CN102517955B - High-wear-resistance low-electrostatic SiC (silicon carbide) ceramic panel for paper machine and method for producing high-wear-resistance low-electrostatic SiC ceramic panel for paper machine - Google Patents
High-wear-resistance low-electrostatic SiC (silicon carbide) ceramic panel for paper machine and method for producing high-wear-resistance low-electrostatic SiC ceramic panel for paper machine Download PDFInfo
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- CN102517955B CN102517955B CN201110426391.XA CN201110426391A CN102517955B CN 102517955 B CN102517955 B CN 102517955B CN 201110426391 A CN201110426391 A CN 201110426391A CN 102517955 B CN102517955 B CN 102517955B
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Abstract
The invention relates to a high-wear-resistance low-electrostatic SiC (silicon carbide) ceramic panel for a paper machine, which belongs to the technical field of paper machine accessories and is made by assembling SiC ceramic blocks with a frame. The SiC ceramic blocks are connected with one another through leads, and each SiC ceramic block is made by ingredient preparation, forming, sintering, cooling and processing and includes, in weight percentage, 75-85% of silicon carbide, 8-15% of silicon powder, 5-10% of carbon powder, 1-3% of calcium silicate and the balance rare earth materials. The SiC ceramic panel is conductive and has resistivity lower than 0.3 omega m. The SiC ceramic panel is high in density, low in porosity, high in wear resistance, conductive, and capable of statically absorbing particles and eliminating scratches of a polyester wire mesh by the particles, so that the service life of the polyester wire mesh is prolonged, stoppage and maintenance time is reduced, materials are saved, and consumption is lowered. The invention further provides a simple and reasonable production method.
Description
Technical field
The present invention relates to a kind of high abrasion, low static SiC ceramic panel and preparation method thereof for paper machine, belong to paper machine accessory technical field.
Technical background
Paper machine has used polyester webs length apart from transmission in the process from slurrying to copy paper, and paper pulp dewaters and forms paper gradually on polyester webs, and polyester webs is because distance must use dehydration support component.Dehydration part not only determines paper forming quality, also affects service life and paper plant's economic benefit of forming net.Therefore the selection of dewatering elements material is very important.Taking dewatering plate as example, panel material develops into all kinds of wear-resistant ceramics by supra polymer high-density polyethylene, and version is by embedded ceramic dewatering plate,, develop into externally embedded type pottery dewatering plate, full pottery dehydration.Aluminium oxide ceramics filler rod is placed in to the most serious position of ultra high molecular polyethylene dewatering plate wearing and tearing, its ABRASION RESISTANCE has ensured that dewatering plate has longer service life, and the shiny surface of its low friction has reduced forming net wearing and tearing and power consumption, the dewatering plate of this version can maintain all the time dehydrating effect and make paper quality in preferable states because maintaining stable appearance and size.In recent years along with the continuous progress and development of domestic and international paper technology and equipment, the speed of a motor vehicle of paper machine is also improving constantly, according to document announcement, the fastest at present external paper machine speed has reached more than 2000 ms/min, under this working condition, its ABRASION RESISTANCE of general alumina ceramic material and mechanical strength can not meet the job requirement of high-speed paper machine, must adopt the demand that intensity is higher, the better ceramic material of ABRASION RESISTANCE meets high-speed paper machine.
Current Al
2o
3also there is a larger defect in the aluminium oxide ceramics dehydration panel of content 99%, although aluminium oxide ceramics dehydration panel hardness is higher, substantially met wear-resisting requirement, because its material is non-conductive and crystallization is too large, thereby cause polyester webs to produce Electrostatic Absorption particle, the particle of polyester webs absorption cannot be cleaned up, and the major reason that the scuffing of particle and crystal boundary causes polyester webs to damage just.
Patent No. ZL95234404.1 has introduced a kind of vacuum suction box face plate for paper-making machine, it by framework, be tabular and form with dewatering plate dewatering hole and that entirety is made up of ceramic material, wherein frame supported fixing dewatering plate and be fixedly connected with vacuum dehydration box body; Have that mechanical strength is high, wear-resistant, anticorrosive, coefficient of friction is little, the uniform feature of dewatering, the service life of greatly improving panel and case net, and paper machine case net spee and dewatering efficiency.
Patent No. ZL 200420041754.3 has introduced a kind of ceramic dewatering element of paper making machine, comprises and is embedded in the pottery dehydration panel that adopts high compact substance fiberglass substrate surface.Adopt high compact substance fiberglass (FRP) material close with the ceramic panel coefficient of expansion to make the substrate of ceramic dewatering element of paper making machine, its advantage is that high specific strength, high specific modulus, thermal coefficient of expansion are little, good stability of the dimension, good high-temperature behavior, good toughness, anti-fatigue performance that ABRASION RESISTANCE is good, good, can one-shot forming, unsuitable flexural deformation and ceramic material caking property is good, rotproofness is good.
Above-mentioned technology has all been considered the wear-resisting problem of dehydration part, does not take into full account the damage that the scuffing of polyester webs Electrostatic Absorption particle to polyester webs and wearing and tearing cause.
Summary of the invention
The object of the present invention is to provide a kind of high abrasion, low static SiC ceramic panel for paper machine, product density is high, the porosity is low, ABRASION RESISTANCE is good, and has electric conductivity, can Electrostatic Absorption particle, eliminate the scuffing of particle to polyester webs, extend polyester webs service life.
The present invention provides the preparation method of advantages of simple simultaneously.
High abrasion, low static SiC ceramic panel for paper machine of the present invention, it is characterized in that utilizing frame to make assembled SiC ceramic block, between every SiC ceramic block, connect with wire successively, SiC ceramic block is after batching, moulding and sintering, make through cold working, its ingredients by weight percentage consists of again: the rare earth material of carborundum 75-85%, metallic silicon power 8-15%, carbon dust 5-10%, calcium silicates 1-3% and surplus; SiC ceramic panel has electric conductivity, and resistivity is below 0.3 Ω m.
Wherein: SiC ceramic block forming method adopts filling forming method or injection moulding method.
SiC ceramic block sintering adopts vacuum-sintering mode, and sintering temperature is: 1600-1700 DEG C, sintering vacuum degree control is 4 × 10
-1below Pa.
The preparation method of advantages of simple is as follows:
First prepare SiC ceramic block, then utilize frame to make assembled SiC ceramic block, between every SiC ceramic block, connect with wire successively; Wherein:
Rare earth material is mainly selected Y
2o
3.
Forming method comprises injection forming, injection moulding, hot-forming, gel injecting method etc.The present invention preferentially adopts injection forming, injection moulding method.
Filling forming method is that ceramic powder is added water and is mixed with mobile slurry, slurry is injected to plaster cast and carry out moulding, and concentration of hydraulic mixture is 14%.
Injection moulding method is batching to be added to heating paraffin mix, adopt ceramic injection forming machine to make the ceramic green of some shapes according to mould by following technical parameter: material cylinder temperature 90-130 DEG C, nozzle temperature 90-120 DEG C, forming pressure 1-4Mpa, 2-10 second inject time, dwell time 10-30 second, mold temperature 30-40 DEG C.
Product sintering comprises normal temperature sintering, hot pressed sintering, vacuum-sintering and atmosphere sintering etc.Preferably adopt vacuum-sintering mode, sintering temperature is: 1600-1700 DEG C, sintering vacuum degree control is 4 × 10
-1below Pa.
When use, SiC ceramic block is used wire ground connection by body.
Assembled employing method for embedding is assembled, comprises embedded, outer embedding or entirety is inlayed or part is inlayed etc.
Frame can adopt aluminium alloy or fiberglass frame etc., can be alone, and frame that also can many materials mixes application.
Compared with prior art, the present invention has following beneficial effect:
The present invention adopts SiC pottery, has considered the advantages such as its covalent bond is strong, and intensity is high, and elastic modelling quantity is large, and in art production process, has added calcium silicates and Y
2o
3deng rare earth material, in sintering process, form the acicular wollastonite of low temperature, be conducive to dense sintering, product density raising, the porosity are reduced.The SiC pottery that the present invention adopts vacuum reaction sintering technique to make, after cold working, makes SiC pottery splicing block, the material such as aluminium alloy, fiberglass for frame, adopt method for embedding to be assembled into paper machine pottery dehydration panel, this dehydration support component is wear-resisting, and life is more than 2 times; Meanwhile, because the SiC pottery of sintering has certain electric conductivity, resistivity reaches below 0.3 Ω m; make the not static electrification of polyester webs of high-speed cruising, reduce the probability of polyester webs absorption impurity particle, significantly extend the service life of paper machine polyester webs; reduce fault power time, materials saving.
By the silicon carbide ceramics surface grinding sintering, frame adopts the materials such as aluminium alloy, fiberglass, adopts method for embedding assembling, and then many assemblies carry out integral grinding polishing, each SiC ceramic panel adopts wire to connect and ground connection, thereby makes high abrasion, low static SiC pottery dehydration panel.This dehydration support component is wear-resisting, and life more than 2 times, also significantly extends the service life of paper machine polyester webs.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1:
High abrasion, low static SiC ceramic panel for paper machine of the present invention, utilize frame to make assembled SiC ceramic block, between every SiC ceramic block, connects successively with wire, and wherein SiC ceramic block is prepared according to following method:
Carborundum powder, metallic silicon power, carbon dust, rare earth material Y
2o
3mix in following ratio: carborundum powder 80%, metallic silicon power 13%, carbon dust 5%, calcium silicates 1% and rare earth material Y
2o
31%, make mud according to common technique, adopt slip-casting shaping process to make ceramic body; Ceramic body is packed in vacuum reaction sintering stove, in sintering process, vacuumize, vacuum reaches 4 × 10
-1pa, obtains high abrasion for paper machine, low static SiC pottery through the high temperature sintering of 1650 DEG C, and resistivity is 0.3 Ω m.
The preparation method of ceramic panel: by the silicon carbide ceramics surface grinding sintering, frame adopts aluminum alloy materials, the assembling of employing method for embedding, then many assemblies carry out integral grinding polishing, each SiC ceramic panel adopts wire to connect and ground connection, thereby makes high abrasion, low static SiC pottery dehydration panel.
Embodiment 2:
High abrasion, low static SiC ceramic panel for paper machine of the present invention, utilize frame to make assembled SiC ceramic block, between every SiC ceramic block, connects successively with wire, and wherein SiC ceramic block is prepared according to following method:
Carborundum powder, metallic silicon power, carbon dust, rare earth material Y
2o
3mix in following ratio: carborundum powder 81%, metallic silicon power 10%, carbon dust 5%, calcium silicates 2% and rare earth material Y
2o
32%, add heating paraffin and mix, adopt ceramic injection forming machine to make the ceramic green of some shapes according to mould by following technical parameter: 110 DEG C of material cylinder temperature, 100 DEG C of nozzle temperature, forming pressure 3MPa, 6 seconds inject time, 30 seconds dwell times, 35 DEG C of mold temperatures.Ceramic body is packed in vacuum reaction sintering stove, in sintering process, vacuumize, vacuum reaches 4 × 10
-1pa, obtains high abrasion for paper machine, low static SiC ceramic panel through the high temperature sintering of 1650 DEG C, and resistivity is 0.26 Ω m.
The preparation method of ceramic panel: by the silicon carbide ceramics surface grinding sintering, frame adopts aluminum alloy materials, the assembling of employing method for embedding, then many assemblies carry out integral grinding polishing, each SiC ceramic panel adopts wire to connect and ground connection, thereby makes high abrasion, low static SiC pottery dehydration panel.
Embodiment 3:
High abrasion, low static SiC ceramic panel for paper machine of the present invention, utilize frame to make assembled SiC ceramic block, between every SiC ceramic block, connects successively with wire, and wherein SiC ceramic block is prepared according to following method:
Carborundum powder, metallic silicon power, carbon dust, rare earth material Y
2o
3mix in following ratio: carborundum powder 83%, metallic silicon power 10%, carbon dust 3%, calcium silicates 3% and rare earth material Y
2o
31%, prepare the common technique of injection forming according to pottery and make mud, adopt slip-casting shaping process to make ceramic body; Ceramic body is packed in vacuum reaction sintering stove, in sintering process, vacuumize, vacuum reaches 4 × 10
-1below Pa, obtain high abrasion for paper machine, low static SiC ceramic panel through the high temperature sintering of 1700 DEG C, resistivity is 0.23 Ω m.
The preparation method of ceramic panel: by the silicon carbide ceramics surface grinding sintering, frame adopts aluminum alloy materials, the assembling of employing method for embedding, then many assemblies carry out integral grinding polishing, each SiC ceramic panel adopts wire to connect and ground connection, thereby makes high abrasion, low static SiC pottery dehydration panel.
Embodiment 4:
High abrasion, low static SiC ceramic panel for paper machine of the present invention, utilize frame to make assembled SiC ceramic block, between every SiC ceramic block, connects successively with wire, and wherein SiC ceramic block is prepared according to following method:
Carborundum powder, metallic silicon power, carbon dust, rare earth material Y
2o
3mix in following ratio: carborundum powder 84%, metallic silicon power 9%, carbon dust 3%, calcium silicates 2% and rare earth material Y
2o
32%, add heating paraffin and mix, adopt ceramic injection forming machine to make the ceramic green of some shapes according to mould by following technical parameter: 130 DEG C of material cylinder temperature, 120 DEG C of nozzle temperature, forming pressure 2Mpa, 4 seconds inject time, 15 seconds dwell times, 40 DEG C of mold temperatures.Ceramic body is packed in vacuum reaction sintering stove, in sintering process, vacuumize, vacuum reaches 3.5 × 10
-1pa, obtains high abrasion for paper machine, low static SiC ceramic panel through the high temperature sintering of 1650 DEG C, and resistivity is 0.19 Ω m.
The preparation method of ceramic panel: by the silicon carbide ceramics surface grinding sintering, frame adopts aluminum alloy materials, the assembling of employing method for embedding, then many assemblies carry out integral grinding polishing, each SiC ceramic panel adopts wire to connect and ground connection, thereby makes high abrasion, low static SiC pottery dehydration panel.
Embodiment 5:
High abrasion, low static SiC ceramic panel for paper machine of the present invention, utilize frame to make assembled SiC ceramic block, between every SiC ceramic block, connects successively with wire, and wherein SiC ceramic block is prepared according to following method:
Carborundum powder, metallic silicon power, carbon dust, rare earth material Y
2o
3mix in following ratio: carborundum powder 75%, metallic silicon power 14%, carbon dust 9%, calcium silicates 1% and rare earth material Y
2o
31%, prepare the common technique of injection forming according to pottery and add adhesive, make mud, adopt slip-casting shaping process to make ceramic body; Ceramic body is packed in vacuum reaction sintering stove, in sintering process, vacuumize, vacuum reaches 3 × 10
-1pa, obtains high abrasion for paper machine, low static SiC ceramic panel through the high temperature sintering of 1600 DEG C, and resistivity is 0.17 Ω m.
The preparation method of ceramic panel: by the silicon carbide ceramics surface grinding sintering, frame adopts glass-reinforced plastic material, the assembling of employing method for embedding, then many assemblies carry out integral grinding polishing, each SiC ceramic panel adopts wire to connect and ground connection, thereby makes high abrasion, low static SiC pottery dehydration panel.
Claims (1)
1. a high abrasion for paper machine, low static SiC ceramic panel, it is characterized in that utilizing aluminum alloy frame SiC ceramic block to be adopted to method for embedding is assembled makes, between every SiC ceramic block, connect with wire successively, SiC ceramic block is after batching, moulding and sintering, make through cold working, its ingredients by weight percentage consists of again: carborundum powder 75%, metallic silicon power 14%, carbon dust 9%, calcium silicates 1% and rare earth material Y
2o
31%; SiC ceramic panel has electric conductivity, and resistivity is 0.17 Ω m;
Wherein:
SiC ceramic block forming method adopts filling forming method: ceramic powder is added water and is mixed with mobile slurry, slurry is injected to plaster cast and carry out moulding, concentration of hydraulic mixture is 14%;
SiC ceramic block sintering adopts vacuum-sintering mode, and sintering temperature is: 1600 DEG C, sintering vacuum degree control is 3 × 10
-1pa.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110426391.XA CN102517955B (en) | 2011-12-19 | 2011-12-19 | High-wear-resistance low-electrostatic SiC (silicon carbide) ceramic panel for paper machine and method for producing high-wear-resistance low-electrostatic SiC ceramic panel for paper machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110426391.XA CN102517955B (en) | 2011-12-19 | 2011-12-19 | High-wear-resistance low-electrostatic SiC (silicon carbide) ceramic panel for paper machine and method for producing high-wear-resistance low-electrostatic SiC ceramic panel for paper machine |
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|---|---|
| CN102517955A CN102517955A (en) | 2012-06-27 |
| CN102517955B true CN102517955B (en) | 2014-12-10 |
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| CN201110426391.XA Expired - Fee Related CN102517955B (en) | 2011-12-19 | 2011-12-19 | High-wear-resistance low-electrostatic SiC (silicon carbide) ceramic panel for paper machine and method for producing high-wear-resistance low-electrostatic SiC ceramic panel for paper machine |
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| CN107935604A (en) * | 2018-01-02 | 2018-04-20 | 佛山市霍普除铁设备制造有限公司 | A kind of ceramic raw material deep processing and production line and production method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3067816A (en) * | 1960-01-20 | 1962-12-11 | Carborundum Co | Apparatus and process for the manufacture of paper |
| US3928125A (en) * | 1972-12-18 | 1975-12-23 | Feldmuehle Anlagen Prod | Water extraction apparatus for papermaking machine |
| US3975568A (en) * | 1972-04-12 | 1976-08-17 | Union Carbide Corporation | Low-friction, wear-resistant material and process for making the same |
| US4047993A (en) * | 1975-11-13 | 1977-09-13 | Heinrich Bartelmuss | Method of making an abrasion-resistant plate |
| CN2232051Y (en) * | 1995-07-21 | 1996-07-31 | 山东省硅酸盐研究设计院 | Vacuum suction box face plate for paper-making machine |
-
2011
- 2011-12-19 CN CN201110426391.XA patent/CN102517955B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3067816A (en) * | 1960-01-20 | 1962-12-11 | Carborundum Co | Apparatus and process for the manufacture of paper |
| US3975568A (en) * | 1972-04-12 | 1976-08-17 | Union Carbide Corporation | Low-friction, wear-resistant material and process for making the same |
| US3928125A (en) * | 1972-12-18 | 1975-12-23 | Feldmuehle Anlagen Prod | Water extraction apparatus for papermaking machine |
| US4047993A (en) * | 1975-11-13 | 1977-09-13 | Heinrich Bartelmuss | Method of making an abrasion-resistant plate |
| CN2232051Y (en) * | 1995-07-21 | 1996-07-31 | 山东省硅酸盐研究设计院 | Vacuum suction box face plate for paper-making machine |
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