CN108080416A - A kind of compact medium-width strip steel production process - Google Patents

A kind of compact medium-width strip steel production process Download PDF

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Publication number
CN108080416A
CN108080416A CN201711453871.9A CN201711453871A CN108080416A CN 108080416 A CN108080416 A CN 108080416A CN 201711453871 A CN201711453871 A CN 201711453871A CN 108080416 A CN108080416 A CN 108080416A
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CN
China
Prior art keywords
strand
temperature
steel
width strip
strip steel
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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CN201711453871.9A
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Chinese (zh)
Inventor
王兵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chuzhou Bao Dao Special Cold Rolling Strip Steel Co Ltd
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Chuzhou Bao Dao Special Cold Rolling Strip Steel Co Ltd
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Priority to CN201711453871.9A priority Critical patent/CN108080416A/en
Publication of CN108080416A publication Critical patent/CN108080416A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/46Metal-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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/06Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08Iron or steel

Abstract

The invention discloses a kind of compact medium-width strip steel production process, include the following steps:S1, desulfurizing agent is added on molten iron face, gas is blown by the ventilative chock plug for being mounted in ladle bottom, agitation molten iron carries out desulfurization, molten iron is blended into converter or electric furnace smelting afterwards;S2, steel ladle are hoisted to liquid steel refining stove, heat molten steel and alloy fine tuning ingredient, make the temperature of molten steel and ingredient uniform, to be further reduced field trash, after regulation requirement to be achieved;S3, tundish is preheated, molten steel is then poured into tundish by 1200~1250 DEG C of preheating temperature, and controlling the degree of superheat, middle water containing opening is assigned in each crystallizer for 20~60 DEG C;A kind of compact medium-width strip steel production process provided by the invention, each process compact and reasonable of configuration, logistics is smooth, and Temperature Matching is suitable, reduces the subsequent processing operations and cost of product, improves product quality, energy saving, meets energy-saving state basic policy.

Description

A kind of compact medium-width strip steel production process
Technical field
The invention belongs to technical field of steel strip production more particularly to a kind of compact medium-width strip steel production process.
Background technology
At present, domestic strip production status is substantially that broadband steel continuous rolling mill and narrowband steel continuous rolling mill are in the majority, and in partially The compact continuous casting and rolling production line or blank of wide flat steel.For the strip that width is 600~1300mm, market demand is not It is small, and existing ribbon steel production line does not produce, and due to wide flat steel production line is technology and economically, and is unwilling to give birth to Production, is also not suitable for producing.Conventional plate blank conticaster has production product with hot-continuous-rolling strip steel milling train for producing the technique with coil of strip The advantages of kind is complete, production scale is big, but since conticaster radius is big, and with multi rack roughing mill so that total system equipment weight Amount is big, produces line length, and plant area is big, and investment is big.Larger intermediate slab is needed between conticaster and roll line simultaneously Storehouse buffers, and adds investment.The average charging temperature of continuous casting billet is only 500~600 DEG C, even hot charging, hot charging rate is put down Only it is 65% or so, energy-saving effect unobvious.Slab is more in roughing area rolling pass, and the time is long, and slab thermal loss is big, needs There is higher tapping temperature, while in order to compensate for intermediate base head and tail temperature difference, mm finishing mill unit must use increasing speed rolling, it is desirable that electricity Machine capacity is larger, and the plate shape of product is difficult to control.
The content of the invention
The purpose of the present invention is to solve shortcoming in the prior art, and a kind of compact medium-width strip steel proposed Production technology.
To achieve the above object, the present invention provides following technical solution:
A kind of compact medium-width strip steel production process, includes the following steps:
S1, desulfurizing agent is added on molten iron face, gas is blown by the ventilative chock plug for being mounted in ladle bottom, agitation molten iron carries out Molten iron is blended into converter or electric furnace smelting by desulfurization afterwards;
S2, steel ladle are hoisted to liquid steel refining stove, heat molten steel and alloy fine tuning ingredient, make the temperature of molten steel and ingredient uniform, To be further reduced field trash, after regulation requirement to be achieved, according to process time rhythm demand, by steel ladle handling to conticaster Bale panoramic tables on;
S3, tundish is preheated, molten steel is then poured into tundish by 1200~1250 DEG C of preheating temperature, controls the degree of superheat For 20~60 DEG C, middle water containing opening is assigned in each crystallizer, and thickness is poured into a manner of totally-enclosed as 100~160mm, width Spend thin plate strand in the zero defect for being 9000~15600mm for 600~1300mm, length;
S4, the strand obtained in S3 is solidified, casting blank solidification process uses two device for cooling, is equipped in two device for cooling close The guide roller of collection, to control the bulge problem of strand;
S5, the strand obtained in S4 is drawn out to by conticaster by withdrawal straightening machine, for prevent base bulge and reduce aligning when strand in The distortional stress in portion, the withdrawal straightening machine at least needs 20 pairs of pulling-straightening rollers, and is designed to multipoint straightening or continuous straightening, and strand goes out to connect The mean temperature of casting machine is 920~950 DEG C;
S6, strand is transported to heating furnace heats, the heat treatment temperature of selection is less than overlay coating
Recrystallization temperature and sinking higher than the compound formed by nonmetalloid and overlay coating metal being deposited on crystal boundary Accumulated temperature degree, pre- precision processing layer are by diffusion annealing, and a disperse coating is covered with after the pre- precision processing layer of diffusion annealing and is connect It and is covered with an overlay coating, overlay coating passes through the embrittlement that is heat-treated according to the nonmetallic ingredient of filling to have target;
It S7 and then is conveyed by walking beam, strand is made to be heated in advance, when strand temperature is heated to 1150~1250 DEG C When, it is uniform to reach surface and the core temperature of strand, and extractor send strand picking-up to delivery roller table outside stove;
S8, strand crush the oxide of belt steel surface using planisher, are removed after being rolled in line six-high cluster mill, Scrubbing roller in brushing device removes the oxide that casting billet surface comes off and loosens, and tension straingtening and broken phosphorus, warp are carried out to strand After the broken phosphorus of overstretching aligning, Shot Blasting is carried out to strand, the Shot Blasting is the mud injection mixed using water and abrasive material, After Shot Blasting, scrub is ground using scrubbing unit to strand;
S9, smooth, aligning will be passed through and scrub treated strand carries out pickling, the temperature of pickle is set as 20-70 DEG C Under the conditions of carry out 1-30 seconds, to the strand after pickling by polishing scrub after, strand is dried;
S10 and then warm-rolling is carried out under the conditions of nitrogen atmosphere, start rolling temperature is 500~550 DEG C, and finishing temperature is 380~450 DEG C, overall reduction is 40~50%, obtains warm-rolling band;
S11, by warm-rolling band removing iron scale, subsequent strand enters roughing mill and back and forth rolls 3-4 passages, obtain among base, intermediate base 7-8 passages are continuously rolled into finishing mill, obtain finished product.
Preferably, in the step S5 conticaster section be 1600mm × 230mm, casting machine conical degree of crystallizer for 1.1 to 1.4%/m, casting machine pulling rate are 1.0 to 1.4m/min, and crystallizer is parallel-plate straight mo(u)ld.
Preferably, the secondary cooling in the step S4 cools down for aerosol, by two-stage computer control.
Preferably, among the step S11 base after finishing rolling step comes out, carry out thermometric, survey it is wide, survey convexity, survey it is straight Degree and Thickness Measurement by Microwave.
Preferably, 3~5 block casting base rooms are set as breeze way in the step S6 heating stove heat soaking pit, to reach It is 18~30 minutes to buffer time, after being heat-fed immediately to heater for rolling steel stove and is pushed into heating stove heat, makes full use of just The continuous casting steel billet waste heat produced, 500 DEG C~850 DEG C of core temperature, 400 DEG C~750 DEG C of surface temperature is quick to heat, not only Mill coil production capacity can be improved, the continuous casting steel billet bulk temperature after heating can also be made more uniform, established for stable rolling Basis is determined, the Secondary Transport and the part Repeat-heating by room temperature to tapping temperature for avoiding continuous casting steel billet are significantly saved The raw material transportation cost and heating cost of mill coil production.
The technique effect and advantage of the present invention:A kind of compact medium-width strip steel production process provided by the invention, mechanically Broken phosphorus, phosphorus removal functional finally carry out oxide removing to belt steel surface using brushing device, facilitate acid solution rapid osmotic, promoted Pickling efficiency, each process compact and reasonable of configuration, logistics is smooth, and Temperature Matching is suitable, reduces the subsequent processing operations of product And cost, product quality is improved, it is energy saving, meet energy-saving state basic policy.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with specific embodiment, to this Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not For limiting the present invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not before creative work is made All other embodiments obtained are put, belong to the scope of protection of the invention.
A kind of compact medium-width strip steel production process, includes the following steps:
S1, desulfurizing agent is added on molten iron face, gas is blown by the ventilative chock plug for being mounted in ladle bottom, agitation molten iron carries out Molten iron is blended into converter or electric furnace smelting by desulfurization afterwards;
S2, steel ladle are hoisted to liquid steel refining stove, heat molten steel and alloy fine tuning ingredient, make the temperature of molten steel and ingredient uniform, To be further reduced field trash, after regulation requirement to be achieved, according to process time rhythm demand, by steel ladle handling to conticaster Bale panoramic tables on;
S3, tundish is preheated, molten steel is then poured into tundish by 1200~1250 DEG C of preheating temperature, controls the degree of superheat For 20~60 DEG C, middle water containing opening is assigned in each crystallizer, and thickness is poured into a manner of totally-enclosed as 100~160mm, width Spend thin plate strand in the zero defect for being 9000~15600mm for 600~1300mm, length;
S4, the strand obtained in S3 is solidified, casting blank solidification process uses two device for cooling, is equipped in two device for cooling close The guide roller of collection, to control the bulge problem of strand;
S5, the strand obtained in S4 is drawn out to by conticaster by withdrawal straightening machine, for prevent base bulge and reduce aligning when strand in The distortional stress in portion, the withdrawal straightening machine at least needs 20 pairs of pulling-straightening rollers, and is designed to multipoint straightening or continuous straightening, and strand goes out to connect The mean temperature of casting machine is 920~950 DEG C;
S6, strand is transported to heating furnace heats, the heat treatment temperature of selection is less than overlay coating
Recrystallization temperature and sinking higher than the compound formed by nonmetalloid and overlay coating metal being deposited on crystal boundary Accumulated temperature degree, pre- precision processing layer are by diffusion annealing, and a disperse coating is covered with after the pre- precision processing layer of diffusion annealing and is connect It and is covered with an overlay coating, overlay coating passes through the embrittlement that is heat-treated according to the nonmetallic ingredient of filling to have target;
It S7 and then is conveyed by walking beam, strand is made to be heated in advance, when strand temperature is heated to 1150~1250 DEG C When, it is uniform to reach surface and the core temperature of strand, and extractor send strand picking-up to delivery roller table outside stove;
S8, strand crush the oxide of belt steel surface using planisher, are removed after being rolled in line six-high cluster mill, Scrubbing roller in brushing device removes the oxide that casting billet surface comes off and loosens, and tension straingtening and broken phosphorus, warp are carried out to strand After the broken phosphorus of overstretching aligning, Shot Blasting is carried out to strand, the Shot Blasting is the mud injection mixed using water and abrasive material, After Shot Blasting, scrub is ground using scrubbing unit to strand;
S9, smooth, aligning will be passed through and scrub treated strand carries out pickling, the temperature of pickle is set as 20-70 DEG C Under the conditions of carry out 1-30 seconds, to the strand after pickling by polishing scrub after, strand is dried;
S10 and then warm-rolling is carried out under the conditions of nitrogen atmosphere, start rolling temperature is 500~550 DEG C, and finishing temperature is 380~450 DEG C, overall reduction is 40~50%, obtains warm-rolling band;
S11, by warm-rolling band removing iron scale, subsequent strand enters roughing mill and back and forth rolls 3-4 passages, obtain among base, intermediate base 7-8 passages are continuously rolled into finishing mill, obtain finished product.
Conticaster section is 1600mm × 230mm in the step S5, and casting machine conical degree of crystallizer is 1.1 to 1.4%/m, casting Machine pulling rate is 1.0 to 1.4m/min, and crystallizer is parallel-plate straight mo(u)ld.
Secondary cooling in the step S4 cools down for aerosol, by two-stage computer control.
Base carries out thermometric, surveys width, survey convexity, survey glacing flatness and thickness measuring after finishing rolling step comes out among the step S11 Degree.
3~5 block casting base rooms are set as breeze way, during reaching buffering in step S6 heating stove heat soaking pit Between be 18~30 minutes.
In summary:A kind of compact medium-width strip steel production process provided by the invention, mechanically broken phosphorus, phosphorus removal functional, Oxide removing finally is carried out to belt steel surface using brushing device, facilitates acid solution rapid osmotic, promotes pickling efficiency, configuration Each process compact and reasonable, logistics is smooth, and Temperature Matching is suitable, reduces the subsequent processing operations and cost of product, improves product Quality, it is energy saving, meet energy-saving state basic policy.
Finally it should be noted that:The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, although The present invention is described in detail with reference to the foregoing embodiments, it for those skilled in the art, still can be right Technical solution recorded in foregoing embodiments modify or to which part technical characteristic carry out equivalent substitution, it is all Within the spirit and principles in the present invention, any modifications, equivalent replacements and improvements are made should be included in the protection of the present invention Within the scope of.

Claims (5)

1. a kind of compact medium-width strip steel production process, it is characterised in that:Include the following steps:
S1, desulfurizing agent is added on molten iron face, gas is blown by the ventilative chock plug for being mounted in ladle bottom, agitation molten iron carries out Molten iron is blended into converter or electric furnace smelting by desulfurization afterwards;
S2, steel ladle are hoisted to liquid steel refining stove, heat molten steel and alloy fine tuning ingredient, make the temperature of molten steel and ingredient uniform, To be further reduced field trash, after regulation requirement to be achieved, according to process time rhythm demand, by steel ladle handling to conticaster Bale panoramic tables on;
S3, tundish is preheated, molten steel is then poured into tundish by 1200~1250 DEG C of preheating temperature, controls the degree of superheat For 20~60 DEG C, middle water containing opening is assigned in each crystallizer, and thickness is poured into a manner of totally-enclosed as 100~160mm, width Spend thin plate strand in the zero defect for being 9000~15600mm for 600~1300mm, length;
S4, the strand obtained in S3 is solidified, casting blank solidification process uses two device for cooling, is equipped in two device for cooling close The guide roller of collection, to control the bulge problem of strand;
S5, the strand obtained in S4 is drawn out to by conticaster by withdrawal straightening machine, for prevent base bulge and reduce aligning when strand in The distortional stress in portion, the withdrawal straightening machine at least needs 20 pairs of pulling-straightening rollers, and is designed to multipoint straightening or continuous straightening, and strand goes out to connect The mean temperature of casting machine is 920~950 DEG C;
S6, strand is transported to heating furnace heats, the heat treatment temperature of selection is less than overlay coating
Recrystallization temperature and sinking higher than the compound formed by nonmetalloid and overlay coating metal being deposited on crystal boundary Accumulated temperature degree, pre- precision processing layer are by diffusion annealing, and a disperse coating is covered with after the pre- precision processing layer of diffusion annealing and is connect It and is covered with an overlay coating, overlay coating passes through the embrittlement that is heat-treated according to the nonmetallic ingredient of filling to have target;
It S7 and then is conveyed by walking beam, strand is made to be heated in advance, when strand temperature is heated to 1150~1250 DEG C When, it is uniform to reach surface and the core temperature of strand, and extractor send strand picking-up to delivery roller table outside stove;
S8, strand crush the oxide of belt steel surface using planisher, are removed after being rolled in line six-high cluster mill, Scrubbing roller in brushing device removes the oxide that casting billet surface comes off and loosens, and tension straingtening and broken phosphorus, warp are carried out to strand After the broken phosphorus of overstretching aligning, Shot Blasting is carried out to strand, the Shot Blasting is the mud injection mixed using water and abrasive material, After Shot Blasting, scrub is ground using scrubbing unit to strand;
S9, smooth, aligning will be passed through and scrub treated strand carries out pickling, the temperature of pickle is set as 20-70 DEG C Under the conditions of carry out 1-30 seconds, to the strand after pickling by polishing scrub after, strand is dried;
S10 and then warm-rolling is carried out under the conditions of nitrogen atmosphere, start rolling temperature is 500~550 DEG C, and finishing temperature is 380~450 DEG C, overall reduction is 40~50%, obtains warm-rolling band;
S11, by warm-rolling band removing iron scale, subsequent strand enters roughing mill and back and forth rolls 3-4 passages, obtain among base, intermediate base 7-8 passages are continuously rolled into finishing mill, obtain finished product.
2. a kind of compact medium-width strip steel production process described in claim 1, it is characterised in that:Conticaster in the step S5 Section is 1600mm × 230mm, and casting machine conical degree of crystallizer is 1.1 to 1.4%/m, and casting machine pulling rate is 1.0 to 1.4m/min, crystallization Device is parallel-plate straight mo(u)ld.
3. a kind of compact medium-width strip steel production process described in claim 1, it is characterised in that:It is secondary in the step S4 Aerosol cooling is cooled to, by two-stage computer control.
4. a kind of compact medium-width strip steel production process described in claim 1, it is characterised in that:Base among the step S11 After finishing rolling step comes out, thermometric is carried out, wide, survey convexity is surveyed, surveys glacing flatness and Thickness Measurement by Microwave.
5. a kind of compact medium-width strip steel production process described in claim 1, it is characterised in that:The step S6 heating furnaces add 3~5 block casting base rooms are set as breeze way, to reach buffer time as 18~30 minutes in hot soaking pit.
CN201711453871.9A 2017-12-28 2017-12-28 A kind of compact medium-width strip steel production process Pending CN108080416A (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1864878A (en) * 2005-05-20 2006-11-22 中冶东方工程技术有限公司 Compact medium-width strip steel production process
CN102744277A (en) * 2012-07-23 2012-10-24 中冶南方工程技术有限公司 Method for producing cold-rolled stainless steel annealing and pickling brand steel
CN103920739A (en) * 2014-03-27 2014-07-16 中冶南方工程技术有限公司 Method for producing products by replacing cold by using heat with low acid consumption and high surface quality
CN106345976A (en) * 2016-11-16 2017-01-25 攀钢集团攀枝花钢铁研究院有限公司 Continuous casting crystallizer casting powder and continuous casting method of wide and thick slab micro-carbon steel
CN106513605A (en) * 2016-11-16 2017-03-22 攀钢集团攀枝花钢铁研究院有限公司 Method for improving low-carbon aluminum killed steel cold-rolled plate coil peeling
CN107164693A (en) * 2017-06-01 2017-09-15 东北大学 A kind of preparation method based on the high silicon steel cold-strip steel of thin strap continuous casting
CN107245647A (en) * 2017-06-01 2017-10-13 东北大学 The method that one kind prepares flourishing { 100 } plane texture non-orientation silicon steel thin belt based on thin strap continuous casting
CN107245646A (en) * 2017-06-01 2017-10-13 东北大学 A kind of preparation method of the circumferential high-magnetic induction, low-iron loss non-orientation silicon steel of plate face

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1864878A (en) * 2005-05-20 2006-11-22 中冶东方工程技术有限公司 Compact medium-width strip steel production process
CN102744277A (en) * 2012-07-23 2012-10-24 中冶南方工程技术有限公司 Method for producing cold-rolled stainless steel annealing and pickling brand steel
CN103920739A (en) * 2014-03-27 2014-07-16 中冶南方工程技术有限公司 Method for producing products by replacing cold by using heat with low acid consumption and high surface quality
CN106345976A (en) * 2016-11-16 2017-01-25 攀钢集团攀枝花钢铁研究院有限公司 Continuous casting crystallizer casting powder and continuous casting method of wide and thick slab micro-carbon steel
CN106513605A (en) * 2016-11-16 2017-03-22 攀钢集团攀枝花钢铁研究院有限公司 Method for improving low-carbon aluminum killed steel cold-rolled plate coil peeling
CN107164693A (en) * 2017-06-01 2017-09-15 东北大学 A kind of preparation method based on the high silicon steel cold-strip steel of thin strap continuous casting
CN107245647A (en) * 2017-06-01 2017-10-13 东北大学 The method that one kind prepares flourishing { 100 } plane texture non-orientation silicon steel thin belt based on thin strap continuous casting
CN107245646A (en) * 2017-06-01 2017-10-13 东北大学 A kind of preparation method of the circumferential high-magnetic induction, low-iron loss non-orientation silicon steel of plate face

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