Deoxidizing agent adding device with good sealing performance

Abstract

The utility model provides a deoxidizing agent adding device with good sealing performance. A deoxidizing agent weighing device is used for providing a deoxidizing agent with a primary dose for a deoxidizing agent adding pipeline; the discharging end of the deoxidizing agent weighing device is connected with the feeding end of the first pneumatic pipe clamp valve through the feeding pipeline, the discharging end of the first pneumatic pipe clamp valve is connected with the feeding end of the deoxidizing agent adding pipeline, and the discharging end of the deoxidizing agent adding pipeline is connected with the feeding end of the second pneumatic pipe clamp valve. The discharging end of the second pneumatic pipe clamp valve is connected with a discharging pipeline leading to an electroslag furnace crystallizer. A nitrogen inlet is formed in one side of the middle section of the deoxidizing agent adding pipeline, and the gas outlet end of the electric coaxial valve is connected with the nitrogen inlet; the first pneumatic pipe clamp valve and the second pneumatic pipe clamp valve are not opened at the same time, and the electric coaxial valve and the second pneumatic pipe clamp valve are opened at the same time. According to the utility model, inert gas filling protection conveying of the deoxidizer is realized, and the risk that the protective atmosphere is easy to damage in the deoxidizer adding process is reduced.

Description

Technical Field

[0001] The utility model relates to electroslag remelting furnace equipment, in particular to a deoxidizer adding device with good sealing performance. Background Art

[0002] Early electroslag furnaces were mostly open-type electroslag furnaces without atmosphere protection. In order to reduce the burning of easily oxidized elements in steel, deoxidizers were often manually sprinkled on the slag surface regularly or simple deoxidizer adding equipment was used to add deoxidizers to the slag surface for deoxidation, resulting in poor uniformity of electroslag steel composition and low purity. With the increasingly higher quality requirements for electroslag products, most electroslag furnaces with improved structures have atmosphere protection functions.

[0003] Good atmosphere protection during the electroslag furnace smelting process can effectively isolate oxygen in the atmosphere, greatly reducing the burnout of easily oxidized elements in the steel, and making the electroslag ingots uniform and stable in composition with high purity. However, it is found in production practice that full atmosphere protection cannot completely avoid the burnout of easily oxidized elements in steel, and a part of deoxidizer needs to be added for precise control, especially for some steels that require precise control of easily oxidized elements or require micro-alloying. Therefore, it is very necessary to effectively add deoxidizer without destroying the protective atmosphere.

[0004] Due to the good effect of atmosphere protection, most atmosphere protection electroslag furnaces are not equipped with deoxidizer adding devices. Although a small number of atmosphere protection electroslag furnaces are equipped with simple deoxidizer adding devices, this type of deoxidizer adding device has the risk of easily destroying the protective atmosphere during the deoxidizer adding process, and it is also easy for the deoxidizer to be blocked in the pipeline, resulting in uneven deoxidizer addition. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a deoxidizer adding device with good sealing performance in view of the deficiencies of the prior art, so as to realize the protection and transportation of the deoxidizer filled with inert gas and reduce the risk of the protective atmosphere being easily destroyed during the deoxidizer adding process.

[0006] In order to solve the above technical problems, the present invention includes:

[0007] A deoxidizer adding device with good sealing performance comprises a deoxidizer weighing device, a first pneumatic pipe clamp valve, a second pneumatic pipe clamp valve, a deoxidizer adding pipeline and an electric coaxial valve; the deoxidizer weighing device is used to provide a dose of deoxidizer to the deoxidizer adding pipeline; the discharge end of the deoxidizer weighing device is connected to the feed end of the first pneumatic pipe clamp valve through a feed pipeline, the discharge end of the first pneumatic pipe clamp valve is connected to the feed end of the deoxidizer adding pipeline, and the deoxidizer adding pipeline is connected to the feed end of the first pneumatic pipe clamp valve. The discharge end is connected to the feed end of the second pneumatic tube clamp valve, the discharge end of the second pneumatic tube clamp valve is connected to a discharge pipe, and the discharge end of the discharge pipe leads to the electroslag furnace crystallizer; a nitrogen inlet is opened on one side of the middle section of the deoxidizer addition pipeline, the outlet end of the electric coaxial valve is connected to the nitrogen inlet, and the inlet end of the electric coaxial valve is connected to a nitrogen source; the first pneumatic tube clamp valve and the second pneumatic tube clamp valve are not opened at the same time, and the electric coaxial valve and the second pneumatic tube clamp valve are opened at the same time.

[0008] Furthermore, the deoxidizer weighing device is fixedly arranged above the deoxidizer adding pipeline; the deoxidizer adding pipeline is arranged vertically, and its upper end and lower end are the feed end and the discharge end respectively; the feed pipeline, the first pneumatic tube clamp valve, the deoxidizer adding pipeline, the second pneumatic tube clamp valve and the discharge pipeline are all coaxially arranged.

[0009] Furthermore, the inner diameters of the feed pipeline, the first pneumatic pipe clamp valve, the deoxidizer addition pipeline, the second pneumatic pipe clamp valve and the discharge pipeline are all the same.

[0010] Furthermore, the inner diameter of the deoxidizer adding pipeline is 10-15 times the diameter of the deoxidizer particle size, and the length of the deoxidizer adding pipeline is 5-10 times the thickness of a single dose of deoxidizer therein.

[0011] Furthermore, the feed pipe, deoxidizer addition pipe and discharge pipe are all made of stainless steel.

[0012] Furthermore, the feed end and the discharge end of the deoxidizer addition pipeline are both fixedly provided with connection flanges to facilitate connection with the first pneumatic pipe clamp valve and the second pneumatic pipe clamp valve.

[0013] Furthermore, a pressure relief port is provided on the other side of the middle section of the deoxidizer adding pipeline, and a spring-loaded micro-opening safety valve is installed on the pressure relief port for relieving pressure when the pressure is high.

[0014] The beneficial effects of the utility model are:

[0015] The utility model discloses the utility model has the advantages of simple structure, convenient operation and maintenance, safe and reliable use, and can realize the protection conveying of deoxidizer filled with inert gas, reduces the risk that the protective atmosphere is easily destroyed during the deoxidizer adding process, ensures that the deoxidizer smoothly enters the slag liquid surface of the electroslag furnace crystallizer, and has the advantages of safe and reliable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure and installation of the utility model;

[0017] In the figure: 1. The first pneumatic pipe clamp valve, 2. The second pneumatic pipe clamp valve, 3. The spring-loaded micro-opening safety valve, 4. The deoxidizer adding pipeline, 5. The electric coaxial valve, 6. The deoxidizer weighing equipment. DETAILED DESCRIPTION

[0018] To facilitate understanding of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Those skilled in the art should understand that the embodiments are only intended to help understand the present invention and should not be considered as specific limitations of the present invention.

[0019] like Figure 1 As shown, the utility model provides a deoxidizer adding device with good sealing performance, including a deoxidizer weighing device 6, a first pneumatic pipe clamp valve 1, a second pneumatic pipe clamp valve 2, a deoxidizer adding pipeline 4 and an electric coaxial valve 5; the deoxidizer weighing device 6 is fixedly arranged above the deoxidizer adding pipeline 4, and is used to provide a dose of deoxidizer to the deoxidizer adding pipeline 4; the deoxidizer adding pipeline 4 is vertically arranged, and its upper end and lower end are respectively a feed end and a discharge end; the discharge end of the deoxidizer weighing device 6 is connected to the feed end of the first pneumatic pipe clamp valve 1 through a feed pipeline, and the first pneumatic pipe clamp valve 1 is connected to the feed end of the first pneumatic pipe clamp valve 1 through a feed pipeline. The discharge end of the valve 1 is connected to the feed end of the deoxidizer addition pipeline 4, the discharge end of the deoxidizer addition pipeline 4 is connected to the feed end of the second pneumatic tube clamp valve 2, the discharge end of the second pneumatic tube clamp valve 2 is connected with a discharge pipeline, and the discharge end of the discharge pipeline leads to the electroslag furnace crystallizer; a nitrogen inlet is opened on one side of the middle section of the deoxidizer addition pipeline 4, the outlet end of the electric coaxial valve 5 is connected to the nitrogen inlet, and the inlet end of the electric coaxial valve 5 is connected to the nitrogen source; the first pneumatic tube clamp valve 1 and the second pneumatic tube clamp valve 2 are not opened at the same time, and the electric coaxial valve 5 and the second pneumatic tube clamp valve 2 are opened at the same time.

[0020] The feed pipe, the first pneumatic pipe clamp valve 1, the deoxidizer adding pipe 4, the second pneumatic pipe clamp valve 2 and the discharge pipe are all coaxially arranged. And the inner diameters of the feed pipe, the first pneumatic pipe clamp valve 1, the deoxidizer adding pipe 4, the second pneumatic pipe clamp valve 2 and the discharge pipe are all the same. The feed pipe, the deoxidizer adding pipe 4 and the discharge pipe are all made of stainless steel. It can effectively prevent corrosion and ensure the smoothness of the inner wall of the pipe.

[0021] The inner diameter of the deoxidizer adding pipeline 4 is 10-15 times the diameter of the deoxidizer particle size, and the length of the deoxidizer adding pipeline 4 is 5-10 times the thickness of a dose of deoxidizer therein, so as to facilitate nitrogen filling and transportation and prevent blockage.

[0022] The feed end and the discharge end of the deoxidizer addition pipeline 4 are both fixedly provided with connecting flanges to facilitate connection with the first pneumatic pipe clamp valve 1 and the second pneumatic pipe clamp valve 2 .

[0023] A pressure relief port is provided on the other side of the middle section of the deoxidizer addition pipeline 4, and a spring-loaded micro-opening safety valve 3 is installed on the pressure relief port for pressure relief when the pressure is high.

[0024] The utility model is used for safely, reliably and effectively adding deoxidizer to the atmosphere protection electroslag furnace to prevent the protection atmosphere from being damaged. The first pneumatic pipe clamp valve 1, the second pneumatic pipe clamp valve 2 and the electric coaxial valve 5 can be automatically controlled and operated according to the set program on the microcomputer, with a high degree of automation and improved operation stability.

[0025] The working process of this utility model:

[0026] 1) The deoxidizer weighing device 6 weighs a dose of deoxidizer according to the set value, and delivers it to the feed end of the first pneumatic tube clamp valve 1 through the feed pipeline. At this time, the first pneumatic tube clamp valve 1 and the second pneumatic tube clamp valve 2 are both in a closed state;

[0027] 2) The first pneumatic tube clamp valve 1 is opened, and a dose of deoxidizer falls to the feed end of the second pneumatic tube clamp valve 2 through the deoxidizer addition pipeline 4, and then the first pneumatic tube clamp valve 1 is closed;

[0028] 3) The second pneumatic pipe clamp valve 2 is opened, and a dose of deoxidizer falls onto the slag liquid surface in the electroslag furnace crystallizer through the discharge pipe. At the same time, the electric coaxial valve 5 is opened, and nitrogen is filled for protection and transportation to ensure that the deoxidizer falls smoothly onto the slag liquid surface in the crystallizer;

[0029] 4) The second pneumatic pipe clamp valve 2 and the electric coaxial valve 5 are closed, waiting for the next deoxidizer addition.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deoxidizer adding device with good sealing performance, characterized in that: The invention comprises a deoxidizer weighing device (6), a first pneumatic tube clamp valve (1), a second pneumatic tube clamp valve (2), a deoxidizer adding pipeline (4) and an electric coaxial valve (5); the deoxidizer weighing device (6) is used to provide a dose of deoxidizer to the deoxidizer adding pipeline (4); the discharge end of the deoxidizer weighing device (6) is connected to the feed end of the first pneumatic tube clamp valve (1) through a feed pipeline, the discharge end of the first pneumatic tube clamp valve (1) is connected to the feed end of the deoxidizer adding pipeline (4), and the discharge end of the deoxidizer adding pipeline (4) is connected to the feed end of the first pneumatic tube clamp valve (1). The electric coaxial valve (5) is connected to the feed end of the second pneumatic tube clamp valve (2), the discharge end of the second pneumatic tube clamp valve (2) is connected to a discharge pipeline, and the discharge end of the discharge pipeline leads to the electroslag furnace crystallizer; a nitrogen inlet is opened on one side of the middle section of the deoxidizer addition pipeline (4), the outlet end of the electric coaxial valve (5) is connected to the nitrogen inlet, and the inlet end of the electric coaxial valve (5) is connected to a nitrogen source; the first pneumatic tube clamp valve (1) and the second pneumatic tube clamp valve (2) are not opened at the same time, and the electric coaxial valve (5) and the second pneumatic tube clamp valve (2) are opened at the same time.

2. A deoxidizer adding device with good sealing performance according to claim 1, characterized in that: The deoxidizer weighing device (6) is fixedly arranged above the deoxidizer adding pipeline (4); the deoxidizer adding pipeline (4) is arranged vertically, and its upper end and lower end are respectively a feed end and a discharge end; the feed pipeline, the first pneumatic pipe clamp valve (1), the deoxidizer adding pipeline (4), the second pneumatic pipe clamp valve (2) and the discharge pipeline are all coaxially arranged.

3. A deoxidizer adding device with good sealing performance according to claim 2, characterized in that: The inner diameters of the feed pipeline, the first pneumatic pipe clamp valve (1), the deoxidizer addition pipeline (4), the second pneumatic pipe clamp valve (2) and the discharge pipeline are all the same.

4. A deoxidizer adding device with good sealing performance according to claim 1, characterized in that: The inner diameter of the deoxidizer adding pipeline (4) is 10-15 times the diameter of the deoxidizer particles, and the length of the deoxidizer adding pipeline (4) is 5-10 times the thickness of a dose of deoxidizer therein.

5. A deoxidizer adding device with good sealing performance according to claim 1, characterized in that: The feed pipe, the deoxidizer addition pipe (4) and the discharge pipe are all made of stainless steel.

6. A deoxidizer adding device with good sealing performance according to claim 1, characterized in that: The feed end and the discharge end of the deoxidizer addition pipeline (4) are both fixedly provided with connection flanges to facilitate connection with the first pneumatic pipe clamp valve (1) and the second pneumatic pipe clamp valve (2).

7. A deoxidizer adding device with good sealing performance according to claim 1, characterized in that: A pressure relief port is provided on the other side of the middle section of the deoxidizer addition pipeline (4), and a spring-loaded micro-opening safety valve (3) is installed on the pressure relief port for relieving pressure when the pressure is high.

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