A method for refining molten steel using vibration stirring and a vibration stirring device for a ladle car.

Abstract

This invention discloses a method for refining molten steel using vibration stirring and a ladle car vibration stirring device, relating to the field of metal smelting technology. The method includes controlling the ladle car to reciprocate along a transfer track to cause the molten steel inside the ladle to oscillate back and forth along the Y-axis, and controlling the ladle saddle of the ladle car to reciprocate relative to the car frame to cause the molten steel to oscillate back and forth along the X-axis; and / or controlling the ladle car to rotate around the Z-axis to cause the molten steel to rotate and oscillate around the Z-axis. Using the reciprocating movement and / or rotational movement of the ladle saddle as external excitation, the molten steel inside the ladle undergoes forced vibration, thereby stirring and mixing the molten steel. This results in less temperature loss, lower energy consumption, and higher refined steel quality.

Description

Technical Field

[0001] This invention relates to the field of metal smelting technology, and more specifically, to a method for refining molten steel using vibration stirring. Furthermore, this invention also provides a ladle car vibration stirring device for the above-mentioned vibration stirring method for refining molten steel. Background Technology

[0002] Steel stirring technology is the core method and driving force of ladle refining, directly affecting steel quality and refining effect. Currently, steel stirring in ladle refining is mainly achieved through bottom-blowing argon gas stirring technology in the ladle.

[0003] However, the bottom-blowing argon gas stirring technology in steel ladles has the following disadvantages:

[0004] Firstly, argon gas carries away a large amount of heat from the molten steel it comes into contact with through thermal conduction and convection, resulting in significant temperature loss and high energy consumption during the refining process.

[0005] Secondly, the rising of argon gas causes the surrounding molten steel to surge upwards, squeezing the slag layer covering the surface of the molten steel outwards, resulting in an exposed steel area in the center of the ladle without slag coverage. The exposed molten steel reacts with oxygen, water vapor, and carbon dioxide in the air, causing secondary oxidation of the molten steel. At the same time, nitrogen in the air dissolves rapidly into the molten steel, causing abnormal nitrogen absorption and increase in nitrogen in the molten steel, resulting in excessive inclusions.

[0006] In conclusion, how to reduce the energy consumption of molten steel stirring while ensuring the quality of molten steel refining is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide a method for refining molten steel by vibration stirring, which uses the reciprocating movement and / or rotation of the ladle saddle as an external excitation to cause forced vibration of the molten steel in the ladle, thereby stirring and mixing the molten steel. This method results in less temperature loss, lower energy consumption, and higher quality steel refining.

[0008] In addition, the present invention also provides a ladle car vibration stirring device for the above-mentioned vibration stirring steel refining method.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A method for refining molten steel using vibration stirring includes:

[0011] The ladle car is controlled to move back and forth along the transfer track so as to drive the molten steel in the ladle to oscillate back and forth along the Y-axis, and the ladle saddle of the ladle car is controlled to move back and forth relative to the frame so as to drive the molten steel to oscillate back and forth along the X-axis.

[0012] And / or control the ladle car to rotate around the Z-axis so as to drive the molten steel to rotate and oscillate around the Z-axis.

[0013] Preferably, the mechanism for controlling the traveling of the ladle car causes the ladle car to reciprocate along the transfer track, comprising:

[0014] Input the preset Y-axis travel and preset Y-axis movement frequency of the ladle car into the control device;

[0015] The traveling mechanism is controlled to reciprocate within the preset Y-axis travel frequency.

[0016] Preferably, controlling the reciprocating movement of the ladle saddle of the ladle car relative to the car frame includes:

[0017] Input the preset X-axis stroke and preset X-axis movement frequency of the ladle saddle into the control device;

[0018] The ladle saddle is controlled to reciprocate within the preset X-axis travel frequency.

[0019] Preferably, controlling the ladle car to rotate around the Z-axis includes:

[0020] Input the preset rotation frequency of the ladle saddle into the control device;

[0021] The ladle saddle is controlled to rotate around the Z-axis at the preset rotation frequency.

[0022] Preferably, it further includes controlling the ladle car to reciprocate along the Z-axis so as to drive the molten steel to oscillate up and down along the Z-axis.

[0023] Preferably, controlling the ladle car to reciprocate along the Z-axis includes:

[0024] Input the preset Z-axis stroke and preset Z-axis movement frequency of the ladle car into the control device;

[0025] The ladle car is controlled to reciprocate within the preset Z-axis travel frequency.

[0026] A ladle car vibration stirring device for the steel refining method described in any of the above claims includes a frame, a ladle saddle for mounting and clamping a ladle is provided at the top of the frame, and a traveling mechanism is provided at the bottom of the frame. The traveling mechanism is connected to a traveling power mechanism to drive the traveling mechanism to move along a transfer track on the workshop floor.

[0027] An X-axis moving mechanism is provided between the vehicle frame and the steel ladle saddle. The X-axis moving mechanism is connected to the X-axis power mechanism so as to drive the X-axis power mechanism to move relative to the vehicle frame along the X-axis.

[0028] And / or the bottom of the transfer track is provided with a slewing mechanism, which is connected to a slewing power mechanism to drive the transfer track to rotate around the Z-axis;

[0029] The walking power mechanism, the X-axis moving mechanism, and the rotary power mechanism are all signal-connected to the control device.

[0030] Preferably, the system further includes a Z-axis moving mechanism disposed between the vehicle frame and the steel saddle, the Z-axis moving mechanism being connected to a Z-axis power mechanism to drive the Z-axis power mechanism to move relative to the vehicle frame along the Z-axis.

[0031] Preferably, the control device includes a PLC master control module and several external drivers. The PLC master control module is signal-connected to the external drivers, and the traveling power mechanism, the X-axis power mechanism, and the rotary power mechanism are all configured to correspond one-to-one with the external drivers.

[0032] Preferably, the PLC master control module is equipped with several control buttons, and each control button is set to correspond one-to-one with a different refining mode of the ladle refining.

[0033] The vibratory stirring steel refining method provided by this invention utilizes the reciprocating movement of the ladle car along the transfer track to drive the molten steel in the ladle to oscillate back and forth along the Y-axis, thereby causing the molten steel to undergo one-dimensional vibration in the Y-axis direction; utilizes the reciprocating movement of the ladle saddle along the vibration track to drive the molten steel to oscillate back and forth along the X-axis, thereby causing the molten steel to undergo one-dimensional vibration in the X-axis direction; and utilizes the rotational motion of the ladle car to drive the molten steel in the ladle to rotate and oscillate around the Z-axis.

[0034] Therefore, the above-mentioned vibration stirring steel refining method can use the reciprocating movement and / or rotation of the ladle saddle as an external excitation to cause forced vibration of the molten steel in the ladle, thereby stirring and mixing the molten steel.

[0035] Compared to existing bottom-blown argon stirring technology, only a small amount of nitrogen or even no nitrogen is introduced, which significantly reduces the heat loss caused by nitrogen introduction. The temperature loss is small and the energy consumption is lower. At the same time, it avoids the problem of internal thermal convection of molten steel after nitrogen is introduced, thereby solving the problems of secondary oxidation, abnormal nitrogen increase and excessive inclusions, and effectively improving the refining quality of molten steel.

[0036] In addition, the present invention also provides a ladle car vibration stirring device for the above-mentioned vibration stirring steel refining method. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0038] Figure 1 A simplified structural diagram in the front view of a specific embodiment of the steel ladle car vibration mixing device provided by the present invention;

[0039] Figure 2 A simplified structural diagram of the vibrating agitator for a ladle car, viewed from above.

[0040] Figure 3 This is a schematic diagram of the structure of a specific embodiment of the steel ladle car vibration mixing device provided by the present invention in the front view direction.

[0041] Figures 1-3 middle:

[0042] 01-Transfer track; 011-Rail turntable; 1-Car frame; 2-Y-axis vibration table; 3-X-axis vibration table; 4-Ladle saddle. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] The core of this invention is to provide a vibration stirring method for refining molten steel, which uses the reciprocating movement and / or rotation of the ladle saddle as an external excitation to cause forced vibration of the molten steel in the ladle, thereby stirring and mixing the molten steel. This method results in less temperature loss, lower energy consumption, and higher quality steel refining.

[0045] In addition, the present invention also provides a ladle car vibration stirring device for the above-mentioned vibration stirring steel refining method.

[0046] The vibratory stirring steel refining method provided by this invention includes:

[0047] Step S11: Control the ladle car to move back and forth along the transfer track 01 so as to drive the molten steel in the ladle to oscillate back and forth along the Y-axis direction, and control the ladle saddle 4 of the ladle car to move back and forth relative to the frame 1 so as to drive the molten steel to oscillate back and forth along the X-axis direction.

[0048] And / or, in step S12, control the ladle car to rotate around the Z-axis so as to drive the molten steel to rotate and oscillate around the Z-axis.

[0049] The ladle car moves back and forth along the Y-axis of the transfer track 01, which can cause the molten steel in the ladle to oscillate back and forth along the Y-axis, making the molten steel sway in a one-dimensional wave-like motion in the Y-axis direction; the ladle saddle 4 moves back and forth along the X-axis of the vibration track, which can cause the molten steel to vibrate back and forth along the X-axis, making the molten steel sway in a one-dimensional wave-like motion in the X-axis direction; the back and forth wave-like motion of the molten steel in the Y-axis direction and the back and forth wave-like motion of the molten steel in the X-axis direction can be superimposed to achieve two-dimensional wave-like motion of the molten steel in the horizontal plane, which can achieve both horizontal mixing of the molten steel and mixing of the molten steel in the Z-axis direction through the back and forth undulation of the liquid surface, thus achieving vertical mixing of the molten steel.

[0050] By utilizing the rotational motion of the ladle car, the molten steel inside the ladle is driven to rotate and oscillate around the Z-axis, causing the molten steel to form a rotating circulation and radial bulge, thus achieving horizontal and vertical mixing of the molten steel.

[0051] It should be noted that the reciprocating movement of the ladle car along the Y-axis, the reciprocating movement of the ladle saddle 4 along the X-axis, and the rotation of the ladle car can be performed in stages or simultaneously.

[0052] When the molten steel inside the ladle is subjected to three external stimuli at the same time, it is necessary to strictly control the vibration amplitude and frequency of various forced vibrations in order to avoid excessive vibration amplitude or resonance that could cause the molten steel to overflow from the ladle, or excessive vibration amplitude that could cause the refining equipment inserted into the molten steel, such as the LF heating electrode and the RH vacuum chamber insertion tube, to break.

[0053] In this embodiment, the vibration-stirring steel refining method uses the reciprocating movement and / or rotation of the ladle saddle 4 as an external excitation to force vibration of the molten steel inside the ladle, thereby stirring and mixing the molten steel. Compared with existing bottom-blowing argon stirring technology, only a small amount of nitrogen or even no nitrogen is introduced, significantly reducing the heat loss caused by nitrogen introduction. This results in less temperature loss and lower energy consumption, while avoiding the internal thermal convection problem of molten steel after nitrogen introduction. This solves the problems of secondary oxidation, abnormal nitrogen addition, and excessive inclusions, effectively improving the quality of molten steel refining.

[0054] Preferably, step S11, controlling the traveling mechanism of the ladle car to move the ladle car back and forth along the transfer track 01, includes:

[0055] Input the preset Y-axis travel and preset Y-axis movement frequency of the ladle car into the control device;

[0056] The traveling mechanism is controlled to move back and forth within a preset Y-axis travel range at a preset Y-axis movement frequency.

[0057] The back-and-forth wavy oscillation of molten steel in the Y-axis direction is a forced vibration. The frequency of the forced vibration is determined by the excitation frequency of the ladle car. Therefore, the preset Y-axis stroke and preset Y-axis movement frequency of the ladle car together affect the amplitude and frequency of the forced vibration of molten steel in the Y-axis direction.

[0058] It should be noted that, in order to avoid large areas of exposed steel on the liquid surface due to fluctuations in the liquid level, which would affect the refining quality, the preset Y-axis movement frequency of the ladle car cannot be the same as the natural sloshing frequency of the molten steel, so as to avoid resonance between the ladle car and the molten steel. The natural sloshing frequency of the molten steel is determined according to the structure and size of the ladle and the liquid level height, and is not affected by the Y-axis movement frequency of the ladle car.

[0059] Preferably, step S11, controlling the reciprocating movement of the ladle saddle 4 of the ladle car relative to the frame 1, includes:

[0060] Input the preset X-axis stroke and preset X-axis movement frequency of the ladle saddle 4 into the control device;

[0061] The ladle saddle 4 is controlled to move back and forth within a preset X-axis travel frequency.

[0062] The back-and-forth undulating motion of molten steel in the X-axis direction is also a form of forced vibration. The frequency of forced vibration is determined by the excitation frequency of the ladle saddle 4. Therefore, the preset X-axis stroke and preset X-axis movement frequency of the ladle saddle 4 jointly affect the amplitude and frequency of the forced vibration of molten steel in the X-axis direction. The X-axis stroke and preset X-axis movement frequency of the ladle saddle 4 are determined according to the actual stirring vibration requirements in production, as long as the inherent swaying frequency of the molten steel is avoided and resonance is prevented.

[0063] Preferably, step S12, controlling the ladle car to rotate around the Z-axis, includes:

[0064] Input the preset rotation frequency of the ladle saddle 4 into the control device;

[0065] Control the ladle saddle 4 to rotate around the Z-axis at a preset rotation frequency.

[0066] The Z-axis rotational oscillation of molten steel is a forced rotation. When the ladle saddle 4 rotates at a constant speed, the molten steel is in a stable forced rotational state, and its rotational oscillation frequency is basically equal to the preset rotational frequency of the ladle saddle 4. However, when the ladle saddle rotates at a non-uniform speed, the molten steel is affected by tangential inertial force in addition to centrifugal force. The vibration of the molten steel is affected by both the external excitation spectrum and its own inherent swaying frequency. At this time, turbulence such as swirling flow will appear on the liquid surface, which has a better effect on the uniform mixing of the molten steel, but it is also more likely to increase the exposed steel area and affect the refining quality of the molten steel.

[0067] Preferably, considering the mixing effect of molten steel and the problem of exposed steel on the liquid surface, the ladle saddle 4 can be controlled to perform reciprocating rotational motion.

[0068] The ladle saddle 4 rotates forward at a preset rotation frequency n and preset speed v, then rotates backward at a preset rotation frequency n and preset speed v, and then rotates backward at a preset rotation angle α after stopping. Compared with the rotary motion of acceleration and deceleration, this method makes it easier to control the three-dimensional rotational oscillation state of the molten steel.

[0069] Based on the above embodiments, in order to improve the quality of vibration stirring, the vibration stirring molten steel refining method may further include step S2, controlling the ladle car to move back and forth along the Z-axis so as to drive the molten steel to oscillate up and down along the Z-axis.

[0070] The X-axis and Y-axis oscillations in step S11 are mainly two-dimensional vibrations in the horizontal plane with relatively small fluctuations in the height direction. Similarly, the Z-axis rotation in step S12 is mainly a rotational oscillation in the horizontal plane with relatively small fluctuations in the axial direction. Controlling the ladle car to move back and forth along the Z-axis can control the up-and-down oscillation of the molten steel along the Z-axis, enhancing the mixing effect of the molten steel and thus improving the uniformity of the molten steel.

[0071] It is necessary to explain step S2, which involves controlling the ladle car to reciprocate along the Z-axis, including:

[0072] Input the preset Z-axis travel and preset Z-axis movement frequency of the ladle car into the control device;

[0073] The ladle car is controlled to move back and forth within a preset Z-axis travel frequency.

[0074] The back-and-forth undulating motion of molten steel in the Z-axis direction is also a forced vibration. The frequency of the forced vibration is determined by the excitation frequency of the ladle saddle 4. Therefore, the preset Z-axis stroke and preset Z-axis movement frequency of the ladle saddle 4 jointly affect the amplitude and frequency of the forced vibration in the Z-axis direction of the molten steel. The Z-axis stroke and preset Z-axis movement frequency of the ladle saddle 4 are determined according to the stirring vibration requirements in actual production, as long as the inherent swaying frequency of the molten steel is avoided and resonance is prevented.

[0075] In addition to the above-mentioned vibratory stirring steel refining method, the present invention also provides a ladle car vibratory stirring device for the vibratory stirring steel refining method disclosed in the above embodiments. The ladle car vibratory stirring device includes a frame 1, a ladle saddle 4 for mounting and fixing the ladle is provided on the top of the frame 1, and a traveling mechanism is provided at the bottom of the frame 1. The traveling mechanism is connected to the traveling power mechanism so as to drive the traveling mechanism to move along the transfer track 01 on the workshop floor.

[0076] An X-axis moving mechanism is provided between the frame 1 and the steel saddle 4. The X-axis moving mechanism is connected to the X-axis power mechanism so as to drive the X-axis power mechanism to move relative to the frame 1 along the X-axis.

[0077] The bottom of the transfer track 01 is provided with a rotary mechanism, which is connected to a rotary power mechanism to drive the transfer track 01 to rotate around the Z-axis;

[0078] The traveling power mechanism, the X-axis moving mechanism, and the rotary power mechanism are all connected to the control device via signals.

[0079] The traveling mechanism moves along the transfer track 01 on the bottom of the workshop. Specifically, the traveling mechanism can be configured as traveling wheels, which slide in conjunction with the transfer track 01 to restrict the movement direction of the ladle car and guide and limit the ladle car.

[0080] An X-axis moving mechanism is provided between the frame 1 and the ladle saddle 4 for mounting and fixing the ladle. The X-axis moving mechanism can be specifically configured as a guide rail slider mechanism and a ball screw mechanism. The maximum stroke of the X-axis moving mechanism is determined according to the preset X-axis stroke of the ladle saddle 4 in actual production, so as to ensure that the maximum stroke of the X-axis moving mechanism is greater than or equal to the preset X-axis stroke.

[0081] Of course, an additional Y-axis moving mechanism can also be set between the ladle saddle 4 and the ladle car frame 1. The Y-axis moving mechanism can be set between the frame 1 and the fixed end of the X-axis moving mechanism, or between the moving end of the X-axis moving mechanism and the ladle saddle 4.

[0082] To prevent collisions between the traveling mechanism, X-axis moving mechanism, and Y-axis moving mechanism during transport, and to protect these moving mechanisms and extend their service life, preferably, the traveling power mechanism can be installed inside the Y-axis vibration table 2, and the X-axis moving mechanism can be installed inside the X-axis vibration table 3. Figure 1 As shown; or the Y-axis moving mechanism can be installed inside the Y-axis vibration table 2, and the X-axis moving mechanism can be installed inside the X-axis vibration table 3, as shown. Figure 3 As shown.

[0083] The slewing mechanism drives the ladle saddle 4 to rotate around the Z-axis. To reduce the modification cost of the vibratory mixing device relative to the existing ladle car, the slewing mechanism can be set at the bottom of the transfer track 01. The slewing mechanism of the track transfer system drives the ladle car and its ladle saddle 4 to rotate. The track transfer system includes several transfer tracks 01. Track turntables 011 are provided at the intersections of L-shaped, T-shaped, and cross-shaped tracks 01. The existing track turntables 011 are used as the slewing mechanism for the ladle saddle 4. Figure 2 As shown.

[0084] Of course, a slewing mechanism can also be additionally set between the ladle saddle 4 and the ladle car frame 1. The slewing mechanism can be set between the frame 1 and the fixed end of the X-axis moving mechanism, or between the moving end of the X-axis moving mechanism and the ladle saddle 4.

[0085] Moving motion mechanisms, X-axis power mechanisms, rotary power mechanisms, and Z-axis power mechanisms can be collectively referred to as vibration power mechanisms. Vibration power mechanisms can all be configured with servo motors, hydraulic cylinders, pneumatic cylinders, etc., and their specific types and models are determined based on the design vibration requirements and maximum power consumption in actual production.

[0086] The traveling power mechanism, the X-axis power mechanism, and the slewing power mechanism are all connected to the control device to control the Y-axis moving frequency, X-axis moving frequency, and Z-axis rotating frequency of the ladle car, thereby controlling the Y-axis vibration frequency, X-axis vibration frequency, and Z-axis rotating frequency of the molten steel.

[0087] Preferably, the control device includes a PLC main control module and several external drivers. The PLC main control module and the external drivers are connected by signals, and the traveling power mechanism, X-axis power mechanism and rotary power mechanism are set up one-to-one with the external drivers.

[0088] The PLC master control module is used to receive external commands and control the working status of each vibration power mechanism through each external driver. The external driver is used to drive the corresponding vibration power mechanism. Considering that the driver is in a high-temperature vibration environment, the built-in controller is easily damaged. Therefore, the external driver is used to independently control each vibration power mechanism. The external driver can be repaired and replaced without disassembling the vibration power mechanism, resulting in shorter downtime, lower maintenance time cost, and stronger maintainability.

[0089] In this embodiment, a traveling mechanism, an X-axis moving mechanism, and a rotating mechanism are used to drive the ladle car to move and / or rotate in two dimensions in the horizontal plane, thereby stimulating the molten steel to undergo forced vibration and achieving stirring of the molten steel. Compared with bottom-blown argon stirring technology, only a small amount of argon gas needs to be introduced or even none at all, greatly reducing the amount of argon gas introduced, resulting in low maintenance costs for the permeable bricks and reducing the large amount of heat loss caused by the introduction of argon gas, significantly reducing stirring costs. At the same time, during the stirring process, the slag layer on the surface of the molten steel is well covered, and the exposed steel area is greatly reduced or even disappeared, effectively mitigating the problems of secondary oxidation and abnormal nitrogen increase caused by the introduction of argon gas, which is conducive to improving the refining quality of molten steel.

[0090] In addition, the traveling and rotating mechanisms of the ladle car vibration mixing device utilize the existing structure of the existing ladle refining system, resulting in low modification costs.

[0091] Preferably, the vibratory mixing device further includes a Z-axis moving mechanism disposed between the frame 1 and the steel ladle saddle 4. The Z-axis moving mechanism is connected to the Z-axis power mechanism so as to drive the Z-axis power mechanism to move relative to the frame 1 along the Z-axis.

[0092] The Z-axis moving mechanism can be located between the frame 1 and the fixed end of the X-axis moving mechanism, or between the moving end of the X-axis moving mechanism and the steel ladle saddle 4. In order to reduce the load and power consumption of the Z-axis moving mechanism, it is preferable to set the Z-axis moving mechanism between the moving end of the X-axis moving mechanism and the steel ladle saddle 4.

[0093] The Z-axis power mechanism can be configured as a servo motor, hydraulic cylinder, pneumatic cylinder, etc. Considering that the Z-axis power mechanism needs to overcome the self-weight of the ladle saddle 4, the molten steel and the Z-axis moving mechanism, the Z-axis power mechanism is usually set as a hydraulic cylinder. It has a strong load capacity and more stable movement, which can better prevent the molten steel from accidentally overflowing out of the ladle when the ladle saddle 4 drives the molten steel to sway up and down along the Z-axis in a wave-like manner.

[0094] To facilitate the automatic control of the vibration stirring device, preferably, the PLC main control module can be equipped with several control buttons, each corresponding to a different refining mode outside the furnace.

[0095] For example, the PLC master control module is equipped with LF heating vibration stirring button, LF alloying vibration stirring button, LF slag making and refining vibration stirring button and LF wire feeding and refining vibration stirring button. Different control buttons correspond to different vibration frequencies and vibration times in order to meet different ladle refining requirements such as LF heating, LF alloying, LF slag making and refining and LF wire feeding and refining.

[0096] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0097] The above provides a detailed description of the vibration-stirred steel refining method and the ladle car vibration-stirring device provided by this invention. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A method of refining molten steel by oscillation stirring, characterized by, include: Control the ladle car to move back and forth along the transfer track (01) so as to drive the molten steel in the ladle to oscillate back and forth along the Y-axis direction, and control the ladle saddle (4) of the ladle car to move back and forth relative to the frame (1) so as to drive the molten steel to oscillate back and forth along the X-axis direction; And / or control the ladle car to rotate around the Z-axis so as to drive the molten steel to rotate and oscillate around the Z-axis.

2. The method of claim 1, wherein the molten steel is stirred by the vibration. The traveling mechanism of the ladle car causes the ladle car to reciprocate along the transfer track (01), including: Input the preset Y-axis travel and preset Y-axis movement frequency of the ladle car into the control device; The traveling mechanism is controlled to reciprocate within the preset Y-axis travel frequency.

3. The method of claim 1, wherein the molten steel is stirred by the vibration. The control of the ladle saddle (4) of the ladle car to reciprocate relative to the frame (1) includes: Input the preset X-axis stroke and preset X-axis movement frequency of the ladle saddle (4) into the control device; The steel ladle saddle (4) is controlled to reciprocate within the preset X-axis travel frequency at the preset X-axis movement frequency.

4. The method for refining molten steel by vibration stirring according to claim 1, characterized in that, The control of the ladle car to rotate around the Z-axis includes: Input the preset rotation frequency of the ladle saddle (4) into the control device; Control the steel ladle saddle (4) to rotate around the Z-axis at the preset rotation frequency.

5. The method for refining molten steel by vibration stirring according to any one of claims 1-4, characterized in that, It also includes controlling the ladle car to reciprocate along the Z-axis so as to drive the molten steel to oscillate up and down along the Z-axis.

6. The method for refining molten steel by vibration stirring according to claim 5, characterized in that, The control of the ladle car to reciprocate along the Z-axis includes: Input the preset Z-axis stroke and preset Z-axis movement frequency of the ladle car into the control device; The ladle car is controlled to reciprocate within the preset Z-axis travel frequency.

7. A vibrating mixing device for a ladle car, characterized in that, The method for refining molten steel by vibration stirring according to any one of claims 1-6 includes a frame (1), the top of the frame (1) is provided with a ladle saddle (4) for mounting and clamping a ladle, and the bottom of the frame (1) is provided with a traveling mechanism, which is connected to a traveling power mechanism to drive the traveling mechanism to move along a transfer track (01) on the workshop floor. An X-axis moving mechanism is provided between the vehicle frame (1) and the steel saddle (4). The X-axis moving mechanism is connected to the X-axis power mechanism so as to drive the X-axis power mechanism to move relative to the vehicle frame (1) along the X-axis. And / or the bottom of the transfer track (01) is provided with a rotary mechanism, which is connected to a rotary power mechanism to drive the transfer track (01) to rotate around the Z-axis; The walking power mechanism, the X-axis moving mechanism, and the rotary power mechanism are all signal-connected to the control device.

8. The ladle car vibration mixing device according to claim 7, characterized in that, It also includes a Z-axis moving mechanism disposed between the frame (1) and the steel saddle (4), the Z-axis moving mechanism being connected to the Z-axis power mechanism so as to drive the Z-axis power mechanism to move relative to the frame (1) along the Z-axis.

9. The ladle car vibrating agitator according to claim 7 or 8, characterized in that, The control device includes a PLC master control module and several external drivers. The PLC master control module is connected to the external drivers via signals. The traveling power mechanism, the X-axis power mechanism, and the rotary power mechanism are all configured to correspond one-to-one with the external drivers.

10. The ladle car vibration mixing device according to claim 9, characterized in that, The PLC master control module is equipped with several control buttons, each of which corresponds to a different refining mode in the ladle refining process.

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