CN104446350A - Gangue lightweight aggregate ceramsite and preparation method thereof - Google Patents
Gangue lightweight aggregate ceramsite and preparation method thereof Download PDFInfo
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- CN104446350A CN104446350A CN201410683901.5A CN201410683901A CN104446350A CN 104446350 A CN104446350 A CN 104446350A CN 201410683901 A CN201410683901 A CN 201410683901A CN 104446350 A CN104446350 A CN 104446350A
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- coal gangue
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- haydite
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Abstract
The invention relates to gangue lightweight aggregate ceramsite and a preparation method thereof and belongs to the technical field of artificial lightweight aggregate. The product is lightweight aggregate ceramsite produced by spontaneous combustion gangue. The gangue lightweight aggregate takes the spontaneous combustion coal gangue as a raw material for production, the gangue raw material is required to be broken and ground to below 0.08mm, a foaming agent is sodium bicarbonate, a cosolvent is sodium fluosilicate, a forming agent is soluble glass, uniform mixing is carried to prepare into a sphere with the particle size of 8-10mm, and the ceramsite is formed via a specific temperature schedule. The gangue lightweight aggregate is the high-strength ceramsite with no holes in the surface, has light volumetric weight, high strength, low water absorption, low heat conductivity coefficient and good heat insulation performance and can be widely applied to the fields of building engineering construction and the like.
Description
Technical field
The invention belongs to artificial lightweight aggregate building material technical field, particularly relate to a kind of industry and covil construction coal gangue light-weight aggregate haydite and preparation method thereof.
Background technology
Coal gangue is the solid waste of discharging in coal mining process and coal washing process, it is a kind of black gray expandable rock low, harder than coal with a kind of carbon content of coal seam association in coalification course, its main component silica, aluminum oxide, also containing quantity can not ferric oxide, calcium oxide, magnesium oxide, sodium oxide, potassium oxide.Along with the development of coal production, the output of China's coal gangue grows with each passing day, and a large amount of coal gangue wastes is stacked everywhere, not only takies a large amount of soils, causes severe contamination to environment, and is a kind of wasting of resources.Carry out coal gangue process and recycling, turn waste into wealth, utilize coal gangue manufacture and covil construction light-weight aggregate haydite, be not only society and reduce environmental pollution creation social benefit, certain economic benefit can also be created for enterprise.
Haydite is the general designation to artificial lightweight aggregate, and haydite has excellent performance, high as Compressive Strength, density is low, porosity is high, alkali resistant aggregate reaction excellent performance etc.Because how empty its inside is, and be evenly distributed, there is certain intensity and soundness, thus there is lightweight, the multifunctional characteristics such as freeze proof and heat insulation.Be widely used in the field such as material of construction, flame-proof thermal insulation material.
The production method that current known coal gangue gathers materials utilizes self-igniting coal gangue to do raw material to produce.The production method that self-igniting coal gangue gathers materials is taken up an area for reducing self-igniting coal gangue, reduces environmental pollution and has made very large contribution.
In self-igniting coal gangue aggregate production method, weak point is that the coal gangue pozzolanic activity that gathers materials is uncontrollable in coal gangue spontaneous combustion process, and activity is lower.Self-igniting coal gangue is mostly adopted directly to fire at present, but the most undercapacity of haydite of preparation, limit the range of application of haydite.
Summary of the invention
For the technical problem of above-mentioned existence, solve the comprehensive utilization of coal gangue, and the problem of haydite undercapacity, the invention provides a kind of coal gangue light-weight aggregate haydite and preparation method thereof, it is the light-weight aggregate haydite utilizing self-igniting coal gangue to produce, and makes a kind of high-strength ceramsite of surperficial atresia.Have unit weight comparatively light, intensity is high, and water-intake rate is low, and thermal conductivity is low, and thermal and insulating performance is good, can be widely used in the fields such as building engineering construction.
For achieving the above object, the present invention is by the following technical solutions:
A kind of coal gangue light-weight aggregate of the present invention haydite, main raw material is coal gangue, forming agent, whipping agent, fusing assistant, baking mixedly to form, and each raw-material mass fraction is as follows: coal gangue powder is 70 ~ 85 parts, and whipping agent is 5 ~ 10 parts, fusing assistant is 2 ~ 6 parts, and forming agent is 6 ~ 10 parts.
Further, described whipping agent to be purity be 99.8% sodium bicarbonate powder, volume is 5 ~ 10 parts.
Further, described fusing assistant is purity is 99% Sodium Silicofluoride powder, and granularity is 100, and volume is 2 ~ 6 parts.
Further, described forming agent is liquid soluble glass, and its modulus is 3.1 ~ 3.4, and volume is 6 ~ 10 parts.
The preparation method of a kind of coal gangue light-weight aggregate of the present invention haydite, its preparation process is:
(1) select particle size range to be 5 ~ 25mm self-igniting coal gangue, remove wherein foreign material, be crushed to below 0.08mm particle diameter;
(2) will the coal gangue powder of below 0.08mm particle diameter being crushed to, according to adding whipping agent, fusing assistant, forming agent, mixing, and make the spheroid that particle diameter is 8 ~ 10mm;
(3), after described spheroid drying being dried, put into rotary kiln and form by a firing, maturing temperature controls within the scope of 900 DEG C ~ 1000 DEG C;
(4), after in rotary kiln, whipping agent fully reacts, then kiln discharge spontaneous combustion cooling is put in storage, and keeps dry state stand-by.
Further, in described step (1), the fragmentation of coal gangue is specially: use ball mill coal gangue crushing and grinding to be become particle diameter 180 order powder.
Further, in described step (3), specifically comprise and first described spheroid is raised 200 DEG C from room temperature, constant temperature 1h; 500 DEG C are warming up to again, constant temperature 30min through 30min; Maturing temperature 900 ~ 1000 DEG C is warming up to again, roasting 2 ~ 3h from 500 DEG C; After being incubated 30min again, Slow cooling obtains coal gangue haydite goods.
Compared to existing technology, the present invention has the following advantages:
1. the present invention selects self-igniting coal gangue to be raw material, and its coal content is extremely low, and intensity is lower, general way is difficult to make full use of use, is preparing in haydite process, makes full use of this kind of raw mineral materials and Qi Nei carbonaceous component, effectively reduce the unit weight of haydite, energy efficient, reduce and pollute.
2. the light-weight aggregate Pottery product surface atresia prepared of the present invention, unit weight is comparatively light, and intensity is high, and water-intake rate is low, and thermal conductivity is low, and thermal and insulating performance is good, can be widely used in the fields such as building operation.
3. the present invention adopts Sodium Silicofluoride as fusing assistant, effectively can reduce maturing temperature, save energy.
Embodiment
Below by specific embodiment, the present invention is described in more detail.
Coal gangue light-weight aggregate haydite of the present invention, main raw material is coal gangue, forming agent selects water glass, sodium carbonate selected by whipping agent, and Sodium Silicofluoride selected by fusing assistant, and each raw material is baking mixed to be formed, each raw-material mass percent formula (mass ratio) is as follows: coal gangue is 70 ~ 85 parts, sodium bicarbonate analytical pure is 5 ~ 10 parts, and Sodium Silicofluoride is 2 ~ 6 parts, and liquid soluble glass is 6 ~ 10 parts.
Described coal gangue is existing conventional coal gangue, and its each constituent mass per-cent is: silica content is 30 ~ 60%, and alumina content is 15 ~ 40%, and iron oxide content is 2 ~ 10%, and carbon content is 20 ~ 30%.
The preparation method of coal gangue light-weight aggregate haydite of the present invention, adopts following steps:
(1) select particle size range to be 5 ~ 25mm natural gangue, remove wherein foreign material, be crushed to below 0.08mm particle diameter;
(2) will the coal gangue powder of below 0.08mm particle diameter being crushed to, according to adding whipping agent, fusing assistant, forming agent, mixing, and make the spheroid that particle diameter is 8 ~ 10mm;
(3), after described spheroid drying being dried, put into rotary kiln and form by a firing, maturing temperature controls within the scope of 900 DEG C ~ 1000 DEG C;
(4), after in rotary kiln, whipping agent fully reacts, then kiln discharge spontaneous combustion cooling is put in storage, and keeps dry state stand-by.
In described step (1), the fragmentation of coal gangue is specially: use ball mill coal gangue crushing and grinding to be become particle diameter 180 order powder.
In described step (2), the whipping agent used for purity be sodium bicarbonate (analytical pure) powder of 99.8%, volume is 5 ~ 10 parts.
In described step (2), the fusing assistant used for purity be Sodium Silicofluoride (analytical pure) powder of 99%, its granularity is 100, and volume is 2 ~ 6 parts.
In described step (2), the forming agent used is liquid soluble glass, and its modulus is 3.1 ~ 3.4, and volume is 6 ~ 10 parts.
Described step (2) is specially, and by three kinds of raw material Homogeneous phase mixing, by hand or machine glomeration particle, granular size is generally 8 ~ 10mm.
In described step (3), specifically comprise first by described spheroid from room temperature to 200 DEG C, constant temperature 1h; 500 DEG C are warming up to again, constant temperature 30min through 30min; Maturing temperature 900 ~ 1000 DEG C is warming up to again, roasting 2 ~ 3h from 500 DEG C; After being incubated 30min again, cooling obtains coal gangue haydite goods.
embodiment 1
Choose mass ratio formula as follows: coal gangue 80 parts, water glass 7 parts, Sodium Silicofluoride 6 parts, sodium bicarbonate 7 parts is as raw material, and wherein coal gangue cries out silicon oxide 45%, aluminum oxide 20%, ferric oxide 8%, carbon content 20%, other compositions 7%.
By coal gangue first by crusher in crushing to below 5mm, then use ball mill grinding, and sieve through 180 orders, get the following material of 180 order for subsequent use.Again the material chosen is mixed with Sodium Silicofluoride, liquid soluble glass, sodium bicarbonate, and make the spherical particle of 8 ~ 10mm size, then the baking oven of 100 DEG C is put into, take out after dry 30min and put into rotary kiln, be warming up to 500 DEG C at 1h, be then warming up to 950 DEG C with 4h, insulation 30min, obtain finished product after cooling, product unit weight is 630Kg/m after testing
3, grain compressive strength reaches 22MPa.
embodiment 2
Choose mass ratio formula as follows: coal gangue 78 parts, water glass 9 parts, Sodium Silicofluoride 5 parts, 8 parts, sodium carbonate is as raw material, and wherein coal gangue cries out silicon oxide 50%, aluminum oxide 15%, ferric oxide 10%, carbon content 15%, other compositions 10%.
Coal gangue first by crusher in crushing to below 5mm, then use ball mill grinding, and sieve through 180 orders, get the following material of 180 order for subsequent use.Again the material chosen is mixed with Sodium Silicofluoride, liquid soluble glass, sodium bicarbonate, and make the spherical particle of 8 ~ 10mm size, then the baking oven of 110 DEG C is put into, take out after dry 30min and put into rotary kiln, be warming up to 500 DEG C at 1h, be then warming up to 1000 DEG C with 4h, insulation 30min, obtain finished product after cooling, product unit weight is 680Kg/m after testing
3, grain compressive strength reaches 25MPa.
embodiment 3
Choose mass ratio formula as follows: coal gangue 71 parts, water glass 10 parts, Sodium Silicofluoride 9 parts, 10 parts, sodium carbonate is as raw material, and wherein coal gangue cries out silicon oxide 60%, aluminum oxide 15%, ferric oxide 5%, carbon content 15%, other compositions 5%.
By coal gangue first by crusher in crushing to below 5mm, then use ball mill grinding, and sieve through 180 orders, get the following material of 180 order for subsequent use.Again the material chosen is mixed with Sodium Silicofluoride, liquid soluble glass, sodium bicarbonate, and make the spherical particle of 8 ~ 10mm size, then the baking oven of 105 DEG C is put into, take out after dry 30min and put into rotary kiln, be warming up to 450 DEG C at 1.5h, be then warming up to 960 DEG C with 4h, insulation 30min, obtain finished product after cooling, product unit weight is 600Kg/m after testing
3, grain compressive strength reaches 23MPa.
Above-mentionedly only several specific embodiments in the present invention to be illustrated, but can not as protection scope of the present invention, every equivalence change of making according to the design spirit in the present invention or modify, all should to think and fall into protection scope of the present invention.
Claims (7)
1. a coal gangue light-weight aggregate haydite, it is characterized in that: main raw material is coal gangue, forming agent, whipping agent, fusing assistant, baking mixedly to form, each raw-material mass fraction is as follows: coal gangue powder is 70 ~ 85 parts, and whipping agent is 5 ~ 10 parts, fusing assistant is 2 ~ 6 parts, and forming agent is 6 ~ 10 parts.
2. coal gangue light-weight aggregate haydite as claimed in claim 1, is characterized in that: described whipping agent to be purity be 99.8% sodium bicarbonate powder, volume is 5 ~ 10 parts.
3. coal gangue light-weight aggregate haydite as claimed in claim 1, is characterized in that: described fusing assistant is purity is 99% Sodium Silicofluoride powder, and granularity is 100, and volume is 2 ~ 6 parts.
4. coal gangue light-weight aggregate haydite as claimed in claim 1, it is characterized in that: described forming agent is liquid soluble glass, its modulus is 3.1 ~ 3.4, and volume is 6 ~ 10 parts.
5. a preparation method for coal gangue light-weight aggregate haydite as claimed in claim 1, is characterized in that: preparation process is:
(1) select particle size range to be 5 ~ 25mm self-igniting coal gangue, remove wherein foreign material, be crushed to below 0.08mm particle diameter;
(2) will the coal gangue powder of below 0.08mm particle diameter be crushed to, and add whipping agent, fusing assistant, forming agent according to described proportioning number, mix, and make the spheroid that particle diameter is 8 ~ 10mm;
(3), after described spheroid drying being dried, put into rotary kiln and form by a firing, maturing temperature controls within the scope of 900 DEG C ~ 1000 DEG C;
(4), after in rotary kiln, whipping agent fully reacts, then kiln discharge spontaneous combustion cooling is put in storage, and keeps dry state stand-by.
6. the preparation method of coal gangue light-weight aggregate haydite as claimed in claim 5, is characterized in that: in described step (1), the fragmentation of coal gangue is specially: use ball mill coal gangue crushing and grinding to be become particle diameter 180 order powder.
7. the preparation method of coal gangue light-weight aggregate haydite as claimed in claim 5, is characterized in that: in described step (3), specifically comprise and first described spheroid is raised 200 DEG C from room temperature, constant temperature 1h; 500 DEG C are warming up to again, constant temperature 30min through 30min; Maturing temperature 900 ~ 1000 DEG C is warming up to again, roasting 2 ~ 3h from 500 DEG C; After being incubated 30min again, Slow cooling obtains coal gangue haydite goods.
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| CN201410683901.5A CN104446350A (en) | 2014-11-25 | 2014-11-25 | Gangue lightweight aggregate ceramsite and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106332789A (en) * | 2016-08-25 | 2017-01-18 | 芜湖悠派护理用品科技股份有限公司 | Coal gangue ceramsite cat litter and preparation method thereof |
| CN106904938A (en) * | 2017-01-16 | 2017-06-30 | 武汉新陶环保科技有限公司 | It is a kind of with gangue as raw material and fuel high-strength ceramic granule and preparation method thereof |
| CN109305823A (en) * | 2017-11-16 | 2019-02-05 | 中国石油化工股份有限公司 | A kind of high-strength ceramic granule prepared by catalytic cracking spent catalyst |
| CN110104975A (en) * | 2019-05-15 | 2019-08-09 | 中南大学 | A kind of technique that belt type roasting machine pelletizing method prepares gangue lightweight aggregate |
| CN110104979A (en) * | 2019-05-15 | 2019-08-09 | 中南大学 | A method of gangue lightweight aggregate is prepared using belt sintering |
| CN111333260A (en) * | 2020-03-09 | 2020-06-26 | 广州市环境保护工程设计院有限公司 | Method and system for efficiently denitrifying landfill leachate |
| CN111423198A (en) * | 2020-04-02 | 2020-07-17 | 美钢联工程技术股份有限公司 | Coal gangue ceramsite and preparation method thereof |
| CN113387605A (en) * | 2021-06-18 | 2021-09-14 | 中南大学 | Method for preparing lightweight aggregate by low-temperature self-heating sintering of multiple kinds of coal gangue |
| CN115466133A (en) * | 2022-09-19 | 2022-12-13 | 辽宁工程技术大学 | Preparation method of coal slime-spontaneous combustion coal gangue ceramsite |
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| CN1337378A (en) * | 2001-09-24 | 2002-02-27 | 杨普安 | Coal gangue haydite and its prepn process |
| CN102674878A (en) * | 2011-06-22 | 2012-09-19 | 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 |
| CN102674883A (en) * | 2012-06-11 | 2012-09-19 | 济南大学 | Foamed ceramic insulation board and preparation method thereof |
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2014
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Patent Citations (3)
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| CN1337378A (en) * | 2001-09-24 | 2002-02-27 | 杨普安 | Coal gangue haydite and its prepn process |
| CN102674878A (en) * | 2011-06-22 | 2012-09-19 | 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 |
| CN102674883A (en) * | 2012-06-11 | 2012-09-19 | 济南大学 | Foamed ceramic insulation board and preparation method thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106332789A (en) * | 2016-08-25 | 2017-01-18 | 芜湖悠派护理用品科技股份有限公司 | Coal gangue ceramsite cat litter and preparation method thereof |
| CN106904938B (en) * | 2017-01-16 | 2020-07-14 | 武汉新陶环保科技有限公司 | High-strength ceramsite taking coal gangue as raw material and fuel and preparation method thereof |
| CN106904938A (en) * | 2017-01-16 | 2017-06-30 | 武汉新陶环保科技有限公司 | It is a kind of with gangue as raw material and fuel high-strength ceramic granule and preparation method thereof |
| CN109305823A (en) * | 2017-11-16 | 2019-02-05 | 中国石油化工股份有限公司 | A kind of high-strength ceramic granule prepared by catalytic cracking spent catalyst |
| CN110104975A (en) * | 2019-05-15 | 2019-08-09 | 中南大学 | A kind of technique that belt type roasting machine pelletizing method prepares gangue lightweight aggregate |
| CN110104979A (en) * | 2019-05-15 | 2019-08-09 | 中南大学 | A method of gangue lightweight aggregate is prepared using belt sintering |
| CN110104975B (en) * | 2019-05-15 | 2021-06-08 | 中南大学 | Process for preparing coal gangue lightweight aggregate by belt type roasting machine pelletizing method |
| CN110104979B (en) * | 2019-05-15 | 2021-06-08 | 中南大学 | Method for preparing coal gangue lightweight aggregate by adopting belt sintering |
| CN111333260A (en) * | 2020-03-09 | 2020-06-26 | 广州市环境保护工程设计院有限公司 | Method and system for efficiently denitrifying landfill leachate |
| CN111423198A (en) * | 2020-04-02 | 2020-07-17 | 美钢联工程技术股份有限公司 | Coal gangue ceramsite and preparation method thereof |
| CN113387605A (en) * | 2021-06-18 | 2021-09-14 | 中南大学 | Method for preparing lightweight aggregate by low-temperature self-heating sintering of multiple kinds of coal gangue |
| CN113387605B (en) * | 2021-06-18 | 2022-07-26 | 中南大学 | Method for preparing lightweight aggregate by low-temperature self-heating sintering of multiple kinds of coal gangue |
| CN115466133A (en) * | 2022-09-19 | 2022-12-13 | 辽宁工程技术大学 | Preparation method of coal slime-spontaneous combustion coal gangue ceramsite |
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