CN102776345B - Method for controlling nodulation of carbon sleeve roller of strip steel continuous annealing furnace - Google Patents
Method for controlling nodulation of carbon sleeve roller of strip steel continuous annealing furnace Download PDFInfo
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- CN102776345B CN102776345B CN 201110118794 CN201110118794A CN102776345B CN 102776345 B CN102776345 B CN 102776345B CN 201110118794 CN201110118794 CN 201110118794 CN 201110118794 A CN201110118794 A CN 201110118794A CN 102776345 B CN102776345 B CN 102776345B
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- sleeve roller
- carbon sleeve
- roller
- steel
- nacl
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 51
- 238000000137 annealing Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000024121 nodulation Effects 0.000 title abstract 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 43
- 239000011780 sodium chloride Substances 0.000 claims abstract description 18
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 9
- 239000010439 graphite Substances 0.000 claims abstract description 9
- 239000007864 aqueous solution Substances 0.000 claims abstract description 8
- 239000011148 porous material Substances 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- 239000007921 spray Substances 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 6
- 239000003595 mist Substances 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000000227 grinding Methods 0.000 abstract description 4
- 238000005461 lubrication Methods 0.000 abstract description 2
- 238000010977 unit operation Methods 0.000 abstract description 2
- 230000001680 brushing effect Effects 0.000 abstract 2
- 238000001035 drying Methods 0.000 abstract 2
- 238000005507 spraying Methods 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000005097 cold rolling Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 206010067482 No adverse event Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention provides a method for controlling panel strip steel continuous annealing furnace carbon sleeve roller nodulation, after cleaning and drying the surface of a steel strip, spraying or coating a saturated NaCl aqueous solution with the temperature of 50-100 ℃ on one surface contacting with a furnace roller, drying, and annealing according to a conventional process, so that tiny molten liquid drop-shaped NaCl is uniformly filled in tiny pores generated at the high temperature of a graphite carbon sleeve roller; and after the steel strip is taken out of the furnace, carrying out dry brushing or spraying, brushing and cleaning operations on the surface of the steel strip. NaCl plays a role in lubrication, reduces the friction between a steel belt and a carbon sleeve roller, fills micro pores on the surface of the carbon sleeve roller, and plays a role in preventing and controlling nodulation on the surface of the carbon sleeve roller, so that the replacement period of the carbon sleeve roller can be prolonged by more than one time, the defects of scratches and punch marks on the surface of the steel belt are greatly reduced, the surface quality of a steel plate is improved, the times of grinding rollers are reduced, the cost of spare parts and the production cost are reduced, and the product yield and the unit operation rate are improved.
Description
Technical field
The invention belongs to the steel rolling process technical field, particularly a kind of method of the interior carbon cover of stove roller dross in prevention and control cold rolled sheet steel continuous annealing process.
Background technology
Development along with national economy, demand to cold-rolled plate and strip increases day by day, particularly auto sheet and cold rolling electrical steel product, and this series products generally adopts continuous annealing furnace to carry out high efficiency production in process of production, surface quality is excellent to obtain, the uniform Strip product of performance.
Because graphite carbon sleeve furnace roller (carbon cover roller) can keep enough intensity in high-temperature service, has good wear resistance at elevated temperature, and do not damage the surface quality of steel band, therefore the continuous annealing furnace of each cold rolling mill all adopts carbon cover roller to carry out transmission and the conveying of steel band in stove at present.
Yet, in the long-term production use procedure, owing to existing friction, collision between carbon cover roller and steel band, can adhere to or pile up dirt, iron filings and the iron sheet that steel band brings in carbon cover roller surface and micropore, under high tepid state sintering, grow up, form the hard projection, cause carbon cover roller dross.Knob can come off in friction and collision or in the grinding roller processing, but can form in position larger space or dross substrate, and further causes the aggravation of knob to grow up.And the variation of furnace atmosphere in heat treatment process, to adjust the frequent use of material and the difference of steel band and furnace roller travelling speed etc. in producing be all the important factor of impelling the dross generation and growing up.
In case carbon cover roller dross will cause the steel strip surface that is in contact with it to scratch in heat treatment process, produces point-like and presses against seal, has a strong impact on the quality of finished product steel belt.The phenomenon that stops production because of carbon cover roller dross in production process is not rarely seen, and adjust the repeatedly use of material along with grinding roller, carbon cover roller condition of surface also worsens increasingly, causes and produces the just necessary blowing out roll change of one section all after date, and need for a long time carbon cover roller to be heat-treated.The carbon cover furnace roller quantity used of continuous annealing furnace is many in addition, reaches nearly 200, therefore not only increased workload and the maintenance cost of roll change, and the replacement cost of carbon cover roller is very high.
Summary of the invention
The object of the present invention is to provide a kind of simplely, convenient operation can effectively prevent and reduce carbon cover roller surface cord, extends carbon cover roller life cycle, improves the control method of the Strip continuous annealing furnace carbon cover roller dross of plate surface quality and production efficiency.
For this reason, the solution taked of the present invention is:
A kind of method of switchboard continuous strip annealing furnace carbon cover roller dross is characterized in that:
After the steel strip surface that needs continuous annealing is carried out the normal wash oven dry, steel band contact furnace roller simultaneously spray or application temperature at the saturated NaCl aqueous solution of 50-100 ℃, after spray or coating, row oven dry again, make the NaCl crystal be attached to scraggly steel strip surface with the micro mist shape;
Carry out anneal according to common process, make the NaCl that is small molten melt drop shape under high temperature stick to carbon cover roller surface in steel band and carbon cover roller contact process, and in the micro-pore that produces under graphite carbon sleeve roller high temperature of uniform filling;
After steel band is come out of the stove, as required steel strip surface is done brush or flux spray, scrubbed and cleaning operation.
Described NaCl is the high purity N aCl of 800.7 ℃ of fusing points, 1465 ℃ of boiling points.
Beneficial effect of the present invention is:
Carry out at needs due to the present invention being coated with the NaCl aqueous solution on the strip of continuous annealing, not only played lubrication between steel band and carbon cover roller, reduced frictional force between steel band and carbon cover roller, and the NaCl of molten melt drop shape understands the micro-pore on carbon cover roller surface under the filled high-temperature state, played prevention and controlled the effect that carbon overlaps the roller surface cord, thereby can extend the carbon cover roller replacement cycle more than one times, greatly reduce steel strip surface and scratch and press against the seal defective, improve the surface quality of finished steel plate.Simultaneously, can obviously reduce the grinding roller number of times, reduce spare part expense and production cost, improve product lumber recovery and unit operation rate.The present invention is simple, and convenient operation and control need not to change original production technique, just can be instantaneous results.High purity N aCl physics used in the present invention and stable chemical performance, nontoxic pollution-free, possess the fusing point and the boiling point that adapt with thermal treatment temp, both be convenient to coat operations, and be easy to again use and clean, and water soluble, coordinate with the continuous annealing furnace atmosphere, without any untoward reaction.Especially be fit to the annealing production application of cold rolling electric.
Embodiment
Embodiment 1:
The cold rolling electric treatment production adopts the horizontal type multi-function continuous annealing furnace.
At first, be ready to 800.7 ℃ of fusing points, the high purity N aCl that boiling point is 1465 ℃, pollution-free to steel band and the whole facility of stove to guarantee to be suitable for the cold rolling electric as-heat-treated condition, have no adverse reaction with atmosphere in stove, and molten and water.It is the saturated NaCl aqueous solution of 60 ℃ that water is in harmonious proportion to temperature, and consumption can be adjusted according to water temperature.
According to normal process, steel strip surface is cleaned, after washing, steel strip surface is dried.
With the one side that the saturated NaCl aqueous solution of 60 ℃ of getting ready evenly applies or spray overlaps roller at steel band contact carbon.Dry again after being coated with, the NaCl crystal after oven dry is attached in the convex-concave hole of steel strip surface with the micro mist shape.
Steel band after oven dry is sent into continuous annealing furnace, and the NaCl of steel strip surface is small molten melt drop shape under furnace high-temperature, sticks to carbon cover roller surperficial in steel band and carbon cover roller contact process, and at steel band and the surperficial lubricate of furnace roller.The NaCl molten melt drop that adheres on carbon cover roller will be filled in the micro-pore that produces under graphite high temperature, and in minimizing steel band and carbon cover roller frictional force, it is surperficial that isolated other material adheres to carbon cover roller.Produce by normally carrying out and controlling in continuous annealing furnace.
After steel band was come out of the stove, cooled NaCl was attached to steel strip surface with micro mist shape crystal again, as required steel strip surface was done brush or water spray, was scrubbed and cleaning operation.
Embodiment 2:
The cold rolling electric treatment production adopts the horizontal type multi-function continuous annealing furnace.
At first, be ready to 800.7 ℃ of fusing points, it is the saturated NaCl aqueous solution of 85 ℃ that the high purity N aCl that boiling point is 1465 ℃, water are in harmonious proportion to temperature, and consumption can be adjusted according to water temperature.
According to normal process, steel strip surface is cleaned, after washing, steel strip surface is dried.
With the one side that the saturated NaCl aqueous solution of 85 ℃ of getting ready evenly applies or spray overlaps roller at steel band contact carbon.Dry again after being coated with, the NaCl crystal after oven dry is attached in the convex-concave hole of steel strip surface with the micro mist shape.
Steel band after oven dry is sent into continuous annealing furnace, and the NaCl of steel strip surface is small molten melt drop shape under furnace high-temperature, sticks to carbon cover roller surperficial in steel band and carbon cover roller contact process, and at steel band and the surperficial lubricate of furnace roller.The NaCl molten melt drop that adheres on carbon cover roller will be filled in the micro-pore that produces under graphite high temperature, and in minimizing steel band and carbon cover roller frictional force, it is surperficial that isolated other material adheres to carbon cover roller.Produce by normally carrying out and controlling in continuous annealing furnace.
After steel band was come out of the stove, cooled NaCl was attached to steel strip surface with micro mist shape crystal again, as required steel strip surface was done brush or water spray, was scrubbed and cleaning operation.
Claims (2)
1. the method for switchboard continuous strip annealing furnace carbon cover roller dross is characterized in that:
After the steel strip surface that needs continuous annealing is carried out the normal wash oven dry, steel band contact graphite carbon sleeve roller simultaneously spray or application temperature at the saturated NaCl aqueous solution of 50-100 ℃, dry again after spray or coating, make the NaCl crystal be attached to scraggly steel strip surface with the micro mist shape;
Carry out anneal according to common process, make the NaCl that is small molten melt drop shape under high temperature stick to graphite carbon sleeve roller surface in steel band and graphite carbon sleeve roller contact process, and in the micro-pore that produces under graphite carbon sleeve roller high temperature of uniform filling;
After steel band is come out of the stove, as required steel strip surface is done brush or solvent spray, scrubbed and cleaning operation.
2. the method for switchboard continuous strip annealing furnace carbon cover roller dross according to claim 1, is characterized in that, described NaCl is the high purity N aCl of 800.7 ℃ of fusing points, 1465 ℃ of boiling points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110118794 CN102776345B (en) | 2011-05-10 | 2011-05-10 | Method for controlling nodulation of carbon sleeve roller of strip steel continuous annealing furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110118794 CN102776345B (en) | 2011-05-10 | 2011-05-10 | Method for controlling nodulation of carbon sleeve roller of strip steel continuous annealing furnace |
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| CN102776345A CN102776345A (en) | 2012-11-14 |
| CN102776345B true CN102776345B (en) | 2013-11-06 |
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| CN103290200B (en) * | 2013-06-18 | 2015-01-28 | 北京首钢股份有限公司 | Method for treating accretions of roller with carbon sleeve for continuous annealing furnace |
| CN104177097B (en) * | 2014-08-12 | 2015-12-09 | 杨清泉 | A kind of corrosion-resisting wear-proof continuous annealing line special graphite carbon cover roller and manufacturing process thereof |
| CN108857688B (en) * | 2018-06-27 | 2019-12-10 | 湖北红业建材科技开发有限公司 | Online graphite carbon sleeve tumor removing device and method |
| CN110724812B (en) * | 2019-10-10 | 2021-03-09 | 邯郸钢铁集团有限责任公司 | Method for eliminating furnace roller indentation defect of continuous annealing furnace |
| CN111100972B (en) * | 2020-02-26 | 2021-12-31 | 江苏省沙钢钢铁研究院有限公司 | Method for preventing carbon sleeve roller of continuous annealing furnace from nodulation |
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| CN101906529B (en) * | 2009-06-08 | 2012-11-28 | 鞍钢股份有限公司 | Control and treatment method for carbon sleeve furnace bottom roller accretion |
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