CN103319201A - Preparation method of foamed ceramics by using gangue - Google Patents
Preparation method of foamed ceramics by using gangue Download PDFInfo
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- CN103319201A CN103319201A CN2013102299719A CN201310229971A CN103319201A CN 103319201 A CN103319201 A CN 103319201A CN 2013102299719 A CN2013102299719 A CN 2013102299719A CN 201310229971 A CN201310229971 A CN 201310229971A CN 103319201 A CN103319201 A CN 103319201A
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- coal gangue
- gangue
- foamed ceramics
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- acrylic resin
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Abstract
The invention relates to a preparation method of foamed ceramics by using gangue and belongs to the technical field of ceramic material. Gangue is crushed and ball-milled until the slurry particle size is under 200 meshes and are then dried. Gangue after crushing and ball-milling are served as main raw materials. Spherical cross-linked acrylic resin with the size range between 5mum and 20 mum is served as a pore-forming agent. The quality ratio of gangue to cross-linked acrylic resin is 1: (0.1-1). Based on total weight percentage of raw material, 0.5-2% of polyethylene glycol 6000 is added as a dispersant; 0.5-4% of polyvinyl alcohol is then added as a binder; at last, 5-15% of water is added. Polyethylene glycol 6000, polyvinyl alcohol and water are stirred uniformly in a mixer and formed through machine press and are then are dried in a dryer until the base mass is fixed. The dried base body is put into a high-temperature furnace for reaction sintering in an air atmosphere. The resultant is insulated for 1-4 hours at the temperature of 1000-1200 DEG C. The volume density of the prepared foamed ceramics is 0.8-1.3 g/cm3 and the porosity is 40%-80%.
Description
Technical field
The present invention relates to a kind of method of utilizing coal gangue to prepare foamed ceramics, belong to technical field of ceramic material and solid waste resource recovery regenerative use technology field.
Background technology
Coal gangue be in the coal forming process with the rock of coal symbiosis, association, be the solid waste that produces in coal production and the dressing of coal by washing process, be one of industrial solid castoff of the present quantity discharged maximum of China.The random stacking of a large amount of coal gangues not only can appropriation of land, and atmosphere pollution, water and soil also can cause various geologic hazards, and the mankind's personnel safety and property safety caused great threat.The improvement of coal gangue and comprehensive utilization are placed on very consequence both at home and abroad always, and done a large amount of research, such as utilizing coal gangue to carry out landfill disposal, generate electricity, extract various aluminium materialization compounds, synthesize ceramic, being used as material of construction, refractory materials etc.Although these methods have consumed the part of coal spoil, the coal gangue utilization is few, even can have the problem of secondary pollution.Simultaneously, the coal gangue grade of China certain areas is low, and foreign matter content is high, has limited the comprehensive utilization that coal gangue prepares high value added product.
Foamed ceramics is a kind of porous material with hot properties.Foam materials has the advantages such as low density, low thermal conductance, low-dielectric loss, inferior quality loss, have simultaneously high porosity, high strength, high permeability, high-flexural strength, resistance to heat shocks, specific surface is large, hardness is high, wear resistance and high opposing environment degradable, can be widely used in support of the catalyst, liquid filter, gaseous diffuser, heat-insulating material, biological implantation body material etc.Therefore, utilize coal gangue to prepare foamed ceramics, developing new coal gangue, to utilize approach be very necessary.
Summary of the invention
Defective for prior art, the purpose of this invention is to provide a kind of method of utilizing coal gangue to prepare foamed ceramics, utilize coal gangue behind the broken ball milling as main raw material, utilize crosslinked acrylic resin as pore-forming material, add a certain amount of dispersion agent and binding agent, adopt simple equipment and manipulation flow process to prepare porous insulation material.
Of the present invention being contemplated that:
The coal gangue composition that the present invention adopts is the SiO of 40～70wt%
2, contain simultaneously the Al of 15～30wt%
2O
3, 5～30wt% carbon and organic matter.On the one hand, carbon and organic matter burn at a certain temperature, stay hole in sample interior.On the other hand, crosslinked acrylic resin decomposes in certain temperature range, stays a large amount of holes, can be used as the main source of pore in the foamed ceramics.Finally can prepare foamed ceramics.
For achieving the above object, the present invention adopts following technical scheme:
A kind of method of utilizing coal gangue to prepare foamed ceramics, the method comprises the steps:
1) with putting into ball mill after the coal gangue fragmentation with 100～300 rev/mins speed ball milling 5～25 hours, the slurry granularity is reached below 200 orders, slurry is put into baking oven, under 70～120 ℃ of temperature, dry;
2) with the coal gangue behind the broken ball milling as main raw material, the spherical crosslinked acrylic resin of 5～20um size range is as pore-forming material, the quality proportioning is coal gangue: crosslinked acrylic resin=1:0.1～1; Add in the coal gangue that adds behind the pore-forming material account for raw material total mass 0.5～2% polyethylene glycol 6000 as dispersion agent, add again the polyvinyl alcohol of raw material total mass 0.5～2% as binding agent, add at last the water that accounts for raw material gross weight 5～15%; With stirring in the adding of the powder after the weighing stirrer, it is mixed; Mechanical pressing, forming pressure is 5～20MPa, and base substrate is put into baking oven, is dried to green body quality and no longer changes under 70～120 ℃ of temperature;
3) base substrate after will drying is put into High Temperature Furnaces Heating Apparatus, carries out reaction sintering under air atmosphere, and synthesis temperature is 1000～1200 ℃, is incubated furnace cooling after 0.5～4 hour, makes foamed ceramics.
The main chemical compositions of described coal gangue is: SiO
2Be 40～70wt%, Al
2O
3Be 15～30wt%, C is 5～30wt%, K
2O+N
2O＜6wt%, CaO+MgO＜7wt%, other foreign matter content＜10wt%.
Compared with prior art, the present invention has following outstanding substantive distinguishing features and remarkable advantage:
The foamed ceramics of the inventive method preparation, through Archimedes's drainage analytical test, density is 0.8～1.3g/cm
3, void content is 40%～80%.This method raw materials cost is low, and can consume in a large number coal gangue, and preparation flow is simple simultaneously, equipment requirements is not high, the porous insulation material volume density of preparing is little, void content is high, and this material can be used for the heat-insulation and heat-preservation of Industrial Stoves, thermal engineering pipeline and buildings, also can be used for sound-proof material.
Embodiment
After now specific embodiments of the invention being described in.
Embodiment 1
A kind of method of utilizing coal gangue to prepare foamed ceramics, it comprises the steps:
1) with putting into ball mill after the coal gangue fragmentation with 250 rev/mins speed ball milling 12 hours, the slurry granularity is reached below 200 orders, slurry is put into baking oven, under 100 ℃ of temperature, dry;
2) with the coal gangue behind the broken ball milling as main raw material, the spherical crosslinked acrylic resin of 10um size is as pore-forming material, the quality proportioning is coal gangue: crosslinked acrylic resin=1:0.4.Add in the coal gangue that adds behind the pore-forming material account for raw material total mass 1% polyethylene glycol 6000 as dispersion agent, add again the polyvinyl alcohol of raw material total mass 1% as binding agent, add at last the water that accounts for raw material gross weight 10%.With stirring in the adding of the powder after the weighing stirrer, it is mixed.Mechanical pressing, forming pressure is 10MPa, and base substrate is put into baking oven, is dried to green body quality and no longer changes under 100 ℃ of temperature;
3) base substrate after will drying is put into High Temperature Furnaces Heating Apparatus, carries out reaction sintering under air atmosphere, and synthesis temperature is 1025 ℃, is incubated furnace cooling after 2 hours, makes foamed ceramics.
The foamed ceramics of present method preparation, through Archimedes's drainage analytical test, volume density is 0.8127g/cm
3, void content is 70%.
Embodiment 2～4 is similar to Example 1, adopts identical sintering temperature and reaction times, and difference is that the quality proportioning is coal gangue: crosslinked acrylic resin=1:0.1,1:0.2,1:0.3, the foamed ceramics of final preparation, and volume density is respectively 1.3 g/cm
3, 1.2 g/cm
3, 0.98g/cm
3, void content is respectively 51.02%, 52.03%, 65.19%.
Claims (2)
1. a method of utilizing coal gangue to prepare foamed ceramics is characterized in that, the method comprises the steps:
1) with putting into ball mill after the coal gangue fragmentation with 100～300 rev/mins speed ball milling 5～25 hours, the slurry granularity is reached below 200 orders, slurry is put into baking oven, under 70～120 ℃ of temperature, dry;
2) with the coal gangue behind the broken ball milling as main raw material, the spherical crosslinked acrylic resin of 5～20um size range is as pore-forming material, the quality proportioning is coal gangue: crosslinked acrylic resin=1:0.1～1; Add in the coal gangue that adds behind the pore-forming material account for raw material total mass 0.5～2% polyethylene glycol 6000 as dispersion agent, add again the polyvinyl alcohol of raw material total mass 0.5～2% as binding agent, add at last the water that accounts for raw material gross weight 5～15%; With stirring in the adding of the powder after the weighing stirrer, it is mixed; Mechanical pressing, forming pressure is 5～20MPa, and base substrate is put into baking oven, is dried to green body quality and no longer changes under 70～120 ℃ of temperature;
3) base substrate after will drying is put into High Temperature Furnaces Heating Apparatus, carries out reaction sintering under air atmosphere, and synthesis temperature is 1000～1200 ℃, is incubated furnace cooling after 0.5～4 hour, makes foamed ceramics.
2. a kind of method of utilizing coal gangue to prepare foamed ceramics according to claim 1 is characterized in that, the main chemical compositions of described coal gangue is: SiO
2Be 40～70wt%, Al
2O
3Be 15～30wt%, C is 5～30wt%, K
2O+N
2O＜6wt%, CaO+MgO＜7wt%, other foreign matter content＜10wt%.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130489A (en) * | 2015-08-19 | 2015-12-09 | 安徽建筑大学 | Method for preparing porous ceramic by utilizing gangue |
| CN106064918A (en) * | 2016-06-07 | 2016-11-02 | 姚忠义 | A kind of green building acoustic board and preparation method thereof |
| CN109896840A (en) * | 2019-04-26 | 2019-06-18 | 珠海三豫环保新材料科技有限公司 | A method of porous biological carrier is prepared using gangue |
| CN110183242A (en) * | 2019-05-28 | 2019-08-30 | 昌鑫生态科技(陕西)有限公司 | Industrial Solid Waste processes high-performance foam ceramic material production technology |
| CN112745146A (en) * | 2021-01-11 | 2021-05-04 | 上海大学 | Local defect whisker reinforced repairing method of carbon/carbon composite material coating and repairing coating |
| CN116239373A (en) * | 2023-05-10 | 2023-06-09 | 河北善初新型材料有限公司 | Silica ceramic material, foam ceramic filter, preparation method and application |
| CN116409982A (en) * | 2023-03-21 | 2023-07-11 | 昆明理工大学 | Porous foam ceramic material and preparation method thereof |
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| CN101671198A (en) * | 2009-10-27 | 2010-03-17 | 北京科技大学 | Method for synthesizing porous cordierite-mullite composite material by utilizing solid wastes |
| CN103011888A (en) * | 2012-12-21 | 2013-04-03 | 武汉理工大学 | Foamed ceramic prepared with solid waste and preparation method of foamed ceramic |
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2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101671198A (en) * | 2009-10-27 | 2010-03-17 | 北京科技大学 | Method for synthesizing porous cordierite-mullite composite material by utilizing solid wastes |
| CN103011888A (en) * | 2012-12-21 | 2013-04-03 | 武汉理工大学 | Foamed ceramic prepared with solid waste and preparation method of foamed ceramic |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130489A (en) * | 2015-08-19 | 2015-12-09 | 安徽建筑大学 | Method for preparing porous ceramic by utilizing gangue |
| CN106064918A (en) * | 2016-06-07 | 2016-11-02 | 姚忠义 | A kind of green building acoustic board and preparation method thereof |
| CN109896840A (en) * | 2019-04-26 | 2019-06-18 | 珠海三豫环保新材料科技有限公司 | A method of porous biological carrier is prepared using gangue |
| CN110183242A (en) * | 2019-05-28 | 2019-08-30 | 昌鑫生态科技(陕西)有限公司 | Industrial Solid Waste processes high-performance foam ceramic material production technology |
| CN112745146A (en) * | 2021-01-11 | 2021-05-04 | 上海大学 | Local defect whisker reinforced repairing method of carbon/carbon composite material coating and repairing coating |
| CN112745146B (en) * | 2021-01-11 | 2022-07-12 | 上海大学 | Local defect whisker or sheet reinforcing and repairing method of carbon/carbon composite material coating and repairing coating |
| CN116409982A (en) * | 2023-03-21 | 2023-07-11 | 昆明理工大学 | Porous foam ceramic material and preparation method thereof |
| CN116239373A (en) * | 2023-05-10 | 2023-06-09 | 河北善初新型材料有限公司 | Silica ceramic material, foam ceramic filter, preparation method and application |
| CN116239373B (en) * | 2023-05-10 | 2023-08-15 | 河北善初新型材料有限公司 | Silica ceramic material, foam ceramic filter, preparation method and application |
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Application publication date: 20130925 |