Hot metal transfer ladle and operation method therefor

Abstract

A hot metal transfer ladle, comprising a first liquid level meter (14) and a second liquid level meter (15) each provided with a movable electrode probe (19). The lowest liquid level contact position of the electrode probe (19) of the first liquid level meter (14) corresponds to the highest liquid level in the ladle. The lowest liquid level contact position of the electrode probe (19) of the second liquid level meter (15) corresponds to the lowest liquid level in the ladle. The first liquid level meter (14) and a feeding control valve (101) are controlled by a control device (17) in an interlocking manner, and the second liquid level meter (15) and a discharging control valve (102) are controlled by the control device (17) in an interlocking manner. When the liquid level in the ladle comes into contact with the lowest liquid level contact position of the electrode probe (19) of the first liquid level meter (14), the first liquid level meter (14) is powered on, and the feeding control valve (101) is closed. When the lowest liquid level contact position of the electrode probe (19) of the second liquid level meter (15) is separated from the liquid level in the ladle, the second liquid level meter (15) is turned off, and the discharging control valve (102) is closed. Accurate quantification for hot metal collection and transfer is achieved, and the degree of automation of the ladle is improved while higher precision and efficiency are achieved. Also provided is an operation method for the hot metal transfer ladle.

Description

Hot metal transfer ladle and operation method Technical Field

[0001] The present invention relates to the technical field of hot metal smelting, and in particular to a hot metal transfer ladle and an operation method thereof. Background Art

[0002] In the metallurgical industry, hot metal transfer devices are required in processes such as steel smelting, aluminum electrolysis, magnesium electrolysis, and alloy production. Ladles, as hot metal transfer devices, have been relatively maturely applied in the metallurgical industry. With the continuous expansion of the market, the process equipment of production enterprises also needs to continuously pursue high efficiency and high quality. New automated equipment will inevitably replace traditional equipment.

[0003] Currently, the automation level of ladle systems is low, and the collection and transfer of hot metal often requires manual intervention. To monitor the ladle's liquid level, workers install an external observation level gauge. By observing the liquid level in the gauge, workers manually open and close the inlet and outlet valves, resulting in limited accuracy and low efficiency. Furthermore, existing ladle systems cannot control internal temperature. To prevent the hot metal from solidifying due to temperature drops, transfer distances and times must be limited, resulting in low production efficiency. Therefore, current ladle systems still need improvement to meet the demands of high-quality and efficient production.

[0004] Summary of the Invention

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a hot metal transfer ladle and an operating method. By setting a first liquid level gauge and a second liquid level gauge, accurate quantitative collection and transfer of hot metal is achieved, and the automation level of the ladle is improved. By setting a heating device, the ladle can also be heated during the transfer process, ensuring the stability of the internal temperature of the ladle, extending the transfer distance and transfer time, increasing production efficiency, and meeting the needs of high-quality and high-efficiency production.

[0006] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0007] According to a first aspect of the present invention, a hot metal transfer ladle is provided, comprising a first liquid level gauge and a second liquid level gauge, the liquid level gauge having movable electrode probes, the lowest liquid level contact position of the electrode probe of the first liquid level gauge corresponding to the highest liquid level in the ladle, the lowest liquid level contact position of the electrode probe of the second liquid level gauge corresponding to the lowest liquid level in the ladle, the first liquid level gauge, the second liquid level gauge, and the feed control valve and the discharge control valve are interlocked and controlled by a control device, the first liquid level gauge and the second liquid level gauge are also connected to a power supply device, when the liquid level in the ladle contacts the lowest liquid level contact position of the electrode probe of the first liquid level gauge, the first liquid level gauge is energized and the feed control valve is closed, when the lowest liquid level contact position of the electrode probe of the second liquid level gauge in the ladle is separated from the liquid surface, the second liquid level gauge loses power and the discharge control valve is closed.

[0008] By setting the first liquid level gauge and the second liquid level gauge, accurate quantitative collection and transfer of hot metal can be achieved. When the liquid level in the ladle reaches the highest liquid level in the lifting ladle, the liquid level contacts the lowest liquid level contact position of the first liquid level gauge, and the control device closes the feed control valve. When the liquid level in the ladle reaches the lowest liquid level in the lifting ladle, the liquid level contacts the lowest liquid level contact position of the second liquid level gauge, and the control device closes the discharge control valve, thereby improving the automation level of the lifting ladle while achieving higher accuracy and efficiency.

[0009] In one embodiment, the hot metal transfer ladle further comprises a heating device, which is arranged on the outer wall of the ladle.

[0010] In one embodiment, the heating temperature of the heating device is 25-1200°C.

[0011] By setting up a heating device, the ladle can be heated during the transfer process to ensure the stability of the internal temperature of the ladle, extend the transfer distance and transfer time, increase production efficiency, and meet the needs of high-quality and efficient production.

[0012] In one embodiment, the hot metal transfer ladle further includes a heating sleeve, which is sleeved on the outer walls of the feed pipe and the discharge pipe.

[0013] By arranging the heating sleeve on the outer wall of the feed pipe and the discharge pipe, the hot metal passing through the feed pipe and the discharge pipe is kept at a high temperature, avoiding cooling and solidification, and extending the transfer distance.

[0014] In one embodiment, there are two feed pipes, namely an overflow feed pipe and a press-in feed pipe. The overflow feed pipe is used for overflow feeding when the ladle position is lower than the material taking point, and the press-in feed pipe is used for vacuum feeding when the ladle position is higher than the material taking point.

[0015] The ladle can be fed by overflow or vacuum, and the two feeding pipes serve as backup for each other. The overflow or vacuum transfer method is selected according to the position relationship between the ladle and the material collection point, which expands the application range of the ladle.

[0016] In one embodiment, there are multiple discharge pipes, and the lowest liquid surface contact positions of the multiple discharge pipes correspond to the required discharge liquid levels respectively.

[0017] By setting up several transfer pipes and the lowest liquid surface contact positions of several discharge pipes corresponding to the required discharge liquid levels, the ladle can achieve layered discharge and discharge hot metal at the required discharge liquid level, breaking through the limitation that the discharge pipes of existing ladle can only discharge from the bottom layer.

[0018] In one embodiment, the power supply device is two 24V independent power supplies, the negative poles of the two 24V independent power supplies are connected to the body of the ladle, and the positive poles are connected to the first liquid level gauge and the second liquid level gauge respectively; when the liquid level in the ladle contacts the lowest liquid level contact position of the first liquid level gauge electrode probe, a first liquid level gauge circuit is formed, and when the liquid level contacts the lowest liquid level contact position of the second liquid level gauge electrode probe, a second liquid level gauge circuit is formed; the first liquid level gauge circuit and the second liquid level gauge circuit are also provided with switches K1 and K2, respectively.

[0019] By setting up the first liquid level meter circuit and the second liquid level meter circuit, the information of the lowest liquid level contact position of the electrode probe and the liquid level in the lifting bag is converted into an electrical signal for circuit power on or off and transmitted to the control device.

[0020] In one embodiment, the power supply device is a 24V independent power supply, the negative electrode of the 24V independent power supply is connected to the bag body of the ladle, and the positive electrode is also connected to the first liquid level gauge and the second liquid level gauge through switches K1 and K2 respectively;

[0021] When K1 is closed and the liquid level in the ladle contacts the lowest liquid level contact position of the first liquid level gauge electrode probe, a first liquid level gauge circuit is formed. When K2 is closed and the liquid level in the ladle contacts the lowest liquid level contact position of the second liquid level gauge electrode probe, a second liquid level gauge circuit is formed.

[0022] By setting up the first liquid level gauge circuit and the second liquid level gauge circuit, the information of whether the lowest liquid level contact position of the electrode probe is in contact or separation with the liquid level in the lifting bag is converted into an electrical signal for powering on or off the circuit and transmitted to the control device. Only one independent power supply is used, which simplifies the circuit structure.

[0023] In one embodiment, a protective device is provided on the side wall of the electrode probe, and the protective device is used to isolate the side wall of the electrode probe from contact with the cooled lava in the ladle; the protective device is a ceramic cladding or a bellows.

[0024] Since the electrode probe is passed into the ladle, which contains hot metal, cooled and solidified chloride molten salt will adhere to the electrode probe of the liquid level gauge and cause corrosion. By providing a protective device on the side wall of the electrode probe, the contact area between the side wall of the electrode probe and the cooled lava in the ladle is reduced, thereby reducing corrosion.

[0025] In one embodiment, the electrode probe is connected to an electric heating device, which is used to heat the electrode probe to prevent the cooled lava from adhering to the surface of the electrode probe.

[0026] By arranging an electric heating device connected to the electrode probe, the outer wall of the electrode probe is prevented from adhering to the cooled and solidified chloride molten salt, thereby reducing corrosion.

[0027] In one embodiment, the hot metal transfer ladle further includes a pressure gauge and a negative pressure device, wherein the pressure gauge is used to display the pressure inside the hot metal transfer ladle, and the negative pressure device is used to create a negative pressure environment inside the hot metal transfer ladle, wherein the negative pressure device is configured to control the pressure inside the hot metal transfer ladle within a range of 0.01 MPa to 10 MPa.

[0028] In one embodiment, the negative pressure device comprises a vacuum pump or an ejector.

[0029] In one embodiment, the hot metal transfer ladle further comprises a thermocouple for monitoring the temperature inside the hot metal transfer ladle.

[0030] In one embodiment, the pressure gauge, the negative pressure device and the thermocouple are connected to the control device, so that the control device can obtain pressure and temperature information in the hot metal transfer ladle.

[0031] According to a second aspect of the present invention, a method for operating a hot metal transfer ladle is provided, which uses the hot metal transfer ladle according to the first aspect of the present invention, and the operating method comprises the following steps:

[0032] S01: Blow argon into the ladle through the feed pipe. When the ladle is filled with argon, close the feed control valve and set the lowest liquid level contact position of the electrode probe of the first liquid level gauge to correspond to the highest liquid level in the ladle. Set the lowest liquid level contact position of the electrode probe of the second liquid level gauge to correspond to the lowest liquid level in the ladle.

[0033] S02: One end of the first liquid level gauge is connected to the power supply device, connected to the control device, and feed monitoring is started;

[0034] S03: Open the feed control valve. When the liquid level in the ladle reaches the lowest liquid level contact position of the electrode probe of the first liquid level gauge, the first liquid level gauge is energized and the signal is transmitted to the control device, which closes the feed control valve.

[0035] S04: The bag is moved to the discharge position, and the discharge pipe is connected to the receiving equipment;

[0036] S05: One end of the second liquid level gauge is connected to the power supply device, and the control device is connected to start the discharge monitoring. At this time, the second liquid level gauge is powered;

[0037] S06: Discharging. When the liquid level in the package separates from the lowest liquid level contact position of the electrode probe of the second liquid level gauge, the second liquid level gauge loses power, and the signal is transmitted to the control device, which closes the discharge control valve.

[0038] By setting the operation method of the hot metal transfer ladle, the feeding or discharging will be automatically stopped when the set liquid level in the ladle is reached, thus achieving accurate quantitative feeding or discharging of hot metal, improving the automation level of the ladle while achieving higher accuracy and efficiency, meeting the needs of high-quality and efficient production.

[0039] The beneficial effects of the present invention are:

[0040] A hot metal transfer ladle of the present invention realizes precise quantitative collection and transfer of hot metal by arranging a first liquid level gauge and a second liquid level gauge. When the liquid level in the ladle reaches the highest liquid level in the ladle, the liquid level contacts the lowest liquid level contact position of the first liquid level gauge, and the control device closes the feed control valve. When the liquid level in the ladle reaches the lowest liquid level in the ladle, the liquid level contacts the lowest liquid level contact position of the second liquid level gauge, and the control device closes the discharge control valve, thereby improving the automation level of the ladle and achieving higher accuracy and efficiency.

[0041] By installing a heating device, the ladle can be heated during the transfer process, ensuring a stable internal temperature, extending the transfer distance and time, increasing production efficiency, and meeting the needs of high-quality and high-efficiency production. By installing heating sleeves on the outer walls of the feed and discharge pipes, the hot metal passing through the feed and discharge pipes is kept at a high temperature, preventing cooling and solidification, and further extending the transfer distance.

[0042] The ladle can be fed by overflow or vacuum, and the two feeding pipes serve as backup for each other. The overflow or vacuum transfer method is selected according to the position relationship between the ladle and the material collection point, which expands the application range of the ladle.

[0043] By setting up several transfer pipes and the lowest liquid surface contact positions of several discharge pipes corresponding to the required discharge liquid levels, the ladle can achieve layered discharge and discharge hot metal at the required discharge liquid level, breaking through the limitation that the discharge pipes of existing ladle can only discharge from the bottom layer.

[0044] By providing a protective device on the side wall of the electrode probe, the contact area between the side wall of the electrode probe and the cooling ladle ladle is reduced, thus reducing corrosion. By providing an electric heating device connected to the electrode probe, the outer wall of the electrode probe is prevented from adhering to the cooled and solidified chloride molten salt, thus reducing corrosion.

[0045] The present invention also provides an operating method for a hot metal transfer ladle. By setting the operating method for the hot metal transfer ladle, feeding or discharging can be automatically stopped when the set liquid level in the ladle is reached, thereby achieving precise quantitative feeding or discharging of hot metal, improving the automation level of the ladle while achieving higher accuracy and efficiency, and meeting the production needs of high quality and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] FIG1 is a schematic structural diagram of a hot metal transfer ladle according to embodiment 1 of the present invention;

[0047] FIG2 is a top view of a hot metal transfer ladle according to embodiment 1 of the present invention;

[0048] FIG3 is a schematic structural diagram of a hot metal transfer ladle according to embodiment 2 of the present invention;

[0049] FIG4 is a top view of a hot metal transfer ladle according to embodiment 2 of the present invention;

[0050] FIG5 is a schematic structural diagram of a hot metal transfer ladle according to embodiment 3 of the present invention;

[0051] FIG6 is a top view of a hot metal transfer ladle according to embodiment 3 of the present invention;

[0052] FIG7 is a schematic diagram of a level gauge circuit of a hot metal transfer ladle according to Example 4 of the present invention;

[0053] FIG8 is a schematic diagram of a level gauge circuit of a hot metal transfer ladle according to Example 5 of the present invention;

[0054] FIG9 is a schematic structural diagram of a ceramic-coated liquid level gauge of Example 6 of a hot metal transfer ladle of the present invention;

[0055] FIG10 is a schematic structural diagram of a bellows-type liquid level gauge of Example 7 of a hot metal transfer ladle of the present invention;

[0056] FIG11 is a schematic structural diagram of a double-flange level gauge of Example 8 of a hot metal transfer ladle of the present invention.

[0057] In the figure: 1. cladding body; 2. cladding cover; 3. sealing gasket; 4. heating device; 5. skin; 6. press-in feed pipe; 7. overflow feed pipe; 8. discharge pipe; 9. thermocouple; 101. feed control valve; 102. discharge control valve; 11. ejector; 12. vacuum pump; 13. pressure gauge; 14. first liquid level gauge; 15. second liquid level gauge; 16. liquid level indicator; 17. control device; 18. mobile lifting vehicle; 19. electrode probe; 20. flange; 21. ceramic cladding; 22. bellows; 23. upper flange; 24. lower flange; 25. sealing ring; 26. electric heating device; 27. heating sleeve. DETAILED DESCRIPTION

[0058] To better explain the present invention and facilitate understanding, the present invention is described in detail below with reference to the accompanying drawings and through specific embodiments. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0059] As shown in Figures 1-11, according to a first aspect of the present invention, a hot metal transfer ladle is provided, comprising a first liquid level gauge 14 and a second liquid level gauge 15. The liquid level gauges have movable electrode probes 19. The lowest liquid level contact position of the electrode probe 19 of the first liquid level gauge 14 corresponds to the highest liquid level in the ladle, and the lowest liquid level contact position of the electrode probe 19 of the second liquid level gauge 15 corresponds to the lowest liquid level in the ladle. The first liquid level gauge 14, the second liquid level gauge 15, and the feed control valve 101 and the discharge control valve 102 are interlocked and controlled by a control device 17. The first liquid level gauge 14 and the second liquid level gauge 15 are also connected to a power supply device. When the liquid level in the ladle contacts the lowest liquid level contact position of the electrode probe 19 of the first liquid level gauge 14, the first liquid level gauge 14 is energized and the feed control valve 101 is closed. When the lowest liquid level contact position of the electrode probe 19 of the second liquid level gauge 15 in the ladle is separated from the liquid surface, the second liquid level gauge 15 loses power and the discharge control valve 102 is closed.

[0060] By setting the first liquid level gauge 14 and the second liquid level gauge 15, accurate quantitative collection and transfer of hot metal is achieved. When the liquid level in the ladle 1 reaches the highest liquid level in the ladle, the liquid level contacts the lowest liquid level contact position of the first liquid level gauge 14, and the control device 17 closes the feed control valve 101. When the liquid level in the ladle 1 reaches the lowest liquid level in the ladle, the liquid level contacts the lowest liquid level contact position of the second liquid level gauge 15, and the control device 17 closes the discharge control valve 102, thereby improving the automation level of the ladle and achieving higher accuracy and efficiency.

[0061] A PLC controller is configured in the control device 17, and interlocking control is implemented through the PLC controller. The specific implementation method adopted by the PLC controller according to the above description is the existing technology and will not be described in detail here.

[0062] The outer side of the heating device 4 on the outer wall of the bag body 1 is also wrapped with a skin 5 to ensure the electrical safety of the bag.

[0063] By setting the first liquid level gauge 14 and the second liquid level gauge 15, accurate quantitative collection and transfer of hot metal is achieved. When the liquid level in the ladle 1 reaches the highest liquid level in the ladle, the liquid level contacts the lowest liquid level contact position of the first liquid level gauge 14, and the control device 17 closes the feed control valve 101. When the liquid level in the ladle 1 reaches the lowest liquid level in the ladle, the liquid level contacts the lowest liquid level contact position of the second liquid level gauge 15, and the control device 17 closes the discharge control valve 102, thereby improving the automation level of the ladle and achieving higher accuracy and efficiency.

[0064] In one embodiment, the hot metal transfer ladle of the present invention further comprises a heating device 4, which is arranged on the outer wall of the ladle body 1. The heating temperature is 25-1200°C.

[0065] By providing the heating device 4, the ladle can also be heated during the transfer process, ensuring the internal temperature of the ladle to be stable, extending the transfer distance and transfer time, increasing production efficiency, and meeting the high-quality and high-efficiency production needs.

[0066] In one embodiment, the hot metal transfer ladle of the present invention further includes a heating sleeve 27 , which is sleeved on the outer walls of the feed pipe and the discharge pipe 8 .

[0067] By arranging the heating sleeve 27 on the outer wall of the feed pipe and the discharge pipe 8, the hot metal passing through the feed pipe and the discharge pipe 8 is kept at a high temperature, avoiding cooling and solidification, thereby extending the transfer distance.

[0068] In one embodiment, there are two feeding pipes, namely an overflow feeding pipe 7 and a pressure feeding pipe 6. The overflow feeding pipe 7 is used for overflow feeding when the ladle position is lower than the material taking point, and the pressure feeding pipe 6 is used for vacuum feeding when the ladle position is higher than the material taking point.

[0069] The ladle can be fed by overflow or vacuum, with two feed pipes acting as backup for each other. The overflow or vacuum transfer method can be selected based on the positional relationship between the ladle and the material collection point, expanding the ladle's application range. The specific structure of the overflow feed pipe 7 and the push-in feed pipe 6, as well as the connection method of the collection end, are common knowledge in the art.

[0070] In one embodiment, there are several discharge pipes 8, and the lowest liquid surface contact positions of the several discharge pipes 8 correspond to the required discharge liquid levels respectively.

[0071] By setting up several discharge pipes 8, the lowest liquid surface contact positions of the several discharge pipes 8 respectively correspond to the required discharge liquid levels, so that the ladle can achieve layered discharge and can discharge hot metal at the required discharge liquid level, breaking through the limitation that the discharge pipes 8 of the existing ladle can only discharge from the bottom layer.

[0072] Referring to Figure 7, in one embodiment, the power supply device is two 24V independent power supplies, the negative poles of the two 24V independent power supplies are connected to the ladle body 1 of the ladle, and the positive poles are connected to the first liquid level gauge 14 and the second liquid level gauge 15 respectively; when the liquid level in the ladle contacts the lowest liquid level contact position of the electrode probe 19 of the first liquid level gauge 14, a first liquid level gauge 14 circuit is formed, and when the liquid level contacts the lowest liquid level contact position of the electrode probe 19 of the second liquid level gauge 15, a second liquid level gauge 15 circuit is formed; the first liquid level gauge circuit and the second liquid level gauge circuit are also provided with switches K1 and K2, respectively.

[0073] By setting up the first liquid level meter circuit and the second liquid level meter circuit, the information of the lowest liquid level contact position of the electrode probe 19 contacting or separating with the liquid level in the ladle is converted into an electrical signal for powering on or off the circuit and transmitted to the control device 17.

[0074] Referring to FIG8 , in one embodiment, the power supply device is a 24V independent power supply, the negative electrode of the 24V independent power supply is connected to the ladle body 1 of the ladle, and the positive electrode is connected to the first liquid level gauge 14 and the second liquid level gauge 15 through switches K1 and K2 respectively;

[0075] When K1 is closed and the liquid level in the ladle contacts the lowest liquid level contact position of the electrode probe 19 of the first liquid level gauge 14, the first liquid level gauge 14 circuit is formed. When K2 is closed and the liquid level in the ladle contacts the lowest liquid level contact position of the electrode probe 19 of the second liquid level gauge 15, the second liquid level gauge circuit is formed.

[0076] By setting up the first liquid level meter circuit and the second liquid level meter circuit, the information of whether the lowest liquid level contact position of the electrode probe 19 is in contact with or separated from the liquid level in the ladle is converted into an electrical signal for powering on or off the circuit and transmitted to the control device 17. Only one independent power supply is used, which simplifies the circuit structure.

[0077] 9 and 10 , in one embodiment, the side wall of the electrode probe 19 is provided with a protective device for isolating the side wall of the electrode probe 19 from contact with the cooled lava in the ladle; the protective device is a ceramic cladding 21 ( FIG. 9 ) or a bellows 22 ( FIG. 10 ).

[0078] Since the electrode probe 19 passes into the ladle 1, which contains hot metal, cooled and solidified chloride lava will adhere to the level gauge electrode probe 19 and cause corrosion. By providing a protective device on the side wall of the electrode probe 19, the contact area between the side wall of the electrode probe 19 and the cooled ladle is reduced, thereby reducing corrosion.

[0079] Referring to FIG. 11 , in one embodiment, the electrode probe 19 is connected to an electric heating device 26 , and the electric heating device 26 is used to heat the electrode probe 19 to prevent the cooled lava from adhering to the surface of the electrode probe 19 .

[0080] By providing the electric heating device 26 connected to the electrode probe 19, the outer wall of the electrode probe 19 is prevented from adhering to the cooled and solidified chloride lava, thereby reducing corrosion.

[0081] Referring to Figures 1-6, in one embodiment, the hot metal transfer ladle of the present invention further includes a pressure gauge 13 and a negative pressure device. The pressure gauge 13 is used to display the pressure within the hot metal transfer ladle, and the negative pressure device is used to create a negative pressure environment within the hot metal transfer ladle. By providing the pressure gauge 13 and the negative pressure device, the pressure within the ladle is monitored and controlled. The negative pressure device is configured to control the pressure within the ladle within a range of 0.01 MPa to 10 MPa. The negative pressure device includes a vacuum pump 12 (Figures 3 and 5) or an ejector 11 (Figure 1), etc.

[0082] 1 , 3 and 5 , in one embodiment, the hot metal transfer ladle of the present invention further includes a thermocouple 9 , which is used to monitor the temperature inside the ladle.

[0083] The pressure gauge 13, the negative pressure device and the thermocouple 9 are also connected to the control device 17, so that the control device 17 can obtain the pressure and temperature information in the ladle.

[0084] In one embodiment, the feed pipes 6, 7, the discharge pipe 8 and the liquid level gauges 14, 15 are connected to the cover 2 by bolts via flanges 20 (Figures 9-11), making it easy to repair the pipelines in case of failure.

[0085] In one embodiment, a sealing gasket 3 is provided between the bag body 1 and the bag cover 2, and the connection between the bag cover 2 and the interior of the bag body 1 is sealed. The provision of the sealing gasket 3 ensures the sealing effect of the lifting bag at high temperatures, and the sealed connection stabilizes the pressure in the bag body 1.

[0086] In one embodiment, the ladle is placed on a mobile lift 18 to facilitate quick and easy transfer.

[0087] According to a second aspect of the present invention, a method for operating a hot metal transfer ladle is provided, which uses the hot metal transfer ladle according to the first aspect of the present invention, and the operating method comprises the following steps:

[0088] S01: Blow argon into the ladle through the feed pipe. When the ladle is filled with argon, close the feed control valve 101, set the lowest liquid level contact position of the electrode probe 19 of the first liquid level gauge 14 to correspond to the highest liquid level in the ladle, and set the lowest liquid level contact position of the electrode probe 19 of the second liquid level gauge 15 to correspond to the lowest liquid level in the ladle;

[0089] S02: One end of the first liquid level gauge 14 is connected to the power supply device and connected to the control device 17 to start feeding monitoring;

[0090] S03: Open the feed control valve 101. When the liquid level in the package 1 reaches the lowest liquid level contact position of the electrode probe 19 of the first liquid level gauge 14, the first liquid level gauge 14 is powered and the signal is transmitted to the control device 17. The control device 17 closes the feed control valve 101.

[0091] S04: The bag is moved to the discharge position, and the discharge pipe 8 is connected to the receiving device;

[0092] S05: One end of the second liquid level gauge 15 is connected to the power supply device, and the control device 17 is connected to start the discharge monitoring. At this time, the second liquid level gauge 15 is powered;

[0093] S06: Discharging. When the liquid level in the package 1 separates from the lowest liquid level contact position of the electrode probe 19 of the second liquid level gauge 15, the second liquid level gauge 15 loses power, and the signal is transmitted to the control device 17, which closes the discharge control valve 102.

[0094] By setting the operation method of the hot metal transfer ladle, the feeding or discharging will be automatically stopped when the set liquid level in the ladle is reached, thus achieving accurate quantitative feeding or discharging of hot metal, improving the automation level of the ladle while achieving higher accuracy and efficiency, meeting the needs of high-quality and efficient production.

[0095] Example 1:

[0096] 1 and 2 , a hot metal transfer ladle of Example 1 includes a ladle body 1, a ladle cover 2, a sealing gasket 3, a heating device 4, a skin 5, a press-in feed pipe 6, an overflow feed pipe 7, a transfer pipe 8, a thermocouple 9, a feed control valve 101, a discharge control valve 102, a negative pressure device, a pressure gauge 13, a first liquid level gauge 14, a second liquid level gauge 15, a control device 17, a mobile lifting vehicle 18, an electrode probe 19, a flange 20, and a heating sleeve 27.

[0097] The first and second liquid level gauges 14, 15 each have movable electrode probes 19. The lowest contact point of the electrode probe 19 of the first liquid level gauge 14 corresponds to the highest liquid level in the ladle, while the lowest contact point of the electrode probe 19 of the second liquid level gauge 15 corresponds to the lowest liquid level in the ladle. The first and second liquid level gauges 14, 15 are interlocked with the feed control valve 101 and the discharge control valve 102 via a control device 17. The first and second liquid level gauges 14, 15 are also connected to a power supply. When the liquid level in the ladle contacts the lowest contact point of the electrode probe 19 of the first liquid level gauge 14, the first liquid level gauge 14 receives power, closing the feed control valve 101. When the lowest contact point of the electrode probe 19 of the second liquid level gauge 15 separates from the liquid surface, the second liquid level gauge 15 loses power, closing the discharge control valve 102. A PLC controller is configured within the control device 17, which implements interlocking control. The maximum liquid level is set to 1500kg (capacity adjustable), and the minimum liquid level is set to 500kg (capacity adjustable).

[0098] The heating device 4 is installed on the outer wall of the ladle body 1, with a heating temperature of 25-1200°C. The outer side of the heating device 4 is wrapped with a skin 5. The heating sleeve 27 is installed on the outer wall of the feed pipe and the discharge pipe 8.

[0099] The pressure gauge 13 is used to display the pressure within the ladle, and the negative pressure device is used to create a negative pressure environment within the ladle. By installing the pressure gauge 13 and the negative pressure device, the pressure within the ladle is monitored and controlled, keeping the operating pressure within the ladle within the range of 0.01 MPa to 10 MPa. The negative pressure device is an ejector 11.

[0100] The thermocouple 9 is used to monitor the temperature inside the ladle.

[0101] The pressure gauge 13, the negative pressure device and the thermocouple 9 are also connected to the control device 17, so that the control device 17 can obtain the pressure and temperature information in the ladle.

[0102] The feed pipe, the discharge pipe 8 and the liquid level gauge are connected to the cover 2 by flange bolts, which makes it convenient to repair the pipeline in case of failure.

[0103] In one embodiment, a sealing gasket 3 is provided between the bag body 1 and the bag cover 2, and the connection between the bag cover and the interior of the bag is sealed. The provision of the sealing gasket 3 ensures the sealing effect of the bag under high temperature, and the sealing connection stabilizes the pressure in the bag body 2.

[0104] In one embodiment, the ladle is placed on a mobile lift 18 to facilitate quick and easy transfer.

[0105] Example 2:

[0106] 3 and 4 , the hot metal transfer ladle described in Example 2 is substantially the same as that described in Example 1, except that the negative pressure device uses a vacuum pump 12 .

[0107] Example 3:

[0108] Referring to Figures 5 and 6, Example 3 is substantially identical to the hot metal transfer ladle described in Example 2, differing in that two discharge pipes 8 are provided. The lowest liquid level contact positions of the two discharge pipes 8 correspond to the desired discharge liquid levels. By providing two discharge pipes 8, each with its lowest liquid level contact positions corresponding to the desired discharge liquid levels, the ladle achieves layered discharge, capable of discharging hot metal at the desired discharge level, thus overcoming the limitation of existing ladle discharge pipes that only discharge from the bottom layer.

[0109] Example 4:

[0110] 7 , this embodiment provides a method for connecting a level gauge for a hot metal transfer ladle, wherein two 24V independent power supplies are provided, the negative poles of the two 24V independent power supplies are connected to the ladle body 1 of the ladle, and the positive poles are connected to the first level gauge 14 and the second level gauge 15, respectively; when the liquid level in the ladle contacts the lowest liquid level contact position of the electrode probe 19 of the first level gauge 14, a first level gauge circuit is formed; when the liquid level contacts the lowest liquid level contact position of the electrode probe 19 of the second level gauge 15, a second level gauge circuit is formed; the first level gauge circuit and the second level gauge circuit are further provided with switches K1 and K2, respectively, and the level gauges are provided with a level indicator 16.

[0111] By providing a first and second liquid level gauge circuit, information indicating whether the lowest liquid level contact position of the electrode probe 19 is in contact or separated from the liquid surface in the ladle is converted into an electrical signal that energizes or de-energizes the circuit and transmits it to the control device 17. The first liquid level gauge switches its detection state on and off via switch K1, while the second liquid level gauge switches its detection state on and off via switch K2.

[0112] Close K1 and start the feeding monitoring of the first liquid level gauge 14. When the liquid level in the ladle contacts the lowest liquid level contact position of the electrode probe 19 of the first liquid level gauge 14, the first liquid level gauge 14 is energized. The first liquid level gauge 14 is energized and the signal is transmitted to the control device 17. The control device 17 closes the feeding control valve.

[0113] Close K2 and start the transfer monitoring of the second liquid level gauge 15. At this time, the second liquid level gauge 15 is powered; when the liquid level in the ladle is separated from the lowest liquid surface contact position of the electrode probe 19 of the second liquid level gauge 15, the second liquid level gauge 15 loses power and the signal is transmitted to the control device 17. The control device 17 closes the discharge control valve 102.

[0114] Example 5:

[0115] Referring to Figure 8 , this embodiment provides a connection method for a liquid level measurement system for a hot metal transfer ladle. This method is essentially the same as that of Example 4, except that only a single 24V independent power supply is provided. The negative terminal of the 24V independent power supply is connected to the ladle body 1, and the positive terminal is also connected to the first liquid level gauge 14 and the second liquid level gauge 15 via switches K1 and K2, respectively. The use of only a single independent power supply simplifies the circuit configuration.

[0116] Example 6:

[0117] Referring to Figure 9, this embodiment provides a liquid level gauge for a hot metal transfer ladle, and the liquid level gauge is of a ceramic-clad type. The liquid level gauge is connected to the ladle cover 2 via a flange 20. The side wall of the electrode probe 19 of the liquid level gauge is provided with a protective device, which is a ceramic cladding 21. The electrode probe 19 and the flange 20 are fixed to the flange 20 by fusion welding. At the same time, a ceramic layer is coated on the portion below the flange 20 by brazing to form a ceramic cladding 21 to ensure the conductive accuracy of the needle tip. By providing the ceramic cladding 21 on the side wall of the electrode probe 19, the contact area between the side wall of the electrode probe 19 and the cooling lava in the ladle is reduced, thereby reducing corrosion. In addition, the ceramic-clad liquid level gauge is connected to the ladle cover 2 via a bolt connection of the flange 20.

[0118] Example 7:

[0119] Referring to Figure 10, this embodiment provides a level gauge for a hot metal transfer ladle, and the level gauge is a bellows type. The bellows type level gauge uses a bellows 22 to achieve up and down movement of the level gauge, and the working position of the level gauge can be set according to work needs. The level gauge is connected to the ladle cover 2 via a flange 20. The side wall of the electrode probe 19 of the level gauge is provided with a protective device, which is a bellows 22. An electrode probe hole is provided in the middle of the flange 20 to facilitate the up and down movement of the electrode probe 19. The electrode probe 19 below the flange 20 is provided with a bellows 22. The bellows 22 is sealed to the flange 20 by welding, and the lower end is sealed to the electrode probe 19 by welding. By providing the bellows 22 on the side wall of the electrode probe 19, the contact area between the side wall of the electrode probe 19 and the cooling ladle is reduced, thereby reducing corrosion. In addition, the bellows type level gauge is connected to the ladle cover 2 via a bolt connection to the flange 20.

[0120] Example 8:

[0121] Referring to Figure 11 , this embodiment provides a liquid level gauge for a hot metal transfer ladle. The liquid level gauge is a double-flange type. The double-flange connection structure includes an electric heater 26, an upper flange 23, a lower flange 24, and a flange 20 connected to the ladle cover 2. Sealing rings 25 are provided on the side walls of the electrode probe 19 between the upper flange 23 and the lower flange 24, and between the flange 20 connected to the ladle cover 2 and the ladle cover 2. The electrode probe 19 passes through the two sealing rings 25, ensuring a good seal and allowing the position of the electrode probe 19 to be flexibly adjusted as needed. Furthermore, an electric heater 26 is provided between the flange 20 connected to the ladle cover 2 and the lower flange 24. The electrode probe 19 is connected to the electric heater 26 and is used to heat the electrode probe 19 to prevent cooling lava from adhering to its surface. This prevents the outer wall of the electrode probe 19 from adhering to the cooled and solidified chloride lava, ensuring that the electrode probe 19 is not affected by temperature or medium solidification during operation, thereby reducing corrosion. In addition, the double-flange liquid level gauge is connected to the cover 2 via the flange 20 in a bolted connection manner.

[0122] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A hot metal transfer ladle, characterized in that: The invention comprises a first liquid level meter (14) and a second liquid level meter (15), wherein the liquid level meter has a movable electrode probe (19), wherein the lowest liquid level contact position of the electrode probe (19) of the first liquid level meter (14) corresponds to the highest liquid level in the ladle, and the lowest liquid level contact position of the electrode probe (19) of the second liquid level meter (15) corresponds to the lowest liquid level in the ladle, and the first liquid level meter (14) and the second liquid level meter (15) are connected to a feed control valve (101) and a discharge control valve (102). 2) Through interlocking control by the control device (17), the first liquid level gauge (14) and the second liquid level gauge (15) are also connected to the power supply device. When the liquid level in the ladle contacts the lowest liquid level contact position of the electrode probe (19) of the first liquid level gauge (14), the first liquid level gauge (14) is energized and the feed control valve (101) is closed. When the lowest liquid level contact position of the electrode probe (19) of the second liquid level gauge (15) in the ladle is separated from the liquid surface, the second liquid level gauge (15) loses power and the discharge control valve (102) is closed.

2. The hot metal transfer ladle according to claim 1, characterized in that: The hot metal transfer ladle further comprises a heating device (4), wherein the heating device (4) is arranged on the outer wall of the ladle body (1) of the ladle.

3. The hot metal transfer ladle according to claim 2, characterized in that: The heating temperature of the heating device (4) is 25-1200°C.

4. The hot metal transfer ladle according to claim 1, characterized in that: The hot metal transfer ladle further comprises a heating sleeve (27), and the heating sleeve (27) is sleeved on the outer walls of the feed pipe and the discharge pipe (8).

5. The hot metal transfer ladle according to claim 1, characterized in that: There are two feeding pipes, namely an overflow feeding pipe (7) and a pressure feeding pipe (6). The overflow feeding pipe (7) is used for overflow feeding when the ladle position is lower than the material taking point, and the pressure feeding pipe (6) is used for vacuum feeding when the ladle position is higher than the material taking point.

6. The hot metal transfer ladle according to claim 1, characterized in that: There are a plurality of discharge pipes (8), and the lowest liquid surface contact positions of the plurality of discharge pipes (8) respectively correspond to the required discharge liquid levels.

7. The hot metal transfer ladle according to claim 1, characterized in that: The power supply device comprises two 24V independent power supplies, the negative electrodes of the two 24V independent power supplies are connected to the bag body (1) of the ladle, and the positive electrodes are connected to the first liquid level gauge (14) and the second liquid level gauge (15) respectively; when the liquid level in the ladle contacts the lowest liquid level contact position of the electrode probe (19) of the first liquid level gauge (14), a first liquid level gauge circuit is formed; when the liquid level contacts the lowest liquid level contact position of the electrode probe (19) of the second liquid level gauge (15), a second liquid level gauge circuit is formed; the first liquid level gauge circuit and the second liquid level gauge circuit are also provided with switches K1 and K2 respectively.

8. The hot metal transfer ladle according to claim 1, characterized in that: The power supply device is a 24V independent power supply, the negative electrode of the 24V independent power supply is connected to the bag body (1) of the lifting bag, and the positive electrode is also connected to the first liquid level meter (14) and the second liquid level meter (15) through switches K1 and K2 respectively; When K1 is closed and the liquid level in the ladle contacts the lowest liquid level contact position of the electrode probe (19) of the first liquid level gauge (14), a first liquid level gauge circuit is formed; when K2 is closed and the liquid level in the ladle contacts the lowest liquid level contact position of the electrode probe (19) of the second liquid level gauge (14), a second liquid level gauge circuit is formed.

9. The hot metal transfer ladle according to claim 1, characterized in that: The side wall of the electrode probe (19) is provided with a protective device, which is used to separate the side wall of the electrode probe (19) from contact with the cooling lava in the ladle; the protective device is a ceramic cladding (21) or a bellows (22).

10. The hot metal transfer ladle according to claim 1, characterized in that: The electrode probe (19) is connected to an electric heating device (26), and the electric heating device is used to heat the electrode probe (19) to prevent the cooled lava from adhering to the surface of the electrode probe.

11. The hot metal transfer ladle according to claim 1, characterized in that: The hot metal transfer ladle further comprises a pressure gauge (13) and a negative pressure device, wherein the pressure gauge (13) is used to display the pressure inside the hot metal transfer ladle, and the negative pressure device is used to create a negative pressure environment inside the hot metal transfer ladle, wherein the negative pressure device is configured to control the pressure inside the hot metal transfer ladle within a range of 0.01 MPa to 10 MPa.

12. The hot metal transfer ladle according to claim 11, characterized in that: The negative pressure device comprises a vacuum pump (12) or an ejector (11).

13. The hot metal transfer ladle according to claim 12, characterized in that: The hot metal transfer ladle also includes a thermocouple (9) for monitoring the temperature inside the hot metal transfer ladle.

14. The hot metal transfer ladle according to claim 13, characterized in that: The pressure gauge (13), the negative pressure device and the thermocouple (9) are connected to the control device (17), so that the control device (17) can obtain the pressure and temperature information in the hot metal transfer ladle.

15. A method for operating a hot metal transfer ladle, using the hot metal transfer ladle according to any one of claims 1 to 14, characterized in that: The operation method comprises the following steps: S01: Blowing argon gas into the ladle through the feed pipe, when the ladle is filled with argon gas, closing the feed control valve (101), setting the lowest liquid level contact position of the electrode probe (19) of the first liquid level meter (14) to correspond to the highest liquid level in the ladle, and setting the lowest liquid level contact position of the electrode probe (19) of the second liquid level meter (15) to correspond to the lowest liquid level in the ladle; S02: one end of the first liquid level meter (14) is connected to the power supply device, connected to the control device (17), and the feed monitoring is started; S03: opening the feed control valve (101), when the liquid level in the package (1) contacts the lowest liquid level contact position of the electrode probe (19) of the first liquid level meter (14), the first liquid level meter (14) is powered, and the signal is transmitted to the control device (17), and the control device (17) closes the feed control valve (10); S04: The bag is moved to the discharge position, and the discharge pipe (8) is connected to the receiving device; S05: One end of the second liquid level meter (15) is connected to the power supply device, and the control device (17) is connected to start the discharge monitoring. At this time, the second liquid level meter (15) is powered; S06: Discharging. When the liquid level in the package (1) is separated from the lowest liquid level contact position of the electrode probe (19) of the second liquid level meter (15), the second liquid level meter (15) loses power, and a signal is transmitted to the control device (17). The control device (17) closes the discharging control valve (102).

Images