CN107188601A - A kind of method that utilization city sewage and sludge prepares light porous haydite - Google Patents
A kind of method that utilization city sewage and sludge prepares light porous haydite Download PDFInfo
- Publication number
- CN107188601A CN107188601A CN201610144582.XA CN201610144582A CN107188601A CN 107188601 A CN107188601 A CN 107188601A CN 201610144582 A CN201610144582 A CN 201610144582A CN 107188601 A CN107188601 A CN 107188601A
- Authority
- CN
- China
- Prior art keywords
- sludge
- haydite
- light porous
- sewage
- porous haydite
- 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.)
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Classifications
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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
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
-
- 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 present invention provides a kind of method that utilization city sewage and sludge prepares light porous haydite, includes following steps：1) according to following components and content feeding, percentage by weight meter：Municipal sludge accounts for 70%~80%, and colliery powder accounts for 15%~25%, and carborundum powder accounts for 1%~5%, phosphoric acid calcium powder and accounts for 2%~10%；2) each component is well mixed, then it is molded using compressing method, briquetting pressure is 5Mpa 15Mpa, after shaping in air atmosphere 100 120 DEG C of dryings 40 minutes, it is put into sintering furnace, 120 DEG C 600 DEG C slow heatings 80 minutes, then proceed to be warming up to 1060 DEG C or so coolings with 5 10 DEG C/min of speed and can obtain light porous haydite.Finished product haydite water absorption rate≤10%, bulk density scope≤500kg/m3, cylindrical compress strength >=0.4MPa.Technical indicator can reach GBT 17431.1 2010《Light-weight aggregate and its test method》Standard.It is suitable for haydite for building.The present invention can not only turn waste into wealth, and be conducive to improving environmental pollution, so that a suitable high-valued outlet is provided for the disposal and recycling of sludge, with significant economic benefit and social benefit.
Description
Technical field
The invention belongs to construction material class, there is provided a kind of method that utilization city sewage and sludge prepares light porous haydite.
Background technology
City sewage and sludge is the solid waste produced in sewage disposal process.It is dirty with the development of domestic sewage disposal cause
Water factory's total process water yield and degree for the treatment of constantly will expand and improve, and the sludge quantity of generation also increasingly increases.In sewage sludge except
Containing the nutriment such as substantial amounts of organic matter and abundant nitrogen, phosphorus, also there is heavy metal, pathogenic bacteria and parasite etc. poisonous and harmful
Composition.For normal operation and the treatment effect for preventing secondary pollution that sludge causes and ensureing sewage treatment plant, the place of sewage sludge
The position that reason handling problems are occupied in municipal sewage treatment has become increasingly conspicuous.China arranged wastewater treatment sludge in 1998
Enter《National Hazard waste register》.Therefore, how disposal municipal sludge is more effectively handled, so as not to cause secondary pollution,
Or municipal sludge is turned waste into wealth, the treatment of wastes with processes of wastes against one another, be the urgent concern of our environmentalists.At present, China is to city
The methods such as the disposal of city's sludge is only limitted to fill, burned, compost, but these methods are the drawbacks of have certain：China is most of
Area uses landfill stabilization sludge, but with the increase of sludge quantity, while urban construction is also taking rapidly available soil money
Source, makes the large area addressing of landfill yard difficult.Further, since the moisture percentage in sewage sludge that China enters landfill yard does not often reach regulation
It is required that, this brings many problems to the operation and management of landfill yard, and many landfill yards start to refuse moisture content 75%-80% dehydration
Sludge admission.And burning disposal only has a small amount of application due to high costs in part developed area.Traditional composting process
Because floor space is big, the cycle is long, fertilizer poor quality, is also easy to produce stink and is gradually eliminated, and new composting process is due to machinery
The equipment investments such as ventilation, the fermentation of high temperature oxygen consumption are higher.It is sludge treatment new in recent years using domestic sewage sludge manufacture building materials
And method of resource, it is the important channel for solving the growing sludge of yield, but there is sludge admixture ratio in existing technology
Example is low, be difficult to large-scale application the problems such as need substantial amounts of clay and shale resource.
The content of the invention
The technical problems to be solved by the invention are to propose that one kind is dirty using city for above-mentioned existing municipal sludge current situation
The method that sewage sludge prepares light porous haydite, solves and utilizes high additive city sewage and sludge, substantial amounts of coal seam mine tailing coal inferior
Spoil, using certain chemical assistant and utilizes the excellent light porous haydite of simple shaping and drying sintering method processability
Method.
The present invention solves the technical scheme that is used of above-mentioned technical problem：Light porous pottery is prepared using using city sewage and sludge
The method of grain, includes following steps：
1) according to following components and content feeding, percentage by weight meter：City sewage and sludge 70%~80%, colliery powder 15%~
25%, carborundum 1%~5%, calcium phosphate 2%~10%；
2) each component is well mixed, be then molded using compressing method, briquetting pressure is 8Mpa~12Mpa, is pressed after shaping
Slow cooling is that can obtain light porous haydite to certain condition drying and sintering again.
By such scheme, described city sewage and sludge is the dewatered sludge that sewage treatment plant treats, moisture content 75%~80%.
By such scheme, described colliery powder granularity is 400-600 mesh；Carborundum powder granularity is 400-600 mesh, purity >=95%；
Calcium phosphate Powder Particle Size is 300-500 mesh, purity >=85%.
By such scheme, described drying and sintering condition is：100~120 DEG C of dryings 40 minutes, are put into sintering furnace in air atmosphere
In, 120 DEG C~600 DEG C slowly heat up 80 minutes, then proceed to be warming up to 1060 DEG C or so slow drops with 5~10 DEG C/min of speed
Temperature.
Finished product haydite water absorption rate≤10% that this method is obtained, bulk density scope≤500kg/m3, cylindrical compress strength >=0.4MPa.
Technical principle using above-mentioned raw material and the good light ceramic of method processability is mainly as follows：
1st, the ingredient requirement on city sewage and sludge baked light-weight haydite：Either haydite raw material ball or sample is burnt till, its
Performance is largely all decided by haydite raw material ratio.The performance requirement of wherein haydite raw material ball is primarily referred to as the plasticity of raw material
It is required that, plasticity refers to the ability of the continuous modification of pug under external force.Plastic raw material is mainly clay class, highly plastic clay
Also known as mild-clay, its decentralization is big, more in loose shape, tabular or laminated, such as cohesive soil, kieselguhr, ball clay, bentonite
Deng.Sludge typically has preferable plasticity, and colliery powder is introduced in the present invention, and bulk composition is kaolin in the powder
Shale class, mainly improves the overall plasticity of ball base, it is ensured that base substrate has certain intensity.Modeling is used as using calcium phosphate in the present invention
Property raw material, and mixed as softening agent and raw material, reach softening haydite finished product, improve caking property, enhancing blank strength
Purpose.The pore-forming raw material pore-forming used in porous material, main function is the porosity for improving material, adjusts aperture size, is increased
Bigger serface, adjusts the unit weight of porous ceramics, the need for meeting construction material.Mainly there are sawdust class, wastes of crops (such as rice
Grass, tangerine bar, rice husk), coal dust, expanded perlite, expansion frog stone, boil stone, fly ash float, limestone powder, float stone
Deng, on the one hand the content of silicon in haydite finished product is added as foaming agent method preparation technology using addition carborundum in the present invention,
On the other hand the loose structure of haydite is realized by reacting foaming, reaction mechanism is：SiC+2O2→SiO2+CO2↑.By with
The selection adjustment of upper raw material, it is more complicated to have abandoned municipal sludge its chemical composition, is easily influenceed by extraneous various influence factors, so that
The chemical composition for easily causing material system is unstable, it is impossible to it is stable sintering ceramsite is provided needed for a certain amount of chemical composition SiO2 and
Al2O3, and SiO2 and Al2O3 can form molten state mineral at high temperature, this is to provide the material base of sintering ceramsite intensity.
2nd, the requirement on drying and sintering condition：Haydite finished product prepared by the raw material of different sludge doping rates has different pore-formings
Optimum temperature critical point；Haydite swelling degree raises with sintering temperature and becomes big, and peak stopping；Porosity is with temperature liter
It is high and become big, it is directly proportional to degrees of expansion；Extension temperature-time is conducive to porous ceramic grain to be molded pore-forming；Haydite finished product is sintered
Occur that hole area is distributed in journey, and aperture, the hole area of dense uniform distribution and haydite are being molded in haydite finished product
When being heated evenly property, foaming reaction carry out degree is relevant, therefore drying and sintering condition is most important.
Light porous haydite is prepared using above-mentioned raw material and method, with good techno-economic effect, specifically
Show as this invention Central Plains material system main body and use dangerous waste and bulk solid waste, integrated solid waste utilization rate can be with
Up to more than 90%, with good economic results in society；Secondly selection drying and sintering process system is simple, takes full advantage of city dirty
Heating organic component in sewage sludge and gangue, saves sintering energy consumption, and economic effects of energy-saving is obvious.
Embodiment
Embodiment 1
The present invention provides a kind of method that utilization city sewage and sludge prepares light porous haydite, weighs by weight percentage first former
Material：City dehydrated sludge 70%, colliery powder 20%, wherein carborundum 3%, calcium phosphate 7%, colliery powder granularity are 500 mesh；
Carborundum powder granularity is 500 mesh, and purity is 96%；Calcium phosphate Powder Particle Size is 300 mesh, and purity is 85%；Then each component is mixed
Uniformly, 10~20mm of particle diameter raw material ball is then made on comminutor using compressing method, briquetting pressure is 10Mpa, shaping
Dry 40 minutes, be put into sintering furnace in 100 DEG C of air atmospheres afterwards, 120 DEG C~600 DEG C slowly heat up 80 minutes, then proceed to
1060 DEG C or so slow coolings are warming up to 5 DEG C/min of speed.Gained haydite water absorption rate 8%, bulk density scope
500kg/m3, cylindrical compress strength 0.4MPa, technical indicator can reach GBTl7431.1-2010《Light-weight aggregate and its test method》's
Standard, is suitable for haydite for building.
Embodiment 2
The present invention provides a kind of method that utilization city sewage and sludge prepares light porous haydite, weighs by weight percentage first former
Material：City dehydrated sludge 80%, colliery powder 15%, wherein carborundum 1%, calcium phosphate 4%, colliery powder granularity are 600 mesh；
Carborundum powder granularity is 400 mesh, and purity is 98%；Calcium phosphate Powder Particle Size is 500 mesh, and purity is 90%；Then each component is mixed
Uniformly, 10~20mm of particle diameter raw material ball is then made on comminutor using compressing method, briquetting pressure is 12Mpa, shaping
Dry 40 minutes, be put into sintering furnace in 120 DEG C of air atmospheres afterwards, 120 DEG C~600 DEG C slowly heat up 80 minutes, then proceed to
1060 DEG C or so slow coolings are warming up to 5 DEG C/min of speed.Gained haydite water absorption rate 10%, bulk density 400kg/m3、
Cylindrical compress strength 0.5MPa.Technical indicator can reach GBTl7431.1-2010《Light-weight aggregate and its test method》Standard, be adapted to
In haydite for building.
Embodiment 3
The present invention provides a kind of method that utilization city sewage and sludge prepares light porous haydite, weighs by weight percentage first former
Material：City dehydrated sludge 75%, colliery powder 18%, wherein carborundum 2%, calcium phosphate 5%, colliery powder granularity are 400 mesh；
Carborundum powder granularity is 600 mesh, and purity is 98%；Calcium phosphate Powder Particle Size is 600 mesh, and purity is 90%；Then each component is mixed
Uniformly, 10~20mm of particle diameter raw material ball is then made on comminutor using compressing method, briquetting pressure is 8Mpa, shaping
Dry 40 minutes, be put into sintering furnace in 110 DEG C of air atmospheres afterwards, 120 DEG C~600 DEG C slowly heat up 80 minutes, then proceed to
1060 DEG C or so slow coolings are warming up to 8 DEG C/min of speed.Gained haydite water absorption rate 8%, bulk density scope
450kg/m3, cylindrical compress strength 0.6MPa.Technical indicator can reach GBTl7431.1-2010《Light-weight aggregate and its test method》's
Standard, is suitable for haydite for building.
The preferred embodiments of the present invention are these are only, are not intended to limit the invention, for those skilled in the art,
The present invention can have various modifications and variations.Within the spirit and principles of the invention, any modification for being made, equivalent substitution,
Improve etc., it should be included in the scope of the protection.
Claims (6)
1. a kind of method that utilization city sewage and sludge prepares light porous haydite, includes following steps：
1) according to following components and content feeding, percentage by weight meter：City sewage and sludge 70%~80%, colliery powder 15%~
25%, carborundum 1%~5%, calcium phosphate 2%~10%；
2) each component is well mixed, be then molded using compressing method, briquetting pressure is 8Mpa~12Mpa, by certain after shaping
Slow cooling is that can obtain light porous haydite to condition drying and sintering again.
2. the method that utilization city sewage and sludge according to claim 1 prepares light porous haydite, it is characterised in that described city
City's sewage sludge is the dewatered sludge that sewage treatment plant treats, moisture content 75%~80%.
3. the method that utilization city sewage and sludge according to claim 1 prepares light porous haydite, it is characterised in that colliery powder
Granularity is 400-600 mesh.
4. the method that utilization city sewage and sludge according to claim 1 prepares light porous haydite, it is characterised in that carborundum powder
Granularity is 400-600 mesh, purity >=95%.
5. the method that utilization city sewage and sludge according to claim 1 prepares light porous haydite, it is characterised in that phosphoric acid calcium powder
Granularity is 300-500 mesh, purity >=85%.
6. the method that utilization city sewage and sludge according to claim 1 prepares light porous haydite, it is characterised in that described is dry
Dry sintering condition is：100~120 DEG C of dryings 40 minutes, are put into sintering furnace in air atmosphere, 120 DEG C~600 DEG C slow heatings
80 minutes, then proceed to be warming up to 1060 DEG C or so slow coolings with 5~10 DEG C/min of speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610144582.XA CN107188601A (en) | 2016-03-15 | 2016-03-15 | A kind of method that utilization city sewage and sludge prepares light porous haydite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610144582.XA CN107188601A (en) | 2016-03-15 | 2016-03-15 | A kind of method that utilization city sewage and sludge prepares light porous haydite |
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| Publication Number | Publication Date |
|---|---|
| CN107188601A true CN107188601A (en) | 2017-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610144582.XA Pending CN107188601A (en) | 2016-03-15 | 2016-03-15 | A kind of method that utilization city sewage and sludge prepares light porous haydite |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110372330A (en) * | 2019-07-31 | 2019-10-25 | 淮北市菲美得环保科技有限公司 | A kind of porous magnetic haydite and its preparation method and application based on municipal sludge |
| CN110407556A (en) * | 2019-08-05 | 2019-11-05 | 淮北市菲美得环保科技有限公司 | A kind of method and its application preparing high-strength light foam ceramic tile using municipal sludge |
| CN110511040A (en) * | 2019-09-27 | 2019-11-29 | 梁凤鸣 | A kind of environment-friendly type haydite and preparation method thereof |
| CN110550936A (en) * | 2019-09-20 | 2019-12-10 | 沈阳航空航天大学 | Method for improving thickness of outer enamel layer of ceramsite by using sludge slurry |
| CN111517752A (en) * | 2020-04-28 | 2020-08-11 | 山西大学 | Sulfur-fixing ash ceramsite and preparation method thereof |
| CN111689786A (en) * | 2019-03-15 | 2020-09-22 | 中国石油化工股份有限公司 | Method for preparing ceramsite by utilizing petrochemical excess sludge |
| CN112047751A (en) * | 2020-09-11 | 2020-12-08 | 辽宁罕王绿色建材有限公司 | Method for producing foamed ceramic by using sludge, coal gangue and waste kinescope glass |
-
2016
- 2016-03-15 CN CN201610144582.XA patent/CN107188601A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111689786A (en) * | 2019-03-15 | 2020-09-22 | 中国石油化工股份有限公司 | Method for preparing ceramsite by utilizing petrochemical excess sludge |
| CN110372330A (en) * | 2019-07-31 | 2019-10-25 | 淮北市菲美得环保科技有限公司 | A kind of porous magnetic haydite and its preparation method and application based on municipal sludge |
| CN110407556A (en) * | 2019-08-05 | 2019-11-05 | 淮北市菲美得环保科技有限公司 | A kind of method and its application preparing high-strength light foam ceramic tile using municipal sludge |
| CN110550936A (en) * | 2019-09-20 | 2019-12-10 | 沈阳航空航天大学 | Method for improving thickness of outer enamel layer of ceramsite by using sludge slurry |
| CN110511040A (en) * | 2019-09-27 | 2019-11-29 | 梁凤鸣 | A kind of environment-friendly type haydite and preparation method thereof |
| CN111517752A (en) * | 2020-04-28 | 2020-08-11 | 山西大学 | Sulfur-fixing ash ceramsite and preparation method thereof |
| CN111517752B (en) * | 2020-04-28 | 2021-05-14 | 山西大学 | Sulfur-fixing ash ceramsite and preparation method thereof |
| CN112047751A (en) * | 2020-09-11 | 2020-12-08 | 辽宁罕王绿色建材有限公司 | Method for producing foamed ceramic by using sludge, coal gangue and waste kinescope glass |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170922 |
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| WD01 | Invention patent application deemed withdrawn after publication |