Powder spraying and slag adjusting device in converter tapping process

Abstract

The utility model relates to the field of converter tapping, in particular to a powder spraying and slag adjusting device in the converter tapping process. Comprising a slag stopping vehicle and a slag stopping vehicle big arm, a blowing pipe is fixed to the slag stopping vehicle big arm in the length direction, the front section pipe body of the blowing pipe extends to the outer side of the end of the slag stopping vehicle big arm and is bent downwards, the rear section pipe body of the blowing pipe is close to the slag stopping vehicle, and the end of the rear section pipe body is connected with a blowing tank hose. During tapping, the converter is firstly rotated, when the converter rotates until a tapping hole is opposite to the ground, the slag stopping trolley moves to drive a large arm of the slag stopping trolley to extend into the converter through a furnace opening, and powder is sprayed into liquid slag located on the lower portion of an inner cavity of the converter through the spraying and blowing pipe; the method does not need to add magnesium oxide slag with large granularity in the slag splashing furnace protection process depending on an overhead bunker like a traditional method, the slag adjusting time is remarkably shortened, the production efficiency is improved, an existing slag stopping vehicle and a large arm of the slag stopping vehicle are used as carriers for powder spraying and slag adjusting, new equipment does not need to be additionally installed, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of converter tapping, specifically a powder injection and slag adjustment device for the converter tapping process. Background Technology

[0002] In the converter production process of the metallurgical industry, to ensure the effectiveness of slag splashing for furnace protection, it is necessary to precisely adjust the composition and viscosity of the final converter slag. In traditional methods, magnesia-containing slag is mostly added into the furnace through a high-level silo during the slag splashing process. However, this method has some problems: the magnesia slag added from the high-level silo has a relatively large particle size (generally 20-30mm), and it needs to react with the final converter slag during the splashing process to change the slag viscosity. This process is time-consuming, which not only prolongs the splashing time but also affects production efficiency. On the other hand, there is a movable slag-blocking car on one side of the converter. Its large arm can hold a slag-blocking cone weighing about 30-45kg in a high-temperature environment (such as 1600℃) and accurately place it at the taphole of the converter. Utility Model Content

[0003] The present invention aims to solve the above problems and thus provide a powder injection and slag adjustment device for the converter tapping process that ensures production efficiency.

[0004] The technical solution adopted by this utility model to solve the aforementioned problem is:

[0005] A slag-adjusting device for the tapping process of a converter includes a slag-blocking car and a slag-blocking car boom. A jet pipe is fixed along the length of the slag-blocking car boom. The front section of the jet pipe extends to the outer side of the end of the slag-blocking car boom and is bent downward. The rear section of the jet pipe is close to the slag-blocking car and its end is connected to a jet can hose.

[0006] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0007] During tapping, the converter is first rotated. When the tapping opening is opposite to the ground, the slag-blocking car moves, driving its boom to extend into the converter through the furnace opening. Powder is then injected into the liquid slag located in the lower part of the converter cavity through the injection pipe. Unlike traditional methods, this eliminates the need to rely on a high-level silo to add larger-particle magnesium oxide slag during the slag splashing and furnace protection process. This significantly shortens the slag conditioning time and improves production efficiency. By using the existing slag-blocking car and its boom as the carrier for powder injection and slag conditioning, no additional equipment needs to be installed, thus reducing costs.

[0008] As a preferred embodiment, a further technical solution of this utility model is:

[0009] Furthermore, the angle between the front side of the injection pipe and the horizontal plane is between 30-60°, ensuring that the injection pipe has a suitable spray angle when injecting powder, so that the powder can be more evenly covered on the slag, improving the slag conditioning effect. The appropriate angle also helps to reduce powder waste and dust, and improve the working environment.

[0010] Furthermore, the top of the boom of the slag-blocking vehicle is equipped with support brackets at intervals. The injection pipe is fixed to the boom of the slag-blocking vehicle through the support brackets. The design of the support brackets enhances the stability of the injection pipe on the boom of the slag-blocking vehicle, preventing the injection pipe from shifting or falling off due to vibration or external force during the powder injection process, thereby ensuring the continuity and accuracy of powder injection and slag adjustment.

[0011] Furthermore, the rear section of the blowpipe hangs down to below the boom of the slag-blocking vehicle. This design brings the rear section of the blowpipe closer to the blowpipe tank, reducing the length and curvature of the hose, lowering the resistance of the powder during transportation, improving the powder spraying efficiency, and facilitating the maintenance and repair of the blowpipe.

[0012] Furthermore, a quick-connect coupling is installed between the rear end of the blowpipe and the blowpipe hose. This quick-connect coupling makes the connection between the blowpipe and the blowpipe hose more convenient and secure, reducing time and labor costs during the connection process. At the same time, the quick-connect coupling also facilitates quick replacement or repair of the blowpipe when needed, improving the flexibility and reliability of the equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0014] The following are marked in the diagram: 1. Ash-blocking car, 2. Ash-blocking car boom, 3. Injection pipe, 4. Injection tank hose, 5. Support bracket, 6. Quick connector, 7. Converter. Detailed Implementation

[0015] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0016] A slag-adjusting device for the tapping process of a converter includes a slag-blocking car 1 and a slag-blocking car boom 2. The slag-blocking car boom 2 is a dedicated slag-blocking device that is driven forward and backward by the slag-blocking car 1. The end of the slag-blocking car boom 2 can hold a slag-blocking cone. In the later stage of tapping, the slag-blocking cone is put into the tapping port of the converter 7. A blowpipe 3 is fixed along the length of the slag-blocking car boom 2. The front section of the blowpipe 3 extends to the outside of the end of the slag-blocking car boom 2 and is bent downward. The rear section of the blowpipe 3 is close to the slag-blocking car 1 and the end is connected to a blowpipe hose 4. A valve is installed on the rear section of the blowpipe 3.

[0017] Furthermore, the angle between the front side of the injection pipe 3 and the horizontal plane is between 30-60°, ensuring that the injection pipe 3 has a suitable spray angle when injecting powder, so that the powder can be more evenly covered on the slag, improving the slag conditioning effect. The appropriate angle also helps to reduce powder waste and flying, and improve the working environment.

[0018] Furthermore, the top of the slag-blocking vehicle boom 2 is provided with support brackets 5 at intervals. The injection pipe 3 is fixed to the slag-blocking vehicle boom 2 through the support brackets 5. The design of the support brackets 5 enhances the stability of the injection pipe 3 on the slag-blocking vehicle boom 2, preventing the injection pipe 3 from shifting or falling off due to vibration or external force during the powder injection process, thereby ensuring the continuity and accuracy of powder injection and slag adjustment.

[0019] Furthermore, the rear section of the blowpipe 3 hangs down to below the boom 2 of the slag-blocking vehicle. This design brings the rear section of the blowpipe 3 closer to the blowpipe tank, reduces the length and bending of the hose, lowers the resistance of the powder during the conveying process, improves the powder spraying efficiency, and facilitates the maintenance and repair of the blowpipe 3.

[0020] Furthermore, a quick connector 6 is provided between the rear end of the blowpipe 3 and the blowpipe hose 4. The quick connector 6 makes the connection between the blowpipe 3 and the blowpipe hose 4 more convenient and secure, reducing the time and labor costs during the connection process. At the same time, the quick connector 6 also facilitates the quick replacement or maintenance of the blowpipe 3 when needed, improving the flexibility and reliability of the equipment.

[0021] When tapping steel, converter 7 is first rotated. When converter 7 is rotated to the point where the tapping port is opposite to the ground, the slag-blocking car 1 moves, driving the slag-blocking car boom 2 to move horizontally and extend into converter 7 through the furnace opening. Powder is injected into the liquid slag located in the lower part of the inner cavity of converter 7 through the injection pipe 3. Unlike the traditional method, it does not require the addition of large-particle magnesium oxide slag material from the high-level silo during the slag splashing and furnace protection process. This significantly shortens the slag conditioning time and improves production efficiency. By using the existing slag-blocking car 1 and slag-blocking car boom 2 as the carrier for powder injection and slag conditioning, no additional equipment needs to be installed, thus reducing costs. Meanwhile, the stability and precision of the slag-blocking car boom 2 in high-temperature environments also provide favorable conditions for slag powder injection and adjustment. By directly injecting slag powder and adjusting it during the steel tapping process, the composition and viscosity of the slag can be controlled more precisely, thereby improving the effect of slag splashing and furnace protection. This helps to improve technical indicators such as converter 7 lifespan, refractory consumption, and converter 7 operating rate. Through rapid slag adjustment, the composition and viscosity of the slag can be better controlled, reducing the contamination of molten steel by slag and thus improving the quality of molten steel.

[0022] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A powder injection slag adjusting device for a converter tapping process, comprising a slag stopping car and a large arm of the slag stopping car, characterized in that: The blowing pipe is fixed on the length direction of the large arm of the slag blocking vehicle, the front section of the pipe body of the blowing pipe extends to the outside of the end of the large arm of the slag blocking vehicle and is arranged to be bent downward, the rear section of the pipe body of the blowing pipe is close to the slag blocking vehicle and the end is connected with the blowing tank hose.

2. The device according to claim 1, characterized in that: The included angle between the front side of the pipe body of the blowing pipe and the horizontal plane is between 30-60°.

3. The device according to claim 1, characterized in that: The support bracket is arranged at the top of the large arm of the slag blocking vehicle in intervals, and the blowing pipe is fixed on the large arm of the slag blocking vehicle through the support bracket.

4. The device according to claim 1, characterized in that: The rear section of the pipe body of the blowing pipe falls downward to below the large arm of the slag blocking vehicle.

5. The device according to claim 4, characterized in that: The quick connector is arranged between the rear end of the blowing pipe and the blowing tank hose.

Images