CN1300341C - Tamping plug for blast furnace spout and its preparation method - Google Patents
Tamping plug for blast furnace spout and its preparation method Download PDFInfo
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- CN1300341C CN1300341C CNB2005100122230A CN200510012223A CN1300341C CN 1300341 C CN1300341 C CN 1300341C CN B2005100122230 A CNB2005100122230 A CN B2005100122230A CN 200510012223 A CN200510012223 A CN 200510012223A CN 1300341 C CN1300341 C CN 1300341C
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Abstract
The present invention relates to stemming for tap holes of blast furnaces, and a preparation method thereof, which belong to the technical field of fireproofing materials. In the present invention, industrial-grade corundum particle powder, silicon carbide particle powder, medium temperature pitch particle powder, Suzhou clay fine powder and coke powder are used as principal raw materials added with a proper amount of high aluminium powder coal ash; tar oil is used as a binding agent; the stemming for tap holes of blast furnaces is produced by extruding the stirred mixture from a de-airing pug mill. The present invention comprises the components of 20 to 70% wt of corundum particle powder, 1 to 10% wt of silicon carbide particle powder, 7 to 30% wt of Suzhou clay fine powder or Guangxi clay fine powder, 15 to 30% wt of coke powder and 1 to 30% wt of high aluminium powder coal ash. In the present invention, Al2O3 and SiO2 in the high aluminium powder coal ash is used for replacing alumina matter and silicon in the stemming; therefore, the cost of the stemming is effectively reduced; the prepared stemming with stable performances can meet the requirements of industrial production; meanwhile, a new application path is opened up for the comprehensive utilization of pulverized coal ash.
Description
Technical field
The present invention relates to a kind ofly prepare the method for low-cost and high-performance tamping plug for blast furnace spout, belong to technical field of refractory materials by adding aluminous fly-ash.
Background technology
Stemming is a kind of tap a blast furnace refractory materials of mouth of a river shutoff iron notch of iron-smelting blast furnace that is applied to.In the time of on blast furnace taphole is stifled with stemming, to fills full stemming in the passage that taps a blast furnace, and in cupola well, form mud drum, make the iron mouth keep enough degree of depth, require stemming to keep stable aperture when tapping a blast furnace, tap a blast furnace evenly; To avoid the high-temperature fusant mucus of a large amount of fusions and semi-melting to spray after having gone out iron as far as possible.Every day, the iron notch of blast furnace all wanted repeated multiple times to be opened and filling, and red-hot molten iron and slag liquid produce physics and chemical erosion to iron port gun mud.If stemming is of poor quality, will occur Chao Tiekou, shallow iron mouth, disconnected iron mouth during use, run a series of problems such as flowing, reduce pressure, leak informaton, burn out casthouse equipment greatly, influence ordinary production, even cause personal injury accidents.Therefore, require iron port gun mud should have following performance: 1. plasticity-and cohesiveness are good, get into and fill up iron mouth passage easily: 2. void content is suitable, discharges the gentle body of moisture when being convenient to drying; 3. the high volume contraction is little, can avoid cracking; 4. sintering character is good, intensity height, anti-washing away and anti-erosion; 5. opening is functional, and opening machine drill mouth is easy; 6. environmental pollution is little; 7. has high refractoriness.
Up to now, the prescription and the performance of stemming have been carried out number of research projects both at home and abroad, be greatly developed.The large blast furnace of China is generally only established 1 accident cinder notch and 1～4 iron mouth, and the slag iron amount of iron mouth discharge every day is a lot.Satisfy the specification of quality of large blast furnace, must adopt anhydrous stemming iron port gun mud.Anhydrous stemming is a main raw material by corundum raw material, silicon carbide, silicon nitride, coke powder, high-quality bonding clay etc. generally, simultaneously with addition of different admixtures, makes wedding agent with carbolineum, washing oil, tar.This stemming has been owing to adopted the high-quality high pure raw material, and is wedding agent with the carbon raw material, and its anti-scouring is functional, can make the iron mouth time lengthening of tapping a blast furnace, and reduces the number of casts.But, beat mud pressure height, the cost height because of existing its batching strict, tapping outlet difficulty, single are beaten the mud amount, and (it is 50～70kg that medium and small blast furnace is beaten the mud amount at every turn, and large blast furnace is 400～500kg) greatly, a series of problems such as contaminate environment are given to produce to use and are brought disadvantageous effect.Particularly corundum raw material and high-quality bonding clay account for the very big proportion of cost, press for to reduce cost.
Flyash is the waste of a large amount of dischargings of big-and-middle-sized fuel-burning power plant fluidized-bed combustion boiler.It is by the coal dust of wearing into certain fineness thin ash through being collected by dust-precipitator behind the high-temp combustion in fluidized-bed combustion boiler, is called waft ash or flying dust abroad.It is a kind of active material that has, and its main chemical compositions is silicon-dioxide (SiO
2), aluminium sesquioxide (Al
2O
3), small amounts iron (Fe
2O
3) and calcium oxide (CaO) (calcium oxide content is not less when adding calcareous sweetening agent during coal combustion).SiO wherein
2And Al
2O
3Content is the highest, and both sums generally account for more than 60%, is the main active ingredient and the high temperature resistant composition of flyash.Every the kilowatt-hour in coal-burning power plant, need standard coal 300 grams approximately, promptly produce about 100 grams of flyash, one ton of raw coal of every burning can produce 250～300 kilograms in flyash, every kilowatt of installed capacity of coal fired power generation, about one ton of year ash discharge amount, that is to say that installed capacity is 1,000,000 kilowatts a coal-fired power plant, a year ash discharge amount can reach 1,000,000 tons.Quantity is huge flyash so, and what have is discharged into ash, occupies a large amount of farmlands, and what have is discharged into rivers, and environment is polluted.During winter, Coal-fired capacity rises, and causes flying dust increase in the air, influences people's breathing, is detrimental to health.How to solve so a large amount of lime-ash dischargings, eliminate harm,, become an important topic of electric power, environmental protection and materials industry obtaining increment utilization after the reprocessing of flyash process.
The most of power plant of China all are used for flyash producing directly or indirectly, so not only can reduce land seizure, alleviate environmental pollution, and can economize on resources, and create certain economic benefits.Flyash can be used as cement, mortar, concrete adulterant, and become cement, concrete component, and can make vitrified brick, steam-pressing aero-concrete, foamed concrete, hollow block, sintering ceramsite, the making road as the raw material of producing cement; Construct dam body, build the harbour, the backfill of hollow lowland, farmland, subsidence area, colliery and mine; Produce fertilizer, improve the soil etc. all seen report.Present stage, flyash also had some purposes to be in the research and development, for example: from flyash, select iron, extract aluminium, flyash be used for rubber, plastics are made coating, are used for paint, filler or coating are made in papermaking, dispose of sewage with flyash; Produce multicellular glass with flyash, replace building board etc. with powdered coal ash product.
At present, domestic utilization of coal ash is mainly based on building material industries such as cement and concrete, and the increment effect of its utilization is not high, and utilization ratio is still lower, and it is discarded to still have most of flyash to be piled up, and has not only taken a large amount of soils but also serious environment pollution.
Along with the development of fluidized-bed electricity generation boiler technology and the anxiety of supply of electric power and coal resources, taken fire coal and coal gangue mixture of fluidized-bed electricity generation boiler is used for generating.Burning gangue generating produces and the flyash that do not add the calcic sweetening agent is characterized in that alumina content is higher, alumina content greater than 30%, calcium oxide content less than 5%, iron oxide content be less than 5.0% (can pass through magnetic deironing).This by fluidized-bed electricity generation boiler coal combustion and coal gangue mixture and the aluminous fly-ash of output accounts at present that the flyash total emission volumn is or else disconnected to rise, if the above-mentioned high temperature resistant thing flyash mutually such as high alumina content and silicon-dioxide that contain are used to produce the significant wastage that material of construction such as materials for wall will cause the aluminum oxide resource.So the comprehensive utilization of research invention aluminous fly-ash has important practical significance.Simultaneously, fly ash grain is fine, and specific surface area is big, is easy to form new thing mutually with other composition reaction.Therefore, aluminous fly-ash can be used as important inorganic non-metallic resource and is used for fields such as high-temperature refractory.
Summary of the invention
The objective of the invention is at the comprehensive increment utilization and the raw materials used price of tamping plug for blast furnace spout of existing aluminous fly-ash higher, and cause the cost problem of higher, a kind of tamping plug for blast furnace spout and preparation method thereof is proposed, have the good anti-blast furnace slag performance and the tamping plug for blast furnace spout of use properties by in tamping plug for blast furnace spout, adding different mass fractional aluminous fly-ash, preparing.
A kind of tamping plug for blast furnace spout that the present invention proposes, it is characterized in that: this stemming is a main raw material with the native fine powder of technical grade corundum in granules and fine powder, silicon-carbide particle and fine powder, mid-temperature pitch fine powder, Suzhou soil or Guangxi, coke powder, adding aluminous fly-ash, is wedding agent with tar.
In above-mentioned blast furnace iron notch stemming, described corundum in granules and fine powder also can be electric smelting compact alumina, fused white corundum, fused brown corundum or compact high-alumina bauxite clinker.
In above-mentioned blast furnace iron notch stemming, Al in described technical grade corundum in granules and the fine powder
2O
3Content is greater than 80%, and granular size is≤10mm to account for 20～70% of total batching massfraction; SiC content is greater than 90% in described silicon-carbide particle and the fine powder, and granular size is≤3mm to account for total batching massfraction 3～25%; The granular size of described mid-temperature pitch fine powder is≤0.1mm), account for 1～10% of total batching massfraction; The granular size of Suzhou soil or Guangxi soil fine powder is≤0.1mm to account for 7～30% of total batching massfraction; The granular size of coke powder is≤0.1mm to account for 15～30% of total batching massfraction; Alumina content is greater than 30% in the aluminous fly-ash, and calcium oxide content is less than 5%, and described flyash is the flyash that does not add the calcic sweetening agent of fluidized-bed electricity generation boiler output, accounts for 1～30% of total batching massfraction.
In above-mentioned blast furnace iron notch stemming, in the described aluminous fly-ash alumina content greater than 30%, calcium oxide content less than 5%, ferric oxide is less than 5.0%, it is the aluminous fly-ash that does not add the calcic sweetening agent of fluidized-bed electricity generation boiler coal combustion and coal gangue mixture output.
The preparation method of a kind of tamping plug for blast furnace spout that the present invention proposes, it is characterized in that: described method is that various raw materials are prepared burden earlier in described ratio, then admixtion is stirred in stirrer, add 10～26% wedding agent tar simultaneously, restir, extrude through vacuum deairing machine, be this tamping plug for blast furnace spout.
Because high temperature resistant things such as the aluminum oxide that the aluminous fly-ash that uses among the present invention contains larger proportion and silicon-dioxide mutually, the main chemical constitution of its flyash is: SiO
2: 40%～60% Al
2O
3: 30%～50%, aluminous fly-ash can partly replace the corundum raw material used in traditional tamping plug for blast furnace spout and the fine powder of raw clay, effectively reduce the cost of tamping plug for blast furnace spout like this, simultaneously prepared stemming stable performance, can satisfy the production requirement of commercial performance, new application approach has also been opened up in comprehensive utilization to aluminous fly-ash.
Embodiment
Below in conjunction with embodiment technical scheme of the present invention is described further:
The present invention at first prepares burden various raw materials earlier in described ratio, admixtion stirs to add after 2～10 minutes and adds tar wedding agent (add-on is 10～26%) restir and extrude through vacuum deairing machine after 10～30 minutes then, can be with this stemming packing shipping.When the on-the-spot use of blast furnace iron notch, directly stemming is squeezed in the blast furnace iron notch and can uses.
Preparation technology's flow process of adding the tamping plug for blast furnace spout of aluminous fly-ash is:
Raw material → batching → stirrer stirring → interpolation tar wedding agent → stirrer stirring → vacuum deairing machine is extruded → is packed → shipping → user → use
Embodiment 1
Raw material:
The particle of technical grade corundum raw material and the specification of quality of fine powder are Al
2O
3Content generally is greater than 98%, and volume density is greater than 3.4g/cm
3, granular size is≤10mm.Wherein the corundum feed particles of 10～5mm accounts for 5% of total batching massfraction, 5～3mm corundum feed particles accounts for 20% of total batching massfraction, 3～1mm corundum feed particles accounts for total batching massfraction 10%, accounts for 5% of total batching massfraction less than 1mm corundum feed particles.Technical grade corundum add-on accounts for 40% of total batching massfraction;
The specification of quality of silicon-carbide particle and fine powder is, the SiC content requirement is greater than 97%, and granular size is≤0.3mm that add-on accounts for 13% of total batching massfraction;
The mid-temperature pitch fine powder (granular size for≤0.1mm) according to accounting for 6% of total batching massfraction;
Suzhou soil or Guangxi soil fine powder (granular size for≤0.1mm) according to accounting for 15% of total batching massfraction;
Coke powder (granular size for≤0.1mm) according to accounting for 20% of total batching massfraction;
Aluminous fly-ash (requirement be alumina content greater than 30% and calcium oxide content less than the flyash that does not add the calcic sweetening agent of 5% fluidized-bed electricity generation boiler output) account for 6% of total batching massfraction.
Above-mentioned various raw materials are prepared burden earlier in ratio of the present invention, and admixtion stirs to add after 8 minutes and adds tar wedding agent (add-on is 20%) restir and extrude through vacuum deairing machine after 30 minutes then, can be with this stemming packing shipping.When the on-the-spot use of blast furnace iron notch, directly stemming is squeezed in the blast furnace iron notch and can uses.
The physicochemical property of sample is: 200 ℃ of * 24h volume density 1.91g/cm
3, 1400 ℃ of * 4h volume density 2.26g/cm
3200 ℃ of * 24h compressive strength 11.48pa, 1400 ℃ of * 4h compressive strength 46.2Mpa, 1480 ℃ of * 4h compressive strength 51.2Mpa; 200 ℃ of * 24h folding strength 6.06Mpa, 1400 ℃ of * 4h folding strength 5.19Mpa; 1480 ℃ of * 4h folding strength 7.51Mpa.
Embodiment 2
Raw material:
The particle of technical grade palm fibre corundum raw material and the specification of quality of fine powder are Al
2O
3Content generally is greater than 90%, and volume density is greater than 3.4g/cm
3, granular size is≤10mm.Wherein the corundum feed particles of 10～5mm accounts for 2% of total batching massfraction, 5～3mm corundum feed particles accounts for 15% of total batching massfraction, 3～1mm corundum feed particles accounts for total batching massfraction 18%, accounts for total batching massfraction 15% less than 1mm corundum feed particles.Technical grade corundum add-on accounts for 50% of total batching massfraction;
The specification of quality of silicon-carbide particle and fine powder is, the SiC content requirement is greater than 90%, and granular size is≤0.3mm that add-on accounts for 3% of total batching massfraction;
The mid-temperature pitch fine powder (granular size for≤0.1mm) according to accounting for 9% of total batching massfraction;
Suzhou soil or Guangxi soil fine powder (granular size for≤0.1mm) according to accounting for 10% of total batching massfraction;
Coke powder (granular size for≤0.1mm) according to accounting for 16% of total batching massfraction;
Aluminous fly-ash (requirement be alumina content greater than 30% and calcium oxide content less than the flyash that does not add the calcic sweetening agent of 5% fluidized-bed electricity generation boiler output) account for 12% of total batching massfraction.
Above-mentioned various raw materials are prepared burden earlier in ratio of the present invention, and admixtion stirs to add after 10 minutes and adds tar wedding agent (add-on is 20%) restir and extrude through vacuum deairing machine after 26 minutes then, can be with this stemming packing shipping.When the on-the-spot use of blast furnace iron notch, directly stemming is squeezed in the blast furnace iron notch and can uses.
The physicochemical property of sample is: 200 ℃ of * 24h volume density 1.83g/cm
3, 1400 ℃ of * 4h volume density 2.11g/cm
3200 ℃ of * 24h compressive strength 10.38pa, 1400 ℃ of * 4h compressive strength 43.4Mpa, 1480 ℃ of * 4h compressive strength 48.2Mpa; 200 ℃ of * 24h folding strength 5.86Mpa, 1400 ℃ of * 4h folding strength 5.12Mpa; 1480 ℃ of * 4h folding strength 6.71Mpa.
Embodiment 3
Raw material:
The particle of compact high-alumina bauxite clinker raw material and the specification of quality of fine powder are Al
2O
3Content generally is greater than 80%, and volume density is greater than 3.1g/cm
3, granular size is≤10mm.Wherein the corundum feed particles of 10～5mm accounts for 6% of total batching massfraction, 5～3mm corundum feed particles accounts for 14% of total batching massfraction, 3～1mm corundum feed particles accounts for total batching massfraction 28%, accounts for total batching massfraction 12% less than 1mm corundum feed particles.Technical grade corundum add-on accounts for 35% of total batching massfraction;
The specification of quality of silicon-carbide particle and fine powder is, the SiC content requirement is greater than 90%, and granular size is≤0.3mm that add-on accounts for 7% of total batching massfraction;
The mid-temperature pitch fine powder (granular size for≤0.1mm) according to accounting for 5% of total batching massfraction;
Suzhou soil or Guangxi soil fine powder (granular size for≤0.1mm) according to accounting for 8% of total batching massfraction;
Coke powder (granular size for≤0.1mm) according to accounting for 25% of total batching massfraction;
Aluminous fly-ash (requirement be alumina content greater than 30% and calcium oxide content less than the flyash that does not add the calcic sweetening agent of 5% fluidized-bed electricity generation boiler output) account for 20% of total batching massfraction.
Above-mentioned various raw materials are prepared burden earlier in ratio of the present invention, and admixtion stirs to add after 15 minutes and adds tar wedding agent (add-on is 20%) restir and extrude through vacuum deairing machine after 25 minutes then, can be with this stemming packing shipping.When the on-the-spot use of blast furnace iron notch, directly stemming is squeezed in the blast furnace iron notch and can uses.
The physicochemical property of sample is: 200 ℃ of * 24h volume density 1.73g/cm
3, 1400 ℃ of * 4h volume density 2.31g/cm
3200 ℃ of * 24h compressive strength 13.01pa, 1400 ℃ of * 4h compressive strength 42.4Mpa, 1480 ℃ of * 4h compressive strength 50.2Mpa; 200 ℃ of * 24h folding strength 6.03Mpa, 1400 ℃ of * 4h folding strength 5.42Mpa; 1480 ℃ of * 4h folding strength 6.48Mpa.
Claims (4)
1, a kind of tamping plug for blast furnace spout is characterized in that: this stemming is a main raw material with technical grade corundum in granules and fine powder, silicon-carbide particle and fine powder, mid-temperature pitch fine powder, well as clay fines, coke powder, adds aluminous fly-ash, is wedding agent with tar; Al in described technical grade corundum in granules and the fine powder
2O
3Content is greater than 80%, and granular size is≤10mm to account for 20～70% of total batching massfraction; SiC content is greater than 90% in described silicon-carbide particle and the fine powder, and granular size is≤3mm to account for total batching massfraction 3～25%; The granular size of described mid-temperature pitch fine powder is≤0.1mm to account for 1～10% of total batching massfraction; The granular size of well as clay fines is≤0.1mm to account for 7～30% of total batching massfraction; The granular size of coke powder is≤0.1mm to account for 15～30% of total batching massfraction; Alumina content is greater than 30% in the aluminous fly-ash, and calcium oxide content is less than 5%, and described flyash is the flyash that does not add the calcic sweetening agent of fluidized-bed electricity generation boiler output, accounts for 1～30% of total batching massfraction.
2, blast furnace iron notch stemming according to claim 1 is characterized in that: described corundum in granules and fine powder are electric smelting compact alumina, fused white corundum, fused brown corundum or compact high-alumina bauxite clinker.
3, tamping plug for blast furnace spout according to claim 1, it is characterized in that: in the described aluminous fly-ash alumina content greater than 30%, calcium oxide content less than 5%, ferric oxide is less than 1.0%, it is the aluminous fly-ash that does not add the calcic sweetening agent of fluidized-bed electricity generation boiler coal combustion and coal gangue mixture output.
4, a kind of method for preparing tamping plug for blast furnace spout as claimed in claim 1, it is characterized in that: described method is that various raw materials are prepared burden earlier in described ratio, then admixtion is stirred in stirrer, add 10～26% wedding agent tar simultaneously, restir, extrude through vacuum deairing machine, be this tamping plug for blast furnace spout.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100122230A CN1300341C (en) | 2005-07-19 | 2005-07-19 | Tamping plug for blast furnace spout and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100122230A CN1300341C (en) | 2005-07-19 | 2005-07-19 | Tamping plug for blast furnace spout and its preparation method |
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|---|---|
| CN1718752A CN1718752A (en) | 2006-01-11 |
| CN1300341C true CN1300341C (en) | 2007-02-14 |
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| CNB2005100122230A Expired - Fee Related CN1300341C (en) | 2005-07-19 | 2005-07-19 | Tamping plug for blast furnace spout and its preparation method |
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341821C (en) * | 2006-05-19 | 2007-10-10 | 王恩余 | Blast furnace taphole Al2O3-SiC-C system no-water cannon mire |
| CN101602609B (en) * | 2009-07-24 | 2012-07-25 | 中国地质大学（北京） | Method for preparing Fe-Si3N4 fireproof raw material |
| CN102060548B (en) * | 2009-11-16 | 2013-02-20 | 中冶建筑研究总院有限公司 | Stemming utilizing waste refractory material and preparation method thereof |
| CN101736107B (en) * | 2010-01-14 | 2011-06-01 | 山西太钢不锈钢股份有限公司 | Method for poking air inlet of blast furnace |
| CN102515790B (en) * | 2011-11-14 | 2013-08-21 | 浙江锦诚耐火材料有限公司 | Environment friendly blast furnace stemming |
| CN103172389A (en) * | 2011-12-22 | 2013-06-26 | 中冶建筑研究总院有限公司 | Blast furnace gun mud added with SiAlON synthesized through coal ash and preparation method of blast furnace gun mud |
| TWI498427B (en) * | 2012-09-11 | 2015-09-01 | China Steel Corp | Composition of blast furance mud |
| CN104140276B (en) * | 2013-05-09 | 2016-07-06 | 中冶建筑研究总院有限公司 | Tamping plug for blast furnace spout and preparation method thereof |
| CN103360096A (en) * | 2013-07-31 | 2013-10-23 | 武汉钢铁(集团)公司 | Tap hole stemming for large-scale blast furnace and preparation method |
| CN103396136B (en) * | 2013-07-31 | 2014-12-10 | 武汉钢铁(集团)公司 | Stemming for super-huge type blast furnace and preparation method thereof |
| CN104650403A (en) * | 2015-02-12 | 2015-05-27 | 柳州聚龙科技有限公司 | High-temperature-resistant damping rubber pad |
| CN105174985A (en) * | 2015-11-03 | 2015-12-23 | 张婷 | Stable-taphole blast furnace stemming |
| CN105237012B (en) * | 2015-11-04 | 2017-05-24 | 湖南立达高新材料有限公司 | Stemming for taphole of ore hearth and preparation method thereof |
| CN107840670A (en) * | 2017-11-06 | 2018-03-27 | 方文成 | A kind of mineral hot furnace anhydrous stemming and preparation method thereof |
| CN111848190B (en) * | 2020-07-29 | 2023-03-17 | 郑州科信炉料有限公司 | Environment-friendly anhydrous stemming for double-taphole blast furnace and preparation method thereof |
| CN112225536B (en) * | 2020-10-14 | 2022-09-20 | 内蒙古鄂尔多斯电力冶金集团股份有限公司 | Anhydrous stemming for ferrosilicon ore heating furnace |
| CN113860891A (en) * | 2021-09-28 | 2021-12-31 | 中冶检测认证有限公司 | Single-field anhydrous stemming for high-strength smelting small blast furnace and preparation method and application thereof |
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|---|---|
| CN1718752A (en) | 2006-01-11 |
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