Spraying system for converter mouth

Abstract

The utility model relates to the technical field of steelmaking equipment, and particularly discloses a converter mouth spraying system which comprises two push-pull type fireproof doors arranged on the front side of a converter, two spray guns arranged on the two push-pull type fireproof doors respectively and a coating tank communicated with the two spray guns. Nozzles of the two spray guns face a converter mouth. The two spray guns are driven by the corresponding push-pull type fireproof doors to have a first stroke away from each other and a second stroke close to each other. The two spray guns are used for spraying the upper half part of the converter mouth rotating upwards in the first stroke, and the two spray guns are used for spraying the lower half part of the converter mouth rotating upwards in the second stroke. According to the spraying system for the converter mouth, spraying of the converter mouth can be achieved without blowing-out operation, blowing-out time is saved, production efficiency is improved, and production plans are not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steelmaking equipment technical field, concretely relates to a converter mouth spraying system. BACKGROUND

[0002] The converter is a kind of metallurgical equipment for steelmaking, and its main function is to produce steel by oxidizing impurities in liquid metal.The converter is usually provided on a supporting mechanism and rotates through a rotating mechanism to complete feeding and discharging.The converter usually has a barrel structure, including a top inlet for feeding and a side outlet for discharging.The top inlet is commonly known as the converter mouth.During smelting, the converter is in a vertical state.When discharging or slagging is needed, the converter is in an inclined state.In order to prevent the harm to the operators caused by the smoke, splashed slag liquid and heat emitted by the converter during smelting, a push-pull fire door is provided on the side of the converter, i.e., the front side of the converter.

[0003] During the falling process of the high-temperature liquid splashed by the converter, the temperature decreases and the viscosity increases, thereby forming slag adhering to the outer end surface and inner wall of the converter mouth.As the slag continuously accumulates, it eventually causes serious slag adhesion to the converter mouth, resulting in a smaller size of the converter mouth and difficulty in feeding.Therefore, the converter needs to be stopped every shift to use a furnace dismounting machine and other equipment to clean the slag at the converter mouth, which seriously affects the production plan and production efficiency.

[0004] In the prior art, the refractory anti-sticking slag coating is usually sprayed to the position of the converter mouth by manual or mechanical methods to form a coating layer at the position of the converter mouth, which can prevent the adhesion and accumulation of slag.However, in order to facilitate spraying, the converter needs to be stopped when spraying the converter mouth, and after the converter is used for a period of time, the anti-sticking slag coating will be worn out, so the converter also needs to be stopped for re-spraying, which also affects the production plan and production efficiency. UTILITY MODEL CONTENTS

[0005] The utility model provides a converter mouth spraying system, which aims to solve the technical problem that the converter needs to be stopped when spraying the refractory anti-sticking slag coating in the prior art, affecting the production plan and production efficiency.

[0006] The converter mouth spraying system of the utility model includes two push-pull fire doors provided on the front side of the converter, two spray guns respectively provided on the two push-pull fire doors and a coating tank connected with the two spray guns.The nozzles of the two spray guns face the converter mouth.The two spray guns have a first stroke of moving away from each other and a second stroke of moving close to each other under the driving of the corresponding push-pull fire door.The two spray guns are used to spray the upper half of the upwardly rotating converter mouth in the first stroke, and the two spray guns are used to spray the lower half of the upwardly rotating converter mouth in the second stroke.

[0007] Preferably, the push-pull fireproof door is further provided with a fireproof protection shell arranged along the axial direction of the spray gun and a driving mechanism arranged in the fireproof protection shell; the driving mechanism is used for driving the spray gun to move relative to the fireproof protection shell so as to make the spray gun enter or exit the fireproof protection shell.

[0008] Preferably, the converter mouth spraying system further comprises a control host, a spraying valve arranged in a pipeline between the paint tank and the spray gun, and a three-way switch valve arranged in a pipeline between the spraying valve and the spray gun; a first inlet of the three-way switch valve is communicated with the spraying valve, a second inlet of the three-way switch valve is communicated with a gas source, and an outlet of the three-way switch valve is communicated with the spray gun; and the control host is used for controlling the on-off of the spraying valve and the switching of the three-way switch valve.

[0009] Preferably, the control host is electrically connected with a start button and a stop button.

[0010] Preferably, the paint tank is a stainless steel pressure tank; and each spray gun has at least one nozzle.

[0011] Beneficial effects are:

[0012] 1. The converter mouth spraying system of the utility model does not need to stop operation, can realize spraying of the outer end surface and the inner wall of the converter mouth in the process of rotating the converter, thereby saving the time of stopping operation, improving production efficiency, not affecting production plan, and realizing spraying of the converter mouth in the process of each time tapping slag and erecting the converter, which can prevent the spraying layer of the converter mouth from being abraded; further, horizontal movement of the two spray guns is matched with rotation of the converter, precise spraying of the converter mouth is realized, and use of the refractory anti-slagging coating is saved; the existing push-pull fireproof door is used to realize movement of the two spray guns, a special driving device does not need to be arranged, thereby simplifying the structure and reducing cost.

[0013] 2. Since the fireproof protection shell is arranged, the spray gun can be retracted into the fireproof protection shell when not in use, the spray gun is protected, and damage of the spray gun caused by high temperature of the converter is prevented.

[0014] 3. The three-way switch valve is arranged, can be switched to be communicated with the gas source after spraying of the spray gun is completed, and pipelines and the spray gun can be purged, thereby preventing the refractory anti-slagging coating from adhering to the inner wall of the spray gun and causing blockage of the spray gun. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and other objects, features and advantages of the exemplary embodiments of the present application will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which several embodiments of the present application are shown by way of example, and wherein like reference numerals refer to like elements throughout. In the drawings:

[0016] Figure 1 Figure 1 is a structural schematic diagram of a converter mouth spraying system according to an embodiment of the present application;

[0017] Figure 2 Figure 4 is a structural schematic diagram of the spraying gun when working according to an embodiment of the present application.

[0018] Legend:

[0019] 1, converter; 2, push-pull fire door; 21, slide rail; 3, spraying gun; 31, nozzle; 4, paint tank; 5, refractory protective shell; 6, driving mechanism; 71, control host; 72, spraying valve; 73, three-way switch valve; 8, gas source. DETAILED DESCRIPTION

[0020] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0021] As shown in Figure 1 and Figure 2 The converter mouth spraying system of the present application comprises two push-pull fire doors 2 arranged on the front side of the converter 1, two spraying guns 3 arranged on the two push-pull fire doors 2 respectively, and a paint tank 4 communicating with the two spraying guns 3. The nozzles 31 of the two spraying guns 3 are directed towards the converter mouth. The two spraying guns 3 have a first stroke of moving away from each other and a second stroke of moving close to each other under the driving of the corresponding push-pull fire doors 2. The two spraying guns 3 are used for spraying the upper half of the upwardly rotating converter mouth when in the first stroke, and the two spraying guns 3 are used for spraying the lower half of the upwardly rotating converter mouth when in the second stroke. The paint tank 4 stores refractory anti-adhesion paint.

[0022] Before starting smelting, the converter 1 is first inclined to perform slagging, and then the converter 1 is gradually rotated from the inclined state to the vertical state. During the rotation of the converter 1, the two push-pull fire doors 2 drive the spray guns 3 to move towards each other along the horizontal direction to close, and when the top of the outer end surface of the converter port is equal in height to the two spray guns 3 and corresponds to the positions of the nozzles 31 of the two spray guns 3, the spray guns 3 spray refractory anti-slagging coating towards the top of the converter port through the nozzles 31. As the converter 1 is gradually rotated upwards, the two spray guns 3 gradually move away from each other under the drive of the push-pull fire doors 2, so that the nozzles 31 on both sides correspond to the two side end surfaces of the upper half of the converter port, and when the converter 1 is rotated to the position where the center of the outer end surface of the converter port is equal in height to the two spray guns 3, the spraying of the upper half of the converter port is completed. As the converter 1 continues to rotate upwards, the two spray guns 3 gradually move closer under the drive of the push-pull fire doors 2, so that the nozzles 31 on both sides correspond to the two side end surfaces of the lower half of the converter port, and when the converter 1 is rotated to the position where the bottom of the outer end surface of the converter port is equal in height to the two spray guns 3, the spraying of the lower half of the converter port is completed, and thus the spraying of the entire outer end surface of the converter port and the corresponding inner wall is completed, and finally the two spray guns 3 stop spraying. The converter 1 continues to rotate until it is in the vertical state. The converter port spraying system of the utility model has the following advantages over the prior art: 1. No need to stop the furnace for operation, the spraying of the outer end surface and the inner wall of the converter port can be realized during the rotation of the converter 1, thereby saving the time for stopping the furnace, improving the production efficiency, and not affecting the production plan. 2. The spraying of the converter port is realized during the process of each slagging and the vertical standing of the converter 1, which can prevent the wear of the sprayed layer of the converter port. 3. The horizontal movement of the two spray guns 3 matches the rotation of the converter 1, realizes accurate spraying of the converter port, and saves the use of refractory anti-slagging coating; 4. The movement of the two spray guns 3 is realized by using the existing push-pull fire doors 2, without the need to set a dedicated driving device, thereby simplifying the structure and reducing the cost.

[0023] Since the outer end surface of the converter port is an annular surface, in order to enable the spraying range of the spray guns 3 to cover the width of the annular surface and the inner wall of the converter port, each spray gun 3 can be provided with at least one nozzle 31. The plurality of nozzles 31 enables a wider spraying range and better spraying effect, preventing the occurrence of missed spraying.

[0024] In some other embodiments, the push-pull fire doors 2 can not move, and the spray guns 3 are driven to move by a driving device, thereby realizing the spraying function.

[0025] As shown in Figure 1 The coating tanks 4 are stainless steel pressure tanks. There are two coating tanks 4, and each coating tank 4 is used to provide refractory anti-slagging coating for one spray gun 3, so that the pressure of the spray gun 3 is sufficient and the spraying effect is better. Of course, one pressure tank 4 with high pressure can also be provided to provide refractory anti-slagging coating for two spray guns 3.

[0026] The angle sensor can be arranged on the converter 1 to detect the rotation angle of the converter 1, and the height of the converter mouth can be obtained by detecting the rotation angle of the converter 1, and then the relative movement of the two spray guns 3 driven by the push-pull fire door 2 is controlled. The rear end of the spray gun 3 is connected with a hose, and the hose can be synchronously stretched and contracted during the movement of the spray gun 3. The push-pull fire door 2 is further provided with a slide rail 21 at the bottom for guiding.

[0027] In the utility model, the rotation angle of the converter 1 corresponds to the height of the converter mouth, the height of the converter mouth can be determined according to the rotation angle of the converter 1, and then the push-pull fire door 2 is controlled to be opened or closed correspondingly, and the two spray guns 3 are driven to move away from or close to each other, and the spray coating of the converter mouth is realized. The movement speed of the push-pull fire door 2 matches the rotation speed of the converter 1, so that the range of the nozzle 31 of the spray gun 3 is just corresponding to the outer end surface of the converter mouth. In this way, the control of the spray gun 3 is more accurate, the spray coating effect is better, and the phenomenon of missing spray or repeated spray is prevented.

[0028] The refractory anti-sticking slag coating used in the utility model is a commonly used refractory anti-sticking slag coating on the market, for example, ZS-522 high-temperature self-cleaning non-sticking coating produced by a company. The surface of the coating is not easy to be adhered or stuck by other sticky substances and is easy to be removed after being adhered or stuck. The coating layer formed by the coating has the characteristics of high temperature resistance, extremely low surface energy, small friction coefficient, easy sliding, strong repulsive force and other anti-sticking and self-cleaning properties, and is suitable for high-temperature metal solutions such as molten steel, molten iron, molten aluminum, molten copper and molten lead, and for preventing the molten steel, molten iron, molten aluminum, molten copper and molten lead from adhering to the surface of production equipment and instruments at high temperature. Therefore, the use requirement can be met. Of course, other types of refractory anti-sticking slag coatings can also be used according to the requirement.

[0029] As shown in Figure 1 and Figure 2 , the push-pull fire door 2 is further provided with a refractory protection shell 5 arranged along the axial direction of the spray gun 3 and a driving mechanism 6 arranged in the refractory protection shell 5. The driving mechanism 6 is used to drive the spray gun 3 to move relative to the refractory protection shell 5, so that the spray gun 3 can enter and exit the refractory protection shell 5. The driving mechanism 6 can be a pneumatic cylinder, a linear motor or other linear motion mechanism.

[0030] In the utility model, when spraying is needed, the driving mechanism 6 drives the spray gun 3 to extend out of the refractory protection shell 5, and then spraying can be carried out. When the spraying is completed, the driving mechanism 6 drives the spray gun 3 to retract into the refractory protection shell 5, so as to protect the spray gun 3 and prevent the high temperature of the converter 1 from damaging the spray gun 3. Of course, the spray gun 3 can also be made of high-temperature resistant material.

[0031] As shown in Figure 1 and Figure 2As shown, the converter nozzle spraying system further comprises a control host 71, a spraying valve 72 arranged in the pipeline between the paint tank 4 and the spray gun 3, and a three-way switch valve 73 arranged in the pipeline between the spraying valve 72 and the spray gun 3. The first inlet of the three-way switch valve 73 is communicated with the spraying valve 72, the second inlet of the three-way switch valve 73 is communicated with the gas source 8, and the outlet of the three-way switch valve 73 is communicated with the spray gun 3. The control host 71 is used to control the on-off of the spraying valve 72 and the switching of the three-way switch valve 73.

[0032] In the utility model, when spraying is needed, the control host 71 controls the spraying valve 72 to open, and controls the first inlet of the three-way switch valve 73 and the outlet of the three-way switch valve 73 to be communicated, and the second inlet is closed, so that the refractory anti-adhesion paint in the paint tank 4 enters the spray gun 3 through the pipeline, the spraying valve 72 and the three-way switch valve 73 in the pipeline, and the spraying of the spray gun 3 is realized. When the spraying is completed, the control host 71 controls the spraying valve 72 to close, and controls the second inlet of the three-way switch valve 73 and the outlet of the three-way switch valve 73 to be communicated, and the first inlet is closed, so that the gas in the gas source 8 enters the spray gun 3 through the pipeline and the three-way switch valve 73, and the pipeline and the spray gun 3 are purged, so that the refractory anti-adhesion paint is prevented from adhering to the inner wall of the spray gun 3, and the spray gun 3 is prevented from being blocked.

[0033] As shown in Figure 1 and Figure 2 The control host 71 is electrically connected with a start button and a stop button. In the utility model, during the upward rotation of the converter 1, the start button is turned on, the corresponding movement of the spray gun 3 and the opening and closing of the corresponding valve are realized, and the spraying work is completed. The stop button can realize the stopping of the system at any time to prevent accidents.

[0034] According to the above description of the present specification, those skilled in the art can also understand that the terms used, such as "up", "down", "horizontal", "top", "bottom", "inner", "outer" and the like, are indicative of the orientation or positional relationship based on the orientation or positional relationship shown in the drawings of the present specification, and are only for the purpose of facilitating the description of the scheme of the utility model and simplifying the description, and do not explicitly or implicitly indicate or suggest that the devices or elements involved must have the described specific orientation, be constructed and operated in a specific orientation, therefore the above orientation or positional relationship terms cannot be understood or interpreted as a limitation on the scheme of the utility model.

[0035] In addition, in the description of the present specification, the meaning of "a plurality of" is at least two, such as two, three or more, etc., unless otherwise specifically limited.

Claims

1. A converter lip spraying system, characterized in that, The converter mouth spraying system comprises two push-pull fireproof doors arranged on the front side of the converter, two spray guns arranged on the two push-pull fireproof doors respectively, and a paint tank communicated with the two spray guns; the spray nozzles of the two spray guns are directed towards the converter mouth; the two spray guns have a first stroke of moving away from each other and a second stroke of moving close to each other under the drive of the corresponding push-pull fireproof door; the two spray guns are used for spraying the upper half of the upwardly rotating converter mouth in the first stroke, and the two spray guns are used for spraying the lower half of the upwardly rotating converter mouth in the second stroke.

2. The converter mouth spraying system according to claim 1, characterized in that, a refractory protection shell arranged along the axial direction of the spray gun is further arranged on the push-pull fireproof door, and a drive mechanism is arranged in the refractory protection shell; the drive mechanism is used for driving the spray gun to move relative to the refractory protection shell, so that the spray gun enters or exits the refractory protection shell.

3. The vessel lip spray system of claim 1, wherein, The spraying system further comprises a control host, a spraying valve arranged in the pipeline between the paint tank and the spray gun, and a three-way switch valve arranged in the pipeline between the spraying valve and the spray gun; a first inlet of the three-way switch valve is communicated with the spraying valve, a second inlet of the three-way switch valve is communicated with a gas source, and an outlet of the three-way switch valve is communicated with the spray gun; the control host is used for controlling the on-off of the spraying valve and the switching of the three-way switch valve.

4. The converter mouth spraying system according to claim 3, characterized in that, the control host is electrically connected with a start button and a stop button.

5. The converter mouth spraying system according to claim 1, characterized in that, the paint tank is a stainless steel pressure tank; each spray gun has at least one spray nozzle.

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