CN112845630A - Online heat preservation and heat supplement method for continuous casting billet - Google Patents
Online heat preservation and heat supplement method for continuous casting billet Download PDFInfo
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- CN112845630A CN112845630A CN202011637432.5A CN202011637432A CN112845630A CN 112845630 A CN112845630 A CN 112845630A CN 202011637432 A CN202011637432 A CN 202011637432A CN 112845630 A CN112845630 A CN 112845630A
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- heat preservation
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- 238000004321 preservation Methods 0.000 title claims abstract description 101
- 238000009749 continuous casting Methods 0.000 title claims abstract description 92
- 239000013589 supplement Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 238000005266 casting Methods 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1213—Accessories for subsequent treating or working cast stock in situ for heating or insulating strands
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses an online heat preservation and heat supplement method for a continuous casting billet, which is characterized in that an online heat preservation and heat supplement system for the continuous casting billet is utilized to complete online heat preservation and heat supplement, when the system detects that the heat loss of the continuous casting billet is reduced when the continuous casting billet is conveyed on a roller way, the system controls an upper heat preservation cover and a lower heat preservation cover in the current phase to be closed, and flame sprayed by a burner installed in the heat preservation covers heats the conveyed continuous casting billet, so that the continuous casting billet can reach the rolled steel temperature after being conveyed by the roller way. The invention has the advantages that: 1) on-line heat preservation and heat supplement are carried out on the roller way in the continuous casting area, so that the full billet temperature of the continuous casting billet meets the rolling requirement, the energy is saved, and the secondary heating cost is greatly reduced; 2) the secondary heating of a heating furnace is not needed, the production flow between continuous casting and steel rolling is simplified, and the continuous casting and rolling of continuous casting billets are realized; 3) the deformation of the continuous casting billet is reduced, and the yield of the continuous casting billet is improved; 4) reduce the generation of iron oxide and collect the falling iron oxide.
Description
Technical Field
The invention relates to the field of metallurgy, in particular to an online continuous casting billet heat preservation and heat supplement method suitable for an online continuous casting billet heat preservation and heat supplement device of a continuous casting workshop of a steel plant.
Background
In the prior art, a continuous casting billet in a continuous casting workshop is subjected to hydraulic shearing or flame cutting, then is conveyed to a furnace front rack of a heating furnace through a sheared roller way, a conveying roller way and a traveling crane (or in other modes), and then enters the heating furnace to be heated and then is rolled; or the continuous casting billets are sent to a storage yard for stacking and cooling, then the cold steel billets are sent to a heating furnace when being rolled, and the cold steel billets are rolled after being heated; or a simple heat-insulating cover is placed on the upper part of the roller way for heat insulation, but the requirement of direct rolling cannot be met, the roller way can be rolled only after being heated by a heating furnace, and certain heating cost can be saved.
In the prior art, a simple heat-insulating cover is additionally arranged on a roller way in an open conveying way or on the roller way to be popularized and used in a plurality of steel plants, and the defects of large loss of steel temperature, large quantity of iron oxide scale of continuous casting billets, large energy consumption (heating of a heating furnace), incapability of achieving the purpose of directly rolling the continuous casting billets and the like exist.
At present, the electric heating and heat supplementing device is adopted, because the electric heating and heat supplementing device is installed behind a continuous casting zone roller way (the distance between the roller ways of the continuous casting zone is small, and an induction heating device cannot be arranged between the roller ways), a continuous casting blank is cooled excessively, and the induction heating device cannot completely heat the inner temperature and the outer temperature of the continuous casting blank within specified time to meet the rolling requirement.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an improved structure.
The invention is realized by the following technical scheme:
designing a continuous casting billet on-line heat preservation and heat supplement method, which is characterized in that the method is applied to a front roller way and a rear roller way or a conveying roller way of a continuous casting billet in a continuous casting area to carry out on-line heat preservation and heat supplement on the continuous casting billet, the method utilizes a continuous casting billet on-line heat preservation and heat supplement system to complete on-line heat preservation and heat supplement, the continuous casting billet 3 enters a cut roller way or a conveying roller way after being cut, the continuous casting billet 3 is conveyed on the cut roller way or the conveying roller way, the continuous casting billet can pass through the phase positions of a plurality of groups of heat preservation covers in the conveying process, an upper heat preservation cover 1 and a lower heat preservation cover 8 in each group of heat preservation covers form a relatively closed channel, when the system detects that the heat loss is reduced when the continuous casting billet 3 is conveyed on the roller way, the system controls the upper heat preservation cover 1 and the lower heat preservation cover 8 in the current phase positions to be closed, repeating a plurality of phases until the outlet by analogy, and realizing on-line heat preservation and heat supplement.
Further, the method for judging the reduction of the heat loss of the continuous casting billet comprises the steps of measuring the temperature in real time through the automatic temperature measuring module and transmitting the measured temperature to the electric control system, comparing the real-time temperature T with the initial temperature T0 through the judging module of the electric control system, and determining that the heat loss of the continuous casting billet is reduced when the real-time temperature T is smaller than the initial temperature T0.
Furthermore, the electric control system finally determines the phase position of the heat-preservation cover at the current position of the continuous casting billet through sequentially debugging the casting billet positioning detection module at each group of heat-preservation covers.
Furthermore, after the phase of the heat preservation cover at the current position of the continuous casting billet is determined, the electric control system controls the upper heat preservation cover of the heat preservation cover group to be heated in a closed mode under the driving of the upper winch driving mechanism, and the lower heat preservation cover is heated in a closed mode under the driving of the lower winch driving mechanism.
Further, the automatic temperature measuring device detects the temperature of each casting blank in real time and feeds the result back to the electric control system, and the electric control system calculates the required conveying speed, the heating time and the heating intensity according to the real-time temperature of the casting blanks and the set heating program.
Further, the control system controls the conveying speed of the roller way, the number of required heaters and the heating intensity according to a program to heat the casting blank; the automatic temperature measuring device detects the temperature of the casting blank in real time in the heating process and adjusts heating parameters to ensure that the temperature of the casting blank reaches the set rolling temperature; and after heating, the casting blank is conveyed to a rolling mill for rolling through a hot roller conveying way.
Further, the automatic temperature measuring device detects the temperature of the casting blank in real time in the heating process and adjusts heating parameters to ensure that the temperature of the casting blank reaches the set rolling temperature.
Furthermore, the burners are oxygen-enriched burners, one group of burners is arranged every 0.1-1 meter, and the number of the burners can be correspondingly adjusted according to the length of the roller way and the heat loss condition.
Furthermore, the heat-insulating layer is made of casting materials or refractory fibers. The heat preservation rate and the temperature reduction speed are as follows.
Furthermore, the section of the upper heat-insulating cover is in a door frame shape or a moon door shape; the cross section of the lower heat-insulating cover is in an inverted trapezoid shape.
The invention has the beneficial effects that:
1) on-line heat preservation and heat supplement are carried out on the roller way in the continuous casting area, so that the full billet temperature of the continuous casting billet meets the rolling requirement, the energy is saved, and the secondary heating cost is greatly reduced;
2) the secondary heating of a heating furnace is not needed, the production flow between continuous casting and steel rolling is simplified, and the continuous casting and rolling of continuous casting billets are realized;
3) the deformation of the continuous casting billet is reduced, and the yield of the continuous casting billet is improved;
4) reduce the generation of iron oxide and collect the falling iron oxide.
Drawings
FIG. 1 is a block diagram of a system of the present invention;
FIG. 2 is a flow chart of the system of the present invention;
FIG. 3 is a schematic cross-sectional view of the present invention;
FIG. 4 is a schematic side view of a partial structure of the present invention;
parts are labeled in the figures:
1. the device comprises an upper heat-preservation cover, 2 burners, 3 continuous casting billets, 4 rollers, 5 roll shafts, 6 flanges, 7 collecting ports, 8 lower heat-preservation covers, 9 inner layers, 10 enclosers and 11 grooves.
Detailed Description
The invention will be further explained with reference to the drawings.
Example one
An on-line heat preservation and heat supplement system for a continuous casting billet 3,
the system part comprises an electrical control system, an automatic temperature measurement module, a judgment module, a casting blank positioning detection module, an upper hoisting driving mechanism, a lower hoisting driving mechanism and a calculation module, wherein the casting blank positioning detection module is arranged at each group of heat preservation covers, the upper hoisting driving mechanism is in driving connection with the upper heat preservation cover, and the lower hoisting driving mechanism is in driving connection with the lower heat preservation cover, as shown in fig. 2.
The device part comprises a roller way and a plurality of groups of heat preservation covers which are sequentially and continuously arranged along the direction of the roller way as shown in figures 3 and 4. Every group heat preservation cover includes heat preservation cover 1, heat preservation cover 8 down, goes up heat preservation cover 1, heat preservation cover 8 skin is encloser 10 down, and inlayer 9 is the heat preservation, the material of heat preservation is castables or refractory fiber, goes up heat preservation cover 1 and places on roller table upper portion, and heat preservation cover 8 is fixed in the roller table lower part down to the border of going up heat preservation cover 1 and heat preservation cover 8 down is opened and is had the recess 11 with roller 5 assorted on the roller table, makes heat preservation cover 1, heat preservation cover 8 down surround the roller table completely, forms a relative confined passageway. The section of the upper heat-insulating cover 1 is in a doorframe shape or a moon door shape and is suitable for continuous casting billets 3 with different thicknesses, the section of the lower heat-insulating cover 8 is in an inverted trapezoid shape, a collecting opening 7 is formed in the bottom of the lower heat-insulating cover, and a cover plate is arranged outside the collecting opening 7.
A plurality of groups of burners 2 are arranged in the upper heat-insulating cover 1 and the lower heat-insulating cover 8, the burners 2 are arranged at the top and two sides of the upper heat-insulating cover 1 and at the two sides and bottom of the lower heat-insulating cover 8, and the burners 2 are arranged in one group at intervals of 0.1-1 meter; the combustor adopts an oxygen-enriched combustor.
And the two sides of the roller 4 on the roller way are provided with the flanges 6, so that when the roller 4 bears and transports the continuous casting billet 3, the continuous casting billet 3 is guided, the deviation and the deformation of the continuous casting billet 3 are reduced, and the yield of the continuous casting billet 3 is improved.
Get into after cutting roll table or rollgang after continuous casting billet 3 cuts, go up heat preservation cover 1, heat preservation cover 8 forms a relative confined passageway down, and continuous casting billet 3 calorific loss reduces when carrying on the roll table, and 2 spun flames of combustor 2 of installation in last heat preservation cover 1, heat preservation cover 8 down simultaneously heat continuous casting billet 3 of carrying, make continuous casting billet 3 can reach rolling steel temperature after the roll table is carried.
Example two
An online heat preservation and heat supplement method for a continuous casting billet is applied to a front roller way and a rear roller way or a conveying roller way of a continuous casting zone to carry out online heat preservation and heat supplement on the continuous casting billet, the method utilizes an online heat preservation and heat supplement system for the continuous casting billet to complete online heat preservation and heat supplement, the continuous casting billet 3 enters a roller way or a conveying roller way after being cut, the continuous casting billet 3 is conveyed on the roller way or the conveying roller way after being cut, the continuous casting billet can pass through the phase positions of a plurality of groups of heat preservation covers in the conveying process, an upper heat preservation cover 1 and a lower heat preservation cover 8 in each group of heat preservation covers form a relatively closed channel, when the system detects that the heat loss is reduced when the continuous casting billet 3 is conveyed on the roller way, the system controls the upper heat preservation cover 1 and the lower heat preservation cover 8 in the current phase positions to be closed, and flames sprayed by a burner 2 installed in the heat, repeating a plurality of phases until the outlet by analogy, and realizing on-line heat preservation and heat supplement.
S1, the judgment method for the reduction of the heat loss of the continuous casting billet comprises the steps of measuring the temperature in real time through the automatic temperature measuring module and transmitting the measured temperature to the electric control system, comparing the real-time temperature T with the initial temperature T0 through the judgment module of the electric control system, and determining that the heat loss of the continuous casting billet is reduced when the real-time temperature T is smaller than the initial temperature T0.
And S2, the electric control system finally determines the phase position of the heat-preservation cover at the current position of the continuous casting billet by sequentially debugging the casting billet positioning detection modules at each group of heat-preservation covers.
And S3, after the phase of the heat preservation cover at the current position of the continuous casting billet is determined, the electric control system controls the upper heat preservation cover of the group of heat preservation covers to be heated in a closed manner under the driving of the upper winch driving mechanism, and the lower heat preservation cover is heated in a closed manner under the driving of the lower winch driving mechanism.
And S4, detecting the temperature of each casting blank in real time by the automatic temperature measuring device, feeding the result back to the electric control system, and calculating the required conveying speed, heating time and heating intensity by the electric control system according to the real-time temperature of the casting blank and the set heating program.
S5, controlling the conveying speed of the roller way, the number of required heaters and the heating intensity by the control system according to a program, and heating the casting blank; the automatic temperature measuring device detects the temperature of the casting blank in real time in the heating process and adjusts heating parameters to ensure that the temperature of the casting blank reaches the set rolling temperature; and after heating, the casting blank is conveyed to a rolling mill for rolling through a hot roller conveying way.
And S6, detecting the temperature of the casting blank in real time by the automatic temperature measuring device in the heating process and adjusting heating parameters to ensure that the temperature of the casting blank reaches the set rolling temperature.
The present invention has been described in terms of the above embodiments, and it should be understood that the above embodiments are not intended to limit the present invention in any way, and all technical solutions obtained by using equivalents or equivalent changes fall within the protection scope of the present invention.
Claims (10)
1. An online heat preservation and heat supplement method for a continuous casting billet is characterized in that the online heat preservation and heat supplement method is applied to a front roller way and a rear roller way or a conveying roller way of a continuous casting billet area to carry out online heat preservation and heat supplement on the continuous casting billet, an online heat preservation and heat supplement system for the continuous casting billet is utilized to complete online heat preservation and heat supplement, the continuous casting billet (3) enters a cut roller way or a conveying roller way after being cut, the continuous casting billet (3) is conveyed on the cut roller way or the conveying roller way and passes through the phase positions of a plurality of groups of heat preservation covers in the conveying process, an upper heat preservation cover (1) and a lower heat preservation cover (8) in each group of heat preservation covers form a relatively closed channel, when the system detects that the heat loss of the continuous casting billet (3) is reduced during conveying on the roller way, the system controls the upper heat preservation cover (1) and the lower heat preservation cover (8) in the current phase positions to be, the continuous casting billet (3) can reach the temperature of rolled steel after being conveyed by a roller way, and the continuous casting billet is repeated for a plurality of phases until reaching an outlet by analogy, so that the online heat preservation and heat supplement are realized.
2. The on-line heat preservation and heat supplement method for the continuous casting billet as claimed in claim 1, wherein the judgment method for the continuous casting billet heat loss reduction is that the real-time temperature measurement is transmitted to the electrical control system through the automatic temperature measurement module, the judgment module of the electrical control system compares the real-time temperature T with the initial temperature T0, and when the real-time temperature T is less than the initial temperature T0, the continuous casting billet heat loss reduction is determined.
3. The on-line continuous casting billet heat preservation and heat supplement method according to claim 1, wherein the electrical control system finally determines the phase position of the heat preservation cover at the current position of the continuous casting billet by debugging the casting billet positioning detection module at each group of heat preservation covers in sequence.
4. The on-line continuous casting billet heat preservation and heat supplement method according to claim 3, wherein after the phase of the heat preservation cover at the current position of the continuous casting billet is determined, the electrical control system controls the upper heat preservation cover of the group of heat preservation covers to be closed and heated under the driving of the upper hoisting driving mechanism, and the lower heat preservation cover to be closed and heated under the driving of the lower hoisting driving mechanism.
5. The on-line continuous casting billet heat preservation and heat supplement method as claimed in claim 1 or 2, wherein the automatic temperature measuring device detects the temperature of each billet in real time and feeds the result back to the electric control system, and the electric control system calculates the required conveying speed, heating time and heating intensity according to the real-time temperature of the billet and the set heating program.
6. The on-line continuous casting billet heat preservation and heat supplement method according to claim 5, characterized in that a control system controls the conveying speed of a roller way, the number of required heaters and the heating intensity according to a program to heat a casting billet; the automatic temperature measuring device detects the temperature of the casting blank in real time in the heating process and adjusts heating parameters to ensure that the temperature of the casting blank reaches the set rolling temperature; and after heating, the casting blank is conveyed to a rolling mill for rolling through a hot roller conveying way.
7. The on-line continuous casting billet heat preservation and heat supplement method as claimed in claim 1, wherein an automatic temperature measuring device detects the temperature of the casting billet in real time during heating and adjusts heating parameters to ensure that the temperature of the casting billet reaches the set rolling temperature.
8. The on-line heat preservation and heat supplement method for the continuous casting billet as claimed in claim 1, wherein the burners are oxygen-enriched burners, one group of burners is arranged every 0.1-1 m, and the number of the burners can be correspondingly adjusted according to the length of a roller way and the heat loss condition.
9. The on-line continuous casting billet heat preservation and heat supplement method as claimed in claim 2, wherein the heat preservation layer is made of casting material or refractory fiber. The heat preservation rate and the temperature reduction speed are as follows.
10. The on-line heat preservation and heat supplement method for the continuous casting billet as claimed in claim 1, wherein the cross section of the upper heat preservation cover is in a shape of a door frame or a moon door; the cross section of the lower heat-insulating cover is in an inverted trapezoid shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011637432.5A CN112845630A (en) | 2020-12-31 | 2020-12-31 | Online heat preservation and heat supplement method for continuous casting billet |
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| CN202011637432.5A CN112845630A (en) | 2020-12-31 | 2020-12-31 | Online heat preservation and heat supplement method for continuous casting billet |
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| CN109108073A (en) * | 2018-08-31 | 2019-01-01 | 东北大学 | A kind of red base of continuous casting directly rolls heat patching device and method |
| CN110421002A (en) * | 2019-07-08 | 2019-11-08 | 江苏煌明能源科技有限公司 | Bar Wire Product is without heating furnace continuous casting direct-rolling process |
| CN111438188A (en) * | 2020-03-27 | 2020-07-24 | 中冶赛迪工程技术股份有限公司 | Long material direct rolling casting blank heat preservation device, production line and method |
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2020
- 2020-12-31 CN CN202011637432.5A patent/CN112845630A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202238896U (en) * | 2011-09-13 | 2012-05-30 | 宝山钢铁股份有限公司 | Roller preheating device |
| CN103464463A (en) * | 2013-09-26 | 2013-12-25 | 湖北中钢联冶金工程有限公司 | Continuous-casting and continuous-rolling integrating device and process |
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