CN101575217A - Method for preparing high sulfur coal gangue sintered perforated brick - Google Patents
Method for preparing high sulfur coal gangue sintered perforated brick Download PDFInfo
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- CN101575217A CN101575217A CNA2009100119113A CN200910011911A CN101575217A CN 101575217 A CN101575217 A CN 101575217A CN A2009100119113 A CNA2009100119113 A CN A2009100119113A CN 200910011911 A CN200910011911 A CN 200910011911A CN 101575217 A CN101575217 A CN 101575217A
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- coal gangue
- high sulfur
- sulfur coal
- perforated brick
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Abstract
The invention discloses a method for preparing a high sulfur coal gangue sintered perforated brick, which relates to a method for preparing a building material. The method comprises the following steps of: (1) crushing limestone, then mixing with acetylene sludge, and stirring the mixture evenly to obtain a sulfur-fixing agent; (2) mixing high sulfur coal gangue with mining slag, then crushing the mixture, and adding the sulfur-fixing agent to obtain a brickmaking material; (3) adding water into the brickmaking material, stirring the mixture evenly, and placing the mixture for 48 to 72h under sealing conditions to obtained an aged material; (4) adding the water into the aged material, performing roller compaction and stirring on the mixture, and pressing the mixture into a green brick; and (5) placing the green brick into a drying kiln for drying, placing the dried green brick into a roasting kiln, and roasting to obtain the high sulfur coal gangue sintered perforated brick. The method can fix SO2 gas in the form of sulfate, prolong the service life of equipment, and reduce the hazard of the high sulfur coal gangue.
Description
Technical field
The present invention relates to a kind of preparation method of material of construction, particularly a kind of preparation method of high sulfur coal gangue sintered perforated brick.
Background technology
China is one of the most serious country of sulfur dioxide pollution in the world, SO in 2005
2Total emission volumn ranks first in the world up to 2,549 ten thousand tons, and the financial loss that causes is up to 5,000 hundred million yuans, in recent years still with about 5% year speed increment.Because China is to the SO of burning and exhausting
2Improvement still be in the starting stage, cause some regional acid rain pollution to be on the rise, at present China's acid rain area coverage has accounted for 40% of territory total area, therefore how to reduce SO
2Quantity discharged has become the problem that China presses for solution.
China is coal big country, and the annual coal gangue that produces surpasses 200,000,000 tons, and pile up like a mountain for coal gangue, takies a large amount of soils and have a strong impact on environment, imperative to its large recycling.Along with the quickening of Chinese Urbanization's process, the building materials demand is significantly increased, State Council will progressively ban clay-brickmaking for protecting farmland, and for being the development of raw materials building material with the coal gangue, create good condition.But for high sulfur coal gangue, owing to discharge a large amount of SO in its sintering process
2, etching apparatus, bad border around polluting makes it be difficult to obtain utilize in the recycling process.
Summary of the invention
At above problem, the invention provides a kind of preparation method of high sulfur coal gangue sintered perforated brick.
Method of the present invention is carried out according to the following steps:
1, limestone powder is broken to particle diameter below 0.125mm, with carbide slag with pulverize after Wingdale mixes, blending ratio is a carbide slag: Wingdale=1～4: 1, stir the acquisition sulphur-fixing agent then.
2, high sulfur coal gangue is mixed with mining slag, blending ratio is that 400～500kcal/kg determines by the thermal value of mixture, then the ground mixt material to particle diameter below 2mm, wherein particle diameter accounts for high sulfur coal gangue and more than 70% of mining slag gross weight in the part below the 0.3mm; Add sulphur-fixing agent, add-on is 4～10% of high sulfur coal gangue and a mining slag gross weight, obtains the brickmaking material.
3, add water and stirring in the brickmaking material, the water add-on is 8～15% of a brickmaking weight of material, stirs the back and places 48～72h under sealing condition, obtains aged material.
4, aged material is added water, roll simultaneously and stir, the water add-on is 14～16% of an aged material weight, and the plasticity index that rolls and be stirred to material is more than or equal to 7; Aged material after will adding water under the condition of 1.5～3MPa is pressed into adobe then.
5, adobe is placed in the dry kiln, dry 48～72h under 50～135 ℃ of conditions, drying is placed in the roasting kiln, speed with 100～150 ℃/h is warming up to 320～350 ℃, speed with 80～100 ℃/h is warming up to 500～550 ℃, is warming up to 700～730 ℃ with the speed of 100～150 ℃/h, is warming up to 900～950 ℃ with the speed of 80～100 ℃/h, at 900～950 ℃ of insulation 3～8h, be prepared into high sulfur coal gangue sintered perforated brick.
Above-mentioned carbide slag is for producing the waste residue that products such as acetylene gas, polyvinyl chloride, polyvinyl alcohol are discharged, and granularity accounts for 70～90% of carbide slag gross weight in the part of 10～50 μ m in the carbide slag.
Above-mentioned mining slag for the driving cash, wash one or more the mixture in cash, spontaneous combustion spoil, the shale, its main component is silicon-dioxide and aluminum oxide.The weight content of sulphur is 1.8～6% in the above-mentioned high sulfur coal gangue.
The present invention joins mining slag by mixing, and regulates the thermal value of compound, makes sintered perforated brick through pulverizing, add steps such as sulphur-fixing agent, stirring, ageing, plasticising, extrusion moulding, drying and roasting.In roasting process, the flammable carbon perfect combustion successively that high sulfur coal gangue includes, contained inorganic sulfur also reacts in each stage and sulphur-fixing agent, generate sulfate species, by optimizing eutectic temperature and sintering curve, when releasing energy, finish himself roasting and vitrescence crystallization.The sulphur-fixing agent that is adopted is by Wingdale and carbide slag is composite forms, and it is convenient to get material, cheap, and the carbide slag particle is thin, and the part of particle diameter between 10～50 μ m accounts for 70～90% of carbide slag gross weight, need not pulverize.
Industrial residue that the present invention adopts, raw material is easy to get, and production cost is low, saves a large amount of soils after the industrial applications, and is very favourable to protectorate's soil resource.The present invention can effectively solve the stacking of high sulfur coal gangue and handle problems, with SO
2Gas is fixed up with the vitriol form, and high sulfur coal gangue is effectively utilized, and can prolong the work-ing life of equipment again, alleviates the harm of high sulfur coal gangue to surrounding enviroment.Carbide slag belongs to more unmanageable trade waste in addition, mainly to stack landfill, causes secondary pollution easily in the past, and the present invention utilizes carbide slag as one of compound sulphur-fixing agent material, for its recycling opens up a new way.The prepared sintered perforated brick of the present invention, performance such as product appearance, intensity, freeze-thawing resistant, weather-proof and insulation all meets the sintered perforated brick standard.The present invention not only has huge economic benefit, and saving land, also having remarkable social benefit aspect three of the sharp useless and environment protection, meets the requirement of national industrial policies.
Embodiment
Following examples are the preferred embodiment of the present invention, and the handled coal gangue of the present invention is a sulphur content at 1.8～6% high sulfur coal gangue, and the coal gangue of other compositions also can be used method of the present invention.Other raw materials that adopt in the embodiment of the invention are select materials, are not limited to the raw material of this composition during actual the use.
The Wingdale composition that adopts in the embodiment of the invention is SiO by weight percentage
21.9～6.1%, Fe
2O
32.0～4.5%, Al
2O
32.2～5.1%, CaO 46.9～52.7%, MgO 0.2～0.3%, loss on ignition 37.9～42.7%.
The high sulfur coal gangue composition that adopts in the embodiment of the invention is SiO by weight percentage
245～65%, Al
2O
315～35%, Fe
2O
31～7%, CaO 1～2%, and S 1.8～6%, and MgO 1～3%, R
2O 1～2.5%, loss on ignition 10～17%.
The carbide slag composition that adopts in the embodiment of the invention is CaO 55.4～68.5%, Al by weight percentage
2O
32.22～3.36%, Fe
2O
30.48～3.36%, SiO
22.69～7.13%, MgO 0.2～0.3%, loss on ignition 13.7～22.48%.
The broken equipment of the milling roller that adopts in the embodiment of the invention is the wet type wheel roller.
The adobe pressing device that adopts in the embodiment of the invention is a de-airing extruder, and operating pressure is 1.5～3MPa.
The calorimetry equipment that adopts in the embodiment of the invention is the oxygen bomb calorimeter.
Embodiment 1
Wingdale all was crushed to 120 mesh sieves, particle diameter below 0.125mm, with carbide slag with pulverize after Wingdale mixes, blending ratio is a carbide slag: Wingdale=4: 1 stirs the acquisition sulphur-fixing agent then.Wherein granularity accounts for 80% of carbide slag gross weight in the part of 10～50 μ m in the carbide slag.
With high sulfur coal gangue (sulphur content 5.24%), wash cash and shale thorough mixing, weight proportion is respectively 30%, 10% and 60%, be crushed to below the 2mm then, wherein the part of particle diameter below 0.3mm accounts for high sulfur coal gangue, washes 71% of cash and shale gross weight, and the thermal value of mixture is 450kcal/kg; Add sulphur-fixing agent, add-on be sulphur-fixing agent account for high sulfur coal gangue and shale gross weight 4%, obtain the brickmaking material.
Add water and stir in the brickmaking material, the water add-on is 15% of a brickmaking weight of material, stirs to be placed in the aging bunker, places 48h under sealing condition, obtains aged material.
Add water to aged material, adopt the broken equipment of milling roller to roll and stir, the water add-on is 15% of an aged material weight, and the plasticity index that rolls and be stirred to material is 9; Aged material after will adding water under the condition of 3MPa is pressed into adobe then.
Adobe is placed in the dry kiln, dry 72h under 50～135 ℃ of conditions, drying is placed in the roasting kiln, speed with 100～150 ℃/h is warming up to 320～350 ℃, speed with 80～100 ℃/h is warming up to 500～550 ℃, is warming up to 700～730 ℃ with the speed of 100～150 ℃/h, is warming up to 900 ℃ with the speed of 80～100 ℃/h, at 900 ℃ of insulation 8h, be prepared into high sulfur coal gangue sintered perforated brick.
The high sulfur coal gangue sintered perforated brick outward appearance of preparation is an incarnadine, ultimate compression strength 23.1MPa, and folding strength 5.2KN, volumetric shrinkage 4.8%, water-intake rate 12.78%, sulfur-fixing rate are 87%.
Embodiment 2
Wingdale all was crushed to 120 mesh sieves, particle diameter below 0.125mm, with carbide slag with pulverize after Wingdale mixes, blending ratio is a carbide slag: Wingdale=1: 1 stirs the acquisition sulphur-fixing agent then.Wherein granularity accounts for 70% of carbide slag gross weight in the part of 10～50 μ m in the carbide slag.
With high sulfur coal gangue (sulphur content 5.24%), wash cash and spontaneous combustion spoil thorough mixing, weight proportion is respectively 30%, 20% and 50%, be crushed to below the 2mm then, wherein the part of particle diameter below 0.3mm accounts for high sulfur coal gangue, washes 72% of cash and spontaneous combustion spoil gross weight, and the thermal value of mixture is 500kcal/kg; Add sulphur-fixing agent, add-on be sulphur-fixing agent account for high sulfur coal gangue and shale gross weight 5%, obtain the brickmaking material.
Add water and stir in the brickmaking material, the water add-on is 8% of a brickmaking weight of material, stirs to be placed in the aging bunker, places 72h under sealing condition, obtains aged material.
Aged material is added water, adopt the broken equipment of milling roller to roll and stir, the water add-on is 15% of an aged material weight, and the plasticity index that rolls and be stirred to material is 10; Aged material after will adding water under the condition of 2.5MPa is pressed into adobe then.
Adobe is placed in the dry kiln, dry 72h under 50～135 ℃ of conditions, drying is placed in the roasting kiln, speed with 100～150 ℃/h is warming up to 320～350 ℃, speed with 80～100 ℃/h is warming up to 500～550 ℃, is warming up to 700～730 ℃ with the speed of 100～150 ℃/h, is warming up to 950 ℃ with the speed of 80～100 ℃/h, at 950 ℃ of insulation 3h, be prepared into high sulfur coal gangue sintered perforated brick.
The high sulfur coal gangue sintered perforated brick outward appearance of preparation is a garnet, ultimate compression strength 29.8MPa, and folding strength 6.3KN, volumetric shrinkage 4.61%, water-intake rate 12.97%, sulfur-fixing rate are 92%.
Embodiment 3
Wingdale all was crushed to 120 mesh sieves, particle diameter below 0.125mm, with carbide slag with pulverize after Wingdale mixes, blending ratio is a carbide slag: Wingdale=2: 1 stirs the acquisition sulphur-fixing agent then.Wherein granularity accounts for 90% of carbide slag gross weight in the part of 10～50 μ m in the carbide slag.
With high sulfur coal gangue (sulphur content 5.24%) and shale thorough mixing, weight proportion is respectively 30% and 70%, be crushed to then below the 2mm, wherein the part of particle diameter below 0.3mm accounts for 75% of high sulfur coal gangue and shale gross weight, and the thermal value of mixture is 400kcal/kg; Add sulphur-fixing agent, add-on be sulphur-fixing agent account for high sulfur coal gangue and shale gross weight 7%, obtain the brickmaking material.
Add water and stir in the brickmaking material, the water add-on is 12% of a brickmaking weight of material, stirs to be placed in the aging bunker, places 48h under sealing condition, obtains aged material.
Add water to aged material, adopt the broken equipment of milling roller to roll and stir, the water add-on is 14% of an aged material weight, and the plasticity index that rolls and be stirred to material is 8, and the aged material after will adding water under the condition of 1.5MPa is pressed into adobe then.
Adobe is placed in the dry kiln, dry 48h under 50～135 ℃ of conditions, drying is placed in the roasting kiln, speed with 100～150 ℃/h is warming up to 320～350 ℃, speed with 80～100 ℃/h is warming up to 500～550 ℃, is warming up to 700～730 ℃ with the speed of 100～150 ℃/h, is warming up to 900 ℃ with the speed of 80～100 ℃/h, at 900 ℃ of insulation 6h, be prepared into high sulfur coal gangue sintered perforated brick.
The high sulfur coal gangue sintered perforated brick outward appearance of preparation is brick-red, ultimate compression strength 28.4MPa, folding strength 5.8KN, volumetric shrinkage 4.73%, water-intake rate 13.25%, sulfur-fixing rate (gross weight of element sulphur accounts for the per-cent of the gross weight of element sulphur in the high sulfur coal gangue in the contained vitriol of product) is 93%.
Embodiment 4
Wingdale all was crushed to 120 mesh sieves, particle diameter below 0.125mm, with carbide slag with pulverize after Wingdale mixes, blending ratio is a carbide slag: Wingdale=3: 1 stirs the acquisition sulphur-fixing agent then.Wherein granularity accounts for 75% of carbide slag gross weight in the part of 10～50 μ m in the carbide slag.
With high sulfur coal gangue (sulphur content 5.24%), wash cash and driving cash thorough mixing, weight proportion is respectively 40%, 10% and 50%, be crushed to below the 2mm then, wherein the part of particle diameter below 0.3mm accounts for high sulfur coal gangue, washes 74% of cash and driving cash gross weight, and the thermal value of mixture is 500kcal/kg; Add sulphur-fixing agent, add-on be sulphur-fixing agent account for high sulfur coal gangue and shale gross weight 10%, obtain the brickmaking material.
Add water and stir in the brickmaking material, the water add-on is 10% of a brickmaking weight of material, stirs to be placed in the aging bunker, places 48h under sealing condition, obtains aged material.
Aged material is added water, adopt the broken equipment of milling roller to roll and stir, the water add-on is 16% of an aged material weight, and the plasticity index that rolls and be stirred to material is 9; Aged material after will adding water under the condition of 2MPa is pressed into adobe then.
Adobe is placed in the dry kiln, dry 72h under 50～135 ℃ of conditions, drying is placed in the roasting kiln, speed with 100～150 ℃/h is warming up to 320～350 ℃, speed with 80～100 ℃/h is warming up to 500～550 ℃, is warming up to 700～730 ℃ with the speed of 100～150 ℃/h, is warming up to 950 ℃ with the speed of 80～100 ℃/h, at 950 ℃ of insulation 4h, be prepared into high sulfur coal gangue sintered perforated brick.
The high sulfur coal gangue sintered perforated brick outward appearance of preparation is a light red, ultimate compression strength 25.2MPa, and folding strength 5.4KN, volumetric shrinkage 4.32%, water-intake rate 13.73%, sulfur-fixing rate are 91%.
Claims (5)
1, a kind of preparation method of high sulfur coal gangue sintered perforated brick, it is characterized in that carrying out according to the following steps: (1) is broken to particle diameter below 0.125mm with limestone powder, mixes with carbide slag then, and blending ratio is a carbide slag: Wingdale=1～4: 1, restir is even, obtains sulphur-fixing agent; (2) high sulfur coal gangue is mixed with mining slag, blending ratio is that 400～500kcal/kg determines by the thermal value of mixture, then the ground mixt material to particle diameter below 2mm; Add sulphur-fixing agent, add-on is 4～10% of high sulfur coal gangue and a mining slag gross weight, obtains the brickmaking material; (3) add water and stirring in the brickmaking material, add-on is 8～15% of a brickmaking weight of material, stirs the back and places 48～72h under sealing condition, obtains aged material; (4) add water to aged material, and roll and stir, the water add-on is 14～16% of an aged material weight, and the plasticity index that rolls and be stirred to material is more than or equal to 7; Aged material after will adding water under the condition of 1.5～3MPa is pressed into adobe then; (5) at last adobe is placed in the dry kiln, dry 48～72h under 50～135 ℃ of conditions, drying is placed in the roasting kiln, speed with 100～150 ℃/h is warming up to 320～350 ℃, speed with 80～100 ℃/h is warming up to 500～550 ℃, is warming up to 700～730 ℃ with the speed of 100～150 ℃/h, is warming up to 900～950 ℃ with the speed of 80～100 ℃/h, at 900～950 ℃ of insulation 3～8h, be prepared into high sulfur coal gangue sintered perforated brick.
2, the preparation method of a kind of high sulfur coal gangue sintered perforated brick according to claim 1 is characterized in that granularity accounts for 70～90% of carbide slag gross weight in the part of 10～50 μ m in the described carbide slag.
3, the preparation method of a kind of high sulfur coal gangue sintered perforated brick according to claim 1, it is characterized in that described mining slag for the driving cash, wash one or more the mixture in cash, spontaneous combustion spoil, the shale.
4, the preparation method of a kind of high sulfur coal gangue sintered perforated brick according to claim 1, the weight content that it is characterized in that sulphur in the described high sulfur coal gangue is 1.8～6%.
5, the preparation method of a kind of high sulfur coal gangue sintered perforated brick according to claim 1, it is characterized in that the ground mixt material after, particle diameter accounts for high sulfur coal gangue and more than 70% of mining slag gross weight in the part below the 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100119113A CN101575217B (en) | 2009-06-09 | 2009-06-09 | Method for preparing high sulfur coal gangue sintered perforated brick |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100119113A CN101575217B (en) | 2009-06-09 | 2009-06-09 | Method for preparing high sulfur coal gangue sintered perforated brick |
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|---|---|
| CN101575217A true CN101575217A (en) | 2009-11-11 |
| CN101575217B CN101575217B (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100119113A Expired - Fee Related CN101575217B (en) | 2009-06-09 | 2009-06-09 | Method for preparing high sulfur coal gangue sintered perforated brick |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913899A (en) * | 2010-07-30 | 2010-12-15 | 鸡西奥宇广厦建材有限公司 | Method for preparing coal gangue perforated brick by taking high-calcium graphite milltailing sand as filler |
| CN103204697A (en) * | 2013-04-12 | 2013-07-17 | 上海大学 | Method for preparing porous thermal insulation material by using coal gangues rich in silicon oxide |
| CN104291789A (en) * | 2014-09-28 | 2015-01-21 | 定远县绿苑新型建材有限公司 | Perforated brick with strong water absorption property, and preparation method thereof |
| CN109909274A (en) * | 2019-04-26 | 2019-06-21 | 珠海三豫环保新材料科技有限公司 | It is a kind of to prepare the method for mesoporous material using gangue and utilize the catalyst carrier of gangue preparation |
| CN111056817A (en) * | 2020-02-25 | 2020-04-24 | 和县明生环保材料有限责任公司 | Preparation method of environment-friendly coal gangue-based hollow brick |
| CN111495556A (en) * | 2020-04-30 | 2020-08-07 | 舒新前 | Grading and upgrading method for coal gangue building material raw material |
| CN116332667A (en) * | 2023-04-06 | 2023-06-27 | 中国科学院过程工程研究所 | Method for preparing porous material and solidifying sulfur from sulfur-containing solid waste |
-
2009
- 2009-06-09 CN CN2009100119113A patent/CN101575217B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913899A (en) * | 2010-07-30 | 2010-12-15 | 鸡西奥宇广厦建材有限公司 | Method for preparing coal gangue perforated brick by taking high-calcium graphite milltailing sand as filler |
| CN103204697A (en) * | 2013-04-12 | 2013-07-17 | 上海大学 | Method for preparing porous thermal insulation material by using coal gangues rich in silicon oxide |
| CN104291789A (en) * | 2014-09-28 | 2015-01-21 | 定远县绿苑新型建材有限公司 | Perforated brick with strong water absorption property, and preparation method thereof |
| CN104291789B (en) * | 2014-09-28 | 2016-03-02 | 定远县绿苑新型建材有限公司 | A kind of bibulous perforated brick and preparation method thereof |
| CN109909274A (en) * | 2019-04-26 | 2019-06-21 | 珠海三豫环保新材料科技有限公司 | It is a kind of to prepare the method for mesoporous material using gangue and utilize the catalyst carrier of gangue preparation |
| CN111056817A (en) * | 2020-02-25 | 2020-04-24 | 和县明生环保材料有限责任公司 | Preparation method of environment-friendly coal gangue-based hollow brick |
| CN111495556A (en) * | 2020-04-30 | 2020-08-07 | 舒新前 | Grading and upgrading method for coal gangue building material raw material |
| CN116332667A (en) * | 2023-04-06 | 2023-06-27 | 中国科学院过程工程研究所 | Method for preparing porous material and solidifying sulfur from sulfur-containing solid waste |
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| Publication number | Publication date |
|---|---|
| CN101575217B (en) | 2012-07-18 |
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