CN1297508C - Method for producing ecological architectural material using sludge and gangue - Google Patents

Method for producing ecological architectural material using sludge and gangue Download PDF

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Publication number
CN1297508C
CN1297508C CNB2005100127605A CN200510012760A CN1297508C CN 1297508 C CN1297508 C CN 1297508C CN B2005100127605 A CNB2005100127605 A CN B2005100127605A CN 200510012760 A CN200510012760 A CN 200510012760A CN 1297508 C CN1297508 C CN 1297508C
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China
Prior art keywords
coal gangue
mud
compound
sludge
weight percent
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CNB2005100127605A
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Chinese (zh)
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CN1762882A (en
Inventor
李海英
孙贵石
张贵杰
张学军
周淑香
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河北理工大学
唐山市城市污水处理有限责任公司
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Priority to CNB2005100127605A priority Critical patent/CN1297508C/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/60Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The present invention relates to a method for producing an ecological architectural material by using sludge and coal gangue, which uses the coal gangue which is a solid waste and uses the sludge discharged by a sewage plant as raw materials. The present invention is characterized in that the present invention comprises the following producing procedures: the coal gangue is crushed into granules to be mixed with the sludge, the percentage of the content of the sludge by weight is from 12% to 40%, and the percentage of the content of the coal gangue by weight is from 60% to 88%; cement, water and an additive are added into a mixture of the sludge and the coal gangue to prepare a mixed material to be aged; the mixed material is placed in a forming machine and processed into a finished product by a mechanical force. The waste coal gangue and the sludge discharged by the sewage plant are mixed and processed to prepare the ecological architectural material, and thereby, the present invention has the advantages of low production cost, scientific production technology, and remarkable economic benefit. The present invention which generates no pollution in the production process conforms to the requirement of environmental protection.

Description

Utilize mud and coal gangue to produce the method for material of construction

Technical field

The present invention relates to a kind of production method of material of construction, specifically a kind of method of utilizing mud and coal gangue to produce material of construction.

Background technology:

Along with the raising and the quickening of urbanization process of people's living standard, the output of municipal effluent increases year by year, and China's year sewage treatment capacity is 113.6 * 10 at present 8m 3/ d, processing rate about 36%, to this numeral in 2010 will reach 60%, key cities reach 70%.Mud is as the byproduct of sewage disposal, its output also increases year by year, whole nation urban wastewater treatment firm produces about 1,800,000 t/ of dewatered sludge (moisture 80% mud, 9,000,000 t), estimates will produce dewatered sludge 5,400,000 t (moisture 80% mud, 2,700 ten thousand t) every year in the coming five years.Because be subjected to the influence of " the light mud of heavy water " for a long time, the mud of most of Sewage Plant is not effectively addressed and utilizes.From on July 1st, 2003 beginning, the GB18918-2002 " urban wastewater treatment firm pollutant emission standard " of State Environmental Protection Administration's issue has increased the content of mud control criterion especially, and the processing of mud and handling problems have become one of emerging environmental problem.Excess sludge that the municipal sewage plant produces in operational process handle with disposal be a comparatively stubborn problem, it handles the 25%-40% that accounts for sewage work's overall running cost with disposal costs, sometimes even up to 60%.

Because the composition of mud is very complicated, except that containing a large amount of moisture (93~99%), also contains organism, various trace elements, pathogenic micro-organism and the compositions such as parasitic ovum, heavy metal of great number of organic matters, difficult degradation.A large amount of undressed mud are stacked arbitrarily, need take a large amount of soils again simultaneously, also cause serious secondary pollution and new environmental problem.Therefore, how that output is huge, the sewage sludge harmlessness of complicated component, resource utilization have become one of problem that environment circle attractes attention.Along with the increasing and the wastewater treatment in China scale of environmental protection dynamics constantly enlarges, the sludge disposal problem becomes increasingly conspicuous.

At present both at home and abroad sludge treatment and method of disposal mainly contain: landfill, Pai Hai, agricultural compost, recovery energy, make material of construction etc.Domestic more general landfill method is meant mud is not added the direct landfill of any processing in subterranean processing mode.Because mud is a kind of mixture of complexity, many objectionable impuritiess are contained in the inside, the long-time accumulation, objectionable impurities in the mud can be impregnated in the middle of the soil at leisure, thereby soil property is caused destruction seriously, make later farm crop all be difficult to good growth, so also should forbid.Serious pollution can be caused to the Biological resources such as fish of ocean in the row sea, has destroyed the ecotope of ocean, and the row sea also is subjected to the restriction of regional condition.The sludge composting technology has had significant progress in recent years, and in Shanxi, ground such as Shanghai, Tangshan dropped into use, but the heavy metal content in this technical requirements mud will reach agricultural standards.The sludge incineration technology is at the early-stage at home, shows according to foreign experience, and the secondary pollution that this method produces is quite serious, and dioxin in the flying dust and stench can produce a very large impact environment.In addition, the U.S., Japan and other countries have also been developed mud preparing active carbon, pitch, fuel wet goods technology.

Making brick from sludge is another effective ways of sludge treatment and utilization.Tania and Bemd to the chemical ingredients of domestic sludge and clay relatively after learn the SiO in the sludge ash 2Content is far below the content in the clay, Fe in the sludge ash 2O 3, and P 2O 5Content than high by about 10% in the clay, heavy metal content is than being more clear in the clay, other content is approaching substantially, thereby the composition of product after the domestic sludge burning and clay is approaching substantially, and it generally is feasible adding a certain amount of dried domestic sludge during with brickmaking.Because of containing a large amount of organism in the dried domestic sludge, certain combustion heat value is arranged, its combustion heat value is used for brickmaking about 6700~18000kJ/kg, but save energy.

Summary of the invention

The objective of the invention is, at disadvantages such as mud landfill, Pai Hai, burning in the background technology, provide a kind of methodological science, operation is simple, and production cost is low, the free of contamination method of utilizing mud and coal gangue to produce material of construction.

Realize the foregoing invention purpose by the following technical solutions: a kind of method of utilizing mud and coal gangue to produce material of construction, it is a raw material with Coal Refuse and Sewage Plant sludge discharged, its production stage is:

A, coal gangue is broken into particle mixes with mud, the weight percent content of mud is 12%-40%, and the weight percent content of coal gangue is 60%-88%;

B, add cement, water and admixture in the mixture of mud and coal gangue and stir, make compound, the compound ageing;

C, after ageing compound is placed in the forming machine, mechanical-moulded is base substrate;

D, base substrate promptly make finished product after drying.

Owing to adopted technique scheme, the present invention makes material of construction with depleted coal gangue and Sewage Plant sludge discharged hybrid process, and production cost is low, the production technique science.Pollution-free in the production process, the composite environmental-friendly requirement.In addition, municipal sludge also is a kind of valuable available stock, and it contains abundant organic matter.The present invention is mixed and made into material of construction such as composition brick, haydite with itself and coal gangue, with its alternative existing resources consumption-type building materials, turns waste into wealth, and has realized the Sustainable development of mud, saves the energy, has remarkable economic efficiency.On the other hand, along with the sustainable implementation of China, both the central and local governments will more and more emphasize the coordinated development of man and nature, and the harmless treatment of mud and recycling just in time meet the development strategy of country, will inevitably be subjected to increasing attention of government department and support.Therefore, efficient, economic sludge treatment technology will have huge market.

Description of drawings

Accompanying drawing 1 is a process flow sheet of the present invention.

Embodiment

Below in conjunction with accompanying drawing the present invention is explained in detail.

Invention thought of the present invention be the exploitation mud utilization by way of, it is turned waste into wealth.As everyone knows, coal gangue is the great colliery of a quantity waste, contains a certain amount of carbon, and calcining back main component is the volcano adobe.Municipal sludge also is a kind of valuable available stock.It contains abundant organic matter.The remaining sludge ash composition in calcining back also is similar to clay.The present invention is raw material according to the performance of coal gangue and mud with mud and these two kinds of solid waste of coal gangue, produces material of construction according to following step:

1, coal gangue is broken into particle and mixes with mud, the weight percent content of mud is 12%-40%, and the weight percent content of coal gangue is 60%-88%;

2, add cement, water and admixture in the mixture of mud and coal gangue and stir, make compound the compound ageing;

3, after ageing compound is placed in the machinery, mechanism is shaped to base substrate;

4, base substrate is made the finished product material of construction after drying.

Accompanying drawing 1 is the schema that the present invention produces material of construction, makes material of construction-non-burning brick, vitrified brick and haydite according to the Production Flow Chart processing of Fig. 1.Specific embodiment is as follows:

Embodiment 1: the method for making burn-free bricks:

Mud directly mixes the back making burn-free bricks with calcining or self-igniting coal gangue.Concrete steps are:

1, with the dewatered sludge drying;

2, with coal gangue through carse, medium and small three sections fragmentations, to less than the 2mm granule content greater than 85%;

3, the bastard coal rock ballast after the fragmentation is put into calcining furnace, the temperature lower calcination 8-10 about 750 ℃ hour to improve its activity (natural gangue can be unburned);

4, the bastard coal rock ballast is put into hydrochloric acid or sulfuric acid acid solution and carried out acidleach 4 hours; Leach liquor after filtration, crystallization, polymerization produce polymerize aluminum chloride or polyaluminium sulfate inorganic polymer flocculant; The spoil slag that leaches mixes with dried mud.The weight percent of mud is 12%~18%, bastard coal rock ballast 82%-88%.

5, add admixtures such as water and cement, yellow soda ash in the mixture of mud and bastard coal rock ballast and stir, mixture per ton adds ordinary Portland cement 120-180kg, adds water 350-400kg, as the yellow soda ash 5-10kg of admixture.Make compound after the process secondary stirring is even, with compound ageing 2 hours;

6, after ageing, compound is put into vibrating forming machine, be processed into adobe,, manufacture non-burning brick finished product through finishing, natural curing, drying process again through the demoulding after 24 hours by mechanical vibration.

Embodiment 2: the mixed vitrified brick of mud and coal gangue.Concrete steps are:

1, with the dewatered sludge drying;

2, sieve with the 2mm reciprocating sieve after the coal gangue process fragmentation that coal mining goes out;

3, the colliery powder after will sieving mixes with dewatered sludge, and the weight percent of mud is 15%~20%, the weight percent 80%-85% of coal gangue;

4, add admixtures such as water and high-alumina cement, yellow soda ash in the mixture of mud and colliery powder and stir, mixture per ton adds high alumina cement 150kg-180kg, adds water 150kg, yellow soda ash 5kg, water reducer 3kg.After secondary stirring is even, made the compound ageing 2 hours;

5, after ageing, compound is placed in the pressure forming machine compression moulding makes adobe, 5 tons of forming pressures;

6, base substrate is put into tunnel furnace with adobe through 110 ℃ of dryings after 12 hours and is calcined, and calcining temperature is about 1000 ℃, and firing period is about 50 hours, makes vitrified brick.

Embodiment 3: mud mixes with coal gangue produces haydite.Concrete steps are:

1, with the dewatered sludge drying;

2, sieve with the 2mm reciprocating sieve after the coal gangue process fragmentation that coal mining goes out;

3, the colliery powder after will sieving mixes with dewatered sludge, and the weight percent of mud is 40%, the weight percent 60% of coal gangue;

4, add admixtures such as high alumina cement and water, yellow soda ash in the mixture of mud and colliery powder and stir, mixture per ton adds high alumina cement 150-180kg, adds water 150kg, yellow soda ash 5kg, and water reducer 3kg, secondary stirring was made the compound ageing 2 hours after evenly;

5, after ageing, compound is put into the granulating disc granulation make the haydite base substrate;

6, the haydite base substrate, puts it in the calcining machine and calcines after 12 hours through 110 ℃ of dryings, and calcining temperature is about 1200 ℃, and firing period is 8 hours, makes the finished product haydite.

Claims (4)

1, a kind of method of utilizing mud and coal gangue to produce material of construction, it is a raw material with Coal Refuse and Sewage Plant sludge discharged, it is characterized in that, its production stage is:
A, coal gangue is broken into particle mixes with mud, the weight percent content of mud is 12%-40%, and the weight percent content of coal gangue is 60%-88%;
B, add cement, water and admixture in the mixture of coal gangue and mud and stir, make compound, the compound ageing;
C, after ageing compound is placed in the forming machine, mechanical-moulded is base substrate;
D, base substrate promptly make finished product after drying.
2, the method for utilizing mud and coal gangue to produce material of construction according to claim 1, it is characterized in that, producing non-burning brick method is: with coal gangue through carse, medium and small three sections fragmentations, to less than the 2mm granule content greater than 85%, after put into calcining furnace, at 750 ℃ temperature lower calcination 8-10 hours, then with hydrochloric acid or the acidleach of sulfuric acid acid solution 4 hours; The spoil slag that leaches mixes with dewatered sludge, and blending ratio is: the weight percent content of mud is 12%~18%, and the weight percent content of coal gangue is 82%-88%; Then toward mixture Zhong Jiashui, add ordinary Portland cement and stir as the yellow soda ash of admixture, mixture per ton adds ordinary Portland cement 120-180kg, adds water 350-400kg, makes compound after stirring; After ageing, compound is placed in the vibrating forming machine, makes base substrate, base substrate is manufactured finished bricks through the demoulding, finishing, natural curing, drying process by the mechanical vibration moulding.
3, the method for utilizing mud and coal gangue to produce material of construction according to claim 1, it is characterized in that, the method of producing vitrified brick is: coal gangue is mixed with dewatered sludge through broken back, the weight percent content of mud is 15%~20%, and the weight percent content of coal gangue is 80%-85%; Add water and high-alumina cement then in the mixture, as the yellow soda ash and the water reducer of admixture, mixture per ton adds water 150kg, adds high alumina cement 150kg-180kg, yellow soda ash 5kg, water reducer 3kg stirs and makes compound; After ageing compound is placed on and is pressed into base substrate in the pressure forming machine, base substrate is put into tunnel furnace calcining 50 hours, calcining temperature is 1000 ℃, makes vitrified brick.
4, the method for utilizing mud and coal gangue to produce material of construction according to claim 1, it is characterized in that, the method of producing haydite is: coal gangue is mixed with dewatered sludge through broken back, the weight percent content of mud is 40%, the weight percent content of coal gangue is 60%, add high alumina cement and water then in the mixture of mud and coal gangue, stir as the yellow soda ash and the water reducer of admixture, mixture per ton adds high alumina cement 150kg-180kg, add water 150kg, yellow soda ash 5kg, water reducer 3kg stirs and makes compound; Compound is placed in the granulating disc granulation after ageing and makes haydite, haydite was placed in the calcining furnace calcining 8 hours, calcining temperature is 1200 ℃, makes the finished product haydite.
CNB2005100127605A 2005-08-26 2005-08-26 Method for producing ecological architectural material using sludge and gangue CN1297508C (en)

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CN1297508C true CN1297508C (en) 2007-01-31

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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101391883A (en) * 2008-11-05 2009-03-25 北京创导高科绝热材料有限公司 Method for producing light heat-insulating brick from coal mine associated resources and light heat-insulating brick thereof
CN101781069A (en) * 2010-03-25 2010-07-21 廖炳钰 Method for processing urban sewage sludge
CN101830613B (en) * 2010-06-18 2012-03-21 李玉光 Method for manufacturing autoclaved sand-lime brick or flyash brick as well as fertilizer and grease by sludge
CN101941825B (en) * 2010-09-06 2012-07-04 广东绿由环保科技股份有限公司 Environment-friendly brick produced from combustion slag of oil-bearing sludge reclaimed coal and manufacturing method thereof
CN102942297A (en) * 2012-10-28 2013-02-27 东莞市金茂污泥处置有限公司 Method for treating dried sludge by using tunnel kiln
CN103396096A (en) * 2013-07-31 2013-11-20 湖北红莲湖博悦轻质材料有限公司 Method for preparing split bricks by utilizing sludge in red lotus lake
CN104355590A (en) * 2014-10-13 2015-02-18 合肥庭索环保材料有限公司 Method for firing paving brick by municipal sludge
CN105503154A (en) * 2016-01-26 2016-04-20 重庆市合川区狮滩矸砖厂 Coal gangue bricks for bearing structure wall and production method thereof
CN106064933A (en) * 2016-07-19 2016-11-02 四川乔丰新材料科技有限公司 A kind of formula of novel peat brick
CN106866176A (en) * 2017-02-15 2017-06-20 常州大学 A kind for the treatment of technology of leather-making mud and gangue
CN109053143A (en) * 2018-09-19 2018-12-21 南京胜仁市政建设有限公司 It is a kind of to use making brick from sludge technique

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CN1436750A (en) * 2002-12-31 2003-08-20 广东唯美陶瓷有限公司 Fast baking process of environment protecting water and air permeable brick in roller kiln
CN1526676A (en) * 2003-09-23 2004-09-08 昆明理工大学 CBC composite material made of industrial slag and its production process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1436750A (en) * 2002-12-31 2003-08-20 广东唯美陶瓷有限公司 Fast baking process of environment protecting water and air permeable brick in roller kiln
CN1526676A (en) * 2003-09-23 2004-09-08 昆明理工大学 CBC composite material made of industrial slag and its production process

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LIC Patent licence contract for exploitation submitted for record

Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.6.26 TO 2014.6.25; CHANGE OF CONTRACT

Name of requester: PENGDA CONSTRUCTION GROUP CO.,LTD.

Effective date: 20090701

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Assignee: Pengda Construction Group

Assignor: Hebei Univ. of Science & Technology|Tangshan City City Sewage Treatment Co Ltd

Contract fulfillment period: 2009.6.26 to 2014.6.25 contract change

Contract record no.: 2009990000711

Denomination of invention: Method for producing ecological architectural material using sludge and gangue

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