Converter oxygen lance automatic spraying system and using method

Abstract

The invention discloses an automatic spraying system for a converter oxygen lance and a using method, and belongs to the technical field of auxiliary equipment in the metallurgical industry, the automatic spraying system comprises a control system, an annular spraying pipeline, an air source connected with the annular spraying pipeline and a coating supply system, the spray gun is installed on the furnace top stand column in a rotatable mode, and the control system controls rotation and starting of the spray gun and starting of the air source and the coating supply system. According to the system, a layer of high-temperature-resistant coating is sprayed on the oxygen lance on the premise that the production rhythm of the converter is not affected, so that the oxygen lance is not prone to bonding, bonding substances are easy to clean, the cleaning frequency and the cleaning time each time are reduced, and the purpose of improving the production efficiency is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of auxiliary equipment in the metallurgical industry, and in particular relates to an automatic spraying system for a converter oxygen gun. Background Art

[0002] In the process of steel smelting, the serious adhesion of the converter oxygen lance is one of the important problems that plague converter production. The oxygen lance becomes larger due to severe adhesion. If it is not cleaned in time, it is easy to scrape the oxygen lance mouth or jam the lance. Once the oxygen lance is stuck, the oxygen lance can only be cut off and replaced, affecting production for more than 2 hours and causing great losses. Frequent cleaning of the oxygen lance will affect the production rhythm. How to reduce the adhesion of the oxygen lance has become an important issue in converter production. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic spraying system for a converter oxygen lance, which can spray a layer of high-temperature resistant coating on the oxygen lance without affecting the production rhythm of the converter, thereby making the oxygen lance less likely to stick and the sticking easier to clean, reducing the number of cleaning times and the time for each cleaning, thereby achieving the purpose of improving production efficiency.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: A converter oxygen gun automatic spraying system comprises a control system, an annular spraying pipe, an air source connected to the annular spraying pipe, and a paint supply system. The annular spraying pipe is connected to a spray gun, and the spray gun is rotatably mounted on a furnace top column. The control system controls the rotation and opening of the spray gun, the opening of the air source, and the paint supply system.

[0005] A further improvement of the technical solution of the present invention is that two spray guns are provided and symmetrically connected to both sides of the annular spraying pipeline.

[0006] A further improvement of the technical solution of the present invention is that the paint supply system includes a paint bucket, an air pump for conveying the paint, and a stirring system arranged in the paint bucket for stirring the paint.

[0007] A further improvement of the technical solution of the present invention is that solenoid valves are provided on the pipe connecting the air source and the annular spray pipe and the pipe connecting the paint supply system and the annular spray pipe, and the control system controls the opening of the solenoid valve and the air pump.

[0008] A further improvement of the technical solution of the present invention is that the spray gun is arranged on the furnace top column and is placed in a water-cooling protective sleeve.

[0009] A method for using a converter oxygen gun automatic spraying system comprises the following steps: Step A: When the converter smelting is finished, the oxygen lance is lowered from the upper limit to the point to be blown. During this process, the automatic spraying system of the converter oxygen lance is started, and the spraying lance installed on the column rotates to the spraying position and starts spraying; Step B, when the spraying is finished, the control system controls the solenoid valve to connect the air source, the solenoid valves on the paint supply system and the annular spray pipeline connecting pipe are closed, and the spray pipeline and the spray gun are purged to prevent the spray gun from being blocked after the paint dries; Step C: After the purge is completed, the spray gun rotates to the starting preparation position.

[0010] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is: The automatic spraying system for converter oxygen lances of the present application effectively reduces the adhesion of oxygen lances and improves production efficiency; the system of the present invention is easy to manufacture and has low cost. It makes the oxygen lance less likely to adhere or the adhered material is easy to clean, reducing the number of cleaning times and the time for each cleaning. Even if it adheres, it is very easy to clean it with a scraper, thereby achieving the purpose of improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of an automatic spraying system for a converter oxygen lance of the present application; Among them, 1. oxygen gun, 2. annular spray pipe, 3. paint bucket, 4. spray gun, 5. air pump, 6. furnace top column, 7. solenoid valve, 8. stirring system, 9. converter. DETAILED DESCRIPTION

[0012] The present invention is further described in detail below in conjunction with embodiments: like Figure 1 As shown, a converter oxygen gun automatic spraying system includes a control system, an annular spraying pipe 2, an air source connected to the annular spraying pipe 2, and a coating supply system. The annular spraying pipe 2 is connected to a spray gun 4, and the spray gun 4 is rotatably mounted on a furnace top column 9. The furnace top column 9 is a column arranged above the water-cooled smoke hood of the converter or a steel structure column of the factory building. The spray gun 4 can be installed using the furnace top column of the factory building according to the actual situation of the factory building. If the original steel structure columns of the factory building are far away, a furnace top column can be set.

[0013] The control system controls the rotation and opening of the spray gun 4, the opening of the air source and the paint supply system. The spray gun 4 can rotate within a range of 90°, that is, from horizontal to vertical. When the spray gun 4 rotates to the horizontal state, it is in the spraying position, at which time it is perpendicular to the oxygen gun 1 of the converter, and the oxygen gun 1 can be sprayed. After the spraying is completed, it rotates to the vertical position without affecting other operations.

[0014] The spray gun 4 is controlled to rotate by a cylinder or a motor. The device of the present application is installed above the water-cooled smoke hood of the converter, near the oxygen gun treatment operation point. Because it is a certain distance away from the converter and the overall ambient temperature is not high, the cylinder or motor can also be covered with a water-cooled protective cover for heat insulation protection.

[0015] Two spray guns 4 are provided, symmetrically connected to both sides of the annular spray pipe 2. In this way, the two spray guns 4 spray symmetrically on both sides of the oxygen gun 1, and the coating can be evenly sprayed on the oxygen gun 1. The coating is an anti-sticking slag coating for the oxygen gun, which can form a protective film on the oxygen gun 1, which is not easy to stick slag, and even if it sticks slag, it is easy to fall off.

[0016] The paint supply system includes a paint bucket 3, an air pump 5 for conveying the paint, and a stirring system 8 arranged in the paint bucket 3 for stirring the paint. The paint bucket contains a special paint that can effectively prevent the oxygen gun from sticking, and is equipped with a stirring system, which includes a pump and a stirring paddle, which are stirred evenly before use, and the air pump 5 conveys the paint to the annular spray pipe 2.

[0017] The pipeline connecting the air source and the annular spray pipeline 2 and the pipeline connecting the paint supply system and the annular spray pipeline 2 are both provided with a solenoid valve 7, and the control system controls the opening of the solenoid valve 7 and the air pump 5. The air source is used to purge the annular spray pipeline 2.

[0018] The control system includes a computer host, in which the spraying program is set. The operation buttons can be set on the converter operating table. The control system controls the opening and closing of the solenoid valve 7, the air pump 5 and the stirring system.

[0019] The spray gun 4 is arranged on the furnace top column 6, and the spray gun is placed in a water-cooling protective sleeve to avoid damage due to high temperature.

[0020] A method for using a converter oxygen gun automatic spraying system comprises the following steps: Step A: When the converter 9 is finished smelting, the oxygen gun 1 is lowered from the upper limit to the point to be blown. During this process, the automatic spraying system of the converter oxygen gun is started, and the spray gun 4 installed on the column rotates to the spraying position and starts spraying; Step B, when the spraying is finished, the control system controls the solenoid valve 7 to connect the air source, the solenoid valve on the coating supply system and the connecting pipe of the annular spraying pipeline 2 is closed, and the spraying pipeline and the spray gun are purged to prevent the coating from drying and clogging the spray gun 4; Step C: After the purging is completed, the spray gun 4 rotates to the starting preparation position.

Claims

1. A converter oxygen lance automatic spraying system, characterized by: The invention comprises a control system, an annular spraying pipe (2), an air source connected to the annular spraying pipe (2), and a paint supply system, wherein the annular spraying pipe (2) is connected to a spray gun (4), and the spray gun (4) is rotatably mounted on a furnace top column (9), and the control system controls the rotation and opening of the spray gun (4), the opening of the air source, and the paint supply system.

2. The converter oxygen lance automatic spraying system according to claim 1, characterized in that: Two spray guns (4) are provided and are symmetrically connected to both sides of the annular spraying pipeline (2).

3. The converter oxygen lance automatic spraying system according to claim 1, characterized in that: The paint supply system comprises a paint bucket (3), an air pump (5) for conveying the paint, and a stirring system (8) arranged on the paint bucket (3) for stirring the paint.

4. The converter oxygen lance automatic spraying system according to claim 3, characterized in that: The pipe connecting the air source and the annular spray pipe (2) and the pipe connecting the paint supply system and the annular spray pipe (2) are both provided with a solenoid valve (7), and the control system controls the opening of the solenoid valve (7) and the air pump (5).

5. The converter oxygen lance automatic spraying system according to claim 1, characterized in that: The spray gun (4) is arranged on a furnace top column (6), and the spray gun is placed in a water-cooling protective sleeve.

6. The converter oxygen lance automatic spraying system according to claim 1, characterized in that: The furnace top column (9) is a column arranged above the converter water-cooling smoke hood or a factory building steel structure column.

7. A method for using a converter oxygen gun automatic spraying system, characterized in that: The converter oxygen lance automatic spraying system according to any one of claims 1 to 5 comprises the following steps: Step A, when the converter (9) is finished smelting, the oxygen gun (1) is lowered from the upper limit position to the point to be blown. During this process, the automatic spraying system of the converter oxygen gun is started, and the spray gun (4) installed on the column rotates to the spraying position and starts spraying; Step B, when spraying is finished, the control system controls the solenoid valve (7) to connect the air source, close the solenoid valve on the connecting pipe between the paint supply system and the annular spraying pipeline (2), and purge the spraying pipeline and the spray gun to prevent the paint from drying and clogging the spray gun (4); Step C: After the purging is completed, the spray gun (4) rotates to the starting preparation position.

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