CN102442831B - Preparation method of high-temperature smoke filter ceramic material with high thermal shock resistance - Google Patents
Preparation method of high-temperature smoke filter ceramic material with high thermal shock resistance Download PDFInfo
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- CN102442831B CN102442831B CN 201010299359 CN201010299359A CN102442831B CN 102442831 B CN102442831 B CN 102442831B CN 201010299359 CN201010299359 CN 201010299359 CN 201010299359 A CN201010299359 A CN 201010299359A CN 102442831 B CN102442831 B CN 102442831B
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Abstract
The invention discloses a preparation method of a high-temperature smoke filter ceramic material with high thermal shock resistance, wherein the method takes beta-cordierite, potash feldspar, spodumene and kaolin as raw materials, takes mullite as additive and takes carbon powder, starch, silicon carbide powder, limestone, sawdust, coal slag and ceramic waste as hole-forming agent; the high-temperature smoke filter ceramic material with high porosity, high thermal shock resistance, high compression strength, excellent filter performance and controllable aperture can be prepared by ball grinding, molding and sintering processes. The source of the pore-forming agent is wide; the die pressing, cold isostatic pressing and casting molding can be adopted, so that the operation is convenient and the production cost is low; the filter ceramic material has controllable aperture and porosity, and excellent high temperature resistance and thermal shock resistance. The technology provided by the invention solves dust filter problem of high-temperature and wet gas well and also is applied in kinds of fields such as separation and purification, sound absorption, catalyst carrier and the like.
Description
Technical field
The present invention relates to the porous inorganic material field, specifically refer to a kind of preparation method of high-temperature smoke filter ceramic material with high thermal shock resistance.
Background technology
Along with the high speed development of China's industry, problem of environmental pollution is also more and more outstanding.Industrial smoke and the dust of a large amount of dischargings have a strong impact on the healthy of people, and have hindered the sexual development held of China's industry.China has heat power plant's hundreds of seat, Industrial Boiler and kiln hundreds of thousands of platform now according to incompletely statistics, the flue dust total amount of annual discharging is up to 100,000,000 tons, these flue dust contain a large amount of fine gritty particles and harmful chemical substance with the form discharging of high-temperature gas in the flue dust.The direct discharging of these high-temperature dusty gas not only causes serious environmental pollution, also can cause a large amount of unnecessary heat-energy losses.
Gas cleaning at high temperature is directly to carry out gas solid separation under hot conditions, realizes a technology of gas sweetening, and it can farthest utilize physics sensible heat, potential chemical heat and the kinetic force of gas and utilize most effectively useful resources in the gas.Therefore, it not only becomes the study hotspot of electric power, the energy and related industries, also is the important subject of filtering industry.At present, pressurized fluidized bed combustion combined cycle generation technology (PFBC) is advanced Energy conversion system, but the dust that produces in the system is easily brought internal combustion turbine into from burner or vapourizing furnace, thereby cause the wearing and tearing of gas turbine blades, have a strong impact on work-ing life and the working efficiency of internal combustion turbine.In addition, in industrial production, often can run into high temperature, purifying treatment and waste heat recovery many wet, many cloud of dust gas recycle problem.
Can not effectively address these problems with technology such as traditional cyclonic separation, Bed Filtration, metal filtration, electrostatic precipitations.These technology are not suitable for the filtration of high temperature, many wet, many cloud of dust gas.Therefore, the development and utilization of high-temperature smoke filter ceramic material with high thermal shock resistance has preferably prospect.
Up to the present, the patent of relevant filtering high-temperature flue gas pottery preparation has: " silicon carbide porous ceramic filter and preparation method thereof " (CN101607158A), " high temperature foam ceramic for filtration and preparation method " (CN1117951A), " a kind of preparation method of recrystallized SIC high temperature gas filter element " (CN1821180A), " basalt fibre high temperature combined high temperature filtering material " (CN100448508C), " Hot Gas Cleaning Using For Refractory Ceramics Filter Element " (CN1248766C), " Al
2O
3The preparation method of porous ceramics " (CN1257133C), " preparation method of gradient porous ceramic filter element " (CN1268584C) etc.These technology only limit to adopt injection forming, cold isostatic compaction or repeatedly spraying, can not adopt dry-pressing formed technology, be difficult to realize industrial production in enormous quantities, and maximum operation (service) temperature can only be below 900-1100 ℃, and thermal shock resistance also can only reach 1000 ℃ of degree of not splitting for-20 ℃, 10 times.That these patented technology complex process, pore-forming material require is tight, production cost is high, is not suitable for large batch of industrial production, and the ceramic for filtration aperture of preparation, porosity are difficult to control, and high temperature resistant and thermal shock resistance remains further to be improved.
Summary of the invention
Purpose of the present invention overcomes the deficiencies in the prior art exactly, provides that a kind of production process is simple, pore-forming material is applied widely, production cost is low, aperture and porosity are controlled, be applicable to the high-temperature smoke filter ceramic material with high thermal shock resistance that industrialization in enormous quantities is produced.β-trichroite makes it be applicable to the Working environment of high temperature, high pressure, high corrosion owing to have that covalent structure is stable, resistance to elevated temperatures is strong and the various advantages energy such as thermal expansivity is low.And mullite has stronger thermal shock resistance.Therefore, take β-trichroite as main raw material, take mullite as additive, on the basis that increases the powder flowability, by the preparation of dry-pressing formed realization high-temperature smoke filter ceramic material with high thermal shock resistance.
Purpose of the present invention is achieved through the following technical solutions:
A kind of preparation method of high-temperature smoke filter ceramic material with high thermal shock resistance comprises the steps:
(1) take by weighing raw material by prescription, ball milling 0.5 ~ 24 hour is crossed 80 mesh sieves;
(2 moulding get ceramic body;
(3) ceramic body slowly is heated to 200 ℃, 1100 ~ 1500 ℃ of insulations 5 minutes ~ 6 hours, namely gets ceramic for filtration;
The prescription of described raw material is as follows in parts by weight:
20 ~ 100 parts of β-trichroites
0.1 ~ 50 part of potassium felspar sand
0.1 ~ 50 part of triphane
0.1 ~ 50 part of kaolin
0.1 ~ 50 part of mullite
1 ~ 100 part of pore-forming material
0.1 ~ 5 part of tripoly phosphate sodium STPP
60 ~ 130 parts in water.
Described pore-forming material is one or more the mixture in carbon dust, starch, carborundum powder, Wingdale, wood chip, cinder or the ceramic waste material.
It is described that slowly to be heated to 200 ℃ be that heat-up rate with 1 ~ 2 ℃/min is warmed up to 200 ℃.
Described ball milling is wet ball grinding.
Described dry-pressing formed, cold isostatic compaction or the injection forming of being shaped to.
Described dry-pressing formed pressure is 0.1 ~ 300MPa; The pressure of described cold isostatic compaction is 0.1 ~ 300MPa.Before the described dry-pressing formed and cold isostatic compaction ceramic slurry that obtains is carried out mist projection granulating and make ceramic particle.
The present invention compared with prior art has following advantage and excellent effect:
1, the present invention can adopt dry-pressing formedly, is applicable to large batch of industrial production.
2, technique of the present invention is simple, and is easy to operate, and processing parameter is easy to control.Selected pore-forming material source is wide, can use ceramic waste material.Cost of material is cheap, and firing temperature is low, and is with short production cycle, and production cost only has about 1/2 of conventional art, is easy to Industry Promotion.
3, the ceramic for filtration apparent porosity that makes of the present invention is up to 70%, and pore size and apparent porosity are easy to control.
4, the ceramic for filtration maximum operation (service) temperature that makes of the present invention can reach 1300 ℃, and air penetrability is high, good filtration effect.
5, the ceramic for filtration ultimate compression strength that makes of the present invention is high, and thermal expansivity is low, and heat-shock resistance is strong.
6, the ceramic for filtration that makes of the present invention after repeatedly using, can be processed by simple back blowing process and reuse.
Description of drawings
Fig. 1 is the ceramic for filtration SEM figure of the preparation take carbon dust as pore-forming material;
Fig. 2 is the ceramic for filtration SEM figure of the preparation take wood chip as pore-forming material.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail:
(1) by weight, dropped in the ball grinder pulverizing 100 parts of β-cordierite powder of 200 mesh sieves, 50 parts of potassium felspar sands, 20 parts of triphanes, 10 parts of kaolin, 0.1 part of mullite, 100 parts of waste ceramic tile polishing materials and 5 parts of tripoly phosphate sodium STPPs and 130 parts of water, ball milling 24 hours is crossed 80 mesh sieves;
(2) resulting slurry is adopted injection forming, inject the gypsum mold moulding and prepare required ceramic body;
(3) ceramic body that makes is warmed up to 200 ℃ with the heat-up rate of 1 ℃/min, burns till at 1100 ℃, be incubated 6 hours.
Prepared ceramic for filtration apparent porosity is 70.2%, and ultimate compression strength is 12.5MPa, is not split for 12 times at the heat-shock resistance of room temperature to 1050 ℃, and Gas permeability is 215.4m
3Cm/m
2HourmmH
2O.
Embodiment 2
(1) by weight, dropped in the ball grinder pulverizing 100 parts of β-cordierite powder of 200 mesh sieves, 0.1 part of potassium felspar sand, 50 parts of triphanes, 10 parts of kaolin, 50 parts of mullites, 90 parts of carbon dusts and 0.1 part of tripoly phosphate sodium STPP and 120 parts of water, ball milling 0.5 hour is crossed 80 mesh sieves;
(2) ceramic slurry that obtains is carried out mist projection granulating and make ceramic particle, dry-pressing formed under 150MPa pressure, prepare required ceramic body;
(3) ceramic body that makes is warmed up to 200 ℃ with the heat-up rate of 1.5 ℃/min, under 1250 ℃ of conditions, burns till, be incubated 4 hours.
Prepared high-temperature smoke filter ceramic material with high thermal shock resistance apparent porosity is 65.3%, and ultimate compression strength is 16.8MPa, is not split for 12 times at the heat-shock resistance of room temperature to 1200 ℃, and Gas permeability is 175.4m
3Cm/m
2HourmmH
2O.The SEM of gained ceramic for filtration schemes as shown in Figure 1, and the pottery after burning till as can be seen from Figure 1 has loose porous structure, and pore size mainly concentrates on 100-200um.
Embodiment 3
(1) by weight, dropped in the ball grinder pulverizing 80 parts of β-cordierite powder of 200 mesh sieves, 20 parts of potassium felspar sands, 0.1 part of triphane, 50 parts of kaolin, 25 parts of mullites, 1 part of silicon carbide powder and 0.1 part of tripoly phosphate sodium STPP and 60 parts of water, ball milling 18 hours is crossed 80 mesh sieves;
(2) ceramic slurry that obtains is carried out mist projection granulating and make ceramic particle, cold isostatic compaction under 300MPa pressure is prepared required ceramic body;
(3) ceramic body that makes is warmed up to 200 ℃ with the heat-up rate of 1 ℃/min, under 1500 ℃ of conditions, burns till, be incubated 5 minutes.
Prepared filtering high-temperature flue gas pottery apparent porosity is 49.1%, and ultimate compression strength is 27.6MPa, is not split for 13 times at the heat-shock resistance of room temperature to 1300 ℃, and Gas permeability is 135.5m
3Cm/m
2HourmmH
2O.
Embodiment 4
(1) by weight, dropped in the ball grinder pulverizing 60 parts of β-cordierite powder of 200 mesh sieves, 20 parts of potassium felspar sands, 20 parts of triphanes, 0.1 part of kaolin, 2 parts of mullites, 45 parts of wood chips and 1.2 parts of tripoly phosphate sodium STPPs and 110 parts of water, ball milling 12 hours is crossed 80 mesh sieves;
(2) ceramic slurry that obtains is carried out mist projection granulating and make ceramic particle, cold isostatic compaction under 0.1MPa pressure is prepared required ceramic body;
(3) ceramic body that makes is warmed up to 200 ℃ with the heat-up rate of 2 ℃/min, under 1350 ℃ of conditions, burns till, be incubated 3 hours.
Prepared filtering high-temperature flue gas pottery apparent porosity is 67.3%, and ultimate compression strength is 18.6MPa, is not split for 9 times at the heat-shock resistance of room temperature to 1300 ℃, and Gas permeability is 198.8m
3Cm/m
2HourmmH
2O.The SEM of resulting ceramic for filtration as shown in Figure 2, the pottery after burning till as can be seen from Figure 2 has loose porous structure.
Embodiment 5
(1) by weight, dropped in the ball grinder pulverizing 75 parts of β-cordierite powder of 200 mesh sieves, 15 parts of potassium felspar sands, 15 parts of triphanes, 15 parts of kaolin, 5 parts of mullites, 50 parts of starch and 2 parts of tripoly phosphate sodium STPPs and 125 parts of water, ball milling 6 hours is crossed 80 mesh sieves;
(2) ceramic slurry that obtains is carried out mist projection granulating and make ceramic particle, dry-pressing formed under 200MPa pressure, prepare required ceramic body;
(3) ceramic body that makes is warmed up to 200 ℃ with the heat-up rate of 1 ℃/min, under 1350 ℃ of conditions, burns till, be incubated 5 hours.
Prepared filtering high-temperature flue gas pottery apparent porosity is 58.9%, and ultimate compression strength is 25.7MPa, is not split for 12 times at the heat-shock resistance of room temperature to 1300 ℃, and Gas permeability is 142.9m
3Cm/m
2HourmmH
2O.
Embodiment 6
(1) by weight, dropped in the ball grinder pulverizing 80 parts of β-cordierite powder of 200 mesh sieves, 10 parts of potassium felspar sands, 10 parts of triphanes, 5 parts of kaolin, 1 part of mullite, 30 parts of cinders and 2 parts of tripoly phosphate sodium STPPs and 100 parts of water, ball milling 2 hours is crossed 80 mesh sieves;
(2) ceramic slurry that obtains is carried out mist projection granulating and make ceramic particle, the particulate material that obtains is dry-pressing formed under 0.1MPa pressure, prepare required ceramic body;
(3) ceramic body that makes is warmed up to 200 ℃ with the heat-up rate of 1.5 ℃/min, under 1450 ℃ of conditions, burns till, be incubated 2 hours.
Prepared filtering high-temperature flue gas pottery apparent porosity is 62.7%, and ultimate compression strength is 14.2MPa, is not split for 10 times at the heat-shock resistance of room temperature to 1300 ℃, and Gas permeability is 172.5m
3Cm/m
2HourmmH
2O.
Embodiment 7
(1) by weight, dropped in the ball grinder pulverizing 75 parts of β-cordierite powder of 200 mesh sieves, 15 parts of potassium felspar sands, 10 parts of triphanes, 10 parts of kaolin, 4 parts of mullites, 32 parts of Wingdales and 1.5 parts of tripoly phosphate sodium STPPs and 120 parts of water, ball milling 1 hour is crossed 80 mesh sieves;
(2) ceramic slurry that obtains is carried out mist projection granulating and make ceramic particle, cold isostatic compaction under 150MPa pressure is prepared required ceramic body;
(3) ceramic body that makes is warmed up to 200 ℃ with the heat-up rate of 2 ℃/min, under 1400 ℃ of conditions, burns till, be incubated 30 minutes.
Prepared filtering high-temperature flue gas pottery apparent porosity is 53.5%, and ultimate compression strength is 25.7MPa, is not split for 13 times at the heat-shock resistance of room temperature to 1300 ℃, and Gas permeability is 153.1m
3Cm/m
2HourmmH
2O.
Embodiment 8
(1) by weight, dropped in the ball grinder pulverizing 20 parts of β-cordierite powder of 200 mesh sieves, 0.1 part of potassium felspar sand, 15 parts of triphanes, 15 parts of kaolin, 50 parts of mullites, 15 parts of carbon dusts, 15 parts of starch and 1.5 parts of tripoly phosphate sodium STPPs and 60 parts of water, ball milling 2 hours is crossed 80 mesh sieves;
(2) resulting slurry is injected the gypsum mold moulding and prepare required ceramic body;
(3) ceramic body that makes is warmed up to 200 ℃ with the heat-up rate of 1 ℃/min, under 1200 ℃ of conditions, burns till, be incubated 5 hours.
Prepared filtering high-temperature flue gas pottery apparent porosity is 48.3%, and ultimate compression strength is 16.5MPa, is not split for 9 times at the heat-shock resistance of room temperature to 1100 ℃, and Gas permeability is 128.3m
3Cm/m
2HourmmH
2O.
Claims (6)
1. the preparation method of a high-temperature smoke filter ceramic material with high thermal shock resistance is characterized in that, comprises the steps:
(1) take by weighing raw material by prescription, ball milling 0.5 ~ 24 hour is crossed 80 mesh sieves;
(2 moulding get ceramic body;
(3) ceramic body slowly is heated to 200 ℃, 1100 ~ 1500 ℃ of insulations 5 minutes ~ 6 hours, namely gets ceramic for filtration;
The prescription of described raw material is as follows in parts by weight:
20 ~ 100 parts of β-trichroites
0.1 ~ 50 part of potassium felspar sand
0.1 ~ 50 part of triphane
0.1 ~ 50 part of kaolin
0.1 ~ 50 part of mullite
1 ~ 100 part of pore-forming material
0.1 ~ 5 part of tripoly phosphate sodium STPP
60 ~ 130 parts in water.
2. the preparation method of a kind of high-temperature smoke filter ceramic material with high thermal shock resistance according to claim 1, it is characterized in that described pore-forming material is one or more the mixture in carbon dust, starch, carborundum powder, Wingdale, wood chip, cinder or the ceramic waste material.
3. the preparation method of a kind of high-temperature smoke filter ceramic material with high thermal shock resistance according to claim 1 is characterized in that, described slowly to be heated to 200 ℃ be that heat-up rate with 1 ~ 2 ℃/min is warmed up to 200 ℃.
4. the preparation method of a kind of high-temperature smoke filter ceramic material with high thermal shock resistance according to claim 1 is characterized in that, described ball milling is wet ball grinding.
5. the preparation method of a kind of high-temperature smoke filter ceramic material with high thermal shock resistance according to claim 1 is characterized in that, described dry-pressing formed, cold isostatic compaction or the injection forming of being shaped to.
6. the preparation method of a kind of high-temperature smoke filter ceramic material with high thermal shock resistance according to claim 5 is characterized in that,
Described dry-pressing formed pressure is 0.1 ~ 300MPa; The pressure of described cold isostatic compaction is 0.1 ~ 300MPa.
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| CN103382121B (en) * | 2013-06-26 | 2015-09-02 | 蚌埠德美过滤技术有限公司 | A kind of for ceramic element purifying gasoline and preparation method thereof |
| CN103601480A (en) * | 2013-11-13 | 2014-02-26 | 江苏蓝烽新材料科技有限公司 | Filter body for trapping carbon cigarette pellets of diesel engine and preparation method thereof |
| CN105841536B (en) * | 2016-03-28 | 2018-02-27 | 沧州渤海新区元大自然能源有限公司 | A kind of composite thermal storage body and preparation method |
| CN109650938A (en) * | 2019-01-16 | 2019-04-19 | 赵志刚 | Ceramic filter and its preparation method and application |
| CN110117195A (en) * | 2019-05-30 | 2019-08-13 | 龚建林 | A kind of preparation method of Anti-pressure filtering high-temperature flue gas dedicated ceramic |
| CN110092640A (en) * | 2019-05-30 | 2019-08-06 | 福建省威尔陶瓷股份有限公司 | A kind of high heat resistanceheat resistant, shock resistance domestic ceramics and preparation method thereof |
| CN115340402A (en) * | 2021-05-13 | 2022-11-15 | 中国科学院上海硅酸盐研究所 | Preparation method of gradient silicon nitride capillary core |
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| CN1569306A (en) * | 2004-04-29 | 2005-01-26 | 山东工业陶瓷研究设计院 | Refractory ceramic filtering element for hot gas purification and method for preparing the same |
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| CN1569306A (en) * | 2004-04-29 | 2005-01-26 | 山东工业陶瓷研究设计院 | Refractory ceramic filtering element for hot gas purification and method for preparing the same |
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