CN100532316C - Method for burning haydite by solid castoff - Google Patents
Method for burning haydite by solid castoff Download PDFInfo
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- CN100532316C CN100532316C CNB2008100564032A CN200810056403A CN100532316C CN 100532316 C CN100532316 C CN 100532316C CN B2008100564032 A CNB2008100564032 A CN B2008100564032A CN 200810056403 A CN200810056403 A CN 200810056403A CN 100532316 C CN100532316 C CN 100532316C
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- temperature
- coal gangue
- haydite
- ceramsite
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- 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
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- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A process for preparing baking ceramsite from solid waste belongs to the field of architectural materials. The invention bakes ceramsite products with high property by employing coal gangue, sludge and waste glass powder as raw materials. Components percentage by weight in the formula comprise the coal gangue of 15-45%, urban domestic dry sludge of 25%-50% and waste glass powder of 20%-50%. Ceramsite green-ware prepared according to the formula are heat-insulated at a temperature of 300DEG C-600DEG C for 20-50 minutes after being dried and carbon discharging is carried out, and then baked at a temperature of 950DEG C-1100DEG C for 8-20 minutes to obtain the ceramsite products, the property of which meets the Lightweight Aggregates and its Test Methods GB/T 17431.1-1998 Standards.
Description
Technical field
A kind of preparation method who utilizes coal gangue, mud and cullet powder to fire light high-strength haydite belongs to building material technical field.
Background technology
Coal gangue is the solid waste of the present quantity discharged maximum of China, and its output accounts for 15%～20% of raw coal ultimate production, and China has accumulated 5,000,000,000 tons at present, and increases fast with the speed of 1.5 hundred million tons of annual emissions.China produces the dewatered sludge amount per year and is about 500,000 tons, at present mainly based on landfill.The stacking of coal gangue and mud and landfill have not only occupied a large amount of soils, and have caused huge environmental pollution, are badly in need of harmless treatment in addition.Haydite is as a kind of material of construction, and the inorganic non-metallic matter solid waste that can mass consumption can not degrade provides effective means for handling these solid waste.
Existing coal gangue haydite needs to add binding agent (clay, polyvinyl alcohol etc.) in moulding process, general firing temperature is more than 1100 ℃.Existing sludge ceramsite also will add the natural mineral that clay etc. improves product strength, and firing temperature is all more than 1050 ℃, have in addition in the time of 1250 ℃, burn till.And in the preparation process of glass haydite,, in moulding process, need to use binding agent, properties-correcting agent and whipping agent because glass powder is poor material, poor plasticity, just can fire light ceramic.
Summary of the invention
The present invention is the development of these technology based on existing sludge ceramsite, coal gangue haydite and glass haydite manufacturing technology.The present invention with coal gangue, reclaim cullet powder and mud as main raw material, preparation coal gangue mud cullet total solids waste light high-strength haydite, the pin that reclaims cullet for coal gangue, mud receives and the manufacturing of haydite provides a new approach.
The present invention is a main raw material with coal gangue, urban life dewatered sludge and recovery cullet powder, coal gangue composition wherein is near clay, effectively increased prepared haydite product strength, the contained carbon of coal gangue both can increase calorific value, can play the effect of foaming again; Mud is except that providing haydite oxide compound composition, also play a part binding agent and properties-correcting agent, overcome the shortcoming of glass powder as the poor material poor plasticity, the burning of the organic composition in the mud in the baking ceramsite process simultaneously, on the one hand the calorific value in the mud is fully used, plays the effect of whipping agent on the other hand; Glass powder can make the firing temperature of haydite reduce then because its softening temperature is low, and having increased the bubbled gas that generates under the glass mutual-assistance firing temperature simultaneously can't overflow, and finally forms bubble and embody the lightweight characteristics in base substrate.
On the technical foundation of existing coal gangue haydite, sludge ceramsite and glass haydite, the invention provides the method that a kind of total solids waste is fired coal gangue sludge glass light high-strength haydite at a lower temperature.
A kind of total solids waste provided by the present invention is fired coal gangue sludge glass light high-strength haydite at a lower temperature, it is characterized in that: with coal gangue, mud and glass powder is main raw material, and preparation haydite admixtion is at 950 ℃～1100 ℃ baking ceramsites.The chemical ingredients mass percent scope of China's coal gangue:
| SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | Na 2O and K 2O |
| 51～ 65 | 16～ 36 | 2.28～ 16.43 | 0.42～ 2.32 | 0.44～ 2.41 | 1.45～ 3.90 |
China reclaims the chemical ingredients mass percent scope of cullet:
| SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | Na 2O and K 2O |
| 68.0～ 74.5 | 1.3～ 4.5 | 0.15～ 0.27 | 5.8～ 8.9 | 1.4～ 4.0 | 12.8～ 15.7 |
China's urban life dewatered sludge loss on ignition scope 28.86%～54.81%, municipal sludge inorganic ash content composition quality percentage range:
| SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | Na 2O and K 2O |
| 18.75～ 40.84 | 7.10～ 18.24 | 4.80～ 7.50 | 0.90～ 10.68 | 0.46～ 10.69 | 1.79～ 5.67 |
Step of the present invention is as follows:
(1) be raw material with coal gangue, municipal sewage plant's anhydrobiosis mud and recovery cullet, it is as follows that each forms mass percent: coal gangue 15%～45%, urban life dewatered sludge 25%～50%, cullet powder 20%～50%;
(2) various raw materials are joined in the premix stirrer with aforementioned proportion stir, add entry with Sprayable simultaneously, the final moisture mass percentage content is 20%～30% of above-mentioned raw materials and a moisture total mass; After stirring, mixed raw materials is sent into the tablets press granulation, particle is spherical; It is dry that raw material ball is put into baking oven, makes the raw material ball thorough drying;
(3) low temperature insulation row's charcoal stage: 300 ℃～600 ℃ are incubated 20～50 minutes; Room temperature to selected low temperature holding temperature is the speed intensification with 20 ℃/min;
Burn till holding stage: 950 ℃～1100 ℃ insulations 8～20 minutes, low temperature insulation row charcoal temperature are to the firing temperature temperature rise rate: 10 ℃/min;
The cooling annealing temperature stage: with the speed fast cooling of 20 ℃/min, 700 ℃～500 ℃ speed with 10 ℃/min are lowered the temperature more than 700 ℃, and the speed with 20 ℃/min below 500 ℃ is lowered the temperature.
The technical indicator that coal gangue mud cullet total solids waste light high-strength haydite of the present invention can reach:
Tap density≤563Kg/m
3
Cylindrical compress strength 〉=4.3MPa
Water-intake rate≤5%
Raw material ball after the coal gangue mud cullet total solids waste light high-strength haydite of the present invention moulding has good intensity, ftractures in the time of can avoiding in kiln sintering.Because coal gangue contains the mud organic substance content height of carbon, municipal sewage plant in the raw material ball, the two can effectively reduce the fuel consumption in the ceramsite sintering process.It is low that coal gangue mud cullet total solids waste haydite of the present invention has tap density, the cylindrical compress strength height, advantages such as water-intake rate is low, its performance index significantly are better than " light-weight aggregate and test method GB/T17431.1-1998 standard thereof " regulation, belong to light high-strength haydite.
Embodiment
Example 1: coal gangue, urban life dewatered sludge, cullet powder are tailed over mass percent less than 1% with 15: 35: 50 weight ratio adding grinding in ball grinder to 80 mesh sieve, add 24% water in the admixtion behind levigate mixing, pugging balling-up then.It is following dry 2 hours at 105 ℃ that raw material ball is put into baking oven, put into electric furnace then, fire with following temperature schedule: 20 ℃/min of room temperature～300 ℃ heat-up rate, 300 ℃ of insulation 50min, 15 ℃/min of 300 ℃～950 ℃ heat-up rates, 950 ℃ of insulation 20min, 950 ℃～700 ℃ fast coolings of temperature-fall period, 700 ℃～500 ℃ slowly coolings, fast cooling below 500 ℃, slow temperature-fall period rate of temperature fall: 10 ℃/min, fast cooling stage rate of temperature fall: 20 ℃/min.Can make tap density by above step is 546Kg/m
3, cylindrical compress strength is 4.3Mpa, water-intake rate is 3%, meets the ceramic product of national light-weight aggregate and test method GB/T 17431.1-1998 standard thereof.
Example 2: coal gangue, urban life dewatered sludge, cullet powder are tailed over mass percent less than 1% with 30: 50: 20 weight ratio adding grinding in ball grinder to 80 mesh sieve, add 30% water in the admixtion behind levigate mixing, pugging balling-up then.It is following dry 2 hours at 105 ℃ that raw material ball is put into baking oven, put into electric furnace then, fire with following temperature schedule: 20 ℃/min of room temperature～500 ℃ heat-up rate, 500 ℃ of insulation 30min, 15 ℃/min of 500 ℃～1100 ℃ heat-up rates, 1100 ℃ of insulation 8min, 1100 ℃～700 ℃ fast coolings of temperature-fall period, 700 ℃～500 ℃ slowly coolings, fast cooling below 500 ℃, slow temperature-fall period rate of temperature fall: 10 ℃/min, fast cooling stage rate of temperature fall: 20 ℃/min.Can make tap density by above step is 517Kg/m
3, cylindrical compress strength is 4.4MPa, water-intake rate is 5%, meets the ceramic product of national light-weight aggregate and test method GB/T 17431.1-1998 standard thereof.
Example 3: coal gangue, urban life dewatered sludge, cullet powder are tailed over mass percent less than 1% with 45: 25: 30 weight ratio adding grinding in ball grinder to 80 mesh sieve, add 20% water in the admixtion behind levigate mixing, pugging balling-up then.It is following dry 2 hours at 105 ℃ that raw material ball is put into baking oven, put into electric furnace then, fire with following temperature schedule: 20 ℃/min of room temperature～600 ℃ heat-up rate, 600 ℃ of insulation 20min, 15 ℃/min of 600 ℃～1050 ℃ heat-up rates, 1050 ℃ of insulation 15min, 1050 ℃～700 ℃ fast coolings of temperature-fall period, 700 ℃～500 ℃ slowly coolings, fast cooling below 500 ℃, slow temperature-fall period rate of temperature fall: 10 ℃/min, fast cooling stage rate of temperature fall: 20 ℃/min.Can make tap density by above step is 563Kg/m
3, cylindrical compress strength 4.7Mpa, water-intake rate 3.5% meets the ceramic product of national light-weight aggregate and test method GB/T 17431.1-1998 standard thereof.
Example 4: coal gangue, urban life dewatered sludge, cullet powder are tailed over mass percent less than 1% with 32: 64: 32 weight ratio adding grinding in ball grinder to 80 mesh sieve, add 27% water in the admixtion behind levigate mixing, pugging balling-up then.It is following dry 2 hours at 105 ℃ that raw material ball is put into baking oven, put into electric furnace then, fire with following temperature schedule: 20 ℃/min of room temperature～500 ℃ heat-up rate, 500 ℃ of insulation 30min, 15 ℃/min of 500 ℃～1100 ℃ heat-up rates, 1100 ℃ of insulation 15min, 1100 ℃～700 ℃ fast coolings of temperature-fall period, 700 ℃～500 ℃ slowly coolings, fast cooling below 500 ℃, slow temperature-fall period rate of temperature fall: 10 ℃/min, fast cooling stage rate of temperature fall: 20 ℃/min.Can make tap density 541Kg/m by above step
3, cylindrical compress strength 4.75Mpa, water-intake rate 2% meets the ceramic product of national light-weight aggregate and test method GB/T 17431.1-1998 standard thereof.
Example 5: coal gangue, urban life dewatered sludge, cullet powder are tailed over mass percent less than 1% with 19: 43: 38 weight ratio adding grinding in ball grinder to 80 mesh sieve, purpose is to make the levigate and thorough mixing of raw material, the water of adding 26% in the admixtion behind levigate mixing, pugging balling-up then.It is following dry 2 hours at 105 ℃ that raw material ball is put into baking oven, put into electric furnace then, fire with following temperature schedule: 20 ℃/min of room temperature～600 ℃ heat-up rate, 600 ℃ of insulation 40min, 15 ℃/min of 600 ℃～1000 ℃ heat-up rates, 1000 ℃ of insulation 20min, 1000 ℃～700 ℃ fast coolings of temperature-fall period, 700 ℃～500 ℃ slowly coolings, fast cooling below 500 ℃, slow temperature-fall period rate of temperature fall: 10 ℃/min, fast cooling stage rate of temperature fall: 20 ℃/min.Can make tap density 533Kg/m by above step
3, cylindrical compress strength 4.5Mpa, water-intake rate 5% meets the ceramic product of national light-weight aggregate and test method GB/T17431.1-1998 standard thereof.
Example 6: coal gangue, urban life dewatered sludge, cullet powder are tailed over mass percent less than 1% with 42: 31: 27 weight ratio adding grinding in ball grinder to 80 mesh sieve, add 28% water in the admixtion behind levigate mixing, pugging balling-up then.It is following dry 2 hours at 105 ℃ that raw material ball is put into baking oven, put into electric furnace then, fire with following temperature schedule: 20 ℃/min of room temperature～500 ℃ heat-up rate, 500 ℃ of insulation 30min, 15 ℃/min of 500 ℃～1100 ℃ heat-up rates, 1100 ℃ of insulation 15min, 1100 ℃～700 ℃ fast coolings of temperature-fall period, 700 ℃～500 ℃ slowly coolings, fast cooling below 500 ℃, slow temperature-fall period rate of temperature fall: 10 ℃/min, fast cooling stage rate of temperature fall: 20 ℃/min.Can make tap density 556Kg/m by above step
3, cylindrical compress strength 4.6Mpa, water-intake rate 4% meets the ceramic product of national light-weight aggregate and test method GB/T 17431.1-1998 standard thereof.
Claims (1)
1, a kind of preparation method of solid waste baking ceramsite is characterized in that, comprises the steps:
(1) be raw material with coal gangue, municipal sewage plant's anhydrobiosis mud and recovery cullet, it is as follows that each forms mass percent: coal gangue 15%～45%, urban life dewatered sludge 25%～50%, cullet powder 20%～50%;
(2) various raw materials are joined in the premix stirrer with aforementioned proportion stir, add entry with Sprayable simultaneously, the final moisture mass percentage content is 20%～30% of above-mentioned raw materials and a moisture total mass; After stirring, mixed raw materials is sent into the tablets press granulation; Then the haydite green compact are put into the baking oven thorough drying;
(3) low temperature insulation row's charcoal stage: 300 ℃～600 ℃ are incubated 20～50 minutes; Room temperature to selected low temperature holding temperature is the speed intensification with 20 ℃/min;
Burn till holding stage: 950 ℃～1100 ℃ insulations 8～20 minutes, low temperature insulation row charcoal temperature are to the firing temperature temperature rise rate: 10 ℃/min;
The cooling annealing temperature stage: with the speed fast cooling of 20 ℃/min, 700 ℃～500 ℃ speed with 10 ℃/min are lowered the temperature more than 700 ℃, and the speed with 20 ℃/min below 500 ℃ is lowered the temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100564032A CN100532316C (en) | 2008-01-18 | 2008-01-18 | Method for burning haydite by solid castoff |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100564032A CN100532316C (en) | 2008-01-18 | 2008-01-18 | Method for burning haydite by solid castoff |
Publications (2)
| Publication Number | Publication Date |
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| CN101215150A CN101215150A (en) | 2008-07-09 |
| CN100532316C true CN100532316C (en) | 2009-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2008100564032A Expired - Fee Related CN100532316C (en) | 2008-01-18 | 2008-01-18 | Method for burning haydite by solid castoff |
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Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830688A (en) * | 2010-04-02 | 2010-09-15 | 桑建中 | Method for comprehensively treating sludge and preparing ceramsite from same |
| CN102285771A (en) * | 2010-06-21 | 2011-12-21 | 黄兆龙 | Light-weight aggregate and manufacturing method thereof |
| CN102219417A (en) * | 2011-03-28 | 2011-10-19 | 重庆大学 | Method for producing artificial light aggregate by using sludge |
| CN102674878B (en) * | 2011-06-22 | 2014-07-02 | 北京建工华创科技发展股份有限公司 | Coal gangue pottery sand and method for preparing same |
| CN103172253B (en) * | 2013-04-17 | 2016-05-11 | 清华大学 | A kind of method of utilizing the spontaneous brewed standby froth inorganic stock of gangue cenosphere |
| CN103539426A (en) * | 2013-09-30 | 2014-01-29 | 环境保护部华南环境科学研究所 | Method of preparing ceramsite by utilizing municipal sewage plant sludge and waste glass |
| CN103723999B (en) * | 2013-12-09 | 2016-01-20 | 北京工业大学 | City water mud is utilized to prepare the method for flower ceramsite |
| CN103951458B (en) * | 2014-04-09 | 2015-10-28 | 北京工业大学 | A kind of discarded unburned foaming haydite of fired brick powder and preparation method |
| CN104974740A (en) * | 2015-06-11 | 2015-10-14 | 中国石油天然气股份有限公司 | Preparation method of low density film-coated ceramsite |
| 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 |
| CN107216126B (en) * | 2017-04-19 | 2020-08-14 | 青岛易生态环保科技有限公司 | Preparation method of ceramsite by taking municipal sludge as raw material |
| CN108975946A (en) * | 2018-09-12 | 2018-12-11 | 北京观澜科技有限公司 | A kind of porous Superlight ceramsites and its preparation method and application |
| 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 |
| CN111423245A (en) * | 2020-05-14 | 2020-07-17 | 河南省高新技术实业有限公司 | Coal gangue-papermaking sludge ceramsite, preparation method and application thereof, baking-free water permeable brick and preparation method thereof |
| CN112624790A (en) * | 2021-02-02 | 2021-04-09 | 河南郑矿机器有限公司 | Ceramsite prepared from coal gangue and preparation method thereof |
| CN113045260B (en) * | 2021-02-20 | 2022-06-07 | 江苏金海宁新型建材科技有限公司 | High-strength heat-insulation ceramsite concrete and preparation and application thereof |
| CN112960968A (en) * | 2021-03-11 | 2021-06-15 | 重庆昊磐节能科技有限公司 | High-strength lightweight aggregate prepared from gold smelting tailings and preparation method thereof |
| CN114409425B (en) * | 2022-01-26 | 2023-06-23 | 河北工业大学 | Preparation method of sludge-based porous high-water-absorption ceramsite |
| CN115108811B (en) * | 2022-06-17 | 2023-10-20 | 中国矿业大学(北京) | Gangue ingredients, permeable bricks and preparation method thereof |
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2008
- 2008-01-18 CN CNB2008100564032A patent/CN100532316C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
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| CN101215150A (en) | 2008-07-09 |
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Assignee: Taizhou Fangyuan Building Material Co., Ltd. Assignor: Beijing University of Technology Contract record no.: 2010330001012 Denomination of invention: Method for burning haydite by solid castoff Granted publication date: 20090826 License type: Exclusive License Open date: 20080709 Record date: 20100526 |
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Granted publication date: 20090826 Termination date: 20160118 |
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