A refining device for producing stainless steel billets

Abstract

The present application discloses a refining device for stainless steel billet production, including a control unit, a furnace body, a furnace cover unit, a heating unit, a blowing unit and a sampling unit, wherein the furnace cover unit includes a first rotating hydraulic cylinder, a cover mounting frame and a cover; the heating unit includes a second rotating hydraulic cylinder, a rotating base plate, a lifting hydraulic cylinder, a heat mounting frame and an arc heating unit, wherein the arc heating unit includes a plurality of electrodes, and the cover has a plurality of electrode through holes that can be passed by a motor; the blowing unit is used to blow gas into the bottom of the furnace body; the sampling unit includes a sampling gun; the cover includes a cover body and a top convex block, and the cover has a sampling through hole, and the sampling gun can be inserted into the sampling through hole. The refining device of the present application can realize automatic cover driving, heating and sampling, and the sampling operation can reduce manual participation, making sampling safer and more standardized.

Description

Technical Field

[0001] The present application relates to the field of stainless steel production, and in particular to a refining device for producing stainless steel billets. Background Art

[0002] Stainless steel is the abbreviation of stainless acid-resistant steel. Steel that is resistant to weak corrosive media such as air, steam, water, or has stainless properties is called stainless steel. In the production process of stainless steel, it needs to go through multiple steps such as refining, continuous casting, steel rolling, and winding. Among them, the refining step will directly determine the content of stainless steel, and thus directly determine the quality of stainless steel. Therefore, the refining step of stainless steel is very critical. The existing stainless steel refining step mainly uses a refining furnace. The refining furnace is a smelting equipment in the hot processing industry, which is a smelting equipment used for deoxidation and alloying of molten steel. Common ones include argon blowing refining furnace, LF refining furnace, etc. The refining of stainless steel in a refining furnace requires blowing, and various materials need to be added for the purpose of deoxidation and slag removal. The molten steel in the stainless steel refining furnace needs to be sampled at different stages of refining, and multiple sampling operations are required during the refining process. Some of the existing sampling operations are performed by manual handheld sampling guns, which are complicated and troublesome to operate. Some of them will interfere with the continuity of stainless steel refining, and manual operation by personnel also has certain safety hazards. In addition, the sampling operations of different operators may not be standardized. Summary of the invention

[0003] Purpose of the invention: It aims to overcome the defects of the prior art and provide a refining device for producing stainless steel billets.

[0004] Technical solution: A refining device for stainless steel production, comprising a control unit, a furnace body, a furnace cover unit, a heating unit, a blowing unit and a sampling unit, wherein the furnace cover unit comprises a first rotating hydraulic cylinder, a cover mounting frame driven by the first rotating hydraulic cylinder and a cover mounted on the cover mounting frame; the heating unit comprises a second rotating hydraulic cylinder, a rotating base plate mounted on the second rotating hydraulic cylinder, a lifting hydraulic cylinder mounted on the rotating base plate, a heating mounting frame mounted on the lifting hydraulic cylinder and an arc heating unit mounted on the heating mounting frame, wherein the arc heating unit comprises a plurality of electrodes, and the cover has a plurality of electrode through holes that can be passed through by a motor; the blowing unit is used to blow gas into the bottom of the furnace body; the sampling unit comprises a sampling gun; the cover comprises a cover body and a top protrusion, and the cover has a sampling through hole, and the sampling gun can be inserted into the sampling through hole.

[0005] Thus, the refining device can realize heating refining, blow working gas from the bottom, and conveniently realize sampling of molten metal at different stages of refining.

[0006] Furthermore, the sampling gun also has a temperature measurement function.

[0007] Furthermore, the outer side of the furnace body is provided with a plurality of annular reinforcement parts, both sides of the furnace body are provided with fixed shafts, and both sides of the furnace body are provided with support frames.

[0008] Thereby facilitating the transportation, installation and support of the furnace body.

[0009] Furthermore, the sampling unit also includes a base, a mounting base fixedly connected to the base through a column, a rotation driving unit installed at the mounting base, a rotating frame driven by the rotation driving unit, a sliding frame capable of translating relative to the rotating frame, a supporting frame fixedly connected to the sliding frame, and a sliding seat installed at the sliding frame, the rotating frame has a bar slide rail, the rotating frame is also equipped with a first motor and a bearing, a first screw rod is connected between the first motor and the bearing, the sliding frame has a bar slide groove matching the bar slide rail and a threaded hole matching the first screw rod; a second motor is installed at the supporting frame, the second motor drives a second screw rod, the sliding frame has a through hole passed by the sliding seat, the through hole has a limiting slider, the sliding seat has a limiting slide groove matching the limiting slider and a threaded channel matching the second screw rod, and the sampling gun is installed at the sliding seat.

[0010] This makes it easier to control the position of the sampling gun, facilitate sampling, and facilitate installation and disassembly of the sampling gun.

[0011] Furthermore, the rotary drive unit includes a rotary motor and a gear box.

[0012] This allows the angle of the turret to be precisely controlled.

[0013] Furthermore, the sliding seat is provided with a fixing sleeve, the fixing sleeve has a socket, the closed end of the socket has a first magnet, the sampling gun includes a gun head for sampling, a rod connected to the gun head, a connecting seat connected to the rod, and a gripping portion located at the rod, the connecting seat can be inserted into the socket, and the connecting seat has a second magnet that can attract the first magnet.

[0014] Therefore, the magnetic adsorption method is adopted to facilitate the installation and disassembly of the sampling gun.

[0015] Furthermore, the gun head includes a sampling unit and a temperature measuring probe.

[0016] The sampling unit is used for sampling, and the temperature measuring probe is used for temperature measurement, realizing temperature measurement and sampling at the same time.

[0017] Furthermore, the gripping portion includes a thermal insulation sleeve and a circular ring-shaped hand guard connected to the thermal insulation sleeve.

[0018] This makes it more convenient for the operator to install and disassemble the sampling gun, facilitates the operation of the sampling gun, and protects the operator.

[0019] Furthermore, a push rod is installed on the sliding frame; baffle cover slide rails are provided on both sides of the top protrusion, a baffle cover capable of closing the sampling through hole is installed on the top protrusion, and the baffle cover has a baffle cover slide groove that cooperates with the baffle cover slide rails; the upper surface of the top protrusion is inclined, and the lower end of the baffle cover slide rail has a block, and when there is no external force, the baffle cover abuts against the blocks at the two baffle cover slide rails, so that the baffle cover closes the sampling through hole; the baffle cover is also connected to a frame portion, and the frame portion includes a first straight rod, a second straight rod connected to and perpendicular to the first straight rod, a transition rod connected to the second straight rod, and an arc rod connected to the transition rod, and the first straight rod and the arc rod are both connected to the baffle cover; the push rod can abut against the frame portion and push the frame portion.

[0020] Furthermore, when the push rod abuts against the second straight rod, the blocking cover does not completely cover the sampling through hole.

[0021] Furthermore, the angle between the inclined plane and the horizontal plane is between 20-70 degrees.

[0022] Furthermore, the blowing unit is used to blow argon gas into the bottom of the furnace body.

[0023] Argon needs to be blown in at different stages of refining to stir the molten metal while providing a good gas environment for refining.

[0024] Furthermore, the push rod includes an abutment head capable of abutting against the frame portion, a rod body connected to the abutment head, and a plurality of reinforcing ribs connecting the rod body and the sliding frame.

[0025] Furthermore, the end of the abutment head has a mounting groove, and a temperature sensor is installed in the mounting groove.

[0026] Furthermore, the refining device is a LF refining device.

[0027] Furthermore, the refining device also includes a feeding unit and a wire feeding unit.

[0028] Therefore, the feeding unit can add various required materials such as ferroalloys, deoxidizers, slag forming agents, etc.

[0029] In other embodiments, the structure of the present application can also be used in other types of refining furnaces.

[0030] Beneficial effects: The refining furnace of the present application adopts arc heating to achieve efficient heating, energy saving, and precise temperature control, and the spatial position control of the heating unit, the cover unit, and the sampling unit adopts electrical automation control, which makes the position control more precise and reduces manual participation.

[0031] The refining device of the present application achieves better improvements on the sampling unit, so that the sampling process can realize automatic sampling, avoiding the operator from being too close to the refining device, and making the installation and disassembly of the sampling gun more convenient, thereby making the sampling of the refining process more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of normal refining, and the sampling gun can be installed at this time;

[0033] Figure 2 exist Figure 1 On the basis of, the rotating frame rotates 180 degrees;

[0034] Figure 3 The rotating frame is stationary, and the sliding frame moves horizontally, so that the push rod abuts against the frame and pushes the shield upward;

[0035] Figure 4 exist Figure 3 On the basis of, the shield continues to move upward to expose the sampling through hole;

[0036] Figure 5 The sampling gun is inserted into the furnace to take samples;

[0037] Figure 6 The sampling gun exits the furnace body;

[0038] Figure 7 The sliding frame does not translate relative to the rotating frame, and the rotating frame rotates at a certain angle so that the abutment head is located above the sampling through hole, and at this time the shield moves downward to cover the sampling through hole;

[0039] Figure 8 The turret continues to rotate, making it easier to remove the sampling gun. DETAILED DESCRIPTION

[0040] Reference numerals: 1 furnace body; 1.1 annular reinforcement portion; 1.2 support frame; 1.3 fixed shaft;

[0041] 2.1 first rotary hydraulic cylinder; 2.2 cover mounting frame; 2.3 cover; 2.3.1 electrode through hole; 2.4 top protrusion; 2.5 shield slide rail; 2.5.1 block; 2.6 shield; 2.6.1 first straight rod; 2.6.2 second straight rod; 2.6.3 transition rod; 2.6.4 arc rod; 2.7 sampling through hole;

[0042] 3.1 second rotary hydraulic cylinder; 3.2 rotating substrate; 3.3 lifting hydraulic cylinder; 3.4 heating mounting frame; 3.5 arc heating unit; 3.6 electrode;

[0043] 4.1 Base; 4.2 Column; 4.3 Mounting seat; 4.4 Rotary drive unit; 4.5 Rotating frame; 4.5.1 Strip slide rail; 4.5.2 First screw rod; 4.5.3 First motor; 4.6 Sliding frame; 4.6.1 Limiting slider; 4.7 Support frame; 4.7.1 Second motor; 4.7.2 Second screw rod; 4.8 Sliding seat; 4.8.1 Fixed sleeve; 4.8.2 Limiting slide groove; 4.9 Sampling gun; 4.9.1 Rod; 4.9.2 Gun head; 4.9.3 Connecting seat; 4.9.4 Insulation sleeve; 4.9.5 Finger guard; 4.10 Push rod; 4.10.1 Rod body; 4.10.2 Butt joint; 4.10.3 Reinforcement rib; 4.10.4 Temperature sensor.

[0044] The following is a detailed description in conjunction with the accompanying drawings: As shown in the figure, a refining device for producing stainless steel billets includes a control unit, a furnace body 1, a furnace cover unit, a heating unit, a blowing unit and a sampling unit, the outer side of the furnace body 1 has a plurality of annular reinforcement parts 1.1, the two sides of the furnace body 1 have fixed shafts 1.3, and the two sides of the furnace body 1 also have support frames 1.2. The blowing unit is used to blow argon gas into the bottom of the furnace body. The furnace cover unit includes a first rotating hydraulic cylinder 2.1, a cover mounting frame 2.2 driven by the first rotating hydraulic cylinder 2.1, and a cover 2.3 installed at the cover mounting frame 2.2; the heating unit includes a second rotating hydraulic cylinder 3.1, a rotating base plate 3.2 installed at the second rotating hydraulic cylinder 3.1, a lifting hydraulic cylinder 3.3 installed at the rotating base plate 3.2, a heating mounting frame 3.4 installed at the lifting hydraulic cylinder 3.3, and an arc heating unit 3.5 installed at the heating mounting frame 3.4, the arc heating unit 3.5 includes a plurality of electrodes 3.6, and the cover 2.3 has a plurality of electrode through holes 2.3.1 that can be passed by the motor; the blowing unit is used to blow gas into the bottom of the furnace body; the sampling unit includes a sampling gun 4.9; the cover 2.3 includes a cover body and a top protrusion 2.4, the cover has a sampling through hole 2.7, and the sampling gun 4.9 can be inserted into the sampling through hole 2.7.

[0045] The sampling unit also includes a base 4.1, a mounting seat 4.3 fixedly connected to the base 4.1 through a column 4.2, a rotation drive unit 4.4 installed at the mounting seat 4.3, a rotating frame 4.5 driven by the rotation drive unit 4.4, a sliding frame 4.6 capable of translation relative to the rotating frame 4.5, a supporting frame 4.7 fixedly connected to the sliding frame 4.6 and a sliding seat 4.8 installed at the sliding frame 4.6, the rotating frame 4.5 has a strip slide rail 4.5.1, the rotating frame 4.5 is also installed with a first motor 4.5.3 and a bearing, and a first The screw rod 4.5.2, the sliding frame 4.6 has a strip slide groove cooperating with the strip slide rail 4.5.1 and a threaded hole cooperating with the first screw rod 4.5.2; the support frame 4.7 is installed with a second motor 4.7.1, the second motor 4.7.1 drives the second screw rod 4.7.2, the sliding frame 4.6 has a through hole passed by the sliding seat 4.8, the through hole has a limit slider 4.6.1, the sliding seat 4.8 has a limit slide groove cooperating with the limit slider 4.6.1 and a threaded channel cooperating with the second screw rod 4.7.2, and the sampling gun 4.9 is installed on the sliding seat 4.8. The sliding seat 4.8 is provided with a fixed sleeve 4.8.1, and the fixed sleeve 4.8.1 has a socket, and the closed end of the socket has a first magnet. The sampling gun 4.9 includes a gun head 4.9.2 for sampling (the gun head can be any gun head in the prior art as long as it can achieve sampling, and the gun head can be used for sampling. The sampling unit preferably has a sampling chamber with a negative pressure, such as the sampling heads disclosed in patents CN203606171U, CN107796666A, and CN206192696U), a rod 4.9.1 connected to the gun head 4.9.2, a connecting seat 4.9.3 connected to the rod 4.9.1, and a gripping portion located at the rod 4.9.1, the connecting seat 4.9.3 can be inserted into the socket, and the connecting seat 4.9.3 has a second magnet that can attract the first magnet. The gripping portion comprises a thermal insulation sleeve 4.9.4 and a circular hand guard 4.9.5 connected to the thermal insulation sleeve 4.9.4.

[0046] A push rod 4.10 is installed at the sliding frame 4.6; shield slide rails 2.5 are provided on both sides of the top protrusion 2.4; a shield capable of closing the sampling through hole 2.7 is installed at the top protrusion 2.4; the shield 2.6 has a shield slide groove that cooperates with the shield slide rail 2.5; the upper surface of the top protrusion 2.4 is inclined, and the lower end of the shield slide rail 2.5 has a block 2.5.1. When there is no external force, the shield 2.6 abuts against the blocks 2.5.1 at the two shield slide rails 2.5, so that the shield 2.6 closes the sampling through hole 2.7; the shield A frame portion is also connected to 2.6, and the frame portion includes a first straight rod 2.6.1, a second straight rod 2.6.2 connected to and perpendicular to the first straight rod 2.6.1, a transition rod 2.6.3 connected to the second straight rod 2.6.2, and an arc rod 2.6.4 connected to the transition rod 2.6.3, and the first straight rod 2.6.1 and the arc rod 2.6.4 are both connected to the blocking cover 2.6; the push rod 4.10 can abut against the frame portion and push the frame portion, and when the push rod 4.10 abuts against the second straight rod 2.6.2, the blocking cover 2.6 does not block the sampling through hole 2.7.

[0047] The push rod 4.10 comprises an abutment head 4.10.2 capable of abutting against the frame, a rod body 4.10.1 connected to the abutment head 4.10.2, and a plurality of reinforcing ribs 4.10.3 connecting the rod body 4.10.1 and the sliding frame 4.6. The end of the abutment head 4.10.2 has an installation groove, and a temperature sensor 4.10.4 is installed in the installation groove.

[0048] During the refining process of stainless steel refining furnace, it is necessary to sample and test the molten steel many times. On the one hand, the movement of the cover and the movement of the heating unit of the device of the present application can be electrically driven, so that the operation is more convenient, and the sampling unit can also be electrically driven, which is very convenient. The specific sampling steps are as follows:

[0049] like Figure 1 As shown in FIG. 1 , in this position, the sliding seat is farther from the furnace body and is located at a lower position, so that the operator can easily install the sampling gun. Figure 2 As shown, the rotary drive unit can drive the rotating frame to rotate, thereby rotating to Figure 2 Then Figure 3 As shown, the sliding frame can achieve translational movement under the drive of the first motor, so that the abutting head can abut the frame and push the frame, thereby pushing the frame to move upward until Figure 4 The sampling hole is completely exposed. Figure 5 As shown, driven by the second motor, the sliding seat moves downward, so that the sampling gun can sample the molten steel (in some embodiments, the sampling gun has a temperature measurement function, and performs sampling and temperature measurement at the same time); then as shown Figure 6 As shown in the figure, after sampling is completed, the sliding seat rises, allowing the sampling gun to exit the furnace body. Figure 7 As shown, the sliding frame does not translate relative to the rotating frame, and the rotation driving unit drives the rotating frame to rotate to the position shown in the figure, so that at this time the temperature sensor at the abutment joint is just located above the sampling through hole. At this time, since the abutment joint and the frame portion are not in abutment, the shield will move down to block the sampling through hole. When the shield moves down under the action of gravity to block the sampling through hole, the temperature measurement value of the temperature sensor will drop significantly due to the sampling through hole being blocked. Therefore, the measurement value of the temperature sensor can be used to judge that the shield has smoothly slid down to close the sampling through hole (avoiding the inability to restore the blocking of the sampling through hole due to the poor sliding of the shield). After confirmation (the confirmation time is very short, in Figure 7 The rotating drive unit drives the rotating frame to continue to rotate downward until it reaches Figure 8 position, so that the operator can easily remove the sampling gun at this time, and then take out the sample for analysis in the subsequent steps.

[0050] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be appreciated by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. A refining device for producing stainless steel billets, characterized in that: It includes a control unit, a furnace body, a furnace cover unit, a heating unit, an air blowing unit and a sampling unit, wherein the furnace cover unit includes a first rotating hydraulic cylinder, a cover mounting frame driven by the first rotating hydraulic cylinder and a cover mounted on the cover mounting frame; the heating unit includes a second rotating hydraulic cylinder, a rotating base plate mounted on the second rotating hydraulic cylinder, a lifting hydraulic cylinder mounted on the rotating base plate, a heating mounting frame mounted on the lifting hydraulic cylinder and an arc heating unit installed on the heating mounting frame, wherein the arc heating unit includes a plurality of electrodes, and the cover has a plurality of electrode through holes through which the electrodes can pass; the air blowing unit is used to blow gas into the bottom of the furnace body; the sampling unit includes a sampling gun; the cover includes a cover body and a top protrusion, the cover has a sampling through hole, and the sampling gun can be inserted into the sampling through hole; the outer side of the furnace body has a plurality of annular reinforcement parts, and the two sides of the furnace body have fixed shafts. The furnace body also has a support frame on both sides; the sampling unit also includes a base, a mounting seat fixedly connected to the base through a column, a rotation driving unit installed at the mounting seat, a rotating frame driven by the rotation driving unit, a sliding frame that can translate relative to the rotating frame, a supporting frame fixedly connected to the sliding frame, and a sliding seat installed at the sliding frame. The rotating frame has a bar slide rail, and the rotating frame is also installed with a first motor and a bearing, a first screw rod is connected between the first motor and the bearing, and the sliding frame has a bar slide groove that cooperates with the bar slide rail and a threaded hole that cooperates with the first screw rod; a second motor is installed on the support frame, and the second motor drives a second screw rod, the sliding frame has a through hole passed by the sliding seat, the through hole has a limiting slider, the sliding seat has a limiting slide groove that cooperates with the limiting slider and a threaded channel that cooperates with the second screw rod, and the sampling gun is installed on the sliding seat.

2. The refining device for producing stainless steel billets according to claim 1, characterized in that: The sliding seat is provided with a fixing sleeve, the fixing sleeve has a socket, the closed end of the socket has a first magnet, the sampling gun includes a gun head for sampling, a rod connected to the gun head, a connecting seat connected to the rod, and a gripping portion located at the rod, the connecting seat can be inserted into the socket, and the connecting seat has a second magnet that can attract the first magnet.

3. The refining device for producing stainless steel billets according to claim 2, characterized in that: The gripping portion comprises a thermal insulation sleeve and a circular ring-shaped hand guard connected to the thermal insulation sleeve.

4. The refining device for producing stainless steel billets according to claim 2, characterized in that: A push rod is installed on the sliding frame; baffle cover slide rails are provided on both sides of the top protrusion, a baffle cover capable of closing the sampling through hole is installed on the top protrusion, and the baffle cover has a baffle cover slide groove that cooperates with the baffle cover slide rails; the upper surface of the top protrusion is inclined, and the lower end of the baffle cover slide rail has a block, and when there is no external force, the baffle cover abuts against the blocks at the two baffle cover slide rails, so that the baffle cover closes the sampling through hole; a frame portion is also connected to the baffle cover, and the frame portion includes a first straight rod, a second straight rod connected to and perpendicular to the first straight rod, a transition rod connected to the second straight rod, and an arc rod connected to the transition rod, and the first straight rod and the arc rod are both connected to the baffle cover; the push rod can abut against the frame portion and push the frame portion.

5. The refining device for producing stainless steel billets according to claim 1, characterized in that: The blowing unit is used to blow argon gas into the bottom of the furnace body.

6. The refining device for producing stainless steel billets according to claim 4, characterized in that: The push rod comprises an abutment head capable of abutting against the frame, a rod body connected to the abutment head, and a plurality of reinforcing ribs connecting the rod body and the sliding frame.

7. The refining device for producing stainless steel billets according to claim 6, characterized in that: The end of the abutment head is provided with a mounting groove, and a temperature sensor is mounted in the mounting groove.

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