Main iron runner device of blast furnace casting house and implementation method

Abstract

The invention relates to a main iron runner device of a blast-furnace casting house and an implementation method, the main iron runner device of the blast-furnace casting house comprises a main iron runner and a groove, the groove is provided with a top opening and is communicated with two ends of the main iron runner, and the top opening is covered with a cover plate; the ventilation pipelines are arranged in the bottom wall of the main iron runner, and air outlets of the ventilation pipelines are used for being connected with a combustion-supporting air main pipe in front of a heat exchanger of the hot blast stove in an on-off mode; the blower device is connected with the air inlets of the ventilation pipelines in an on-off manner; the plurality of linear temperature sensors are arranged in the side wall of the main iron runner and are used for monitoring the temperature of the corresponding position in real time; and the controller is electrically connected with each linear temperature sensor and can judge the erosion state of the corresponding position of the main iron runner according to the temperature monitored by the linear temperature sensors in real time. The problem that in the prior art, casting house waste heat recovery and main iron runner erosion degree monitoring are lacked can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, and in particular to a main iron ditch device for a blast furnace tapping site and an implementation method thereof. Background Art

[0002] In the metallurgical industry, refractory materials are often used to isolate heat during the steel smelting process, especially in the main iron ditch area of ​​the blast furnace iron-making yard. Under the action of high-temperature molten iron and slag, although different types of refractory materials are arranged on the sides and bottom of the iron ditch and slag ditch, some heat will still pass through the refractory materials and be conducted to the structural surface. The lost heat cannot be well utilized, resulting in a waste of resources. At the same time, during the blast furnace iron-making process, the long-term almost continuous iron-making causes varying degrees of erosion of the castings in the ditch shell. However, due to the high temperature and complex environment, the erosion inside the refractory materials cannot be observed in time, causing certain safety hazards.

[0003] At present, the monitoring of the erosion of the main groove refractory materials mainly adopts the method of installing thermocouples on the side walls of the groove shell. When the temperature exceeds the set value, the main groove refractory materials need to be repaired and replaced. However, these monitoring methods have problems such as insufficient monitoring range and inability to replace thermocouples, and cannot fully meet production needs. At present, most iron plants require workers to constantly detect the degree of erosion and regularly replace the castings in the main iron groove, resulting in waste of resources and increased costs. At the same time, during the iron-making process of the blast furnace, the heat loss of the molten iron is serious, and this part of the heat is not effectively utilized. There is a main iron groove air cooling technology in the existing technology. Although it can reduce the temperature of the main iron groove to a certain extent and extend the service life of the refractory materials in the main iron groove, it cannot recycle the lost heat, nor can it realize the judgment of the degree of erosion of the refractory materials, and there are certain defects. Summary of the invention

[0004] The object of the present invention is to provide a main iron ditch device and implementation method for a blast furnace casthouse, which can overcome the problems of lack of waste heat recovery in the casthouse and lack of monitoring of the erosion degree of the main iron ditch in the prior art.

[0005] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] The present invention provides a main iron channel device for a blast furnace casting house, comprising:

[0007] The main iron channel has a groove with a top opening and connecting the two ends of the main iron channel, and a cover plate is provided at the top opening;

[0008] A plurality of ventilation ducts are arranged in the bottom wall of the main iron channel, and the air outlet of each ventilation duct is used to be connected to the combustion air main pipe in front of the heat exchanger of the hot blast furnace in an on-off manner;

[0009] A blast device, connected to the air inlet of each ventilation duct in an on-off manner;

[0010] Multiple linear temperature sensors are arranged in the side wall of the main iron channel to monitor the temperature at corresponding positions in real time;

[0011] The controller is electrically connected to each linear temperature sensor and can judge the corrosion state of the corresponding position of the main iron groove according to the temperature monitored in real time by the linear temperature sensor.

[0012] In a preferred embodiment of the present invention, the length directions of each linear temperature sensor are parallel to each other and perpendicular to the length direction of the main iron groove; and the linear temperature sensor can extend from one side to the other side in the width direction of the main iron groove.

[0013] In a preferred embodiment of the present invention, the length directions of the ventilation ducts are parallel to each other and parallel to the length direction of the main iron channel.

[0014] In a preferred embodiment of the present invention, the main iron groove includes a wall body and a groove shell, the wall body includes a bottom wall and two side walls arranged on both sides of the bottom wall, the groove shell is located in the wall body and includes a groove shell bottom and two groove shell side parts arranged on both sides of the groove shell bottom, a bottom refractory material layer is filled between the bottom wall and the groove shell bottom, a side refractory material layer is filled between the side wall and the corresponding groove shell side part, a top refractory material layer is provided on the inner wall of the groove shell, and a groove is formed in the top refractory material layer; each ventilation duct is arranged in the bottom refractory material layer, and each linear temperature sensor is arranged in the side refractory material layer and is attached to the outer wall of the corresponding groove shell side part.

[0015] In a preferred embodiment of the present invention, a plurality of ventilation holes are provided on the side wall.

[0016] In a preferred embodiment of the present invention, a plurality of support beams and a plurality of columns are provided at the bottom of the main iron channel, the length direction of each support beam is perpendicular to the length direction of the main iron channel, and each column is vertically arranged.

[0017] In a preferred embodiment of the present invention, air mixing devices are provided at both ends of the main iron groove, wherein one of the air mixing devices can connect the air inlets of multiple ventilation ducts with an air inlet duct, and the other air mixing device can connect the air outlets of multiple ventilation ducts with an air outlet duct; the air inlet duct and the air blowing device can be connected in an on-off manner, and the air outlet duct and the combustion air main pipe can be connected in an on-off manner.

[0018] In a preferred embodiment of the present invention, a first switch valve is provided on the air inlet duct, and a second switch valve is provided on the air outlet duct.

[0019] The present invention also provides a method for implementing a main iron ditch in a blast furnace tapping site, comprising:

[0020] A plurality of ventilation ducts are arranged in the bottom wall of the main iron groove, and a plurality of linear temperature sensors are arranged in the side wall of the main iron groove;

[0021] Blow air into each ventilation duct, and connect the air outlet of each ventilation duct with the combustion air main pipe in front of the heat exchanger of the hot air furnace;

[0022] The corrosion state of the corresponding position of the main iron groove is judged according to the temperature monitored in real time by the linear temperature sensor.

[0023] In a preferred embodiment of the present invention, after a plurality of linear temperature sensors are arranged in the side wall of the main iron groove, the temperature of the corresponding position detected by the linear temperature sensor is recorded and recorded as the initial temperature;

[0024] The erosion state of the corresponding position of the main iron groove is judged according to the temperature monitored in real time by the linear temperature sensor, including:

[0025] Record the temperature monitored in real time by the linear temperature sensor and record it as the real-time temperature;

[0026] Calculate the temperature difference between the real-time temperature and the corresponding initial temperature in real time;

[0027] When the temperature difference corresponding to the position corresponding to any linear temperature sensor is greater than the preset temperature, the main iron groove at that position is severely corroded.

[0028] As described above, the main iron groove device and implementation method of the blast furnace iron-making yard in the present invention have the functions of waste heat recovery and temperature measurement monitoring. By setting up ventilation ducts, on the one hand, the heat of the main iron groove is exchanged by air cooling, which greatly reduces the lining erosion, extends the service life of the main iron groove, and reduces the replacement frequency of refractory materials in the main iron groove; on the other hand, the waste heat of the main iron groove is recovered by cold air and used in the hot blast furnace, which can increase the air inlet temperature of the hot blast furnace, reduce the gas consumption of the hot blast furnace, and save energy and cost. At the same time, adding a linear temperature sensor to monitor the erosion in the main iron groove can be repaired in time to prevent the castables in the groove from being seriously eroded and causing safety accidents; and using a linear temperature sensor, each linear temperature sensor is a whole line arranged in the side wall of the main iron groove. Compared with the temperature measurement of the existing thermocouple, the temperature measurement range is larger, the measurement accuracy is higher, and the monitoring of the erosion degree of the main iron groove is more comprehensive and accurate, which is more helpful to ensure construction safety. The entire device not only saves energy and reduces costs, but also monitors the erosion in the main iron groove. It can be used in metallurgy, construction, chemical industry and other industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0030] in:

[0031] Figure 1 : A front view schematic diagram of the main iron ditch device of the blast furnace iron-making yard provided by the present invention.

[0032] Figure 2 : A side view schematic diagram of the main iron ditch device of the blast furnace iron-making yard provided by the present invention.

[0033] Figure 3 : A schematic bottom view of the main iron ditch device of the blast furnace iron-making yard provided by the present invention.

[0034] Description of Figure Numbers:

[0035] 1. Main iron ditch; 11. Groove; 12. Wall; 121. Ventilation hole; 13. Ditch shell; 14. Bottom refractory material layer; 15. Side refractory material layer; 151. Refractory clay brick; 152. Insulating brick; 153. Castable; 16. Top refractory material layer; 161. High alumina brick; 162. Refractory castable; 17. Cover plate;

[0036] 2. Ventilation ducts;

[0037] 3. Linear temperature sensor;

[0038] 4. Controller;

[0039] 5. Support beam;

[0040] 6. Air mixing device;

[0041] 7. Column;

[0042] 8. Blast furnace taphole. DETAILED DESCRIPTION

[0043] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0044] like Figures 1 to 3 As shown, the present application provides a main iron ditch device for a blast furnace iron-making site, comprising:

[0045] The main iron channel 1 has a groove 11 with a top opening and connecting the two ends of the main iron channel 1, and a cover plate 17 is provided at the top opening;

[0046] A plurality of ventilation ducts 2 are arranged in the bottom wall of the main iron channel 1, and the air outlet of each ventilation duct 2 is used to be connected to the combustion air main pipe in front of the heat exchanger of the hot blast furnace in an on-off manner;

[0047] A blast device, connected to the air inlet of each ventilation duct 2 in an on-off manner;

[0048] A plurality of linear temperature sensors 3 are arranged in the side wall of the main iron channel 1 to monitor the temperature at corresponding positions in real time;

[0049] The controller 4 is electrically connected to each linear temperature sensor 3 and can judge the corrosion state of the corresponding position of the main iron groove 1 according to the temperature monitored in real time by the linear temperature sensor 3 .

[0050] Among them, the groove 11 is mainly used for molten iron to flow through; the cover plate 17 generally adopts a cast steel cover plate, which can close the groove 11 to seal the smoke during the iron tapping. The ventilation duct 2 can use a blasting device to blow gas, such as room temperature air or cold air. During the iron tapping process of the blast furnace, the heat of the molten iron is transferred to the ventilation duct 2. In this state, the air (cold air) in the ventilation duct 2 exchanges heat with the duct, and the hot air after heat exchange is mixed into the combustion air main pipe in front of the heat exchanger of the hot blast furnace. Using multiple linear temperature sensors 3, the temperature of the corresponding position can be monitored in real time, and the erosion state of the corresponding position of the main iron groove 1 can be monitored, so that the operator can take corresponding measures in time.

[0051] Therefore, the device in this embodiment has the functions of waste heat recovery and temperature measurement monitoring. By setting the ventilation duct 2, on the one hand, the heat of the main iron groove 1 is exchanged by air cooling, which greatly reduces the erosion of the lining, prolongs the service life of the main iron groove 1, and reduces the replacement frequency of the refractory in the main iron groove 1; on the other hand, the waste heat of the main iron groove 1 is recovered by cold air and used in the hot blast furnace, which can increase the air inlet temperature of the hot blast furnace, reduce the gas consumption of the hot blast furnace, and save energy and environment. At the same time, adding a linear temperature sensor 3 to monitor the erosion in the main iron groove 1 can be repaired in time to prevent the castable material in the groove from being seriously eroded and causing safety accidents; and the linear temperature sensor 3 is used, each linear temperature sensor 3 is a whole linear structure, and is arranged in the side wall of the main iron groove 1. Compared with the temperature measurement of the existing thermocouple, the temperature measurement range is larger, the measurement accuracy is higher, and the monitoring of the erosion degree of the main iron groove 1 is more comprehensive and accurate, which is more helpful to ensure construction safety. The whole device can save energy and reduce costs while monitoring the erosion condition in the main iron groove 1, and can be applied in industries such as metallurgy, construction, and chemical industry.

[0052] In a preferred embodiment, the length directions of the linear temperature sensors 3 are parallel to each other and perpendicular to the length direction of the main iron channel 1; and the linear temperature sensors 3 can extend from one side to the other side in the width direction of the main iron channel 1. The length directions of the ventilation ducts 2 are parallel to each other and parallel to the length direction of the main iron channel 1.

[0053] Each linear temperature sensor 3 is laid along the position of the groove shell 13 and fits closely with the groove shell 13 to monitor the temperature at all positions in the groove. At the same time, the fluctuation of temperature difference is used to monitor the erosion inside the main iron groove 1. Since the molten iron flows from top to bottom along the length direction of the groove 11, multiple linear temperature sensors 3 are arranged in a direction perpendicular to the length of the main iron groove 1 to increase the laying density of the linear temperature sensors 3, so that the erosion inside the main iron groove 1 can be detected more accurately. During operation, the molten iron will not fill the groove 11, but mainly flows in the part near the bottom of the groove 11. A lot of heat is lost during the iron-making process of the blast furnace. Each ventilation duct 2 is provided with a bottom, which makes it easier to recover the heat during the iron-making process.

[0054] In practical applications, refer to Figure 1 The main iron groove 1 includes a wall 12 and a groove shell 13. The wall 12 includes a bottom wall and two side walls arranged on both sides of the bottom wall. The groove shell 13 is located in the wall 12 and includes a groove shell bottom and two groove shell side parts arranged on both sides of the groove shell bottom. A bottom refractory material layer 14 is filled between the bottom wall and the groove shell bottom, and a side refractory material layer 15 is filled between the side wall and the corresponding groove shell side part. A top refractory material layer 16 is provided on the inner wall of the groove shell 13, and a groove 11 is formed in the top refractory material layer 16; each ventilation duct 2 is arranged in the bottom refractory material layer 14, and each linear temperature sensor 3 is arranged in the side refractory material layer 15 and is attached to the outer wall of the corresponding groove shell side part.

[0055] Reference Figure 1 The cross-sections of the wall 12 and the trench shell 13 are both U-shaped. The wall 12 is generally a brick structure, and the trench shell 13 is a metal shell. The trench shell bottom and the trench shell sides on both sides of the trench shell 13 are an integrally formed structure. The bottom refractory material layer 14, the side refractory material layer 15 and the top refractory material layer 16 are all made of refractory materials, which mainly play the role of isolating heat to prevent the trench shell 13 from burning through and being damaged. Generally, the bottom refractory material layer 14 is made of sand, the side refractory material layer 15 includes refractory clay bricks 151, insulating bricks 152 and castables 153 arranged in sequence from the outside to the inside, and the top refractory material layer 16 includes high-alumina bricks 161 and refractory castables 162 arranged in sequence from the outside to the inside.

[0056] The ventilation duct 2 and the linear temperature sensor 3 can be pre-buried and installed in the corresponding refractory layer. The material of the ventilation duct 2 should be a metal material with excellent heat resistance, high thermal conductivity and low density, including but not limited to alloy, iron, steel and other metal materials to ensure the heat exchange effect. The side refractory layer 15 and the bottom refractory layer 14 are generally not replaced. When the main iron groove 1 is severely eroded, the top refractory layer 16 is mainly replaced.

[0057] During use, when any of the linear temperature sensors 3 detects that the erosion degree at that position is serious, the operator will take out the trench shell 13 and the top refractory material layer 16 and replace the top refractory material layer 16 as a whole.

[0058] Generally, the inner diameter of the ventilation duct 2 is 50-200mm, and the spacing between adjacent ventilation ducts 2 is 1-3 times the inner diameter of the ventilation duct 2, which can ensure the strength of the main iron ditch 1 while ensuring the number of ducts. The inner diameter and length of the specific ventilation duct 2 are determined by the specific structure and plan of the iron-making yard; under the condition of fixed blast pressure, the number of ventilation ducts 2 installed is determined by the wind speed and the heat exchange capacity of the duct, and the air volume of each duct under the main iron ditch 1 is uniform and the heat exchange capacity is the same. When the ventilation duct 2 is ventilated by the blast device, the initial wind temperature is generally room temperature, and the blast flow rate is determined by the molten iron temperature and the thermal conductivity of the duct material. Lightweight insulation materials are also added to the lower side of the ventilation duct 2 to reduce the heat dissipation of air during the flow of air in the ventilation duct 2 and improve the waste heat utilization efficiency of the main iron ditch 1.

[0059] Furthermore, a plurality of vents 121 are provided on the side wall. The vents 121 penetrate through the side wall for heat dissipation.

[0060] Reference Figure 2 A plurality of support beams 5 are arranged at intervals at the bottom of the main iron ditch 1, and the length direction of each support beam 5 is perpendicular to the length direction of the main iron ditch 1, so as to strengthen the main iron ditch 1 and increase stability. A plurality of columns 7 are also arranged at the bottom of the main iron ditch 1, and each column 7 is arranged vertically, so as to support the main iron ditch 1 on the ground by using the columns 7. Generally, the bottom surface of the groove 11 of the main iron ditch 1 is inclined, generally with an inclination angle of 1%, and the blast furnace tapping port 8 is located above the upper end of the main iron ditch 1.

[0061] For ease of processing and installation, refer to Figure 3 Air mixing devices 6 are provided at both ends of the main iron groove 1, one of which can connect the air inlets of multiple ventilation ducts 2 with an air inlet duct, and the other air mixing device 6 can connect the air outlets of multiple ventilation ducts 2 with an air outlet duct; the air inlet duct can be connected to the air blowing device in an on-off manner, and the air outlet duct can be connected to the combustion air main pipe in an on-off manner.

[0062] A first switch valve is provided on the air inlet duct, and a second switch valve is provided on the air outlet duct to control the corresponding on and off of each location.

[0063] The air mixing device 6 can be a hollow box, which is roughly a conical structure. The cross section of one side is rectangular, and the width along the direction perpendicular to the length of the main iron groove 1 is the same as the width of the main iron groove 1 in this direction, so as to communicate with the ports of each ventilation duct 2; the cross section of the other side is rectangular and has a smaller area, so as to dock with the air inlet duct or the air outlet duct. A pressure test is carried out before the formal blast to ensure that there are no leaks in the pipeline.

[0064] The hot air flowing out of the air outlet duct is connected to the combustion air main pipe in front of the heat exchanger of the hot blast furnace, and a valve (i.e., the second switch valve) is added at the front end of the connection between the two. When there is no ventilation, the valve is in a closed state to prevent the combustion air of the hot blast furnace from flowing back.

[0065] Furthermore, the present application also provides a method for implementing the main iron ditch of a blast furnace iron-making yard, comprising:

[0066] A plurality of ventilation ducts 2 are arranged in the bottom wall of the main iron groove 1, and a plurality of linear temperature sensors 3 are arranged in the side wall of the main iron groove 1;

[0067] Blow air into each ventilation duct 2, and connect the air outlet of each ventilation duct 2 with the combustion air main pipe in front of the heat exchanger of the hot blast furnace;

[0068] The erosion state of the corresponding position of the main iron groove 1 is judged according to the temperature monitored in real time by the linear temperature sensor 3 .

[0069] The method can cool down the main iron groove 1 by setting a ventilation duct 2 at the bottom of the main iron groove 1, and use the heat of the blast furnace iron-out process to heat the air in the ventilation duct 2. The heated hot air is introduced into the combustion air main pipe in front of the heat exchanger of the hot blast stove, and the hot air is used in the hot blast stove. The waste heat emitted can be recycled and utilized, and the temperature of the cold air can be increased to reduce the gas consumption in the hot blast stove, save energy and reduce costs. Compared with the traditional main iron groove structure, the air heat exchange performed by the method is environmentally friendly, does not produce waste gas and waste residue pollutants, and improves the utilization rate of energy. At the same time, the method can measure the temperature in the groove, timely detect the temperature in the groove each time the iron is tapped, thereby checking the erosion conditions at various places in the main iron groove 1, and preventing the main iron groove lining (i.e. the top refractory material layer 16) from burning through; through the intelligent monitoring of the main iron groove 1, the erosion degree of the groove shell 13 can be timely discovered to facilitate later replacement. The method can be used for erosion monitoring of the main groove in the iron-out yard. Moreover, the linear temperature sensor 3 is used to detect the temperature, which has a larger temperature measurement range and higher measurement accuracy, and the monitoring of the erosion degree of the main iron groove 1 is more comprehensive and accurate.

[0070] Furthermore, after a plurality of linear temperature sensors 3 are arranged in the side wall of the main iron groove 1, the temperature of the corresponding position detected by the linear temperature sensor 3 is recorded and recorded as the initial temperature;

[0071] The erosion state of the corresponding position of the main iron groove 1 is judged according to the temperature monitored in real time by the linear temperature sensor 3, including:

[0072] Record the temperature monitored in real time by the linear temperature sensor 3 and record it as the real-time temperature;

[0073] Calculate the temperature difference between the real-time temperature and the corresponding initial temperature in real time;

[0074] When the temperature difference corresponding to the position corresponding to any linear temperature sensor 3 is greater than the preset temperature, the main iron groove at this position is severely corroded.

[0075] That is to say, after the sensor is installed and before the blast furnace is tapped, the temperature of the corresponding position detected by each linear temperature sensor 3 is first recorded and recorded as the initial temperature of each corresponding position. During the blast furnace tapping process, the temperature of each position will continue to rise. The real-time temperature of each position is detected in real time by each linear temperature sensor 3. The controller 4 can obtain the temperature difference between the real-time temperature and the corresponding initial temperature according to the real-time temperature detected by the linear temperature sensor 3. When the temperature difference is large, it means that the erosion at this position is serious.

[0076] Generally, the controller 4 is connected to each linear temperature sensor 3, and the controller 4 can also be connected to an alarm. When the air volume and air pressure are fixed, the temperature is basically stable within a reasonable range. As the number of times the iron is tapped increases, the temperature of the main iron groove 1 will gradually rise. By monitoring the changes in the temperature difference in the groove, the real-time temperature of each part of the outer surface of the groove shell 13 is monitored, and the erosion degree of the main iron groove 1 is monitored (that is, the burning condition of the above-mentioned top refractory layer 16 is monitored); when the temperature of a certain part is significantly higher than the temperature of the other parts, the refractory material in that part is obviously seriously damaged; the controller 4 can control the alarm to sound an alarm to prompt the staff to replace the above-mentioned top refractory layer as a whole.

[0077] Generally, under normal circumstances, the temperature difference is ≤100°C. Under a fixed air volume, the higher the air temperature difference of each iron tapping, the more serious the lining erosion of the main iron channel 1. When the temperature difference is greater than 100°C, it indicates that the erosion is serious. The above preset temperature can be set to 100°C.

[0078] The above method can be implemented by the above device, and has the same effect, which will not be described in detail here.

[0079] In a specific application example, a ventilation duct 2 is installed at the bottom of the main iron groove 1 in the blast furnace iron-making field. The inner diameter of the ventilation duct 2 is 100mm, and the spacing between the ventilation ducts 2 is 1 times the diameter of the duct. The molten iron temperature is 1450°C when the iron is tapped. The blast starts when the blast furnace opens the iron mouth. The blast air temperature is room temperature. The initial wind pressure is fixed, the wind pressure is 12kpa, the ventilation heat exchange time is one furnace iron-making time, and the real-time temperature of the iron-making process is tested. The preheated air is passed into the combustion air main pipe before the heat exchanger of the hot blast furnace to reduce the gas consumption of the hot blast furnace. The controller 4 is connected to the linear temperature sensor 3. As the number of iron-making times of the iron groove increases, the degree of erosion of the iron groove gradually increases. The erosion degree of the main iron groove 1 is monitored in time according to the temperature change during normal use. If the temperature of some positions in the iron-making process is obviously too high, it means that the refractory material of this part is seriously burned, and the top refractory layer 16 should be replaced as a whole to prevent the part from burning through the groove shell 13 and affecting the iron-making process.

[0080] The above are only exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A main iron channel device for a blast furnace casting house, characterized in that: include: A main iron channel, having a groove with a top opening and connecting two ends of the main iron channel, and a cover plate is provided at the top opening; A plurality of ventilation ducts are arranged in the bottom wall of the main iron channel, and the air outlet of each ventilation duct is used to be connected to the combustion air main pipe in front of the heat exchanger of the hot blast furnace in an on-off manner; A blasting device, connected to the air inlet of each ventilation duct in an on-off manner; Multiple linear temperature sensors are arranged in the side wall of the main iron channel to monitor the temperature at corresponding positions in real time; The controller is electrically connected to each of the linear temperature sensors and can judge the corrosion state of the corresponding position of the main iron groove according to the temperature monitored in real time by the linear temperature sensor.

2. The main iron channel device for a blast furnace casting house according to claim 1, characterized in that: The length directions of the linear temperature sensors are parallel to each other and perpendicular to the length direction of the main iron groove; and the linear temperature sensors can extend from one side to the other side in the width direction of the main iron groove.

3. The main iron channel device for a blast furnace casting house according to claim 1, characterized in that: The length directions of the ventilation ducts are parallel to each other and to the length direction of the main iron channel.

4. The main iron channel device for a blast furnace casting house according to claim 1, characterized in that: The main iron channel includes a wall body and a channel shell, the wall body includes a bottom wall and two side walls arranged on both sides of the bottom wall, the channel shell is located in the wall body and includes a channel shell bottom and two channel shell side parts arranged on both sides of the channel shell bottom, a bottom refractory material layer is filled between the bottom wall and the channel shell bottom, a side refractory material layer is filled between the side wall and the corresponding channel shell side part, a top refractory material layer is provided on the inner wall of the channel shell, and the groove is formed in the top refractory material layer; Each of the ventilation ducts is arranged in the bottom refractory material layer, and each of the linear temperature sensors is arranged in the side refractory material layer and abuts against the outer wall of the corresponding side of the trench shell.

5. The main iron channel device for a blast furnace casting house according to claim 4, characterized in that: A plurality of ventilation holes are provided on the side wall.

6. The main iron channel device for a blast furnace casting house according to claim 1, characterized in that: A plurality of support beams and a plurality of columns are arranged at the bottom of the main iron channel, the length direction of each support beam is perpendicular to the length direction of the main iron channel, and each column is arranged vertically.

7. The main iron channel device for a blast furnace casting house according to claim 1, characterized in that: Air mixing devices are provided at both ends of the main iron groove, one of the air mixing devices can connect the air inlets of multiple ventilation ducts with an air inlet duct, and the other air mixing device can connect the air outlets of multiple ventilation ducts with an air outlet duct; the air inlet duct can be connected to the air blowing device in an on-off manner, and the air outlet duct can be connected to the combustion air main pipe in an on-off manner.

8. The main iron channel device for a blast furnace casting house according to claim 7, characterized in that: A first switch valve is provided on the air inlet duct, and a second switch valve is provided on the air outlet duct.

9. A method for implementing the main iron channel of a blast furnace casting house, characterized in that: include: A plurality of ventilation ducts are arranged in the bottom wall of the main iron groove, and a plurality of linear temperature sensors are arranged in the side wall of the main iron groove; Blow air into each of the ventilation ducts, and connect the air outlet of each ventilation duct to the combustion air main pipe in front of the heat exchanger of the hot air stove; The corrosion state of the corresponding position of the main iron groove is judged according to the temperature monitored in real time by the linear temperature sensor.

10. The method for implementing the main iron channel of a blast furnace casting house according to claim 9, characterized in that: After a plurality of linear temperature sensors are arranged in the side wall of the main iron groove, the temperature of the corresponding position detected by the linear temperature sensor is recorded and recorded as the initial temperature; The erosion state of the corresponding position of the main iron groove is judged according to the temperature monitored in real time by the linear temperature sensor, including: Record the temperature monitored in real time by the linear temperature sensor and record it as the real-time temperature; Calculating in real time the temperature difference between the real-time temperature and the corresponding initial temperature; When the temperature difference corresponding to the position corresponding to any of the linear temperature sensors is greater than the preset temperature, the main iron groove at this position is severely corroded.

Images