A sealed slag adding mechanism

Abstract

The present invention discloses a sealed slag adding mechanism, which relates to the technical field of electric slag remelting furnace, including a frame, a slag hopper is arranged on the frame, a weighing device is arranged at the lower end of the slag hopper, the weighing device is used to weigh the weight of the slag in the slag hopper, the lower end of the slag hopper is connected to the feeder, the discharge end of the feeder is connected to a clamping pressure relief device, the clamping pressure relief device is used to connect with the crystallizer, and the weighing device and the feeder are electrically connected to the controller. The present invention can automatically add slag according to the set process at any time, can accurately know the slag adding speed and weight, form dynamic internal feedback, and accurately put slag according to time, reducing the cost caused by manual judgment of the timing and weight of adding materials, liberating manual labor, and making the product quality more excellent; the sealed slag adding mechanism and the remelting furnace form a closed environment, ensuring the protective atmosphere environment inside the crystallizer, and avoiding the introduction of other gases to affect the metallurgical quality; the pressure between the sealed slag adding mechanism and the remelting furnace can be balanced.

Description

Technical Field

[0001] The invention relates to the technical field of electroslag remelting furnaces, and in particular to a sealed slag adding mechanism. Background Art

[0002] In the process of electroslag remelting, slag plays a vital role, with functions such as heat generation, heat transfer, refining and purification. These functions make the slag have a great influence on the quality, technical and economic indicators of electroslag products. The entire smelting process is under vacuum atmosphere protection, and the furnace is basically sealed. However, with the increase of smelting time, the slag is constantly changing, and new slag must be added, otherwise it will cause quality problems of smelted electroslag ingots. Opening the furnace in the middle of the smelting process will destroy the protective atmosphere in the furnace, which is not conducive to smelting. Therefore, it is necessary to add materials in a closed space, and the slag needs to be weighed manually and loaded into the slag feeder. According to the time and the required amount, the button is manually operated to add the slag to the remelting furnace.

[0003] Although the existing spiral feeding automatic feeding device has solved the problems of slag damage, inability to continuously add and high labor intensity caused by traditional manual feeding and belt transmission to a certain extent, it is still unable to accurately control the weight and speed of feeding in combination with the process, and the clamping and pressure relief treatment is not reflected at the feeding port of the crystallizer, and the dynamic optimization control of feeding has not been realized. Summary of the invention

[0004] The purpose of the present invention is to provide a sealed slag adding mechanism to solve the problems existing in the above-mentioned prior art, realize accurate slag feeding, ensure the protective atmosphere environment inside the crystallizer, and balance the pressure between the sealed slag adding mechanism and the remelting furnace.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a sealed slag adding mechanism, comprising a frame, a slag hopper is arranged on the frame, a weighing device is arranged at the lower end of the slag hopper, the weighing device is used to weigh the weight of the slag in the slag hopper, the lower end of the slag hopper is connected to a feeder, the discharge end of the feeder is connected to a clamping pressure relief device, the clamping pressure relief device is used to be connected to a crystallizer, and the weighing device and the feeder are both electrically connected to a controller.

[0007] Preferably, a sealing cover is provided at the upper end of the slag hopper, a lifting lug is provided on the sealing cover, a sealing ring is provided between the sealing cover and the slag hopper, and the slag hopper is funnel-shaped.

[0008] Preferably, the slag hopper and the sealing cover are both made of stainless steel, and both the slag hopper and the sealing cover are provided with an interlayer, and the interlayer is filled with thermal insulation cotton.

[0009] Preferably, a gas connector is provided on the slag hopper, and the gas connector is used to introduce argon gas.

[0010] Preferably, the feeder is a screw feeder, and the screw feeder is driven by a servo motor, and the servo motor is electrically connected to the controller.

[0011] Preferably, the clamping pressure relief device includes a quick connector and a one-way valve, the quick connector is used for connecting the crystallizer, and the one-way valve is arranged at the connection between the quick connector and the discharge end of the feeder, and the one-way valve realizes outward exhaust.

[0012] Preferably, the one-way valve is connected to a dust removal system.

[0013] Preferably, a plurality of universal wheels are provided at the lower end of the frame, and a radar is also provided on the frame.

[0014] Compared with the prior art, the present invention has achieved the following technical effects:

[0015] The weighing device of the present invention is electrically connected to the controller, and can automatically add slag at any time according to the set process. The slag adding speed and weight can be accurately known to form dynamic internal feedback, and the slag material can be accurately added according to the time, which reduces the cost caused by manual judgment of the timing and weight of adding materials, liberates manual labor, and improves product quality; the clamping pressure relief device is clamped with the crystallizer feeding port, and the sealed slag adding mechanism and the remelting furnace form a closed environment, ensuring the protective atmosphere environment inside the crystallizer and avoiding the introduction of other gases that affect the metallurgical quality; the clamping pressure relief device can balance the pressure between the sealed slag adding mechanism and the remelting furnace to prevent the equipment from inhaling air. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the sealed slag adding mechanism of the present invention;

[0018] Among them: 1-slag hopper, 2-sealing cover, 3-weighing device, 4-servo motor, 5-clamping pressure relief device, 6-feeder, 7-universal wheel, 8-frame. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The purpose of the present invention is to provide a sealed slag adding mechanism to solve the problems existing in the above-mentioned prior art, realize accurate slag feeding, ensure the protective atmosphere environment inside the crystallizer, and balance the pressure between the sealed slag adding mechanism and the remelting furnace.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 As shown: This embodiment provides a sealed slag adding mechanism, including a frame 8, on which a slag hopper 1 is arranged, and a weighing device 3 is arranged at the lower end of the slag hopper 1, and the weighing device 3 is used to weigh the weight of the slag in the slag hopper 1, and the weighing range of the weighing device 3 is 500 kg, and the accuracy is ± 1 kg. The lower end of the slag hopper 1 is connected to the feeder 6 and is softly connected, and the feeder 6 is provided with a discharge chute, and the feeder 6 and the discharge chute are well sealed to ensure a protective atmosphere, and a clamping pressure relief device 5 is connected to the discharge end of the discharge chute, and the clamping pressure relief device 5 is used to be connected to the crystallizer, and the weighing device 3 and the feeder 6 are electrically connected to the controller, and the weighing device 3 transmits the measured data to the controller, and the controller will issue instructions in combination with parameters such as process, steel type, smelting state, time, weight, etc., to control the servo motor 4 of the feeder 6, and then control the speed of the spiral feeding.

[0023] Specifically, in this embodiment, a sealing cover 2 is provided at the upper end of the slag hopper 1, a lifting ear is provided on the sealing cover 2, a silicone sealing ring is provided between the sealing cover 2 and the slag hopper 1, and the slag hopper 1 is funnel-shaped, with an upper opening of 600*600mm, a lower opening of 100mm*100mm, and a top inclination angle of 45°.

[0024] In this embodiment, the slag hopper 1 and the sealing cover 2 are both made of 3mm stainless steel, and both the slag hopper 1 and the sealing cover 2 are provided with an interlayer filled with heat-insulating cotton.

[0025] In this embodiment, a gas connector is provided on the slag hopper 1, and the gas connector is used to introduce argon gas to achieve argon protection.

[0026] In this embodiment, the feeder 6 is a screw feeder, the control accuracy of the screw feeder is 2000g / min-3000g / min, the screw feeder is driven by a servo motor 4, and the servo motor 4 is electrically connected to the controller.

[0027] In this embodiment, the clamping pressure relief device 5 includes a quick connector and a one-way valve. The quick connector is used for crystallizer connection. The quick connector includes a C-type female head and an F-type male head. The one-way valve is arranged at the connection between the quick connector and the discharge end of the feeder 6. The one-way valve realizes outward exhaust, compensates for the pressure, balances the air pressure in the furnace and the feeding mechanism, and facilitates feeding.

[0028] In this embodiment, the one-way valve is connected to the dust removal system to prevent environmental pollution and ensure occupational health. The one-way valve can be closed manually.

[0029] In this embodiment, a plurality of universal wheels 7 are provided at the lower end of the frame 8, and a radar is also provided on the frame 8 to facilitate accurate movement and evacuation of the feeding port of the crystallizer, thereby facilitating production.

[0030] When this embodiment is used, the F60 type slag is placed in the slag hopper 1, the sealing cover 2 is covered, and argon gas is introduced for protection; the universal wheel 7 and the radar system are used to move the slag adding mechanism to the designated slag adding position, and the clamping pressure relief device 5 is tightly connected to the feeding port of the crystallizer; during the smelting process of the electroslag furnace, the weighing device 3 weighs continuously, and the slag adding mechanism controls the servo motor 4 according to the NOS415 process parameters in the controller, and automatically controls the slag adding frequency, slag adding speed, and slag adding weight of the spiral feeder according to the weight data transmitted by the weighing device 3, so as to match the NOS415 steel grade smelting process; during the slag adding process, the one-way valve balances the pressure of the smelting furnace and the slag adding mechanism, and the one-way valve can also be connected to the dust removal device to protect the working environment. After the smelting is completed, the surface of the electroslag ingot is observed to be smooth and clean after it is taken out of the furnace, and there is no slag inclusion phenomenon at the tail of the ingot. After ultrasonic non-destructive testing, there is no obvious smelting defect, which means that according to the set slag adding process sheet, the smelting effect is good and the ingot product quality meets the standard.

[0031] The slag hopper 1 of this embodiment is provided with a sealing cover 2, which has the functions of heat preservation and argon protection, and can well ensure the temperature of the slag, moisture-proof and air-isolated, and ensure the quality; the weighing device 3 is connected to the controller, and can automatically add slag at any time according to the set process, and can accurately know the slag adding speed and weight, form a dynamic internal feedback, and accurately put the slag according to the time, which reduces the manual judgment of the timing and weight of adding materials, liberates manual labor, and makes the product quality more excellent; the clamping pressure relief device 5 is clamped with the crystallizer feeding port, and the slag adding mechanism and the remelting furnace form a closed environment to ensure the protective atmosphere environment inside the crystallizer and avoid the introduction of other gases that affect the metallurgical quality; the clamping pressure relief device 5 can balance the pressure between the slag adding mechanism and the remelting furnace to prevent the equipment from inhaling air; the one-way valve can be connected to the dust removal device to protect the working environment and ensure the occupational health of workers; the mobile system composed of the universal wheel 7 and the radar can control the slag adding mechanism to the feeding port when slag needs to be added, and automatically position and lock it, so that the control is more accurate and convenient, saving manpower.

[0032] This embodiment aims at improving the structure, and the control process of the controller is the existing technology.

[0033] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A sealed slag adding mechanism, characterized in that: The machine comprises a frame, a slag hopper is arranged on the frame, a weighing device is arranged at the lower end of the slag hopper, the weighing device is used to weigh the weight of the slag in the slag hopper, the lower end of the slag hopper is connected to a feeder, a clamping pressure relief device is connected to the discharge end of the feeder, the clamping pressure relief device is used to be connected to the crystallizer, and the weighing device and the feeder are both electrically connected to a controller; The slag hopper is provided with a gas connector, which is used to introduce argon gas; the clamping pressure relief device includes a quick connector and a one-way valve, the quick connector is used for connecting the crystallizer, and the one-way valve is arranged at the connection between the quick connector and the discharge end of the feeder, and the one-way valve realizes outward exhaust.

2. The sealed slag adding mechanism according to claim 1, characterized in that: A sealing cover is arranged at the upper end of the slag hopper, a lifting lug is arranged on the sealing cover, a sealing ring is arranged between the sealing cover and the slag hopper, and the slag hopper is in a funnel shape.

3. The sealed slag adding mechanism according to claim 2 is characterized in that: The slag hopper and the sealing cover are both made of stainless steel, and both are provided with an interlayer, and the interlayer is filled with heat-insulating cotton.

4. The sealed slag adding mechanism according to claim 1, characterized in that: The feeder is a screw feeder, and the screw feeder is driven by a servo motor, and the servo motor is electrically connected to the controller.

5. The sealed slag adding mechanism according to claim 1, characterized in that: The one-way valve is connected to the dust removal system.

6. The sealed slag adding mechanism according to claim 1, characterized in that: A plurality of universal wheels are arranged at the lower end of the frame, and a radar is also arranged on the frame.

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