Method for efficiently saving high-carbon gas consumption of bars

Abstract

The invention discloses a method for efficiently saving high-carbon gas consumption of a bar. The method comprises the following steps that rolling processes of rolling passes of all specifications of a bar line are set, the rolling speed is adjusted, loads of rolling equipment are redistributed, and the casting rhythm of a continuous casting machine is matched with the rolling rhythm of the bar line; distributing a charging route of the hot-charging steel billet, and adjusting the charging route of the hot-charging steel billet; a heat preservation device is additionally arranged on a hot conveying roller way, a steel billet hot conveying mode is set, and the charging temperature of hot conveying steel billets is increased. According to the method for efficiently reducing the high-carbon gas consumption of the bar, the casting rhythm of a continuous casting machine and the rolling rhythm of profile steel tend to be consistent, so that the hot delivery rate of a bar line is increased, hot delivery equipment and an operation method are improved, the average charging temperature during hot delivery is increased, the blast furnace gas consumption per ton of steel of the bar is reduced, and the production cost is reduced. The amount of pollutants discharged to the atmosphere is reduced, and energy conservation and emission reduction can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of section steel rolling, in particular to a method for efficiently saving the consumption of high-carbon gas for bars. Background Art

[0002] When producing bars, it is necessary to heat the temperature of the raw steel billet to above the recrystallization temperature of 1020 °C to reduce the deformation resistance of the steel billet during the forming process, so that the rolling equipment can operate safely under normal load conditions.

[0003] The raw steel billet is heated by a heating furnace burning blast furnace gas. The amount of blast furnace gas consumed by the heating furnace mainly depends on the starting temperature of the raw steel billet when it enters the furnace. The higher the starting temperature, the less gas is consumed. There are two ways to feed the raw steel billet for hot rolling section steel into the furnace. One is to feed it into the furnace in the form of cold billets. In this way, the blast furnace gas consumption per ton of steel can reach more than 0.9 GJ / t. The other is to feed it into the furnace in the form of hot delivery after continuous casting and molding. In this way, the blast furnace gas consumption per ton of steel is maintained at 0.30 - 0.65 GJ / t, and the higher the feeding temperature during hot delivery, the less blast furnace gas is consumed. Due to design limitations, the casting rhythm of the continuous caster is much greater than the rolling rhythm of the section steel rolling, resulting in a hot delivery rate of only about 50% for hot rolling section steel, and the highest hot delivery furnace inlet temperature is less than 700 °C.

[0004] For this reason, the blast furnace gas consumption per ton of steel for the bar line is maintained at 0.73 GJ / t. This is not only the main reason for the high energy consumption, but also an important reason for the large amount of atmospheric pollutant emissions. Summary of the Invention

[0005] In order to overcome the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a method for efficiently saving the consumption of high-carbon gas for bars, which makes the casting rhythm of the continuous caster tend to be consistent with the rolling rhythm of the section steel rolling, thereby improving the hot delivery rate of the bar line, improving the hot delivery equipment and operation method to increase the average furnace inlet temperature during hot delivery, and reducing the blast furnace gas consumption per ton of bars.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a method for efficiently saving the consumption of high-carbon gas for bars, including the following steps:

[0007] Set the rolling process of each specification rolling pass of the bar line, adjust the rolling speed, redistribute the load of the rolling equipment, and match the casting rhythm of the continuous caster with the rolling rhythm of the bar line;

[0008] Allocate the furnace inlet route of the hot delivery steel billet and adjust the furnace inlet route of the hot delivery steel billet;

[0009] Install a heat preservation device on the hot delivery roller table, set the hot delivery mode of the steel billet, and increase the furnace inlet temperature of the hot delivery steel billet.

[0010] As a further improvement of the present invention: The rolling process for setting the rolling passes of each specification of the bar line includes:

[0011] On the basis of the original use of rolling passes, additional rolling passes are added. The additional rolling passes cooperate with the original rolling passes in use to re - distribute the rolling pass routes of the rolling processes for bars of each specification in the bar line, and the rolling speed is adjusted.

[0012] As a further improvement of the present invention: The re - distribution of the rolling equipment load includes:

[0013] On the basis of the originally designed 18 rolling passes of the bar line, during actual production, for each specification of rolling passes, 2 additional rolling passes are added on the basis of the original 16 rolling passes in use. The rolling processes for bars of each specification in the bar line are optimized. The rolling equipment load is re - distributed by adding rolling passes to increase the rolling speed.

[0014] As a further improvement of the present invention: The adjustment of the hot - delivered billet charging route includes:

[0015] Change the charging method of the hot - delivered billet. Change the method of transporting the hot - delivered billet into the heating furnace for heating through the roller table and charging it into the east side of the heating furnace to the method of transporting it through the roller table and charging it into the west side of the heating furnace for heating.

[0016] As a further improvement of the present invention: The adjustment of the hot - delivered billet charging route also includes: At the position corresponding to the charging ports on the east and west sides of the bar heating furnace, a billet charging furnace door and hot - delivery conveying equipment are added. The west side of the heating furnace is close to the steelmaking continuous caster, and the hot - delivered billet is transported into the heating furnace for heating through the hot - delivery conveying equipment.

[0017] As a further improvement of the present invention: The hot - delivery conveying equipment includes a west - side hot - delivery roller table, a west - side lifting chain, and a west - side charging roller table. The hot - delivered billet is transported to the west - side lifting chain through the west - side hot - delivery roller table, lifted to the west - side charging roller table of the heating furnace by the lifting chain, and then the hot - delivered billet is transported into the heating furnace for heating by this roller table.

[0018] As a further improvement of the present invention: The adjustment of the hot - delivered billet charging route also includes: The length of the charging route on the west side is 37.77% of the length of the charging route on the east side.

[0019] As a further improvement of the present invention: The installation of a heat - preservation device on the hot - delivery roller table includes: Installing a heat - preservation cover on the west - side hot - delivery roller table, and setting the size of the continuous casting billet to 155mm×155mm×12m.

[0020] As a further improvement of the present invention: The setting of the billet hot - delivery mode includes: Setting the billet hot - delivery to deliver 3 billets each time.

[0021] As a further improvement of the present invention: when heating the cold billets of steel ingots in the furnace, it is preferred to feed the steel ingots with temperature from continuous casting of steelmaking into the furnace.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] The method for efficiently saving the consumption of high-carbon gas for bars of the present invention can make the casting rhythm of the continuous caster tend to be consistent with the rolling rhythm of the section steel, thereby improving the hot charging rate of the bar line, and improving the hot charging equipment and operation method to increase the average furnace charging temperature during hot charging, reduce the consumption of blast furnace gas per ton of steel for bars, reduce the amount of pollutants discharged into the atmosphere, and can achieve energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic flow chart of the method of the present invention.

[0025] Figure 2 It is a schematic flow chart of hot charging the hot charged steel billets of the present invention into the furnace. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to clearly and completely understand the technical solution, the present invention will be further described below in conjunction with the embodiments and the drawings. Obviously, the described embodiments are only part of the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0027] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0028] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0029] It should be further understood that the term "and / or" used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0030] In the present application, due to the problems that the casting rhythm of the continuous caster does not match the rolling rhythm of the bars and the average furnace charging temperature of the steel billets is low, both of these problems will lead to an increase in the consumption of blast furnace gas by the heating furnace.

[0031] Embodiments of the present invention provide a method for efficiently saving high-carbon gas consumption of bars, which makes the casting rhythm of the continuous caster tend to be consistent with the rolling rhythm of the section steel, thereby improving the hot charging rate of the bar line, improving the hot charging equipment and operation method to increase the average furnace charging temperature during hot charging, and reducing the blast furnace gas consumption per ton of bars.

[0032] The technical solution adopted by the present invention to solve its technical problems is: a method for efficiently saving high-carbon gas consumption of bars, including the following steps:

[0033] Set the rolling process of each specification rolling pass of the bar line, adjust the rolling speed, redistribute the load of the rolling equipment, and match the casting rhythm of the continuous caster with the rolling rhythm of the bar line;

[0034] Allocate the furnace charging route of the hot-charged billets and adjust the furnace charging route of the hot-charged billets;

[0035] Install a heat preservation device on the hot-charging roller table, set the hot-charging mode of the billets, and increase the furnace charging temperature of the hot-charged billets.

[0036] The method for efficiently saving high-carbon gas consumption of bars in this embodiment can make the casting rhythm of the continuous caster tend to be consistent with the rolling rhythm of the section steel by increasing the bar rolling efficiency, thereby improving the hot charging rate of the bar line, improving the hot charging equipment and operation method, shortening the hot charging route and setting a heat preservation device on the hot charging route to increase the average furnace charging temperature during hot charging, reduce the blast furnace gas consumption per ton of bars, reduce the amount of pollutants discharged into the atmosphere, and achieve energy conservation and emission reduction.

[0037] For better understanding, in an optional embodiment, the setting of the rolling process of each specification rolling pass of the bar line includes:

[0038] Increase the number of rolling passes on the basis of the original used rolling passes, and by cooperating with the original used rolling passes in the increased rolling passes, redistribute the rolling pass routes of the bar rolling processes of each specification of the bar line and adjust the rolling speed.

[0039] In this embodiment, with the increase in the number of rolling passes, the deformation amount allocated to each rolling pass will also become smaller, and the rolling load will also decrease. Increasing the number of rolling passes and reducing the deformation amount allocated to each rolling pass can make the billets deform more uniformly during rolling. Continuing to use the originally fixed rolling equipment passes will limit the rolling speed, resulting in a large consumption of blast furnace gas during the production process. After increasing the number of rolling passes, the uniformity of billet deformation is improved, which helps to improve the internal tissue structure of the product, reduce the internal stress concentration, and thus improve the dimensional accuracy of the bars. And without making any changes to the bar line, each pass of the bar line production is basically in a full-load operation state, and overloading will occur when the rolling speed is increased; after increasing the number of rolling passes, the rolling load is reduced, which can reduce the pressure and wear of each rolling equipment during rolling.

[0040] Further, the re - distribution of the rolling equipment load includes:

[0041] Based on the originally designed 18 rolling passes of the bar line, during actual production, for each specification of the rolling passes, 2 additional rolling passes are added on the basis of the original 16 used rolling passes, optimizing the rolling process for each specification of the bar line. By increasing the number of rolling passes, the load of the rolling equipment is re - distributed, and the rolling speed is increased.

[0042] When the bar line was originally designed, there were a total of 18 rolling passes on the rolling line, but during actual production, at most only 16 rolling passes would be used. According to this characteristic, the rolling process for each specification of the bar line can be optimized. By increasing the number of rolling passes, the load of the rolling equipment is re - distributed to increase the rolling speed. For each specification of the bar line, 2 additional rolling passes are added on the original basis. At this time, the average rolling speed is increased by at least 13%, and the rhythm of the continuous caster casting is basically matched with the rolling rhythm of the bar line.

[0043] For better understanding, in an optional embodiment, the adjustment of the hot - charged billet furnace - feeding route includes:

[0044] Changing the furnace - feeding method of the hot - charged billet. The method of the hot - charged billet being transported into the heating furnace through the roller table and heated by entering the furnace from the east side of the heating furnace is changed to the method of being transported into the heating furnace through the roller table and heated by entering the furnace from the west side of the heating furnace; the length of the furnace - feeding route on the west side is 37.77% of the length of the furnace - feeding route on the east side.

[0045] Further, a billet furnace - feeding door and a hot - charging conveying device are added at a position corresponding to the furnace - feeding opening on the west side of the bar heating furnace. The west side of the heating furnace is close to the steelmaking continuous caster, and the hot - charged billet is transported into the heating furnace for heating through the hot - charging conveying device. [[ID=*19]]

[0046] Even further, the hot - charging conveying device includes a west - side hot - charging roller table, a west - side lifting chain, and a west - side furnace - feeding roller table. The hot - charged billet is transported to the west - side lifting chain through the west - side hot - charging roller table, lifted to the west - side furnace - feeding roller table of the heating furnace by the lifting chain, and then transported into the heating furnace for heating by this roller table.

[0047] In this embodiment, the time for hot charging the billet into the furnace is reduced from 27 minutes to 5 minutes, which greatly speeds up the entry of the billet into the heating furnace, enabling the heating furnace to heat the billet more quickly, reducing the waiting time of the billet outside the furnace, and thus improving the efficiency of the entire bar production process and increasing the billet processing capacity per unit time. The hot charging temperature of the billet increases, the temperature difference to be heated after entering the heating furnace decreases, and the blast furnace gas consumption of the heating furnace is reduced. At the same time, due to the shortening of the billet charging time into the furnace, the time for heat dissipation from the heating furnace to the outside is also correspondingly reduced, enabling the heat in the heating furnace to be more effectively used for billet heating, improving the thermal efficiency of the heating furnace, and further reducing the consumption of high-carbon gas.

[0048] For better understanding, in an alternative embodiment, the installation of a heat preservation device on the hot charging roller table includes: installing a heat preservation cover on the west hot charging roller table and setting the size of the continuous casting billet to 155mm×155mm×12m.

[0049] In this embodiment, installing a heat preservation cover can increase the hot charging temperature of the billet into the furnace and allow more billets to be placed in the effective space of the heating furnace; the hot charging billet will dissipate heat to the surrounding environment during transportation, and installing a heat preservation cover can effectively block the outward heat dissipation and slow down the heat loss of the billet. Setting the size of the continuous casting billet to 155mm×155mm×12m, when the larger-sized continuous casting billet is heated in the heating furnace, the heating rate is relatively slow, but the temperature gradient during the heating process is small, which can improve the heating uniformity of the billet.

[0050] For better understanding, in an alternative embodiment, the setting of the billet hot charging mode includes: setting the billet hot charging to send 3 billets each time.

[0051] In this embodiment, in order to further reduce the waiting time of the hot charging billet at the lifting chain, the billet hot charging is changed from sending 4 billets each time to sending 3 billets each time. The number of billets hot charged each time is reduced, which reduces the load on equipment such as the lifting chain and the hot charging roller table during operation. And due to the reduction in the number of billets hot charged each time, when the equipment suddenly fails or abnormal situations occur, the degree of harm can be reduced.

[0052] As a further improvement of the present invention: when the cold billet is charged into the furnace for heating, the billets with temperature from steelmaking continuous casting are preferentially charged into the furnace.

[0053] In this embodiment, it is preferred to charge the hot billets from continuous casting into the furnace, which can reduce the amount of blast furnace gas required for heating. After the hot billets are charged into the furnace, since the billets themselves have a certain amount of heat, the time required for the heating furnace to heat them to the temperature required for rolling will be significantly shortened. To a certain extent, when cold billets are charged into the furnace, due to their low temperature, the temperature in the heating furnace will fluctuate greatly, affecting the stability of the temperature field in the heating furnace. However, preferentially charging hot billets can make the temperature change in the heating furnace more gentle, and it is easier to maintain the stability of the working conditions such as the combustion atmosphere and pressure in the furnace. Stable working conditions contribute to improving the combustion efficiency of the combustion equipment in the heating furnace, reducing the situation of incomplete fuel combustion, and further reducing energy consumption.

[0054] In the technical solution of the present invention

[0055] I. Aiming at the problem that the casting rhythm of the continuous caster does not match the rolling rhythm of the bar

[0056] To solve this problem, it is necessary to increase the rolling speed of each specification of the bar line. However, increasing the rolling speed will inevitably lead to an increase in the load of each rolling pass. However, without making any changes to the production line, the load of each pass during the production of the bar line is basically in a full-load operation state. Once the rolling speed is increased, an overload problem will immediately occur.

[0057] To achieve an increase in the rolling speed, it is necessary to ensure that the load of each rolling pass does not exceed the limit. The most effective method is to increase the number of rolling passes. Due to the increase in the number of rolling passes, the deformation amount allocated to each rolling pass will also become smaller, and the rolling load will also decrease, which leaves room for increasing the rolling speed. When the bar line was designed, there were a total of 18 rolling passes on the rolling line. During actual production, at most 16 rolling passes were used. According to this characteristic, by optimizing the rolling process of each specification of the bar line and redistributing the rolling equipment load by increasing the number of rolling passes, the rolling speed of the bar is increased. After the improvement, the number of rolling passes for each specification of the bar line has increased by 2 on the original basis. At this time, the average rolling speed has also increased by more than 13%, which basically realizes the matching of the casting rhythm of the continuous caster and the rolling rhythm of the bar line.

[0058] The casting speed of the continuous casting machine for steelmaking is between 4.5 m / s and 5 m / s. On average, about 90 continuous casting billets can be cast per hour. Before the improvement, the rolling speed of the φ18 mm specification deformed steel bars was 12.2 m / s, and about 72 continuous casting billets could be rolled per hour on average. On average, the number of continuous casting billets cast by the continuous casting machine per hour was at least 18 more than the number of billets consumed in bar rolling per hour. At this time, the billets were fed into the furnace in a hot delivery manner, which means that at least 18 billets could not be fed into the furnace and could only be taken offline and finally fed into the furnace in the form of cold billets. And rolling the φ18 mm specification requires 16 rolling mills (6 roughing mills, 4 intermediate rolling mills, and 6 finishing mills) for rolling. Since the number of rolling passes of the rolling equipment is fixed, there is no room for further increasing the rolling speed of the φ18 mm specification deformed steel bars. Under the existing conditions, the gap between the casting rhythm and the rolling rhythm cannot be changed, and the upper limit of the hot billets received by the heating furnace synchronously from the continuous casting machine during the rolling of the φ18 mm specification deformed steel bars is fixed. Therefore, the consumption of blast furnace gas during the production of the φ18 mm specification deformed steel bars is basically locked, which is also one of the main reasons for the high consumption of blast furnace gas per ton of steel during bar production. After the improvement, the number of rolling mills used for rolling the φ18 mm specification deformed steel bars was changed from 16 to 18 (6 roughing mills, 6 intermediate rolling mills, and 6 finishing mills). Due to the increase in the number of rolling passes, the rolling load of each pass was redistributed, making it possible to increase the rolling speed of the φ18 mm specification deformed steel bars. The rolling speed was increased from 12.2 m / s to 14 m / s, with a speed increase of 14.75%. The number of continuous casting billets rolled per hour on average also increased to about 84. Through the improvement, the rolling rhythm of the φ18 mm specification deformed steel bars has basically been able to match the casting rhythm of the billets, and the hot delivery rate of the continuous casting billets has also increased by about 30%.

[0059] II. Regarding the problem of low average furnace charging temperature of billets

[0060] The hot delivery billets cast from the continuous casting machine are transported to the hot delivery table by the hot delivery roller table for storage and then conveyed to the heating furnace for heating through the east side furnace charging roller table. The time taken for this process is about 27 minutes. The average billet temperature drops from 920 °C to about 700 °C. Since the hot delivery billets stay outside the heating furnace for too long, this exacerbates the temperature drop of the hot delivery billets. In order to increase the furnace charging temperature of the hot delivery billets, the furnace charging route of the hot delivery billets was optimized, and the hot delivery billets were changed from being charged into the furnace from the east side to the west side. After the improvement, the length of the furnace charging route is only 37.77% of the original. In addition, heat insulation covers were installed on the hot delivery roller table, and the size of the continuous casting billets was changed from 150 mm * 150 mm * 12 m to 155 mm * 155 mm * 12 m. In addition, the hot delivery mode of the billets was also optimized, and the hot delivery of billets was changed from delivering 4 billets each time to delivering 3 billets each time. Through this improvement, the time from the casting of the hot delivery billets by the continuous casting machine to the furnace charging was reduced from 27 minutes to 5 minutes. At this time, the average furnace charging temperature of the billets can reach above 850 °C, which is more than 150 °C higher than before the improvement.

[0061] The hot billets produced by steelmaking casting are transported to the lifting chain through the hot delivery roller table, lifted to the collecting table by the lifting chain for storage and transfer, and then transferred into the heating furnace for heating through the east-side furnace inlet roller table. This transportation route is as long as 96.65 m, resulting in the hot billets staying outside the heating furnace for about 27 minutes. The temperature of the hot billets cast by the continuous caster is about 920 °C, and when the hot billets enter the heating furnace, the temperature of the hot billets is already less than 700 °C. After the improvement, as Figure 2 shown, the billet inlet mode of the hot billets has changed. A billet inlet furnace door and hot delivery conveying equipment are newly added at the position corresponding to the east-side inlet of the bar heating furnace on the west side. This place is closer to the steelmaking continuous caster. The hot billets are transported to the newly added lifting chain through the hot delivery roller table, lifted to the west-side furnace inlet roller table of the newly added heating furnace by the lifting chain, and then the hot billets are transferred into the heating furnace for heating by this roller table. Through the improvement, the hot delivery transportation route is shortened to 36.5 m. In addition, a heat preservation cover is installed on the hot delivery roller table to reduce the heat loss of the hot billets. In order to load more billets in the effective space of the heating furnace, the size of the continuous casting billets is changed from 150 mm * 150 mm * 12 m to 155 mm * 155 mm * 12 m. In order to further reduce the waiting time of the hot billets at the lifting chain, the hot billet delivery is changed from delivering 4 billets each time to delivering 3 billets each time. Through this improvement, the time from the hot billets being cast by the continuous caster to entering the furnace is reduced from 27 minutes to 5 minutes. At this time, the average inlet temperature of the billets can reach above 850 °C, which is more than 150 °C higher than that before the improvement.

[0062] When the cold billets are heated in the furnace, the surface of the billets after steelmaking continuous casting is light red and the billet temperature is still about 400 °C. Prioritizing the entry of the billets with temperature after steelmaking continuous casting into the furnace can reduce the amount of blast furnace gas required for heating. And after the billets with temperature enter the furnace, since the billets themselves have a certain amount of heat, the time for the heating furnace to heat them to the required rolling temperature will be significantly shortened.

[0063] In summary, after those of ordinary skill in the art read the documents of the present invention, all other corresponding transformation schemes made without creative mental labor according to the technical solutions and technical concepts of the present invention belong to the scope protected by the present invention.

Claims

1. A method for efficiently saving high-carbon gas consumption of bars, characterized in that, It includes the following steps: Set the rolling process for each specification rolling pass of the bar line, adjust the rolling speed, redistribute the load of the rolling equipment, and match the casting rhythm of the continuous caster with the rolling rhythm of the bar line; Allocate the charging route of the hot-delivered billets and adjust the charging route of the hot-delivered billets; Install a heat preservation device on the hot delivery roller table, set the hot delivery mode of the billets, and increase the charging temperature of the hot-delivered billets.

2. The method for efficiently saving high-carbon gas consumption of bars according to claim 1, characterized in that, The setting of the rolling process for each specification rolling pass of the bar line includes: Based on the original used rolling passes, add rolling passes, and in cooperation with the original used rolling passes for the added rolling passes, redistribute the rolling pass routes of the rolling processes for each specification of the bar line and adjust the rolling speed.

3. A method for efficiently saving high-carbon gas consumption of bars according to claim 2, characterized in that, The redistribution of the load of the rolling equipment includes: Based on the originally designed 18 rolling passes of the bar line, during actual production, each specification rolling pass adds 2 rolling passes on the basis of the originally used 16 rolling passes, optimize the rolling processes for each specification of the bar line, redistribute the load of the rolling equipment by increasing the rolling passes, and increase the rolling speed.

4. A method for efficiently saving high-carbon gas consumption of bars according to claim 1, characterized in that, The adjustment of the charging route of the hot-delivered billets includes: Change the charging method of the hot-delivered billets, and change the method of transporting the hot-delivered billets into the heating furnace through the roller table and charging them into the heating furnace from the east side to the method of transporting them into the heating furnace through the roller table and charging them into the heating furnace from the west side.

5. The method for efficiently saving high-carbon gas consumption of bars according to claim 4, characterized in that, The adjustment of the charging route of the hot-delivered billets also includes: Add a billet charging furnace door and a hot delivery conveying device at the position corresponding to the charging openings on the west side and the east side of the bar heating furnace. The west side of the heating furnace is close to the steelmaking continuous caster, and the hot-delivered billets are transported into the heating furnace for heating through the hot delivery conveying device.

6. The method for efficiently saving high-carbon gas consumption of bars according to claim 5, characterized in that, The hot delivery conveying device includes a west side hot delivery roller table, a west side lifting chain, and a west side charging roller table. The hot-delivered billets are transported to the west side lifting chain through the west side hot delivery roller table, lifted to the west side charging roller table of the heating furnace by the lifting chain, and then transported into the heating furnace for heating by this roller table.

7. A method for efficiently saving high-carbon gas consumption of bar materials according to claim 6, characterized in that, The adjustment of the charging route of the hot-delivered billets also includes: the length of the charging route on the west side is 37.77% of the length of the charging route on the east side.

8. A method for efficiently saving high-carbon gas consumption of bar materials according to claim 7, characterized in that The installation of the heat preservation device on the hot delivery roller table includes: install a heat preservation cover on the west side hot delivery roller table, and set the size of the continuous casting billet to 155mm×155mm×12m.

9. The method for efficiently saving high-carbon gas consumption of bars according to claim 8, characterized in that, The setting of the hot delivery mode of the billets includes: set the hot delivery of the billets to deliver 3 billets each time.

10. A method for efficiently saving high-carbon gas consumption of bars according to claim 1, characterized in that, When cold billets are charged into the furnace for heating, give priority to charging the billets with temperature from the steelmaking continuous caster into the furnace.

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