Anti-sticking system and method for reducing converter sublance sticking slag

Abstract

The invention provides an anti-sticking system and method for reducing converter sublance sticking slag, the system comprises a coating storage tank used for storing high-temperature-resistant anti-sticking coating, a feeding air cylinder, a spraying head and a high-temperature-resistant brush, the input end of the feeding air cylinder is connected with the coating storage tank, the output end of the feeding air cylinder is connected with the spraying head through a feeding pipeline, and the high-temperature-resistant brush is connected with the spraying head. The feeding pipeline is provided with an electromagnetic valve used for controlling opening and closing of the feeding pipeline, the outlet end of the spraying head is located above the guiding taper pipe in the open state, and the high-temperature-resistant brushes are arranged on the inner wall of the guiding taper pipe and arranged in the circumferential direction of the inner wall of the guiding taper pipe. The device is easy and convenient to operate, convenient and fast to maintain, efficient and energy-saving, the problems of slag bonding and steel bonding of the gun body in the use process of the sublance are solved, the stability and success rate of probe connection are improved, the service life of the sublance body is prolonged, and therefore the production efficiency is overall improved.

Description

Technical Field

[0001] The present invention relates to the technical field of converter steelmaking, and particularly relates to an anti-sticking system and method for reducing slag sticking on a converter sublance. Background Art

[0002] Various probes with different functions can be inserted at the end of the converter sublance to measure information such as the temperature and composition in the furnace during smelting, and then transmit this information to the converter main control room, so as to carry out refined control of the smelting process.

[0003] During the use of the sublance, slag often adheres to it due to reasons such as improper operation by personnel, defects of the sublance itself, or improper maintenance of the sublance. For example, when welding the sublance and the probe, nodules form at the welding point, and the nodules are prone to adhering to high-temperature molten slag, which exacerbates erosion; the surface of the sublance body is rough, and the rough surface is more likely to adhere to high-temperature molten slag, which exacerbates erosion; after slag adheres to the weld between the sublance and the probe and is not cleaned and maintained in time, slag adhesion on the lance body is eroded by molten slag. In addition to causing molten slag to erode the sublance, slag adhesion on the sublance will also cause the connection between the probe and the sublance to fail, affecting the temperature measurement and oxygen determination of the converter and prolonging the production cycle. Therefore, preventing slag adhesion is very important for improving the stability of the sublance and the production efficiency.

[0004] The existing methods for preventing slag adhesion on the sublance usually involve adding slag cleaning devices or anti-sticking steel devices. For example, CN202222077774.7 discloses a taper sublance system with a spraying and jetting structure, including a taper sublance and a spraying and jetting structure. The taper sublance includes a straight pipe section, a taper pipe section, and a sublance head connected in sequence. The straight pipe section and the taper pipe section both include an inner pipe, a middle pipe, and an outer pipe arranged from the inside to the outside. The outer pipe of the straight pipe section uses a straight pipe outer pipe, and the outer pipe of the taper pipe section uses a tapered outer pipe. The spraying and jetting structure includes several spraying nozzles and several jetting nozzles arranged above the converter furnace mouth. The spraying nozzles are used to spray anti-sticking coatings on the taper pipe section, and the jetting nozzles are used to spray high-pressure cooling gas on the taper pipe section. This system uses a tapered outer pipe, which can increase the water cooling capacity by 10-20%, realize the automatic shedding of adhered steel slag, and at the same time cooperate with the spraying and jetting structure to reduce slag adhesion and effectively remove slag.

[0005] CN202323576243.3 discloses a converter sublance probe with a slag blocking structure, including: a connecting plate, a connecting frame is fixedly installed above the connecting plate, and a driving motor is inserted inside the connecting frame. A winch is fixedly installed at the front end of the driving motor, and a steel cable is wound around the outside of the winch. Since a buffer spring is inserted outside the telescopic rod, when the relative position between the buffer plate and the connecting plate shrinks, the buffer plate and the connecting plate will squeeze the buffer spring, and the buffer plates are connected by a buffer elbow. When the top of the sublance probe contacts the buffer plate, the sublance probe will drive the buffer plate below the buffer elbow to move upward. Part of the force transmitted from the sublance probe to the buffer plate is absorbed by the buffer elbow and the buffer spring, thereby avoiding the situation that the top of the sublance probe is damaged due to the impact of the sublance probe on the buffer plate driven by the steel cable.

[0006] CN202020386784.7 discloses a converter sublance lower nozzle anti-sticking steel device, which includes an annular pipe (1), a joint (2), a spray hole (3), a sublance lower nozzle connecting flange (4), a flow regulating valve (5), a water inlet pipe (6) and a sublance (7). The annular pipe (1) is fixed on the inner wall of the sublance (7) close to the sublance lower nozzle connecting flange (4). A plurality of uniformly arranged spray holes (3) are provided in the circumferential direction of the annular pipe (1), and the spraying direction of the spray holes (3) faces the inner wall of the sublance (7). A joint (2) is also provided on the annular pipe (1), and the water inlet pipe (6) is connected to the joint (2) of the annular pipe (1), and a flow regulating valve (5) is provided on the water inlet pipe (6). The beneficial effect of the present invention is that it can prevent splashing steel beads from adhering to the lower nozzle of the sublance, affect the normal use of the sublance, and reduce the replacement and usage amount of the sublance.

[0007] The existing anti-sticking slag technology structures are often relatively complex and energy-consuming. Some systems that remove slag and discharge slag by jet spraying even pollute the sublance platform. Therefore, a simple-structured, easy-to-use anti-sticking system and method that are not prone to polluting the sublance platform are needed. Summary of the Invention

[0008] Aiming at the problems existing in the prior art and the positions where the sublance is prone to slag adhesion in production practice, the purpose of the present invention is to improve the connection success rate, stability, service life of the sublance body and production efficiency by reducing slag adhesion and steel adhesion through transforming the guiding vertebral canal of the swing arm connected to the sublance probe, so that it automatically applies high-temperature anti-adhesion coating to the lowermost end of the lance body and the joint of the probe straight pipe. For this reason, the present invention provides an anti-adhesion system for reducing slag adhesion of the converter sublance, including a coating storage tank for storing high-temperature anti-adhesion coating, a feeding cylinder, a spraying head and a high-temperature brush. The input end of the feeding cylinder is connected to the coating storage tank, and the output end of the feeding cylinder is connected to the spraying head through a feeding pipeline. A solenoid valve for controlling the opening and closing of the feeding pipeline is provided on the feeding pipeline. The outlet end of the spraying head is located above the guiding cone tube in the open state. The high-temperature brush is arranged on the inner wall of the guiding cone tube and is circumferentially arranged along the inner wall of the guiding cone tube. Preferably, the spraying head includes a spraying pipe and a spray gun. One end of the spraying pipe is connected to the feeding pipeline, and the other end of the spraying pipe is connected to three spray guns. The included angle between the axial direction of the spraying pipe and the axial direction of the guiding cone tube is 45°; The spraying head is located on the side of the annular section of the guiding cone tube away from the conical section. There is a distance y between the center of the end of the spraying pipe away from the feeding pipeline and the end face of the annular section of the guiding cone tube away from the conical section; The three spray guns are circumferentially arranged along the spraying pipe. The center line of one spray gun intersects the side wall of the conical section of the guiding cone tube, and the center lines of the other two spray guns respectively intersect the side walls of the annular section of the guiding cone tube. The center lines of the other two spray guns are in opposite directions and are symmetric about the axis of the guiding cone tube.

[0009] Preferably, the distance y is 150 mm.

[0010] Preferably, the high-temperature brush is connected to the guiding cone tube through an elastic adsorption cotton.

[0011] Preferably, the length of the elastic adsorption cotton is 20 mm. When the sublance is located in the guiding cone tube, the distance between the outer wall of the sublance and the inner wall of the guiding cone tube is x. The total length of the elastic adsorption cotton and the high-temperature brush is not greater than x + 10 mm.

[0012] Preferably, the ends of the high-temperature brush and the elastic adsorption cotton away from the guiding cone tube are inclined upward, and the included angle between the length direction of the high-temperature brush and the elastic adsorption cotton and the radial direction of the guiding cone tube is 20°.

[0013] Preferably, it further includes a PLC control system, and the PLC control system is respectively connected to the feeding cylinder, the spraying head, and the solenoid valve.

[0014] A method for reducing slag adhesion of the converter sublance includes the following steps: S1. When the sublance system executes the probe connection cycle, during the process of transporting the probe to the probe gripper, the feeding cylinder pumps the high-temperature anti-sticking coating in the coating storage tank to the spray head, and the spray head sprays the high-temperature brush part on the inner wall of the guiding cone tube in the open state, applying a preset amount of high-temperature anti-sticking coating to the high-temperature brush. S2. After the probe is transported to the position where the probe gripper is located, the probe gripper immediately starts the closing action, tightly locking the probe to ensure its stability; subsequently, the flipping arm starts to rise until the guiding cone tube reaches the vertical state. At this time, the closing ring of the guiding cone tube starts to act and buckles the sublance holder. S3. After the guiding cone tube buckles the sublance holder, the sublance body starts the descending process, and the sublance body passes through the guiding cone tube during the descending process; when the sublance body passes through the guiding cone, the high-temperature brush arranged on the inner wall of the guiding cone tube will contact the sublance body, and as the sublance descends, the high-temperature brush evenly brushes the high-temperature anti-sticking coating onto the sublance body. S4. After the reliable connection between the sublance and the probe is completed, the guiding cone tube smoothly unfolds to the preset opening position; subsequently, the probe gripper automatically releases the locked state and fully opens; the flipping arm slowly descends to the horizontal standby position under the servo drive, completing one round of connection between the sublance and the probe and the anti-sticking treatment.

[0015] The beneficial effects of the present invention are as follows: In this application, through the feeding cylinder and the spray head, the automatic spraying of the high-temperature anti-sticking coating is realized. And during the connection process between the sublance and the probe, the high-temperature brush coated with the high-temperature anti-sticking coating can brush the high-temperature anti-sticking coating on the sublance body, eliminating the need for manual application of the high-temperature anti-sticking coating, significantly reducing the labor intensity, and greatly shortening the operation time.

[0016] This application can control the single spraying amount of the high-temperature anti-sticking coating through the solenoid valve. At the same time, in combination with the inclined setting method of the high-temperature brush, it can effectively ensure that the high-temperature anti-sticking coating is sprayed onto the high-temperature brush, reducing the waste of the coating and avoiding the pollution of the working platform by the traditional spraying method.

[0017] This application solves the problems of slag sticking and steel sticking on the sublance body during the use of the sublance, not only improving the stability and success rate of the probe connection, but also extending the service life of the sublance body, thus overall improving the production efficiency; this application is easy to operate, convenient to maintain, energy-efficient, and has application value in industrial production. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the setting relationship between the high-temperature brush and the guiding cone tube of the present invention; Figure 3For Figure 2 Enlarged view of the structure at position A in Figure 4 Schematic diagram of the intersection position of the spray gun and the guiding conical tube of the present invention Figure 1 ; Figure 5 Schematic diagram of the intersection position of the spray gun and the guiding conical tube of the present invention Figure 2 .

[0019] Reference numerals in the figure: 1, paint storage tank; 2, feeding cylinder; 3, feeding pipeline; 4, solenoid valve; 5, spraying head; 51, spraying pipe; 52, spray gun A; 53, spray gun B; 54, spray gun C; 6, guiding conical tube; 7, high-temperature brush; 8, elastic adsorption cotton. Detailed implementation manner

[0020] In order to make the present invention clearer and more understandable, the technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the given embodiments are only one of the implementation manners and do not represent all embodiments.

[0021] In this article, terms such as "inside, outside, above, below" are established based on the positional relationship shown in the accompanying drawings. According to the differences in the accompanying drawings, the corresponding positional relationships may also change accordingly. Therefore, it cannot be understood as an absolute limitation of the protection scope.

[0022] Combined with the attached Figure 1 -attached Figure 5 , including a paint storage tank 1 for storing high-temperature anti-sticking paint, a feeding cylinder 2, a spraying head 5, and a high-temperature brush 7. The input end of the feeding cylinder 2 is connected to the paint storage tank 1, and the output end of the feeding cylinder 2 is connected to the spraying head 5 through a feeding pipeline 3. A solenoid valve 4 for controlling the opening and closing of the feeding pipeline 3 is provided on the feeding pipeline 3. The outlet end of the spraying head 5 is located above the guiding conical tube 6 in the open state. The high-temperature brush 7 is arranged on the inner wall of the guiding conical tube 6 and is arranged circumferentially along the inner wall of the guiding conical tube 6. The guiding conical tube 6 in the open state includes two symmetrical semi-guiding conical tubes, that is, the guiding conical tube 6 is in the open state before connecting the sub-gun and the probe, forming two semi-guiding conical tubes that tend to be horizontally placed. A spraying head 5 is correspondingly provided above each semi-guiding conical tube, and the two spraying heads 5 are connected to the same feeding pipeline 3. Specifically, the spraying head 5 includes a spraying pipe 51 and a spray gun. One end of the spraying pipe 51 is connected to the feeding pipeline 3, and the other end of the spraying pipe 51 is connected to three spray guns, which are spray gun A 52, spray gun B 53, and spray gun C 54 respectively. The included angle between the axial direction of the spraying pipe 51 and the axial direction of the guiding conical tube 6 is 45°; The spray head 5 is located on the side of the annular section of the guiding conical tube 6 away from the conical section. There is a spacing y between the center of the end of the spray pipe 51 far from the feeding pipe 3 and the end face of the annular section of the guiding conical tube 6 away from the conical section. The spacing y is 150 mm. The provision of the spacing between the spray pipe 51 and the guiding conical tube 6 can avoid interference between the guiding conical tube 6 and the spray pipe 51 when the guiding conical tube 6 is erected, and also avoid interference between the auxiliary gun and the spray pipe 51 when the auxiliary gun enters the guiding conical tube 6. The three spray guns are arranged circumferentially along the spray pipe 51. The center line of the spray gun A52 intersects the side wall of the conical section of the guiding conical tube 6, and the center lines of the spray guns B53 and C54 intersect the side walls of the annular section of the guiding conical tube 6 respectively. The center line directions of the spray guns B53 and C54 are opposite and symmetric about the axis of the guiding conical tube 6. That is, the spray gun A52 sprays the high-temperature anti-sticking coating on the high-temperature brush 7 in the conical section of the guiding conical tube 6, and the spray guns B53 and C54 spray the high-temperature anti-sticking coating on the high-temperature brush 7 in the annular section of the guiding conical tube 6. Moreover, the spray guns B53 and C54 spray towards both sides of the inner wall of the annular section of the guiding conical tube 6 respectively to ensure the comprehensiveness of spraying. Specifically, the extension line of the center line of the spray pipe 51 and the axis of the guiding conical tube 6 are in the same vertical plane.

[0023] Combined with Figure 4 and Figure 5 , the intersection point of the center line of the spray gun A52 and the side wall of the annular section of the guiding conical tube 6 is A', and the intersection points of the center lines of the spray guns B53 and C54 and the side wall of the annular section of the guiding conical tube 6 are B' and C' respectively.

[0024] Specifically, the high-temperature brush 7 and the guiding conical tube 6 are connected by an elastic adsorption cotton 8. The elastic adsorption cotton 8 can improve the adhesion effect of the high-temperature anti-sticking coating, enable the high-temperature anti-sticking coating to better adhere to the high-temperature brush 7, and avoid the falling of the coating, causing pollution to the working platform and waste of the coating.

[0025] Specifically, the length of the elastic adsorption cotton 8 is 20 mm. When the auxiliary gun is located in the guiding conical tube 6, the spacing between the outer wall of the auxiliary gun and the inner wall of the guiding conical tube 6 is x, and the total length of the elastic adsorption cotton 8 and the high-temperature brush 7 is not greater than x + 10 mm.

[0026] Specifically, the ends of the high-temperature brush 7 and the elastic adsorption cotton 8 away from the guiding conical tube 6 are inclined upward, and the included angle between the length direction of the high-temperature brush 7 and the elastic adsorption cotton 8 and the radial direction of the guiding conical tube 6 is 20°. The inclined setting of the high-temperature brush 7 and the elastic adsorption cotton 8 can better enable the high-temperature anti-sticking coating to adhere and the brushing effect is better.

[0027] Specifically, it also includes a PLC control system, which is respectively connected to the feeding cylinder 2, the spraying head 5, and the solenoid valve 4. The PLC control system coordinates the actions and working parameters among various components. The PLC control system is preset with a working program. After the working program is started, each component works according to the program settings, realizing the automatic progress of the work process.

[0028] More specifically, an automatic mode and a manual operation mode can be adopted. In the automatic mode, the PLC control system is connected to the sublance system. When the sublance system is started, the PLC control system automatically executes the working program to carry out the spraying work. In the manual operation mode, the PLC control system is connected to an operation box or a resistive touch screen, and the working program is started by manually triggering the physical buttons on the operation box or the virtual buttons on the resistive touch screen. The dual-mode design can ensure the continuity of the system work and provide a flexible choice for the operation of the system.

[0029] A method for reducing slag adhesion on the sublance of a converter includes the following steps: S1. When the sublance system executes the probe connection cycle, during the process of transporting the probe to the probe gripper, the feeding cylinder 2 pumps the high-temperature anti-sticking coating in the coating storage tank 1 to the spraying head 5, and the spraying head 5 sprays the inner wall of the guiding cone tube 6 in the open state at the position of the high-temperature brush 7, applying a preset amount of high-temperature anti-sticking coating to the high-temperature brush 7. The spraying process runs synchronously with the sublance system, ensuring the production rhythm and improving the work efficiency. S2. After the probe is transported to the position where the probe gripper is located, the probe gripper immediately starts the closing action to tightly lock the probe to ensure its stability. Subsequently, the flipping arm starts to rise until it drives the guiding cone tube 6 to reach the vertical state. At this time, the closing ring of the guiding cone tube 6 starts to act to fasten the sublance gripper. S3. After the guiding cone tube 6 fastens the sublance gripper, the sublance body starts to descend. During the descent of the sublance body, it passes through the guiding cone tube 6. When the sublance body passes through the guiding cone, the high-temperature brush 7 arranged on the inner wall of the guiding cone tube 6 will contact the sublance body. As the sublance descends, the high-temperature brush 7 evenly brushes the high-temperature anti-sticking coating onto the sublance body. S4. After the reliable connection between the sublance and the probe is completed, a reset is carried out: First, the guiding cone tube 6 smoothly unfolds to the preset opening position. Subsequently, the probe gripper automatically releases the locked state and fully opens. Finally, the flipping arm slowly descends to the horizontal standby position under the servo drive, completing a round of connection between the sublance and the probe and the anti-sticking treatment. The entire reset process is coordinated by the PLC control system to ensure the coordinated and orderly actions of each actuator, making full preparations for the next connection cycle.

[0030] Although embodiments of the present invention have been shown and described, various changes, modifications, substitutions, and variations can be made to these embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-sticking system for reducing slag sticking to the converter auxiliary gun, characterized by: The invention comprises a paint storage tank (1) for storing high-temperature resistant anti-stick paint, a feeding cylinder (2), a spray head (5) and a high-temperature resistant brush (7), wherein the input end of the feeding cylinder (2) is connected to the paint storage tank (1), the output end of the feeding cylinder (2) is connected to the spray head (5) via a feeding pipe (3), the feeding pipe (3) is provided with a solenoid valve (4) for controlling the closing of the feeding pipe (3), the outlet end of the spray head (5) is located above the guide cone (6) in an open state, and the high-temperature resistant brush (7) is arranged on the inner wall of the guide cone (6) and arranged circumferentially along the inner wall of the guide cone (6).

2. The anti-sticking system for reducing slag sticking to the converter auxiliary lance according to claim 1, characterized in that: The spray head (5) comprises a spray pipe (51) and a spray gun, one end of the spray pipe (51) is connected to the feed pipe (3), and the other end of the spray pipe (51) is connected to the three spray guns, and the angle between the axis direction of the spray pipe (51) and the axis direction of the guide cone tube (6) is 45°; The spray head (5) is located on a side of the annular section of the guide cone tube (6) away from the conical section, and a distance y is provided between the center of an end of the spray tube (51) away from the feeding pipe (3) and an end surface of the annular section of the guide cone tube (6) away from the conical section; The three spray guns are arranged along the circumference of the spray pipe (51), the center line of one spray gun intersects with the side wall of the conical section of the guide cone tube (6), the center lines of the other two spray guns intersect with the side walls of the annular section of the guide cone tube (6), and the center lines of the other two spray guns are in opposite directions and symmetrical based on the axis of the guide cone tube (6).

3. The anti-sticking system for reducing slag sticking to the converter auxiliary lance according to claim 2, characterized in that: The spacing y is 150 mm.

4. The anti-sticking system for reducing slag sticking to the converter auxiliary lance according to claim 1, characterized in that: The high temperature resistant brush (7) is connected to the guide cone tube (6) via elastic adsorption cotton (8).

5. The anti-sticking system for reducing slag sticking to the converter auxiliary lance according to claim 4, characterized in that: The length of the elastic adsorption cotton (8) is 20 mm. When the auxiliary gun is located in the guide cone tube (6), the distance between the outer wall of the auxiliary gun and the inner wall of the guide cone tube (6) is x. The total length of the elastic adsorption cotton (8) and the high temperature resistant brush (7) is no more than x+10 mm.

6. The anti-sticking system for reducing slag sticking to the converter auxiliary lance according to claim 5, characterized in that: One end of the high temperature resistant brush (7) and the elastic adsorption cotton (8) away from the guide cone tube (6) is inclined upward, and the angle between the length direction of the high temperature resistant brush (7) and the elastic adsorption cotton (8) and the radial direction of the guide cone tube (6) is 20°.

7. The anti-sticking system for reducing slag sticking to the converter auxiliary lance according to claim 1, characterized in that: It also includes a PLC control system, which is respectively connected to the feeding cylinder (2), the spray head (5), and the solenoid valve (4).

8. A method for reducing slag sticking to a converter auxiliary gun, which is implemented based on an anti-sticking system for reducing slag sticking to a converter auxiliary gun according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. When the auxiliary gun system performs a probe connection cycle, during the process of transporting the probe to the probe holder, the feeding cylinder (2) pumps the high temperature resistant anti-sticking paint in the paint storage tank (1) to the spray head (5), and the spray head (5) sprays the high temperature resistant brush (7) on the inner wall of the guide cone (6) in the open state, applying a preset amount of high temperature resistant anti-sticking paint to the high temperature resistant brush (7); S2. When the probe is transported to the location of the probe holder, the probe holder immediately starts the closing action and locks the probe tightly to ensure its stability; Subsequently, the flip arm begins to rise until it drives the guide cone tube (6) to a vertical state, at which time the closing ring of the guide cone tube (6) begins to move and locks the auxiliary gun holder; S3, after the guide cone (6) holds the auxiliary gun holder, the auxiliary gun body starts the descending process, and the auxiliary gun body passes through the guide cone (6) during the descending process; when the auxiliary gun body passes through the guide cone, the high temperature resistant brush (7) provided on the inner wall of the guide cone (6) will contact the auxiliary gun body, and as the auxiliary gun descends, the high temperature resistant brush (7) evenly brushes the high temperature resistant anti-sticking coating onto the auxiliary gun body; S4. After the auxiliary gun and the probe are reliably connected, the guide cone (6) is unfolded to a preset open position; then, the probe holder is automatically unlocked and fully opened; The flip arm slowly descends to a horizontal standby position under the servo drive, completing a round of connection between the auxiliary gun and the probe and anti-sticking treatment.

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