A continuous casting and rolling production device and a continuous casting and rolling production method

Abstract

This invention relates to a continuous casting and rolling production equipment and method. The continuous casting and rolling production equipment includes a multi-strand continuous casting machine, a rolling mill, a feed roller conveyor, a heating device, and multiple heat insulation covers. One end of the feed roller conveyor is connected to the multi-strand continuous casting machine, and the other end is connected to the rolling mill. The heating device is located between the multi-strand continuous casting machine and the rolling mill. The heating device includes a heating roller conveyor and a heating assembly. Both ends of the heating roller conveyor are connected to the feed roller conveyor, and the heating assembly is mounted on the heating roller conveyor. Multiple heat insulation covers are arranged sequentially along the extension direction of the feed roller conveyor and the heating roller conveyor. At least two of the heat insulation covers are equipped with temperature sensors to detect the temperature of the cast billet, and two of the heat insulation covers with temperature sensors are located upstream of the heating device. This method allows the cast billet to be diverted during the conveying process; the higher-temperature billet is directly sent to the rolling mill, while the lower-temperature billet is sent to the heating device for heating. This is beneficial for improving the feeding rhythm of the rolling mill and reducing energy consumption and costs.

Description

Technical Field

[0001] This invention relates to the field of steel rolling technology, and in particular to a continuous casting and rolling production equipment and a continuous casting and rolling production method. Background Technology

[0002] Continuous casting and rolling is a widely recognized economical and efficient steel processing technology in the steel rolling industry. Its main process involves using a continuous casting machine to continuously pour molten steel at high temperatures into cast steel of a specific size, which is then sheared to form a billet of a certain length. The billet is directly conveyed to a rolling mill via a conveyor roller conveyor for rolling processing. Existing continuous casting machines mainly include single-strand continuous casting machines and multi-strand continuous casting machines. In the production process, especially in the processing of long billets with large dimensions, when using a single-strand continuous casting machine, the billet drawing speed of the continuous casting machine is limited. Due to the long drawing time of the continuous casting machine, the billet output cycle of the single-strand continuous casting machine is much longer than the rolling cycle of the rolling mill. This results in a mismatch between the production rhythm of the continuous casting machine and the rolling mill, leading to low production efficiency. When using a multi-strand continuous casting machine, the multi-strand continuous casting machine can produce multiple billets simultaneously. This results in a billet output cycle of the multi-strand continuous casting machine being much shorter than the rolling cycle of the rolling mill. The billet waiting time is long, and the temperature of the billet drops significantly. It needs to be sent to a heating furnace for reheating before rolling, resulting in fuel waste and increased production costs. Summary of the Invention

[0003] The purpose of this invention is to provide a continuous casting and rolling production equipment and method, which has high production efficiency and helps to save energy consumption and production costs.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A continuous casting and rolling production equipment is provided, comprising:

[0006] Multi-strand continuous casting machine, used to produce cast billets;

[0007] A rolling mill used to roll the cast billet;

[0008] The material conveyor roller conveyor is connected at one end to the multi-strand continuous casting machine and at the other end to the rolling mill. The material conveyor roller conveyor is used to convey the billet.

[0009] A reheating device is located between the multi-strand continuous casting machine and the rolling mill. The reheating device includes a reheating roller table and a heating assembly. Both ends of the reheating roller table are connected to the material conveying roller table. The heating assembly is disposed on the reheating roller table and is used to heat the billet.

[0010] Multiple heat insulation covers are arranged sequentially along the extension direction of the material conveying roller and the heat replenishing roller. The heat insulation covers are used to heat the billet. At least two of the heat insulation covers are equipped with temperature measuring devices to detect the temperature of the billet. Two of the heat insulation covers equipped with temperature measuring devices are located upstream of the heat replenishing device.

[0011] Furthermore, at least two temperature sensors are installed on the insulation cover, one of which is located near the top of the insulation cover and the other is located near the bottom of the insulation cover, so that the two temperature sensors can detect the temperature of the top surface and the side surface of the casting respectively.

[0012] Furthermore, it also includes a purging device, which includes an air pipe and an air pump installed on the air pipe. Along the conveying direction of the billet, the air inlet of the air pipe is located at the end of the heat insulation cover near the multi-strand continuous casting machine, and the air outlet of the air pipe is located at the end of the heat insulation cover near the rolling mill. Both the air inlet and outlet of the air pipe are connected to the interior of the heat insulation cover. The air outlet of the air pipe is used to spray gas toward the temperature measuring area on the billet corresponding to the temperature measuring device.

[0013] Furthermore, the purging device also includes a filter disposed on the air pipe, the filter being used to filter the gas flowing through the air pipe.

[0014] Furthermore, the purging device also includes a sensor mounted on the insulation cover, the sensor being used to detect the position of the billet, and the sensor being electrically connected to the air pump.

[0015] Furthermore, the two insulation covers equipped with the temperature measuring devices are spaced apart along the conveying direction of the billet.

[0016] Furthermore, a temperature sensor is installed on one of the insulation covers located between the heating device and the rolling mill.

[0017] A continuous casting and rolling production method is also provided, and a continuous casting and rolling production equipment is provided. In the continuous casting and rolling production equipment, two heat insulation covers located upstream of the heating device and equipped with temperature measuring devices are respectively set as the first temperature measuring point and the second temperature measuring point. The billet passes through the first temperature measuring point and the second temperature measuring point in sequence. The temperature T1 of the billet at the first temperature measuring point and the temperature T2 of the billet at the second temperature measuring point are detected. The temperature T3 of the billet when it is delivered to the rolling mill is estimated by the temperature difference between the first temperature measuring point and the second temperature measuring point.

[0018] When the temperature T3 is higher than the set temperature during the rolling of the billet, the billet is directly conveyed to the rolling mill via the conveyor rollers;

[0019] When the temperature T3 is lower than the set temperature during the rolling of the billet, the billet is conveyed to the reheating device, which heats the billet before conveying it to the rolling mill.

[0020] Furthermore, along the conveying direction of the billet, the temperature Ta of the top surface of the billet, and the temperatures Tb and Tc of the left and right sides of the billet are detected, where T1 = (Ta + Tb + Tc) / 3 and T2 = (Ta + Tb + Tc) / 3.

[0021] Furthermore, when the billet enters the insulation cover, the high-temperature gas above the billet is extracted by the purging device and sprayed onto the temperature measuring area on the billet.

[0022] The advantages of this invention compared to the prior art are:

[0023] This invention discloses a continuous casting and rolling production equipment and method. Utilizing a multi-strand continuous casting machine to produce billets, it shortens the billet production cycle, meeting the rolling mill's material supply requirements and increasing the mill's rolling workload. By installing temperature sensors in two insulation hoods upstream of the reheating device, the temperature of the billet as it passes through the corresponding insulation hood can be detected. The detected temperature value determines whether reheating is required. When the billet temperature meets the rolling process requirements, it is directly conveyed to the rolling mill via the feed roller conveyor. When the billet temperature does not meet the rolling process requirements, it is conveyed to the reheating device for heating treatment before being conveyed to the rolling mill. This method diverts the billet during transport, allowing a portion of the higher-temperature billets (meeting the rolling process temperature requirements) to be directly conveyed to the rolling mill, thus improving the mill's material supply rhythm and increasing the production efficiency of the continuous casting and rolling equipment. Another portion of the lower-temperature slabs (i.e. those that do not meet the rolling process temperature requirements) are sent to a reheating device for reheating, avoiding the need to heat all the slabs, which helps reduce energy consumption and save production costs. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram of a continuous casting and rolling production equipment according to an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the heat insulation cover according to an embodiment of the present invention.

[0027] Figure 3This is a cross-sectional view of the heat insulation cover according to an embodiment of the present invention.

[0028] In the picture:

[0029] 1. Multi-strand continuous casting machine; 2. Feed roller conveyor; 21. Frame; 22. Roller; 3. Heating device; 30. Heating roller conveyor; 31. Heating assembly; 32. Transverse assembly; 4. Rolling mill; 5. Insulation cover; 51. First insulation cover; 52. Second insulation cover; 53. Third insulation cover; 54. Fourth insulation cover; 6. Temperature sensor; 7. Purge device; 71. Air pipe; 72. Filter; 73. Air tank; 74. Nozzle; 75. Sensor; 8. Cast billet. Detailed Implementation

[0030] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] like Figures 1 to 3 As shown, this invention provides a continuous casting and rolling production equipment applied to the steel processing and forming process. Continuous casting and rolling is an existing steel processing technology, in which cast steel material pulled out by a continuous casting machine is fed into a billet 8, which is then directly transported to the rolling mill for rolling. Since the billet 8 itself has a certain temperature, the heating energy consumption of the billet 8 before rolling can be reduced. The continuous casting and rolling production equipment includes a multi-strand continuous casting machine 1, a conveyor roller conveyor 2, a heating device 3, a rolling mill 4, and a heat insulation cover 5. The multi-strand continuous casting machine 1 and the rolling mill 4 are both existing technologies. The multi-strand continuous casting machine 1 is used to cast the billet 8, and can simultaneously cast multiple billets 8. The rolling mill 4 is used to roll the billet 8. The conveyor roller conveyor 2 includes a frame 21 and several rollers 22 mounted on the frame 21. The conveyor roller conveyor 2 is used to transport the billet 8. Figure 1The direction indicated by the middle arrow is the conveying direction of the billet 8. One end of the conveyor roller conveyor 2 is connected to the multi-strand continuous casting machine 1, and the other end is connected to the rolling mill 4, so that the billet 8 produced by the multi-strand continuous casting machine 1 can be conveyed to the rolling mill 4 through the conveyor roller conveyor 2. Several rollers 22 in the conveyor roller conveyor 2 are distributed at intervals along the conveying direction of the billet 8. The billet 8 is placed on the rollers 22, and the billet 8 is conveyed by rotating the rollers 22. The heating device 3 is used to heat the billet 8 so that the temperature of the billet 8 meets the requirements of the rolling process. The heating device 3 includes a heating roller conveyor 30 and a heating assembly 31. The structure of the heating roller conveyor 30 is the same as that of the conveyor roller conveyor 2, and both ends of the heating roller conveyor 30 are connected to the conveyor roller conveyor 2. The heating assembly 31 is set on the heating roller conveyor 30 and is used to heat the billet 8 entering the heating roller conveyor 30. The heat insulation cover 5 serves to keep the billet 8 warm. Heat insulation covers 5 are installed on both the material conveying roller conveyor 2 and the reheating roller conveyor 30. Multiple heat insulation covers 5 are arranged sequentially along the extension direction of the material conveying roller conveyor 2 and the reheating roller conveyor 30 (i.e., the conveying direction of the billet 8). By installing the heat insulation covers 5, heat loss of the billet 8 during the conveying process is reduced.

[0032] Of the multiple heat insulation covers 5, at least two are equipped with temperature sensors 6, which are existing technologies. These temperature sensors 6 are used to detect the temperature of the cast billet 8. Two of the heat insulation covers 5 equipped with temperature sensors 6 are located upstream of the heating device 3. In this embodiment, four heat insulation covers 5 are equipped with temperature sensors 6: a first heat insulation cover 51, a second heat insulation cover 52, a third heat insulation cover 53, and a fourth heat insulation cover 54. The first, second, and fourth heat insulation covers 51, 52, and 54 are mounted on the conveyor roller conveyor 2. The first and second heat insulation covers 51 and 52 are located between the heating device 3 and the multi-strand continuous casting machine 1, and the fourth heat insulation cover 54 is located between the heating device 3 and the rolling mill 4. The third heat insulation cover 53 is mounted on the heating roller conveyor 30 and is located downstream of the heating assembly 31. The temperature sensors 6 are radiation thermometers to achieve non-contact temperature measurement of the cast billet 8.

[0033] It is understandable that using a multi-strand continuous casting machine 1 to produce billets 8 helps shorten the production cycle of billets 8, thereby meeting the material supply requirements of the rolling mill 4 and making the rolling workload of the rolling mill 4 more saturated. By installing temperature measuring devices 6 in the two heat insulation covers 5 upstream of the heating device 3, the temperature of the billet 8 as it passes through the corresponding heat insulation cover 5 can be detected. Based on the detected temperature value, it is determined whether the billet 8 needs to be reheated. When the temperature of the billet 8 meets the rolling process requirements, the billet 8 is directly conveyed to the rolling mill 4 for rolling via the conveyor roller table 2. When the temperature of the billet 8 does not meet the rolling process requirements, the billet 8 is conveyed to the heating device 3 for heating treatment, and then conveyed to the rolling mill 4 for rolling after heating. This method diverts the billet 8 during the conveying process, allowing a portion of the billets 8 with higher temperatures (i.e., meeting the rolling process temperature requirements) to be directly conveyed to the rolling mill 4, thereby improving the material supply rhythm of the rolling mill 4 and increasing the production efficiency of the continuous casting and rolling production equipment. Another portion of the lower-temperature slabs 8 (i.e. those that do not meet the rolling process temperature requirements) are transported to the reheating device 3 for reheating, thus avoiding the need to heat all the slabs 8, which helps to reduce energy consumption and save production costs.

[0034] Reference Figure 2 and Figure 3 As shown, the heat insulation cover 5 has a semi-circular cross-section. The heat insulation cover 5 is made of heat-insulating material and is positioned above the material conveying roller conveyor 2 or the heat replenishing roller conveyor 30, so that channels for the billet 8 to pass through are formed between the material conveying roller conveyor 2 and the heat insulation cover 5, and between the heat replenishing roller conveyor 30 and the heat insulation cover 5. The billet 8 is conveyed within these channels.

[0035] Specifically, at least two temperature sensors 6 are installed on the first insulation cover 5 to detect the temperature of the top and side surfaces of the billet 8. In this embodiment, three temperature sensors 6 are installed on the first insulation cover 5. One temperature sensor 6 is located near the top of the first insulation cover 5 and is used to detect the temperature of the top surface of the billet 8. The other two temperature sensors 6 are located near the bottom of the first insulation cover 5, and are respectively located on both sides of the width direction of the first insulation cover 5. The width direction of the first insulation cover 5 is perpendicular to the conveying direction of the billet 8. The two temperature sensors 6 located at the bottom detect the temperature of the two opposite sides of the billet 8. It is understood that the billet 8 will cool down during conveying, and there will be temperature differences on different surfaces of the billet 8. By setting multiple temperature sensors 6, the temperature of different areas of the billet 8 can be measured, and then the average temperature of each area can be used as the temperature value of the billet 8 when it is conveyed to the first insulation cover 51. It should be noted that the installation method of the temperature measuring device 6 on the second insulation cover 52, the third insulation cover 53 and the fourth insulation cover 54 is the same as that on the first insulation cover 51, and will not be described again here.

[0036] Specifically, the continuous casting and rolling production equipment also includes a purging device 7, which is installed on the first insulation cover 51, the second insulation cover 52, the third insulation cover 53, and the fourth insulation cover 54. Alternatively, it can be understood that the insulation cover 5 equipped with the temperature sensor 6 is correspondingly equipped with a purging device 7. Taking the first insulation cover 51 as an example, the specific structure of the purging device 7 will now be described. The purging device 7 includes an air pipe 71, an air pump, a filter 72, an air storage tank 73, and a sensor 75. Figure 2 The direction indicated by the middle arrow is the conveying direction of the billet 8. Along the conveying direction of the billet 8, the inlet end of the air pipe 71 is located at the end of the first insulation shroud 51 near the multi-strand continuous casting machine 1, and the outlet end of the air pipe 71 is located at the end of the first insulation shroud 51 near the rolling mill 4. When the billet 8 enters the first insulation shroud 51, it first passes through the inlet end of the air pipe 71, and then through the outlet end. Both the inlet and outlet ends of the air pipe 71 are connected to the interior of the first insulation shroud 51. The outlet end of the air pipe 71 extends into the channel of the first insulation shroud 51, and is equipped with three nozzles 74. Each of the three nozzles 74 corresponds to one of the three temperature measuring devices 6. The orientation of the nozzles 74 is the same as that of the temperature measuring devices 6. When the billet 8 is conveyed to the position of the temperature measuring device 6, the temperature measuring device 6 measures the temperature of the billet 8. Gas is blown from the air pipe 71 through the nozzle 74 towards the temperature measuring area on the billet 8 corresponding to the temperature measuring device 6. The blown gas removes oxide scale, water mist, dust, etc., from the temperature measuring area of ​​the billet 8, ensuring the accuracy of the temperature measurement of the billet 8 by the temperature measuring device 6. An air pump is installed on the air pipe 71 to drive the gas flow along the air pipe 71. A filter 72 is installed on the air pipe 71 to filter the gas flowing through the air pipe 71, removing impurities such as oxide scale and dust. An air storage tank 73 is installed on the air pipe 71, downstream of the filter 72. The air storage tank 73 is used to temporarily store the filtered gas. A sensor 75 is installed on the inner wall of the first insulation cover 51 to check the position of the billet 8. The sensor 75 can be a laser sensor, ultrasonic sensor, or temperature sensor, etc. The sensor 75 detects whether the billet 8 is located at the air inlet end of the air pipe 71. The sensor 75 is electrically connected to the air pump.

[0037] It is understandable that the air inlet of the air pipe 71 is connected to the interior of the first insulation cover 51, so that the gas used for blowing the billet 8 comes from inside the first insulation cover 51. The gas used for blowing has a high temperature, avoiding the actual temperature of the temperature measurement area being affected by the low temperature of the blowing gas, thereby ensuring the temperature measurement accuracy. The sensor 75 is located at the end of the first insulation cover 51 near the multi-flow continuous casting machine 1. When the billet 8 enters the first insulation cover 51, the sensor 75 detects that the billet 8 is below the air inlet of the air pipe 71. The detection data of the sensor 75 is transmitted to the air pump. Correspondingly, the air pump is equipped with a circuit board that controls the start and stop of the air pump. The circuit board is electrically connected to the sensor 75. The circuit board receives the detection data of the sensor 75 and controls the air pump to start according to the detection data. The air pipe 71 draws in the high-temperature gas above the billet 8. The high-temperature gas is filtered by the filter 72 and then delivered to the air storage tank 73. Finally, when the billet 8 moves to the position of the temperature sensor 6, the temperature sensor 6 measures the temperature of the billet 8. At the same time, high-temperature gas is sprayed through nozzle 74 to the temperature measuring area on the billet 8.

[0038] Specifically, the first heat insulation cover 51 and the second heat insulation cover 52 are spaced apart along the conveying direction of the billet 8. It can be understood that by adding the first heat insulation cover 51 and the second heat insulation cover 52 spaced apart between the continuous casting machine 1 and the reheating device 3, a certain distance is maintained between them. Since the billet 8 experiences a temperature drop during conveying, the theoretical temperature value of the billet 8 when it is conveyed to the rolling mill 4 can be estimated by using the temperature difference data of the billet 8 from the first heat insulation cover 51 to the second heat insulation cover 52, combined with the distance between the first heat insulation cover 51 and the second heat insulation cover 52, and the distance between the second heat insulation cover 52 and the rolling mill 4. This allows for the determination of whether the temperature of the billet 8 at the rolling mill 4 meets the rolling process requirements. For example, the temperature of the billet 8 inside the first heat insulation cover 51 is T1, where T1 = 950℃; the temperature of the billet 8 inside the second heat insulation cover 52 is T2, where T2 = 940℃. The distance between the first insulation cover 51 and the second insulation cover 52 is 20m, meaning that the temperature of the billet 8 decreases by 10℃ for every 20m it is conveyed. Assuming the distance between the second insulation cover 52 and the rolling mill 4 is 100m, the estimated temperature of the billet 8 when it reaches the rolling mill 4 is T3, where T3 = 890℃. In practical applications, the estimated temperature T3 of the billet 8 is used to determine whether reheating of the billet 8 is necessary.

[0039] Specifically, refer to Figure 1As shown, a fourth heat insulation cover 54 is installed between the heating device 3 and the rolling mill 4. A temperature sensor 6 is installed on the fourth heat insulation cover 54 to measure the temperature of the billet 8 being conveyed to the end of the feed roller conveyor 2. The fourth heat insulation cover 54 is located adjacent to the rolling mill 4. By detecting the temperature of the billet 8 about to enter the rolling mill 4, the actual temperature of the billet 8 at its position on the rolling mill 4 is determined. If the actual temperature of the billet 8 meets the rolling process requirements, it can be directly fed into the rolling mill 4 for rolling; if the actual temperature of the billet 8 does not meet the rolling process requirements, it is removed from the feed roller conveyor 2 and transported back to the beginning of the feed roller conveyor 2 for reheating.

[0040] Specifically, refer to Figure 1 As shown, the reheating device 3 also includes two transverse shifting components 32. The transverse shifting components 32 are existing technology, and their structure is similar to that of the conveying roller conveyor 2. They consist of multiple rollers 22 arranged sequentially and are used to convey the billet 8. The conveying direction of the transverse shifting components 32 is perpendicular to the conveying direction of the conveying roller conveyor 2. The transverse shifting components 32 can be raised and lowered relative to the conveying roller conveyor 2 to transfer the billet 8 from the conveying roller conveyor 2 to the transverse shifting components 32. The two transverse shifting components 32 are respectively located at both ends of the reheating roller conveyor 30, meaning that both ends of the reheating roller conveyor 30 are connected to the conveying roller conveyor 2 via the transverse shifting components 32. The reheating roller conveyor 30 is parallel to the conveying roller conveyor 2 so that the billet 8 continues to move towards the rolling mill 4 during the reheating process. A third heat preservation cover 53 is installed on the reheating roller conveyor 30, and a temperature sensor 6 on the third heat preservation cover 53 measures the temperature of the billet 8 to detect whether the billet 8 has been heated to the temperature required by the rolling process.

[0041] like Figure 1As shown, a continuous casting and rolling production method is also provided. Continuous casting and rolling production equipment is provided for continuously casting and rolling a billet 8. In the continuous casting and rolling production equipment, two insulation covers 5 located upstream of the heating device 3 and equipped with temperature measuring devices 6 are respectively designated as the first temperature measuring point and the second temperature measuring point. Alternatively, the first insulation cover 51 can be understood as the first temperature measuring point, and the second insulation cover 52 as the second temperature measuring point. During the conveying process of the billet 8 towards the rolling mill 4, the billet 8 can sequentially pass through the first temperature measuring point and the second temperature measuring point. When the billet 8 passes through the first temperature measuring point, the temperature T1 of the billet 8 at the first temperature measuring point is detected by the temperature measuring device 6 on the first insulation cover 51. When the billet 8 passes through the second temperature measuring point, the temperature T2 of the billet 8 at the second temperature measuring point is detected by the temperature measuring device 6 on the second insulation cover 52. The temperature T3 of the billet 8 when it is conveyed to the rolling mill 4 is estimated by the temperature difference between the first and second temperature measuring points. In this embodiment, the principle for estimating temperature T3 is that the temperature of the billet 8 decreases at a constant rate during transport, meaning that the temperature change of the billet 8 is related to the transport distance. Specifically, the distance between the first insulation cover 51 and the second insulation cover 52 is L1, and the distance between the second insulation cover 52 and the rolling mill 4 is L2. The temperature of the billet 8 is calculated as follows: (T1 - T2) / L1 = (T2 - T3) / L2.

[0042] When rolling the billet 8, the billet 8 should reach a certain temperature. The temperature required for rolling the billet 8 is the set temperature of the billet 8 in the rolling process. In specific applications, the set temperature of the billet 8 during rolling is different for billets 8 made of different materials. When the estimated temperature T3 of the billet 8 is higher than the set temperature of the billet 8 during rolling, the billet 8 is directly conveyed to the rolling mill 4 through the conveying roller table 2 for rolling. When the estimated temperature T3 of the billet 8 is lower than the set temperature of the billet 8 during rolling, the billet 8 is conveyed to the heating device 3 for heating treatment. The temperature of the billet 8 after being heated by the heating device 3 must meet the rolling process requirements. The heated billet 8 is then conveyed to the rolling mill 4 through the heating roller table 30 and the conveying roller table 2 in sequence. It should be noted that the temperature of the billet 8 after being heated in the heating device 3 should take into account the distance between the heating component 31 and the rolling mill 4, so that when the billet 8 is conveyed from the heating component 31 to the rolling mill 4, its temperature still meets the rolling process requirements.

[0043] Understandably, by measuring the temperature of the billet 8 at the first and second temperature measuring points, data on the temperature change of the billet 8 during the conveying process is obtained, and the temperature T3 of the billet 8 when it is conveyed to the rolling mill 4 is estimated. When the temperature T3 of the billet 8 meets the rolling process requirements, it is directly conveyed to the rolling mill 4 via the conveyor roller 2 for rolling. When the temperature T3 of the billet 8 does not meet the rolling process requirements, it is conveyed to the reheating device 3 for reheating, so that the temperature of the billet 8 meets the rolling process requirements before being conveyed to the rolling mill 4 for rolling. This method diverts the flow of the billet 8 during conveying. A portion of the billet 8 with higher temperatures can be directly conveyed to the rolling mill 4, thereby improving the feeding rhythm of the rolling mill 4 and increasing production efficiency. The other portion of the billet 8 with lower temperatures is conveyed to the reheating device 3 for reheating, avoiding heating all the billets 8, which helps to reduce energy consumption and save production costs.

[0044] Specifically, along the conveying direction of the billet 8, the temperature Ta of the top surface of the billet 8 and the temperatures of the left and right sides of the billet 8 are detected, where the temperature on the left side is Tb and the temperature on the right side is Tc. The detected temperature of the billet 8 at the first or second temperature measuring point is the average of the three side temperatures. That is, the temperature of the billet 8 at the first temperature measuring point T1 = (Ta + Tb + Tc) / 3, and the temperature of the billet 8 at the second temperature measuring point T2 = (Ta + Tb + Tc) / 3.

[0045] Specifically, during the conveying process, the length direction of the billet 8 is parallel to the conveying direction. Along the length direction of the billet 8, the billet 8 includes a front section, a middle section, and a rear section connected in sequence. During temperature measurement, the temperature of the front section, the middle section, and the rear section of the billet 8 are measured separately. For example, at the first temperature measurement point, the temperature of the front section of the billet 8 is T11, the temperature of the middle section is T12, and the temperature of the rear section is T13. Correspondingly, T11, T12, and T13 are the average values ​​of the temperatures of the three sides of the billet 8. During the conveying process of the billet 8, if the temperature value of any one of the front, middle, or rear sections of the billet 8 does not meet the rolling process requirements, the billet 8 needs to be conveyed to the reheating device 3 for reheating. To further save energy consumption, since the front, middle, and rear sections of the billet 8 are measured separately, during heating, only the section of the billet 8 whose temperature does not meet the rolling process requirements can be heated.

[0046] Of course, to ensure that the billet 8 meets the process requirements during rolling, a fourth temperature measuring point is set at the end of the feed roller conveyor 2, that is, at the position of the feed roller conveyor 2 near the rolling mill 4. Correspondingly, the fourth heat insulation cover 54 is set as the fourth temperature measuring point. The temperature measuring method of the fourth temperature measuring point is the same as that of the first temperature measuring point, and will not be repeated here. It can be understood that the estimated temperature value T3 is obtained from theoretical calculation. In actual application, the actual temperature of the billet 8 at the position of the rolling mill 4 deviates from the theoretical temperature. By measuring the temperature at the fourth temperature measuring point, the actual temperature of the billet 8 when it is conveyed to the position of the rolling mill 4 can be measured. When the actual temperature of the billet 8 does not meet the process requirements, the billet 8 is removed from the production line and sent back to the reheating device 3 for reheating treatment.

[0047] Correspondingly, the third insulation cover 53 on the reheating roller conveyor 30 is set as the third temperature measuring point. The temperature measuring method of the third temperature measuring point is the same as that of the first temperature measuring point, and will not be described again here. The third temperature measuring point is used to detect whether the temperature of the billet 8 after heating meets the requirements of the rolling process.

[0048] Specifically, when the billet 8 enters the first insulation cover 51, the second insulation cover 52, the third insulation cover 53, and the fourth insulation cover 54 for temperature measurement, the high-temperature gas above the billet 8 is extracted by the purging device 7 and sprayed onto the temperature measurement area of ​​the billet 8. Taking the billet 8 at the first temperature measurement point as an example, when the billet 8 enters the first insulation cover 51, the air pipe 71 of the purging device 7 extracts high-temperature gas from above the billet 8. The high-temperature gas is filtered and stored in the air storage tank 73. When the billet 8 moves to the position of the temperature sensor 6, the temperature sensor 6 starts measuring the temperature, and the air pipe 71 sprays high-temperature gas onto the temperature measurement area on the billet 8. The high-temperature gas removes oxide scale, moisture, dust, etc. around the billet 8, thereby improving the detection accuracy of the temperature sensor 6.

[0049] The beneficial effects of this embodiment are as follows: By using a multi-strand continuous casting machine 1 to produce the billet 8, the production cycle of the billet 8 is shortened, thus meeting the material supply requirements of the rolling mill 4 and making the rolling workload of the rolling mill 4 more saturated. By installing temperature measuring devices 6 in the two heat insulation covers 5 upstream of the heating device 3, the temperature of the billet 8 when passing through the corresponding heat insulation cover 5 can be detected by the temperature measuring devices 6. The detection temperature value determines whether the billet 8 needs to be reheated. When the temperature of the billet 8 meets the rolling process requirements, the billet 8 is directly conveyed to the rolling mill 4 for rolling through the conveying roller table 2. When the temperature of the billet 8 does not meet the rolling process requirements, the billet 8 is conveyed to the heating device 3 for heating treatment, and then conveyed to the rolling mill 4 for rolling after heating. This method diverts the billet 8 during the conveying process, allowing a portion of the billets 8 with higher temperatures (i.e., meeting the rolling process temperature requirements) to be directly conveyed to the rolling mill 4, thereby improving the material supply rhythm of the rolling mill 4 and increasing the production efficiency of the continuous casting and rolling production equipment. Another portion of the lower-temperature slabs 8 (i.e. those that do not meet the rolling process temperature requirements) are transported to the reheating device 3 for reheating, thus avoiding the need to heat all the slabs 8, which helps to reduce energy consumption and save production costs.

[0050] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A continuous casting and rolling production equipment, characterized in that, include: Multi-strand continuous casting machine, used to produce cast billets; A rolling mill used to roll the cast billet; The material conveyor roller conveyor is connected at one end to the multi-strand continuous casting machine and at the other end to the rolling mill. The material conveyor roller conveyor is used to convey the billet. A reheating device is located between the multi-strand continuous casting machine and the rolling mill. The reheating device includes a reheating roller table and a heating assembly. Both ends of the reheating roller table are connected to the material conveying roller table. The heating assembly is disposed on the reheating roller table and is used to heat the billet. Multiple heat insulation covers are arranged sequentially along the extension direction of the material conveying roller and the heat replenishing roller. The heat insulation covers are used to heat the billet. At least two of the heat insulation covers are equipped with temperature measuring devices to detect the temperature of the billet. Two of the heat insulation covers equipped with temperature measuring devices are located upstream of the heat replenishing device. Two heat insulation covers located upstream of the heating device and equipped with temperature measuring devices are designated as the first temperature measuring point and the second temperature measuring point, respectively. The billet passes through the first temperature measuring point and the second temperature measuring point in sequence. The temperature T1 of the billet at the first temperature measuring point is detected. The temperature T2 of the billet at the second temperature measuring point is detected. The temperature T3 of the billet when it is conveyed to the rolling mill is estimated by the temperature difference between the first temperature measuring point and the second temperature measuring point. When the temperature T3 is higher than the set temperature during billet rolling, the billet is directly conveyed to the rolling mill via the conveyor rollers for rolling; when the temperature T3 is lower than the set temperature during billet rolling, the billet is conveyed to the heating device for heating treatment. After being heated by the heating device, the temperature of the billet reaches the rolling process requirements, and the heated billet is then conveyed to the rolling mill. It also includes a purging device, which extracts the high-temperature gas above the casting billet when the casting billet enters the heat preservation cover, and sprays the high-temperature gas onto the temperature measuring area on the casting billet.

2. The continuous casting and rolling production equipment according to claim 1, characterized in that, At least two temperature sensors are installed on the insulation cover, one of which is located near the top of the insulation cover and the other is located near the bottom of the insulation cover, so that the two temperature sensors can detect the temperature of the top surface and the side surface of the billet respectively.

3. The continuous casting and rolling production equipment according to claim 2, characterized in that, The purging device includes an air pipe and an air pump mounted on the air pipe. Along the conveying direction of the billet, the air inlet of the air pipe is located at the end of the heat insulation cover near the multi-strand continuous casting machine, and the air outlet of the air pipe is located at the end of the heat insulation cover near the rolling mill. Both the air inlet and outlet of the air pipe are connected to the interior of the heat insulation cover. The air outlet of the air pipe is used to spray gas toward the temperature measuring area on the billet corresponding to the temperature measuring device.

4. The continuous casting and rolling production equipment according to claim 3, characterized in that, The purging device further includes a filter disposed on the air pipe, which is used to filter the gas flowing through the air pipe.

5. The continuous casting and rolling production equipment according to claim 3, characterized in that, The purging device also includes a sensor mounted on the insulation cover. The sensor is used to detect the position of the billet and is electrically connected to the air pump.

6. The continuous casting and rolling production equipment according to claim 1, characterized in that, Two heat insulation covers equipped with the temperature measuring devices are spaced apart along the conveying direction of the billet.

7. The continuous casting and rolling production equipment according to claim 1, characterized in that, The temperature sensor is installed on one of the insulation covers located between the heating device and the rolling mill.

8. A continuous casting and rolling production method, comprising the continuous casting and rolling production equipment as described in any one of claims 1 to 7, characterized in that, Along the conveying direction of the billet, the temperature Ta of the top surface of the billet, and the temperatures Tb and Tc of the left and right sides of the billet are detected, where T1 = (Ta + Tb + Tc) / 3 and T2 = (Ta + Tb + Tc) / 3.

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