Device for feeding wire into converter in later tapping period

Abstract

The utility model discloses a device for feeding wires into a converter at the later tapping stage, which relates to the field of converter steelmaking equipment, and comprises a wire feeder, a guide rail, a wire feeding device, a wire feeding device and a wire discharging device, and is characterized in that the wire feeding device is arranged on the guide rail in a sliding manner; the pay-off machine is arranged at the end, away from the converter, of the guide rail, and a metal wire of the pay-off machine is connected with the wire inlet end of the wire feeder; the feeding pipe is connected with the guide pipe, and the discharging end of the feeding pipe and the output end of the guide pipe are arranged at the same position; according to the device, a certain amount of metal wires are fed into molten steel through the wire feeder, then a certain amount of lime and pre-melting type refining slag are added into the steel ladle through the feeding pipe, and meanwhile, deoxidizing agents such as silicon carbide are added into the steel ladle, so that the slag forming effect of top ash and top slag of the steel ladle can be accelerated; the refining slag in the steel ladle achieves the inclusion adsorption capacity in the converter tapping process, the refining slag making time can be shortened, and operation is easy.

Description

Technical Field

[0001] The utility model belongs to the field of converter steelmaking equipment, and more specifically relates to a device for feeding wire into a converter in the late stage of steel tapping. Background Art

[0002] Converter steelmaking involves blowing oxygen into the converter through an oxygen lance. This oxygen reacts with carbon and other elements in the molten iron to achieve decarburization and dephosphorization. However, converter oxygen steelmaking can increase the oxygen content of the molten steel. For aluminum-containing steels, a certain amount of high-aluminum deoxidizer is added to the ladle before tapping. The oxygen in the molten steel reacts with the aluminum to achieve deoxidation and alloying. However, when lime and pre-melted refining slag are added to the ladle, the oxygen-rich molten steel comes into direct contact with the lime and pre-melted refining slag, resulting in an increase in the oxygen content of the slag. The ladle slag with high oxygen content is not conducive to the adsorption of inclusions in the steel, which increases the difficulty of subsequent refining and slagging, prolongs the refining and slagging time, and is not conducive to controlling the cleanliness of the molten steel. Utility Model Content

[0003] The purpose of the utility model is to address the deficiencies in the prior art and provide a device for feeding wire into a converter in the later stage of steel tapping. The device feeds a certain amount of metal wire into molten steel through a wire feeder, then adds a certain amount of lime and pre-melted refined slag into the ladle through a feeding pipe, and at the same time adds deoxidizers such as silicon carbide into the ladle, which can accelerate the slagging effect of the top ash and top slag of the ladle, so that the refined slag in the ladle can achieve the ability to absorb inclusions during the converter tapping process, which is conducive to shortening the refining and slagging time, and is simple to operate.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a device for feeding wire into a converter in the late stage of steel tapping, comprising:

[0005] A wire feeding machine is slidably arranged on the guide rail, and a guide tube is provided at the wire outlet end of the wire feeding machine;

[0006] A wire pay-off machine is provided at one end of the guide rail away from the converter, and the metal wire of the wire pay-off machine is connected to the wire inlet end of the wire feeding machine;

[0007] A feeding pipe is connected to the conduit, and a discharge end of the feeding pipe and an output end of the conduit are arranged at the same position.

[0008] Optionally, the conduit is L-shaped, one end of the conduit is connected to the wire feeding machine, and the other end of the conduit is arranged downward.

[0009] Optionally, an air duct is further provided at the other end of the catheter, an air outlet of the air duct is arranged downward, and the other end of the catheter and the air outlet of the air duct are arranged in the same direction.

[0010] Optionally, the air inlet of the air duct is connected to an argon generator.

[0011] Optionally, a control unit is further included, and the control unit is control-connected to the wire feeding machine and the argon generator.

[0012] Optionally, a position sensor is provided at the other end of the conduit, and the other end of the conduit is arranged opposite to the steel outlet of the converter.

[0013] Optionally, a pulley is provided at the bottom of the wire feeding machine, and a guide groove is provided on the guide rail, and the guide groove cooperates with the pulley.

[0014] Optionally, the wire feeding machine includes a first pinch roller and a second pinch roller, the metal wire passes through the first pinch roller and the second pinch roller in sequence, and a cutter is provided between the first pinch roller and the second pinch roller.

[0015] Optionally, the pay-off machine includes a fixed column and a wire roller, the wire roller is mounted on the fixed column via a bearing sleeve, and a metal wire is wound around the outer circumference of the wire roller.

[0016] Optionally, the metal wire is an aluminum wire.

[0017] The utility model provides a device for feeding wire into a converter in the late stage of steel tapping, and its beneficial effects are as follows: the wire feeding device controls the wire feeding machine to move accurately on the guide rail through a position sensor, and when the other end of the guide tube is aligned with the steel tapping port, the wire feeding machine stops moving, and then the slag surface in the converter is blown open through the air guide pipe, and then aluminum wire is fed into the molten steel through the wire feeding machine, and finally lime and pre-melted refined slag are added through the feeding pipe to align with the steel flow, thereby accelerating the melting of auxiliary materials and reducing the oxygen content in the slag, and at the same time, deoxidizers such as silicon carbide are added to the ladle, so as to further improve the deoxidation effect of the ladle top ash and top slag.

[0018] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0020] Figure 1 The figure shows a schematic structural diagram of a device for feeding wire into a converter in the late stage of steel tapping according to an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Wire feeder; 2. Guide rail; 3. Conduit; 4. Pay-off machine; 5. Converter; 6. Aluminum wire; 7. Taphole; 8. Pulley; 9. First pinch roller; 10. Second pinch roller; 11. Fixed column; 12. Wire roller; 13. Air guide tube; 14. Molten steel; 15. Slag surface. DETAILED DESCRIPTION

[0023] The following describes preferred embodiments of the present invention in greater detail. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0024] The utility model provides a device for feeding wire into a converter in the late stage of steel tapping, comprising:

[0025] The wire feeding machine is slidably arranged on the guide rail, and a guide tube is provided at the wire outlet end of the wire feeding machine;

[0026] The pay-off machine is set at the end of the guide rail away from the converter, and the metal wire of the pay-off machine is connected to the wire inlet end of the wire feeder;

[0027] The feeding pipe is connected to the conduit, and the discharge end of the feeding pipe and the output end of the conduit are arranged at the same position.

[0028] Specifically, the device includes a wire feeder and a wire pay-off machine. The wire feeder can feed the metal wire in the wire pay-off machine into the molten steel, and then feed lime and refining slag into the molten steel through the feeding pipe, and at the same time add deoxidizers such as silicon carbide. This can shorten the refining and slagging time, accelerate the slagging effect of the top ash and top slag of the ladle, and enable the slag system in the ladle to reach the ability to absorb inclusions as soon as possible, which is conducive to improving the ability of the slag system to absorb inclusions during the refining process and improving the cleanliness of the molten steel.

[0029] Optionally, the conduit is L-shaped, one end of the conduit is connected to the wire feeding machine, and the other end of the conduit is arranged downward.

[0030] Specifically, the conduit is set in an L shape. During the translation of the wire feeder, the metal wire outlet end of the conduit always faces the setting direction. When the conduit is directly above the steel outlet of the converter, the position of the wire feeder can be locked. When the conduit feeds the metal wire into the converter and the lime into the feeding pipe, the deoxidation effect of the top ash and top slag of the ladle can be achieved.

[0031] Optionally, an air guide tube is further provided at the other end of the catheter, the air outlet of the air guide tube is arranged downward, and the other end of the catheter and the air outlet of the air guide tube are arranged in the same direction.

[0032] Optionally, the gas inlet of the gas guide tube is connected to an argon generator.

[0033] Specifically, the conduit is also provided with an air guide pipe, which can blow argon gas onto the surface of the molten steel before feeding the metal wire into the converter, so as to blow open the slag surface and then feed the metal wire.

[0034] Optionally, a control unit is further included, which is controlled and connected to the wire feeding machine and the argon generator.

[0035] Specifically, the position of the outlet end of the conduit and the order of adding argon gas and metal wire are controlled by the control unit to ensure the deoxidation effect on the top ash and top slag of the ladle.

[0036] Optionally, a position sensor is provided at the other end of the conduit, and the other end of the conduit is arranged opposite to the steel outlet of the converter.

[0037] Optionally, a pulley is provided at the bottom of the wire feeding machine, and a guide groove is provided on the guide rail, and the guide groove cooperates with the pulley.

[0038] Specifically, the wire feeder slides back and forth on the guide rail, and the moving trajectory of the wire feeder is controlled by the guide groove. When metal wire and lime need to be fed into the converter, the wire feeder is slid toward the converter.

[0039] Optionally, the wire feeding machine includes a first pinch roller and a second pinch roller, the metal wire passes through the first pinch roller and the second pinch roller in sequence, and a cutter is provided between the first pinch roller and the second pinch roller.

[0040] Specifically, two pinch rollers and a cutter are provided in the wire feeding machine. When it is necessary to feed metal wire into the converter, the metal wire from the wire unwinding machine can be conveyed to the second pinch roller through the first pinch roller, and then enters the conduit under the conveyance of the second pinch roller, and finally enters the molten steel from the conduit; the first pinch roller is always connected to the metal wire. When it is necessary to feed the metal wire into the converter, the first pinch roller rotates and transfers the metal wire to the rotating second pinch roller. When the metal wire is stopped from being fed into the converter, the cutter between the two pinch rollers cuts the metal wire, the first pinch roller stops rotating, and the second pinch roller also stops rotating after being separated from the metal wire. The entire wire feeding structure is simple in structure and stable in operation.

[0041] Optionally, the pay-off machine includes a fixed column and a wire roller, the wire roller is mounted on the fixed column via a bearing sleeve, and a metal wire is wound around the outer circumference of the wire roller.

[0042] Optionally, the metal wire is an aluminum wire.

[0043] Specifically, when the first pinch roller conveys the aluminum wire to the second pinch roller, the wire rollers rotate synchronously. When the first pinch roller stops conveying the wire, the wire rollers stop rotating, and the wire rollers ensure smooth wire output.

[0044] Example

[0045] like Figure 1As shown, the utility model provides a device for feeding wire into a converter in the late stage of steel tapping, comprising:

[0046] The wire feeding machine 1 is slidably arranged on the guide rail 2, and a guide tube 3 is provided at the wire outlet end of the wire feeding machine 1;

[0047] The pay-off machine 4 is arranged at the end of the guide rail 2 away from the converter 5, and the metal wire of the pay-off machine 4 is connected to the wire inlet end of the wire feeding machine 1;

[0048] The feeding pipe is connected to the conduit, and the discharge end of the feeding pipe and the output end of the conduit are arranged at the same position.

[0049] In this embodiment, the conduit 3 is L-shaped, one end of the conduit 3 is connected to the wire feeding machine 1, and the other end of the conduit 3 is arranged downward.

[0050] In this embodiment, an air guide tube 13 is further provided at the other end of the conduit 3 . The air outlet of the air guide tube 13 is arranged downward, and the other end of the conduit 3 and the air outlet of the air guide tube 13 are arranged in the same direction.

[0051] In this embodiment, the gas inlet of the gas guide tube 13 is connected to an argon gas generator.

[0052] In this embodiment, a control unit is further included, and the control unit is control-connected with the wire feeding machine 1 and the argon generator.

[0053] In this embodiment, a position sensor is provided at the other end of the conduit 3 , and the other end of the conduit 3 is arranged opposite to the steel outlet 7 of the converter 5 .

[0054] In this embodiment, a pulley 8 is provided at the bottom of the wire feeding machine 1 , and a guide groove is provided on the guide rail 2 , and the guide groove cooperates with the pulley 8 .

[0055] In this embodiment, the wire feeding machine 1 includes a first pinch roller 9 and a second pinch roller 10 , through which the metal wire passes in sequence, and a cutter is provided between the first pinch roller 9 and the second pinch roller 10 .

[0056] In this embodiment, the pay-off machine 4 includes a fixed column 11 and a wire roller 12 . The wire roller 12 is mounted on the fixed column 11 via a bearing sleeve, and a metal wire is wound around the outer circumference of the wire roller 12 .

[0057] In this embodiment, the metal wire is an aluminum wire 6 .

[0058] In summary, in the early stage of converter tapping, for aluminum-deoxidized steel grades, deoxidizers containing aluminum and the like are added to the ladle, and then alloys are added to the ladle; in the middle and late stages of tapping, after the alloys are added, the wire feeder 1 is opened to a predetermined position along the guide rail 2, so that the wire feeding outlet is located above the tapping port 7 of the converter 5, the argon switch is turned on, and the argon is blown along the gas guide pipe 13 to the slag surface 15 in the converter, and the slag surface 15 is blown open to leak the molten steel 14; the wire feeder 1 switch is turned on, and the aluminum wire 6 is fed into the molten steel 14 along the conduit 3, and then lime and pre-melted refined slag are added through the feeding pipe to align with the steel flow. After the wire feeding is completed, the wire feeder 1 is returned to the predetermined position, the argon is turned off, and lime and pre-melted refined slag are added to the ladle. At the same time, silicon carbide is added to the ladle to assist in deoxidation of the ladle slag surface. The minimum feed amount of aluminum wire is calculated based on the aluminum-oxygen balance: 2Al+3O=Al2O3. The weight of oxygen in the molten steel in the converter, W(O), is calculated as follows: (theoretical tapping amount of the converter - actual tapping amount)*converter carbon-oxygen product / converter end-point carbon content. The minimum aluminum content required, W(Al), is calculated as 54*W(O) / 48. The number of meters of aluminum wire required to be fed, L, is calculated as W(Al) / weight per meter of aluminum wire.

[0059] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A device for feeding wire into a converter in the late stage of steel tapping, characterized in that: include: A wire feeding machine is slidably arranged on the guide rail, and a guide tube is provided at the wire outlet end of the wire feeding machine; A wire pay-off machine is provided at one end of the guide rail away from the converter, and the metal wire of the wire pay-off machine is connected to the wire inlet end of the wire feeding machine; A feeding pipe is connected to the conduit, and a discharge end of the feeding pipe and an output end of the conduit are arranged at the same position.

2. The device for feeding wire into a converter in the late stage of steel tapping according to claim 1, characterized in that: The conduit is L-shaped, one end of the conduit is connected to the wire feeding machine, and the other end of the conduit is arranged downward.

3. The device for feeding wire into a converter in the late stage of steel tapping according to claim 2, characterized in that: An air guide tube is further provided at the other end of the conduit, an air outlet of the air guide tube is arranged downward, and the other end of the conduit and the air outlet of the air guide tube are arranged in the same direction.

4. The device for feeding wire into a converter in the late stage of steel tapping according to claim 3, characterized in that: The air inlet of the air guide tube is connected to the argon generator.

5. The device for feeding wire into a converter in the late stage of steel tapping according to claim 4, characterized in that: It also includes a control unit, which is controlled and connected to the wire feeding machine and the argon generator.

6. The device for feeding wire into a converter in the late stage of steel tapping according to claim 3, characterized in that: The other end of the conduit is provided with a position sensor, and the other end of the conduit is arranged opposite to the steel outlet of the converter.

7. The device for feeding wire into a converter in the late stage of steel tapping according to claim 1, characterized in that: A pulley is provided at the bottom of the wire feeding machine, and a guide groove is provided on the guide rail, and the guide groove cooperates with the pulley.

8. The device for feeding wire into a converter in the late stage of steel tapping according to claim 1, characterized in that: The wire feeding machine includes a first pinch roller and a second pinch roller. The metal wire passes through the first pinch roller and the second pinch roller in sequence. A cutter is provided between the first pinch roller and the second pinch roller.

9. The device for feeding wire into a converter in the late stage of steel tapping according to claim 1, characterized in that: The wire pay-off machine comprises a fixed column and a wire roller. The wire roller is sleeved on the fixed column via a bearing, and a metal wire is wound around the outer circumference of the wire roller.

10. The device for feeding wire into a converter in the late stage of steel tapping according to claim 1, characterized in that: The metal wire is an aluminum wire.

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