia residue and dredged sediments on characteristics of ultra-lightweight ceramsite | |
| CN106554191A (en) | A kind of method that utilization paper mill sludge prepares haydite | |
| CN107129270A (en) | A kind of method for mixing cinder and firing ceramsite by using sludge | |
| CN104591693B (en) | The method that the mud utilizing MNT to produce makes haydite | |
| CN105732066A (en) | Re-utilizing method of sludge in municipal sewage treatment plant | |
| CN105967752B (en) | Utilize the method for municipal sludge and carbide slag preparation low pollution plate | |
| JP5319254B2 (en) | Method for firing sludge granulated product and method of using the same | |
| CN105601313A (en) | Method for preparing baking-free ecological bricks from chemical and residual sludge as well as prepared product | |
| CN107266032A (en) | The method that discarded object of printing and dyeing produces sintered brick/building block | |
| CN102757255A (en) | Method for preparing lightweight ceramisite by utilizing water supply sludge and sewage sludge | |
| CN102731063A (en) | Method for preparing ceramsite by water supply sludge and sewage sludge | |
| CN108793964A (en) | It is a kind of to prepare ancient architecture ceramics and preparation method thereof using municipal sludge | |
| CN112174640A (en) | Method for treating residual mud and residual soil | |
| CN108484081B (en) | Oily sludge baking-free brick and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121212 |