CN102765952B - Composite roll outer periphery material and preparation method thereof - Google Patents
Composite roll outer periphery material and preparation method thereof Download PDFInfo
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- CN102765952B CN102765952B CN 201210277096 CN201210277096A CN102765952B CN 102765952 B CN102765952 B CN 102765952B CN 201210277096 CN201210277096 CN 201210277096 CN 201210277096 A CN201210277096 A CN 201210277096A CN 102765952 B CN102765952 B CN 102765952B
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Abstract
The invention discloses a composite roll outer periphery material which comprises 10-80 parts of high-aluminum fibers or polycrystalline mullite fibers, 5-40 parts of CA-50 or CA-70 aluminate cement, 5-40 parts of clay or kaoline, 0-9 parts of silicon oxide or aluminum oxide micro-powder, 0.5-5 parts of silica micro-powder, 0.5-5 parts of kyanite, 0.2-5.0 parts of flocculants and 1000-4000 parts of water. The invention further discloses a preparation method of the composite roll outer periphery material, and the method includes: dispersing the high-aluminum fibers or the polycrystalline mullite fibers in water, and then adding the residual raw materials to stir for 5-60 minutes; and forming by means of pressure filtration or suction filtration, drying in shade and conserving for 8-72 hours, and curing for 2-48 hours at the temperature of 80-160 DEG C. The composite roll outer periphery material has the advantages of service life longer than six months, no asbestos fibers, resistance to high temperature of 1200-1500 DEG C, anti-oxidation, high abrasive resistance, good thermal shock resistance and excellent nodulation resistance.
Description
Technical field
The present invention relates to outer ring material of a kind of high-temperature fibre composite roll and preparation method thereof, be specifically related to a kind of outer ring material of high temperature resistance and long life-span composite roll and this material preparation method thereof that is applicable to heat-treat the fiber composite of using in the stove such as stainless steel, siliconized plate, galvanized sheet etc.
Background technology
Metallurgy industry silicon steel, stainless steel, galvanized sheet continuous heat treating furnace furnace bottom roll are under 800 ~ 1200 ℃ high temperature, under reducing atmosphere or weak oxide atmosphere is medium-term and long-term uses.Therefore, not only require furnace bottom roll to have higher high temperature strength, but also require it in reducing atmosphere or weak oxide atmosphere, to possess good chemical stability, wear resistance, surface dross does not take place, to ensure the quality product of siliconized plate, stainless steel, galvanized sheet.For this reason, the furnace roller of roller bottom type High Temperature Furnaces Heating Apparatus employing at present has 4 types: high temperature steel furnace roller, ceramic furnace roller, carbon cover furnace roller and fiber roller.
After furnace temperature surpassed 1000 ℃, high temperature steel furnace roller and ceramic furnace roller all can produce cut to surface of steel plate, and the high temperature abrasion resistance of carbon cover roller is poor, and work-ing life is short, and high temperature is easy to dross surface of steel plate is produced impression.
The applicant has noticed that the Chinese patent publication number is " collars of roller hearth furnace furnace roller " of CN101812580A, and it is to comprise outer shroud, interior ring, and the material of outer shroud is high temperature ceramic material, and the material of interior ring is high temperature steel, connects by key between interior ring and the outer shroud.Described outer shroud high temperature ceramic material contains 45% alchlor (weight), 1% chromic oxide, 36% zirconium white, 17% silicon-dioxide, 1% calcium oxide, adopts the vibration casting moulding, and burns till under 1200 ℃.Because above-mentioned materials existing problems; Outer shroud density of material height increases the load-bearing of furnace roller, and needs high temperature sintering, and cost is higher, and influence is used, and its tooling cost height most importantly, and scratch steel billet easily influences quality product, so also not seen widespread use.
In addition, the applicant has been also noted that the Chinese patent publication number is " ceramic compound coat bottom roller for silicon steel continuous annealing furnace " that CN1172172A introduces, it is ceramic coated compound coating on furnace bottom roll jacket, this compound coating be divided into the bottom that once is sprayed on furnace bottom roll jacket (being generally heat-resisting alloy steel) surface, again be sprayed on the bottom transition layer, be sprayed on upper layer on the transition layer at last.It is nickelalloy (NiCr) powder of 180 ~ 240 μ m that primer adopts powder size, and it is the PSZ (ZrO of 160 ~ 20 μ m that transition layer adopts powder size
2) mixed powder of the same nickelalloy of ceramic powder (NiCr) powder, it is the fully stabilized zirconia (ZrO of 120 ~ 10 μ m that upper layer adopts powder size
2) ceramic powder.Although to zirconium white (ZrO
2) stablizer done preferred selection, as selected CaO, MgO, Y for use
2O
3, CeO
2Or Y
2O
3-CeO
2One package stabilizer, and the component of stablizer arranged.But above-mentioned materials is selected also existing problems; It is very fragile that its wear resistance, heat-shock resistance, resistive connection knurl all show.Therefore, the temperature resistant range of this furnace bottom roll exists the restriction that some heat treatment requirements is higher than the high trade mark product of this temperature value at 950 ℃ ~ 1050 ℃; Secondly because with the spraying preparation method, layer with layer between material different, the interlayer bonding force is poor, easily peels off in the use, so also fail practical application.
At present the asbestos composite roll Taiyuan Iron and Steel Co. and Baosteel result of use still can, can not produce cut to surface of steel plate, the effect of heat insulation that has concurrently simultaneously reduces the roll body bending.But well-known, fibrous magnesium silicate is considered to carcinogenic substance, and it can cause mesothelioma and lung cancer, is prohibited use on the International Industry.And the fibrous magnesium silicate roller that uses is easy to wearing and tearing and cracking under high temperature (more than 1100 ℃) condition at present, and lack (less than 3 months) work-ing life, brings the trouble of frequent roll change to production, becomes the bottleneck that High Temperature Furnaces Heating Apparatus is produced.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of prior art, provide a kind of work-ing life greater than 6 months, do not contain fibrous magnesium silicate, anti-1200 ℃ ~ 1500 ℃ high temperature, anti-oxidant, wear resistance good, the outer ring material of composite roll of good thermal shock and resistive connection knurl excellence.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: the outer ring material of a kind of composite roll, and this material is prepared by each component raw material of following parts by weight:
Described high aluminum fiber or polycrystalline mullite fibre are that diameter is at 2 ~ 10 μ m, the fiber of length 10 ~ 60mm.
The mean particle size of described CA-50 or CA-70 aluminate cement is 3 ~ 20 μ m.
Described clay or kaolinic mean particle size are 0.5 ~ 10 μ m.
The grain composition of described ultrafine silica powder or alumina powder, silicon powder, kyanite etc. was 200 ~ 800 mesh sieves, and namely granularity is 200 ~ 800 orders.
Flocculation agent of the present invention is that one or more arbitrary proportions in positively charged ion, negatively charged ion or the amphoteric polyacrylamide mix.
Another technical problem that the present invention will solve, provide a kind of can ensure whole bonding force desirable, the composite roll outer shroud preparation methods of phenomenon, long service life such as can not occur chapping, peel off in use.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of composite roll outer shroud preparation methods, and preparation process comprises:
A) batching: according to the composition of raw materials ratio of the outer ring material of above-mentioned composite roll, high aluminum fiber or polycrystalline mullite fibre are put into the charging basket of having contained water, add clay or kaolin, silicon oxide or aluminum oxide, SILICA FUME, kyanite, CA-50 or CA-70 aluminate cement and flocculation agent then successively;
B) stir: under the normal temperature and pressure, with the compound stirring of step (a), mixing speed 100 ~ 1200rpm, churning time 5 ~ 60 minutes;
C) moulding: step (b) is stirred the gained compound carry out using mechanical pressing behind pressure filtration molding or the suction filtration;
D) maintenance is dried in the shade; With the material after step (c) moulding at room temperature, placed 8 ~ 72 hours;
E) dry: the material after step (d) maintenance is dried in the shade is dried and was obtained the outer ring material of composite roll in 2 ~ 48 hours in 80 ~ 160 ℃ of scopes.
Composite roll outer shroud preparation methods of the present invention, high aluminum fiber in step a) or polycrystalline mullite fibre are that (the wet method slagging-off is the industry routine techniques through the wet method slagging-off, those skilled in the art all can operate, do not repeat them here) after raw material, or high aluminum fiber or the polycrystalline mullite fibre directly bought after the wet method slagging-off use.
Composite roll outer shroud preparation methods of the present invention, when using mechanical pressing behind the pressure filtration molding in the step c) moulding process or the suction filtration, its pressure is 0.1 ~ 5.0MPa, the dwell time is 15 ~ 120S.
Composite roll outer shroud preparation methods of the present invention, water ratio is 5% ~ 50%(weight percent in through the goods behind press filtration or the suction filtration).
Composite roll outer shroud preparation methods of the present invention, the goods behind process press filtration or suction filtration, the curing time that dries in the shade is preferably 24 hours.
Composite roll of the present invention (furnace roller) comprises outer shroud, interior ring.Outer shroud is fibre composite (namely the outer ring material of being prepared by the present invention's invention of composite roll constitutes), and the material of interior ring (high temperature steel roller core) is high temperature steel ().
After the above-mentioned composite roll outer shroud of the present invention preparation methods, also comprise the outer ring material after the oven dry is carried out the processing and packing step, be the industry routine techniques: the oven dry back outer ring material of gained composite roll is base substrate, idiosome is struck out ring at punch press, be enclosed within then on the high temperature steel roller core, lathe with metal processing usefulness carries out repaired biscuit, i.e. preparation becomes the composite roll in high temperature resistance and long life-span.
Advantage of the present invention and beneficial effect:
Outer ring material of the high temperature resistance and long life-span composite roll of fiber composite of the present invention and preparation method thereof, the difference with the prior art point is:
1. high temperature resistance and long life-span composite roll provided by the invention can tolerate 1200 ℃ ~ 1500 ℃ high-temperature oxidation resistances, and the surface can dross;
2. the preparation technology of high temperature resistance and long life-span composite roll provided by the invention is simple, does not need high temperature sintering, saves cost;
3. high temperature resistance and long life-span composite roll provided by the invention, after oven dry, the extruding rebound resilience is good, highly processable, the Vehicle Processing rear surface is smooth, in use can not cause scuffing to steel plate;
4. high temperature resistance and long life-span composite roll provided by the invention, the discord steel plate reacts under reducing atmosphere and weak oxide atmosphere, can life-time service under 1200 ℃;
5. high temperature resistance and long life-span composite roll provided by the invention, in use, be full of cracks, peeling phenomenon can not appear in material monolithic bonding force ideal in the use, long service life (six months and more than);
6. the density of the high temperature resistance and long life-span composite roll of the present invention's preparation reaches 0.8 ~ 1.3 gram per centimeter
3, under 24 hours conditions of 1200 ℃ of heating, shrink little, radial shrinkage≤2.5%, production cost is low.
7. the present invention can be used as special steel roller-hearth solution heat treatment furnace with furnace bottom roll and other high temperature furnace used furnace bottom rolls, substitutes the furnace bottom roll that has asbestos running roller and import now.
Description of drawings
Fig. 1 high temperature resistance and long life-span of the present invention composite roll structural representation.
As shown in the figure: 1. encircle in the high temperature steel, 2. high-temperature fibre composite roll outer shroud.
Preparation technology's schema of Fig. 2 composite roll of the present invention.
Embodiment
The invention is further illustrated by the following examples, but the present invention not only is confined to following examples.
The equipment that preparation process of the present invention is used is the general equipment of industry, and fibrous magnesium silicate does not contain hazardous substance in the high temperature resistance and long life-span composite roll of the final fiber composite of preparation.
Accurately take by weighing the raw material of following formula rate: high aluminum fiber 400 grams, CA-50 aluminate cement 250 grams, kaolin 250 grams, alumina powder 60 grams, silicon powder 20 grams, kyanite 20 grams, additional flocculating agents (cationic-type polyacrylamide) 7.0 grams, water 15000ml mix, mix about 30min with churned mechanically method, have until the slip sense organ and well on good mobility and the feel stop to stir when dispersed.
Above-mentioned slurry is carried out vacuum filtration at the suction filtration machine, require upper and lower surface smooth, take out then and carry out mechanical pressing, the control of goods water ratio is about 20 ~ 30% after the press filtration.The maintenance 24 hours of drying in the shade after the depanning, baking 8 hours in 110 ℃ environment then.
As shown in Figure 1: the base substrate after will drying strikes out ring (being high-temperature fibre composite roll outer shroud 2) at punch press, be enclosed within then on the high temperature steel roller core (being ring 1 in the high temperature steel), lathe with metal processing usefulness carries out repaired biscuit, i.e. preparation becomes the composite roll (for the industry routine techniques, not giving unnecessary details at this) in high temperature resistance and long life-span.
Embodiment 2:
Accurately take by weighing the raw material of following formula rate: high aluminum fiber 450 grams, CA-50 aluminate cement 270 grams, clay 315 grams, alumina powder 45 grams, silicon powder 22.5 grams, kyanite 22.5 grams, additional flocculating agents (cationic-type polyacrylamide) 7.5 grams, water 16000ml mix, mix about 30min with churned mechanically method, have until the slip sense organ and well on good mobility and the feel stop to stir when dispersed.
Above-mentioned slurry is carried out press filtration at pressure filter, and pressure 0.6 ~ 1.0MPa requires upper and lower surface smooth, and the control of goods water ratio is about 20 ~ 30% after the press filtration.The maintenance 24 hours of drying in the shade after the depanning, baking 8 hours in 110 ℃ environment then.Base substrate after the oven dry is enclosed within on the high temperature steel roller core, and the lathe of processing usefulness with metal carries out repaired biscuit, i.e. preparation becomes the composite roll in high temperature resistance and long life-span.
Embodiment 3:
Accurately take by weighing the raw material of following formula rate: polycrystalline mullite fibre 374 grams, CA-70 aluminate cement 225 grams, kaolin 225 grams, alumina powder 75 grams, ultrafine silica powder 18.7 grams, kyanite 18.7 grams, additional flocculating agents (cationic-type polyacrylamide) 7.0 grams, water 15000ml mix, mix about 30min with churned mechanically method, have until the slip sense organ and well on good mobility and the feel stop to stir when dispersed.
Above-mentioned slurry is carried out press filtration at pressure filter, and pressure 0.6 ~ 1.0MPa requires upper and lower surface smooth, and the control of goods water ratio is about 20 ~ 30% after the press filtration.The maintenance 24 hours of drying in the shade after the depanning, baking 8 hours in 110 ℃ environment then.Base substrate after the oven dry is enclosed within on the high temperature steel roller core, and the lathe of processing usefulness with metal carries out repaired biscuit, i.e. preparation becomes the composite roll in high temperature resistance and long life-span.
Embodiment 4:
Accurately take by weighing the raw material of following formula rate: polycrystalline mullite fibre 328 grams, CA-70 aluminate cement 234 grams, kaolin 281 grams, alumina powder 65 grams, silicon powder 14.0 grams, kyanite 14.0 grams, additional flocculating agents (cationic-type polyacrylamide) 7.0 grams, water 12000ml mix, mix about 30min with churned mechanically method, have until the slip sense organ and well on good mobility and the feel stop to stir when dispersed.
Above-mentioned slurry is carried out press filtration at pressure filter, and pressure 0.6 ~ 1.0MPa requires upper and lower surface smooth, and the control of goods water ratio is about 20 ~ 30% after the press filtration.The maintenance 24 hours of drying in the shade after the depanning, baking 8 hours in 110 ℃ environment then.Base substrate after the oven dry is enclosed within on the high temperature steel roller core, and the lathe of processing usefulness with metal carries out repaired biscuit, i.e. preparation becomes the composite roll in high temperature resistance and long life-span.
Sample after the oven dry and present certain steel mill's import running roller are compared test, and data are as shown in table 1 below:
Table 1 embodiment of the invention 1-4 sample and import running roller performance are relatively
As above shown in the table, the performance of the composite roll of the inventive method preparation is better than the performance of import running roller.
Claims (9)
1. the outer ring material of a composite roll is characterized in that: this material is by each component raw material preparation of following parts by weight:
2. the outer ring material of composite roll according to claim 1, it is characterized in that: the diameter of described high aluminum fiber or polycrystalline mullite fibre is 2～10 μ m, and length is 10～60mm.
3. the outer ring material of composite roll according to claim 1, it is characterized in that: the mean particle size of described CA-50 or CA-70 aluminate cement is 3～20 μ m.
4. the outer ring material of composite roll according to claim 1, it is characterized in that: the mean particle size of described clay is 0.5～10 μ m.
5. the outer ring material of composite roll according to claim 1, it is characterized in that: the grain composition of described ultrafine silica powder or alumina powder, silicon powder, kyanite was 200～800 mesh sieves.
6. the outer ring material of composite roll according to claim 1, it is characterized in that: described flocculation agent is that one or more arbitrary proportions in positively charged ion, negatively charged ion or the amphoteric polyacrylamide mix.
7. the described composite roll outer shroud of claim 1 preparation methods, it is characterized in that: preparation process comprises:
(a) batching: according to the composition of raw materials ratio of the outer ring material of above-mentioned composite roll, high aluminum fiber or polycrystalline mullite fibre are put into the charging basket of having contained water, add clay, silicon oxide or aluminum oxide, SILICA FUME, kyanite, CA-50 or CA-70 aluminate cement and flocculation agent then successively;
(b) stir: under the normal temperature and pressure, with the compound stirring of step (a), mixing speed 100～1200rpm, churning time 5～60 minutes;
(c) moulding: step (b) is stirred the gained compound carry out using mechanical pressing behind pressure filtration molding or the suction filtration;
(d) maintenance is dried in the shade; With the material after step (c) moulding at room temperature, placed 8～72 hours;
(e) dry: the material after step (d) maintenance is dried in the shade is dried and was obtained the outer ring material of composite roll in 2～48 hours in 80～160 ℃ of scopes.
8. composite roll outer shroud preparation methods according to claim 7, it is characterized in that: when using mechanical pressing behind the pressure filtration molding in described step (c) moulding process or the suction filtration, pressure is 0.1～5.0MPa, and the dwell time is 15～120S; Water ratio is 5%～50% in the goods behind process press filtration or the suction filtration.
9. composite roll outer shroud preparation methods according to claim 7, it is characterized in that: the described curing time that dries in the shade is 24 hours.
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| IN2014DN08146A (en) | 2012-07-09 | 2015-05-01 | Nippon Steel & Sumitomo Metal Corp | |
| CN103342524B (en) * | 2013-07-08 | 2015-09-09 | 平顶山天安煤业股份有限公司勘探工程处 | A kind of mine sealing grout material and preparation method thereof |
| CN105236999B (en) * | 2015-09-11 | 2018-03-06 | 洛阳科创新材料股份有限公司 | A kind of preparation method of normalizing furnace bottom-roller |
| CN113200758A (en) * | 2021-05-19 | 2021-08-03 | 河南省登封市光大耐火材料有限公司 | High-quality high-aluminum runner brick and preparation method thereof |
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| CN101723692B (en) * | 2009-11-23 | 2012-06-27 | 上海国科化工新材料有限公司 | High strength nanophase ceramic composite insulation material and preparation method thereof |
| CN102001839A (en) * | 2010-03-29 | 2011-04-06 | 中国铁道科学研究院铁道建筑研究所 | Silica micropowder-containing concrete composite admixture and preparation method thereof |
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