WO2021139555A1 - Dispositif d'économie d'énergie et procédé de production d'acier allongé par calandrage à l'aide d'une chaleur perdue de fusion - Google Patents

Dispositif d'économie d'énergie et procédé de production d'acier allongé par calandrage à l'aide d'une chaleur perdue de fusion Download PDF

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Publication number
WO2021139555A1
WO2021139555A1 PCT/CN2020/140168 CN2020140168W WO2021139555A1 WO 2021139555 A1 WO2021139555 A1 WO 2021139555A1 CN 2020140168 W CN2020140168 W CN 2020140168W WO 2021139555 A1 WO2021139555 A1 WO 2021139555A1
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Prior art keywords
roller
machine
rolling
slab
roller table
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PCT/CN2020/140168
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English (en)
Chinese (zh)
Inventor
于宏朋
杨锡红
王正刚
杨梁
Original Assignee
南京净环热冶金工程有限公司
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Priority claimed from CN202020053069.1U external-priority patent/CN211990254U/zh
Priority claimed from CN202010027894.9A external-priority patent/CN111112328A/zh
Application filed by 南京净环热冶金工程有限公司 filed Critical 南京净环热冶金工程有限公司
Publication of WO2021139555A1 publication Critical patent/WO2021139555A1/fr

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    • 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
    • B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations 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
    • 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
    • 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
    • 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
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • 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
    • B22D11/14—Plants for continuous casting

Definitions

  • the invention belongs to the field of rolling production of iron and steel materials, and specifically relates to an energy-saving device and method for producing long steel by rolling using smelting waste heat, which can be adapted to various production requirements.
  • the production method from liquid steel to rolling into steel is: the liquid steel produced by smelting enters the multi-stream continuous casting machine to continuously produce multi-stream solid high-temperature casting billets. After the slab is cut, it is collected from the cooling bed of the continuous casting machine and sent to the rolling workshop in cooling or hot state, and then enters the heating furnace for secondary heating. The heated slab enters the rolling equipment one by one for rolling.
  • the billet temperature is relatively low, and the temperature difference between the head and tail is large, which cannot meet the rolling production requirements. It must be heated by a heating furnace for a second time.
  • the heating time of the heating furnace is generally more than 1 hour, except for the In addition to consuming a lot of energy, increasing production costs and exhaust gas emissions, it will also cause oxidative burning of the cast slab during the heating process, resulting in material waste. However, the waste heat of the slab during smelting is not effectively used, and the best energy saving effect is not achieved.
  • the present invention provides an energy-saving device and method for producing long-shaped steel by using smelting waste heat and rolling.
  • the slab smelting waste heat In addition to making full use of the slab smelting waste heat, it can also take into account the different lengths and lengths of the slab during rolling production. The requirements of temperature, head and tail temperature difference, flexible adjustment of production process, reduce production costs, reduce use restrictions, and expand application areas.
  • An energy-saving device that uses smelting waste heat to calender to produce long steel products, including a multi-stream continuous caster, a multi-stream roller-bottom tunnel kiln, a roller-bottom traverse machine, a dispatching roller table and shift fork, a straight-rolling roller table, and a straight-rolling waste rejection machine , Hot delivery roller table, slab straightening machine, hot delivery rejecting machine, slab heating furnace, calender;
  • the multi-stream roller-bottom tunnel kiln, the roller-bottom traverse machine, the dispatching roller table and the shift fork are connected in sequence, and the dispatching roller table and the shifting fork divide the roller table into two strands, one of which is connected to the straight-rolling roller table and the straight-rolling roller in turn.
  • Rolling and rejecting machine, calender, and the other one is connected with hot conveying roller table, casting slab straightening machine, hot conveying rejecting machine, casting slab heating furnace, casting slab heating furnace and calender connecting to form a set of rolling production line;
  • Multi-stream continuous caster connected to multi-stream roller-bottom tunnel kiln;
  • the multi-stream roller-bottom tunnel kiln is arranged between the multi-stream continuous caster and the roller-bottom traverse machine (3), and each slab is provided with an independent set, which can only accommodate one slab to pass through;
  • the roller-bottom tunnel kiln is equipped with a conveying roller table inside, and a passage cover made of thermal insulation material is installed outside;
  • the roller bottom traverse machine has multiple sets of roller tables and is provided with movable baffles; the conveying cast billet is moved to the subsequent dispatching roller table, and the casting slab can also be stopped on the roller bottom traverse machine by starting and stopping or the movable baffle action. On the upper side, the slab is collected by the horizontal movement mechanism and moved out of the production line from the side;
  • the dispatching roller table and the shift fork are a two-divided roller table group with a gradually narrowing width, and baffles are provided on both sides of the roller table; the shift fork swings between the two roller tables;
  • the steel billet conveyed in the direction is guided by the baffles on both sides of the roller table to the single-strand width straight rolling table or the hot conveying table; the shift fork stops at different positions, and it can form a different oriented contraction with the fixed baffle plate.
  • the channel enables the billet on the dispatch roller table to be guided and transported to different single-strand width roller tables, such as the direction of the straight rolling table or the hot conveying table;
  • the straight rolling roller table is connected with the dispatching roller table and the calender, and can transport the continuous casting billet to the calender;
  • the straight-rolling waste rejection machine is a traditional equipment that can selectively block the cast slab conveyed on the straight-rolling roller table by a movable baffle, and then move the steel billet on the roller table to the side rack through a traverse mechanism for stacking. Realize the selective removal of unqualified blanks from the straight rolling table to the next stand for temporary storage, instead of sending it to the calender;
  • the hot conveying roller table is connected to the dispatching roller table and the casting billet heating furnace, and can transport a single continuous casting billet to the steel inlet of the casting billet heating furnace, so that the single continuous casting billet enters the casting billet heating furnace for heating;
  • the slab straightening machine is arranged on the hot conveying roller table and is provided with several laterally directed rotating rollers. When the bent hot slab passes through the slab straightening machine, it can be controlled by the slab straightening machine.
  • the rotating roller is straightened to a relatively straight line during the pinch and guiding process to ensure that the straightness that meets the requirements is achieved when it enters the casting billet heating furnace later;
  • the hot delivery rejecting machine is a traditional equipment that can selectively block the casting billets conveyed on the hot delivery roller table by the movable baffle, and then move the billet on the roller table to the side rack through the traverse mechanism. Realize the selective removal of unqualified billets from the hot conveying roller table to the next shelf for temporary storage, instead of sending them to the casting billet heating furnace;
  • the slab sent from the hot conveying roller table is moved horizontally in the furnace to the front of the calender, while the slab is heated or the temperature is homogenized in the furnace, and then the slab is moved out of the slab for heating Furnace, enter the calender;
  • the multi-stream hot and hot cast slab produced by the multi-stream continuous casting machine passes through the multi-stream roller bottom tunnel kiln, after the roller bottom traverse machine, maintains the hot state and is dispatched by the dispatch roller table and shift fork for dispatching.
  • Roots are continuously passed through the straight rolling table and directly fed into the calender, or a single wire can be continuously passed through the hot feeding roller table and the slab straightening machine, and then sent to the slab heating furnace, and then enter the calender after traverse heating. It realizes the functions of using smelting waste heat, low energy consumption and heating of the slab, and entering the calender through multiple routes.
  • the billets produced by the multi-strand continuous casting machine need to be collected by the roller bottom traverse machine, and then enter the casting billet heating furnace for secondary heating after cooling, which greatly reduces the heating energy consumption.
  • the multi-stream roller-bottom tunnel kiln is arranged in the entire range from the multi-stream continuous caster to the roller-bottom traverse machine or in one or more sections;
  • the channel cover is composed of a combination of a lower cover and an upper cover or only a lower cover.
  • the multi-flow roller-bottom tunnel kiln is provided with a plurality of heaters inside the channel cover. The heating of the casting slab passing through the interior is selected so that the temperature of the casting slab is increased.
  • the heater adopts one of combustion heating, electromagnetic induction heating, and resistance heating.
  • a plurality of casting slab position detection and casting slab temperature detection devices are arranged in the multi-stream roller bottom tunnel kiln. The position and temperature of the cast slab can be detected.
  • the shift fork swings with the bifurcation point of the roller table as a fixed axis or moves in parallel between the two strands of roller table.
  • the shift fork stays at different positions to form a guiding channel, which can guide the multi-strand continuous casting billet to the subsequent straight rolling roller table or the hot conveying roller table, or stop at different intermediate positions to realize the multi-strand continuous casting billet.
  • Some of the streams are directed to the straight-rolling roller table, while the other streams are directed to the hot-sending roller table.
  • the swinging and rotating action of the shift fork can also be realized by linear movement or other means to achieve the guiding and fixing function.
  • the straight-rolling roller table and the hot-feeding roller table are provided with a heat preservation cover or a wind shield. To shield the conveyed billets to reduce the heat loss during the conveying process.
  • a single multi-stream continuous casting machine is connected to a single calendering production line, or multiple multi-stream continuous casting machines are connected to a single calendering production line, or a single multi-stream continuous casting machine is connected to multiple calendering production lines, or multiple sets of calendering production lines are connected.
  • the continuous casting machine is connected with multiple calendering production lines.
  • the energy-saving method of further utilizing smelting waste heat and rolling to produce long steel includes the following steps:
  • Cast billet direct rolling conveying dispatching roller table and shift fork to send cast billets one by one to the straight rolling roller table, and the straight rolling roller table sends the cast billets to the calender through the straight rolling waste rejection machine;
  • Billet sequencing When the multi-strand billet passes through the multi-strand roller bottom tunnel kiln to reach the roller bottom traverse machine, the traveling speed of the billet is controlled according to the position and temperature of the cast billet in each multi-strand roller bottom tunnel kiln.
  • the traverse machine allows the casting slab to pass through the roller table leading to the dispatcher, or when necessary, through the movable baffle or the roller table speed control, the casting slab sent from the multi-stream roller bottom tunnel kiln stays on the roller bottom traverse machine, and then Move laterally to the storage position on the side, and do not directly enter the dispatch roller conveyor;
  • Cast billet hot conveying dispatching roller table and shift fork to guide the cast billets one by one to the hot conveying roller table, the hot conveying roller table will send the casting billets to the caster through the billet straightening machine and the hot conveying waste rejection machine.
  • Billet heating furnace before the billet enters the billet heating furnace, the bent billet is straightened by the billet straightening machine to ensure the billet feeding requirements of the heating furnace;
  • the heating furnace hot delivery and non-heating furnace direct rolling are interleaved:
  • the cast slabs sent by the remaining multi-stream continuous casters pass through the multi-stream roller bottom tunnel kiln, roller bottom traversing machine, dispatching roller table and shift fork, hot conveying roller table, casting slab straightening machine, heat Send the waste rejection machine into the billet heating furnace until the billet heating furnace is full of billets again;
  • the metallurgical waste heat of the cast slab is used to realize the rapid entry of the cast slab into the heating furnace through the heat preservation and conveying function of the multi-flow roller bottom tunnel kiln and the hot conveying roller table.
  • the heating and temperature are uniform. Because the temperature of the billet entering the heating furnace is much higher than that of the traditional process, the fuel consumption of the heating furnace is reduced, and the production cost and pollutant emission are reduced;
  • Fig. 1 is a plan view of an embodiment of an energy-saving device for producing long steel by rolling using smelting waste heat according to the present invention
  • Multi-stream continuous casting machine 2. Multi-stream roller bottom tunnel kiln, 3. Roller bottom traverse machine, 4. Dispatching roller table and shift fork, 5. Straight rolling roller table, 6. Straight rolling waste rejection machine, 7 . Calender, 8. Hot delivery roller table, 9. Cast slab straightening machine, 10. Hot delivery rejecting machine, 11. Cast slab heating furnace.
  • Fork 4 straight-rolling roller table 5, straight-rolling waste rejection machine 6, hot delivery roller table 8, cast slab straightener 9, hot delivery waste rejection machine 10, casting billet heating furnace 11, calender 7.
  • the multi-stream continuous casting machine 1 is connected to the multi-stream roller-bottom tunnel kiln 2; the multi-stream roller-bottom tunnel kiln 2, the roller bottom traverse machine 3, the dispatching roller table and the shift fork 4 are connected in sequence; the dispatching roller table and the shift fork 4 are connected in sequence
  • the roller table is divided into two strands, one of which is connected to the straight rolling table 5, the straight rolling rejecter 6, and the calender 7 in sequence, and the other one is connected to the hot conveying roller table 8, the cast slab straightening machine 9, and the hot conveying reject in sequence.
  • the machine 10, the casting billet heating furnace 11, and the casting billet heating furnace 11 are then connected with the calender 7 to form a set of calendering production line.
  • the multi-stream roller-bottom tunnel kiln 2 is arranged after the slab shearing machine of the multi-stream continuous caster 1 to the roller-bottom traverse machine 3.
  • Each slab is equipped with an independent set, which can only accommodate 1 stream. Cast billet crossing.
  • the four sides of the conveying roller table are in the form of a channel cover enclosed by thermal insulation materials.
  • the channel cover is divided into upper and lower parts. The upper and lower covers are combined, and the upper cover can be lifted and separated, which is convenient for maintenance and operation.
  • a plurality of burners are arranged inside the multi-flow roller-bottom tunnel kiln 2, using propane/pure oxygen as fuel to heat the casting slab passing through the interior, so that the casting slab obtains an increase in temperature or a uniform temperature.
  • several slab position detection and slab temperature detection devices are provided in the multi-stream roller bottom tunnel kiln 2, which can detect the position and temperature of the slab.
  • the roller bottom traverse machine 3 is a multi-group roller table with movable baffles, which can not only transport the casting billet to the subsequent dispatching roller table and shift fork 4, but also can stop the casting billet at the start and stop or move the movable baffle.
  • the casting slab is collected by the traverse mechanism and moved out of the production line from the side.
  • the dispatching roller table and the shift fork 4 divide the roller table into two groups.
  • the dispatching roller table is a roller table group with a gradually narrowing width.
  • the steel billet conveyed in multiple directions can be guided to the single roller table through the baffles on both sides of the roller table. It is conveyed on the straight rolling roller table 5 or the hot conveying roller table 8 of the flow width.
  • the shift fork is a baffle that can swing around a fixed axis.
  • the fixed shaft is located at the bifurcation point of the roller table. When the shift fork swings to different positions, it can form a shrinkage channel with different orientations with the fixed baffle, so that the billet on the roller table can be dispatched and guided. Convey to different single-stream width roller tables. In this example, it can be directed to the 5 direction of the straight rolling roller table or the 8 direction of the hot feeding roller table.
  • the straight-rolling roller table 5 is connected to the dispatching roller table in front, and then connected to the calender 7 through the straight-rolling rejecting machine 6 to convey a single continuous casting billet to the calendering machine 7; the straight-rolling rejecting machine 6 is capable of removing the straight rolls.
  • the slab on the roller table is moved out to the traditional equipment stacked on the side rack through the traverse mechanism, and the unqualified billet is selected from the straight rolling table 5. It is moved out to the next shelf for temporary storage, and is no longer sent to the calender 7.
  • the hot delivery roller table 8 is connected to the dispatch roller table 4 in front, and then is connected to the slab heating furnace 11 through the slab straightening machine 9 and the hot delivery rejecting machine 10, which can transport the continuous casting slab to the slab heating furnace 11
  • the steel inlet allows a single continuous casting billet to enter the billet heating furnace 11 for heating.
  • the slab straightening machine 9 is provided with several laterally directed rotating rollers. When the bent hot slab passes through the slab straightening machine 9, it can be pinched and guided by the rotating rollers of the slab straightening machine 9 , The straightening is a relatively straight state, which ensures that the straightness that meets the requirements is achieved when the billet heating furnace 11 is subsequently entered.
  • the hot delivery rejecting machine 10 is a traditional casting billet that can transport the billet from the billet straightening machine 9. After it is selectively blocked by the movable baffle, the billet on the roller table is moved out to the side rack by the traverse mechanism. The equipment realizes the selective removal of unqualified blanks from the hot conveying roller table 8 to the next shelf for temporary storage, instead of sending them to the casting billet heating furnace 11.
  • the casting billet heating furnace 11 moves the casting billet fed from the hot feeding roller table 8 in the furnace to the front of the calender 7 while heating or homogenizing the casting billet in the furnace, and then the casting billet is discharged out of the casting billet heating furnace 11 , Into the calender 7 production.
  • a new energy-saving device that uses smelting waste heat to calender to produce long steel, including multi-stream continuous caster 1, multi-stream roller bottom tunnel kiln 2, roller bottom traverse machine 3, dispatching roller table and shift fork 4, straight rolling roller table 5.
  • Straight rolling waste rejection machine 6 hot delivery roller table 8, casting slab straightening machine 9, hot delivery waste rejection machine 10, casting slab heating furnace 11, calender 7.
  • the multi-stream continuous casting machine 1 is connected to the multi-stream roller-bottom tunnel kiln 2; the multi-stream roller-bottom tunnel kiln 2, the roller bottom traverse machine 3, the dispatching roller table and the shift fork 4 are connected in sequence; the dispatching roller table and the shift fork 4 are connected in sequence
  • the roller table is divided into two strands, one of which is connected to the straight rolling table 5, the straight rolling rejecter 6, and the calender 7 in sequence, and the other one is connected to the hot conveying roller table 8, the cast slab straightening machine 9, and the hot conveying reject in sequence.
  • the machine 10, the casting billet heating furnace 11, and the casting billet heating furnace 11 are then connected with the calender 7 to form a set of calendering production line.
  • the multi-stream roller-bottom tunnel kiln 2 is arranged after the slab shearing machine of the multi-stream continuous casting machine 1 to the section between the roller-bottom traverse machine 3 and the roller-bottom traverse machine 3, and an independent set is provided for each slab , It can only accommodate 1 slab to pass through.
  • the three sides of the conveying roller table are in the form of a channel cover closed by thermal insulation materials.
  • the channel cover is a lower cover without a top cover, which is convenient for maintenance and operation.
  • a plurality of heaters are arranged inside the multi-flow roller-bottom tunnel kiln 2, and electromagnetic induction heating is used to heat the casting slab passing through the interior, so that the temperature of the casting slab is increased, or the temperature is uniform.
  • several slab position detection and slab temperature detection devices are provided in the multi-stream roller bottom tunnel kiln 2, which can detect the position and temperature of the slab.
  • the roller bottom traverse machine 3 is a multi-group roller table with movable baffles, which can not only transport the casting billet to the subsequent dispatching roller table and shift fork 4, but also can stop the casting billet at the start and stop or move the movable baffle.
  • the casting slab is collected by the traverse mechanism and moved out of the production line from the side.
  • the dispatching roller table and the shift fork 4 divide the roller table into two groups.
  • the dispatching roller table is a roller table group with a gradually narrowing width.
  • the steel billet conveyed in multiple directions can be guided to the single roller table through the baffles on both sides of the roller table. It is conveyed on the straight rolling roller table 5 or the hot conveying roller table 8 of the flow width.
  • the shifting fork is a baffle that moves in parallel between the two rollers. When the shifting fork moves to different positions, it can form a differently oriented shrinkage channel with the fixed baffle, so that the billet on the dispatching roller is guided and transported to different single streams.
  • On the width roller table in this example, it can be directed to the 5 direction of the straight rolling table or the 8 direction of the hot feeding table.
  • the straight-rolling roller table 5 is connected to the dispatching roller table in front, and then connected to the calender 7 through the straight-rolling rejecting machine 6 to convey a single continuous casting billet to the calendering machine 7; the straight-rolling rejecting machine 6 is capable of removing the straight rolls.
  • the slab on the roller table is moved out to the traditional equipment stacked on the side rack through the traverse mechanism, and the unqualified billet is selected from the straight rolling table 5. It is moved out to the next shelf for temporary storage, and is no longer sent to the calender 7.
  • the hot delivery roller table 8 is connected to the dispatch roller table 4 in front, and then is connected to the slab heating furnace 11 through the slab straightening machine 9 and the hot delivery rejecting machine 10, which can transport the continuous casting slab to the slab heating furnace 11
  • the steel inlet allows a single continuous casting billet to enter the billet heating furnace 11 for heating.
  • the slab straightening machine 9 is provided with several laterally directed rotating rollers. When the bent hot slab passes through the slab straightening machine 9, it can be pinched and guided by the rotating rollers of the slab straightening machine 9 , The straightening is a relatively straight state, which ensures that the straightness that meets the requirements is achieved when the billet heating furnace 11 is subsequently entered.
  • the hot delivery rejecting machine 10 is a traditional casting billet that can transport the billet from the billet straightening machine 9. After it is selectively blocked by the movable baffle, the billet on the roller table is moved out to the side rack by the traverse mechanism. The equipment realizes the selective removal of unqualified blanks from the hot conveying roller table 8 to the next shelf for temporary storage, instead of sending them to the casting billet heating furnace 11.
  • the casting billet heating furnace 11 moves the casting billet fed from the hot conveying roller table in the furnace to the front of the calender 7 while heating or homogenizing the casting billet in the furnace, and then the casting billet is discharged out of the casting billet heating furnace 11, Enter the calender 7.
  • a new energy-saving device that uses smelting waste heat to calender to produce long steel, including multi-stream continuous caster 1, multi-stream roller bottom tunnel kiln 2, roller bottom traverse machine 3, dispatching roller table and shift fork 4, straight rolling roller table 5.
  • Straight rolling waste rejection machine 6 hot delivery roller table 8, casting slab straightening machine 9, hot delivery waste rejection machine 10, casting slab heating furnace 11, calender 7.
  • the multi-stream continuous casting machine 1 is connected to the multi-stream roller-bottom tunnel kiln 2; the multi-stream roller-bottom tunnel kiln 2, the roller bottom traverse machine 3, the dispatching roller table and the shift fork 4 are connected in sequence; the dispatching roller table and the shift fork 4 are connected in sequence
  • the roller table is divided into two strands, one of which is connected to the straight rolling table 5, the straight rolling rejecter 6, and the calender 7 in sequence, and the other one is connected to the hot conveying roller table 8, the cast slab straightening machine 9, and the hot conveying reject in sequence.
  • the machine 10, the casting billet heating furnace 11, and the casting billet heating furnace 11 are then connected with the calender 7 to form a set of calendering production line.
  • the multi-stream roller-bottom tunnel kiln 2 is arranged between the slab shearing machine of the multi-stream continuous casting machine 1 and the roller bottom traverse machine 3, and is located near the exit of the slab shearing machine and the entrance of the roller bottom traversing machine 3 There are two sections, each slab is equipped with an independent set, which can only accommodate one slab to pass through.
  • the four sides of the conveying roller table are in the form of a channel cover enclosed by thermal insulation materials.
  • the channel cover is divided into upper and lower parts. The upper and lower covers are combined, and the upper cover can be lifted and separated, which is convenient for maintenance and operation.
  • a plurality of heaters are arranged inside the multi-flow roller-bottom tunnel kiln 2, and electric resistance heating is adopted to heat the casting slab passing through the interior, so that the temperature of the casting slab is increased or the temperature is uniform.
  • several slab position detection and slab temperature detection devices are provided in the multi-stream roller bottom tunnel kiln 2, which can detect the position and temperature of the slab.
  • the roller bottom traverse machine 3 is a multi-group roller table with movable baffles, which can not only transport the casting billet to the subsequent dispatching roller table and shift fork 4, but also can stop the casting billet at the start and stop or move the movable baffle.
  • the casting slab is collected by the traverse mechanism and moved out of the production line from the side.
  • the dispatching roller table and the shift fork 4 divide the roller table into two groups.
  • the dispatching roller table is a roller table group with a gradually narrowing width.
  • the steel billet conveyed in multiple directions can be guided to the single roller table through the baffles on both sides of the roller table. It is conveyed on the straight rolling roller table 5 or the hot conveying roller table 8 of the flow width.
  • the shift fork is a baffle that can swing around a fixed axis.
  • the fixed shaft is located at the bifurcation point of the roller table. When the shift fork swings to different positions, it can form a shrinkage channel with different orientations with the fixed baffle, so that the billet on the roller table can be dispatched and guided. Convey to different single-stream width roller tables. In this example, it can be directed to the 5 direction of the straight rolling roller table or the 8 direction of the hot feeding roller table.
  • the straight-rolling roller table 5 is connected to the dispatching roller table in front, and then connected to the calender 7 through the straight-rolling rejecting machine 6 to transport a single continuous casting billet to the calendering machine 7; the straight-rolling rejecting machine 6 is capable of removing the straight-rolling roller table 5 After the cast slab conveyed on the upper side is selectively blocked by the movable baffle, the slab on the roller table is moved out to the traditional equipment stacked on the side rack through the traverse mechanism, and the unqualified billet is selectively removed from the straight rolling table 5 Move it out to the next shelf for temporary storage, instead of sending it to the calender 7.
  • the hot delivery roller table 8 is connected to the dispatch roller table 4 in front, and then is connected to the slab heating furnace 11 through the slab straightening machine 9 and the hot delivery rejecting machine 10, which can transport the continuous casting slab to the slab heating furnace 11
  • the steel inlet allows a single continuous casting billet to enter the billet heating furnace 11 for heating.
  • the slab straightening machine 9 is provided with several laterally directed rotating rollers. When the bent hot slab passes through the slab straightening machine 9, it can be pinched and guided by the rotating rollers of the slab straightening machine 9 , The straightening is a relatively straight state, which ensures that the straightness that meets the requirements is achieved when the billet heating furnace 11 is subsequently entered.
  • the hot delivery rejecting machine 10 is a traditional casting billet that can transport the billet from the billet straightening machine 9. After it is selectively blocked by the movable baffle, the billet on the roller table is moved out to the side rack by the traverse mechanism. The equipment realizes the selective removal of unqualified blanks from the hot conveying roller table 8 to the next shelf for temporary storage, instead of sending them to the casting billet heating furnace 11.
  • the casting billet heating furnace 11 moves the casting billet fed from the hot conveying roller table in the furnace to the front of the calender 7 while heating or homogenizing the casting billet in the furnace, and then the casting billet is discharged out of the casting billet heating furnace 11, Enter the calender 7.
  • the calendering production lines in Examples 1 to 3 can be combined with a multi-stream continuous casting machine 1, such as connecting a single multi-stream continuous casting machine 1 and a single calendering production line, or multiple multi-stream continuous casting lines.
  • the casting machine 1 is connected with a single calendering production line, or a single multi-stream continuous casting machine 1 is connected with multiple calendering production lines, or multiple multi-stream continuous casting machines 1 are connected with multiple calendering production lines.
  • the energy-saving method of using smelting waste heat and rolling to produce long steel includes the following steps:
  • Roller bottom traversing machine 3 allows the casting billet to pass through the roller table leading to the dispatcher, or when necessary, through the movable baffle or roller speed control, the casting billet sent from the multi-stream roller bottom tunnel kiln 2 stays at Roller bottom traverse machine 3, and then traverse to the side storage position, not directly into the dispatch roller table;
  • Cast slab straight rolling conveying dispatching roller table and shift fork 4 will guide the cast slabs one by one to the straight rolling table 5, and the straight rolling table 5 will send the cast slab to the calender 7 through the straight rolling rejecting machine 6;
  • the heating furnace heating method is used:
  • Roller-bottom traverse machine 4 allows the billet to pass through the roller table leading to the dispatcher, or through the movable baffle or the speed of the roller table when needed, the cast billet from the multi-stream roller-bottom tunnel kiln 2 stays on the roller Bottom traverse machine 4, and then traverse to the side storage position, without directly entering the dispatch roller conveyor;
  • Cast billet hot conveying dispatch the roller table and shift fork 4 to guide the cast billets one by one to the hot conveying roller table 8.
  • the hot conveying roller table 8 passes the cast billets through the cast billet straightening machine 9 and hot sending and rejecting waste.
  • the machine 10 is sent to the slab heating furnace 11; before the slab enters the slab heating furnace 11, the curved slab is straightened by the slab straightening machine 9 to ensure the billet feeding requirements of the heating furnace;
  • the scrap machine 6 After the scrap machine 6, it enters the calender 7 for calendering production; the cast billets from the remaining multi-stream continuous casting machine 1 pass through the multi-stream roller-bottom tunnel kiln 2, the roller-bottom traverse machine 3, the dispatch roller table and the shift fork 4 in turn , The hot-feeding roller table 8, the slab straightening machine 9, the hot-feeding waste rejection machine 10 enter the slab heating furnace 11, until the slab heating furnace 11 is filled with slabs again;
  • the heating is supplemented by a heating furnace, and the heating time is generally more than 1 hour.
  • using the patented technology of the present invention can save about 300-600 GJ/ton of steel for the energy required for supplementary heating, and correspondingly reduce the pollution caused by fuel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un dispositif d'économie d'énergie pour la production d'acier allongé par calandrage à l'aide d'une chaleur perdue de fusion, comprenant une machine de coulée continue à brins multiples (1), un four tunnel à rouleaux et à brins multiples (2), une machine de transbordement à rouleaux (3), une table à rouleaux de répartition et une fourche de décalage (4), une table à rouleaux de roulement direct (5), une machine de tri de roulement direct (6), une table à rouleaux de transport à chaud (8), une machine à dresser des billettes (9), une machine de tri de transport à chaud (10), un four de chauffage de billettes (11), et une calandre (7). Après avoir traversé le four tunnel à rouleaux et à brins multiples et la machine de transbordement à rouleaux, les billettes à brins multiples produites par la machine de coulée continue sont réparties et transportées dans un état chaud par la table à rouleaux de répartition et la fourche de décalage, et les billettes peuvent être directement introduites dans la calandre après avoir traversé la table à rouleaux de roulement direct ou être introduites dans la calandre après avoir traversé en continu la table à rouleaux de transport à chaud et la machine à dresser des billettes et être ensuite introduites dans le four de chauffage de billettes et soumises à un chauffage de transbordement. La présente invention concerne également un procédé d'économie d'énergie utilisant le dispositif d'économie d'énergie pour la production d'acier allongé par calandrage à l'aide d'une chaleur perdue de fusion, qui accomplit les fonctions d'utilisation de chaleur perdue de fusion, de consommation d'une faible énergie pour le chauffage des billettes, et de l'introduction dans la calandre au moyen de multiples chemins. Comparativement au procédé de production classique dans lequel les billettes d'acier produites par une machine de coulée continue sont collectées par une machine de transbordement à rouleaux, et introduites ensuite dans un four de chauffage de billettes après avoir été refroidies, le présent procédé peut considérablement réduire la consommation d'énergie.
PCT/CN2020/140168 2020-01-10 2020-12-28 Dispositif d'économie d'énergie et procédé de production d'acier allongé par calandrage à l'aide d'une chaleur perdue de fusion WO2021139555A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202020053069.1U CN211990254U (zh) 2020-01-10 2020-01-10 一种利用冶炼余热压延生产长型钢材的节能装置
CN202010027894.9 2020-01-10
CN202010027894.9A CN111112328A (zh) 2020-01-10 2020-01-10 一种利用冶炼余热压延生产长型钢材的节能装置及方法
CN202020053069.1 2020-01-10

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071271A1 (fr) * 1999-05-21 2000-11-30 Danieli Technology, Inc. Complexe integre de production de pieces laminees
CN107008750A (zh) * 2017-04-20 2017-08-04 中冶南方工程技术有限公司 双通道长材连铸连轧生产线及其生产方法
CN108151538A (zh) * 2017-12-15 2018-06-12 北京首钢国际工程技术有限公司 适用于棒线材生产线热送热装和直接轧制的推钢式加热炉
CN110386449A (zh) * 2019-08-06 2019-10-29 北京首钢国际工程技术有限公司 一种钢坯输送系统
CN111112328A (zh) * 2020-01-10 2020-05-08 南京净环热冶金工程有限公司 一种利用冶炼余热压延生产长型钢材的节能装置及方法
CN211990254U (zh) * 2020-01-10 2020-11-24 南京净环热冶金工程有限公司 一种利用冶炼余热压延生产长型钢材的节能装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071271A1 (fr) * 1999-05-21 2000-11-30 Danieli Technology, Inc. Complexe integre de production de pieces laminees
CN107008750A (zh) * 2017-04-20 2017-08-04 中冶南方工程技术有限公司 双通道长材连铸连轧生产线及其生产方法
CN108151538A (zh) * 2017-12-15 2018-06-12 北京首钢国际工程技术有限公司 适用于棒线材生产线热送热装和直接轧制的推钢式加热炉
CN110386449A (zh) * 2019-08-06 2019-10-29 北京首钢国际工程技术有限公司 一种钢坯输送系统
CN111112328A (zh) * 2020-01-10 2020-05-08 南京净环热冶金工程有限公司 一种利用冶炼余热压延生产长型钢材的节能装置及方法
CN211990254U (zh) * 2020-01-10 2020-11-24 南京净环热冶金工程有限公司 一种利用冶炼余热压延生产长型钢材的节能装置

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