Off-centre single-lip refining furnace

Abstract

The application provides an eccentric single nozzle refining furnace, and relates to the field of refining furnaces. The eccentric single nozzle refining furnace comprises a ladle, a vacuum cylinder and an immersion tube arranged at the bottom of the vacuum cylinder and communicated with the vacuum cylinder. The bottom of the ladle is provided with a gas permeable brick for blowing argon gas towards the immersion tube. The outer side of the ladle is provided with a support. The top of the support is provided with a traction mechanism. The traction mechanism reciprocatingly moves a slag ladle along the vertical direction. The left side of the slag ladle is upwardly bent. The four walls of the slag ladle are each provided with a plurality of water permeable holes. The bottom of the slag ladle is arc-shaped. The outer wall of the slag ladle is spaced apart from the inner wall of the ladle, the outer wall of the vacuum cylinder and the outer wall of the immersion tube. The eccentric single nozzle refining furnace has the effect of reducing the circulation of the steel slag along the circulating molten steel.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refining furnaces, in particular to an eccentric single nozzle refining furnace. BACKGROUND

[0002] In the field of secondary refining, the molten steel vacuum refining equipment mainly includes a vacuum circulating degassing furnace and a single nozzle refining furnace. The single nozzle refining furnace uses a large immersion tube to replace the riser and downcomer of the vacuum circulating degassing furnace, and uses the bottom of the ladle to blow gas instead of the riser of the vacuum circulating degassing furnace. The degassing and decarburization effects of the single nozzle refining furnace are better than those of the vacuum circulating degassing process.

[0003] The single nozzle refining furnace relies on the argon bubbles flowing into the ladle bottom through the air brick to form a cycle. The molten steel rises to the liquid surface in the vacuum chamber, and due to the action of the subsequent flow, it moves along the surface of the molten steel away from the two-phase zone. At the same time, the gas content in the molten steel is continuously reduced (affected by the vacuum pump) and the liquid density becomes larger, so it flows downward under the action of its own gravity, forming a downflow channel. The combined action of the upflow channel and the downflow channel forms the circulating flow of the molten steel in the single nozzle refining furnace.

[0004] However, after the molten steel circulates and the steel slag reaches the molten steel surface of the ladle, the steel slag will form a stacking effect, causing part of the steel slag to return to the vacuum chamber under the action of the circulating molten steel, resulting in poor overall refining effect. SUMMARY

[0005] In order to improve the problem of repeated movement of steel slag with circulating molten steel and poor refining effect, the present application provides an eccentric single nozzle refining furnace.

[0006] The present application provides an eccentric single nozzle refining furnace, which adopts the following technical scheme:

[0007] The eccentric single nozzle refining furnace comprises a ladle, a vacuum cylinder and an immersion tube arranged at the bottom of the vacuum cylinder and communicating with the vacuum cylinder. The bottom of the ladle is provided with an air brick for blowing argon gas towards the immersion tube. The outer side of the ladle is provided with a support. The top of the support is provided with a traction mechanism. The traction mechanism pulls the slag bucket to move back and forth along the vertical direction. The left side of the slag bucket is curved upward. The four walls of the slag bucket are each provided with a plurality of water permeable holes. The bottom of the slag bucket is arc-shaped. There is a distance between the outer wall of the slag bucket and the inner wall of the ladle, the outer wall of the vacuum cylinder and the outer wall of the immersion tube.

[0008] By adopting the technical scheme, the argon generates the upward flow channel and the downward flow channel in the ladle and the immersion tube, the upward flow channel and the downward flow channel form the circulating flow of the molten steel, and then the molten steel slag is brought to the molten steel liquid level of the ladle, when the molten steel slag is accumulated more and forms the molten steel slag layer on the molten steel liquid level of the ladle, the traction mechanism is actuated, so that the slag skimming groove is moved downward, because the bottom of the slag skimming groove is arc-shaped, after the slag skimming groove is contacted with the molten steel slag layer, the molten steel slag can be easily pushed to the two sides of the slag skimming groove, and the slot of the slag skimming groove reaches the position of half of the thickness of the molten steel slag layer, because of the existence of the water permeable hole, during the movement of the slag skimming groove downward below the molten steel liquid level, the molten steel can enter the slag skimming groove, so as to reduce the resistance of the slag skimming groove moving downward, and the fluctuation range of the molten steel liquid level is reduced.

[0009] Then the traction mechanism pulls up the slag skimming groove, the molten steel returns to the ladle through the water permeable hole, the separation of the molten steel slag and the molten steel is realized, and the separation process is synchronous with the separation of the slag skimming groove and the molten steel slag layer, so that the splashing of the molten steel in the ladle caused by the slag skimming operation of the slag skimming groove is reduced to the greatest extent, on the one hand, the splashing of the molten steel can prevent the personnel from being injured, and the operation safety is improved, on the other hand, only the molten steel slag located on the upper part of the molten steel slag layer is skimmed out by the slag skimming groove, the molten steel liquid level in the ladle is still in the state of being covered by the molten steel slag, the oxidation of the molten steel by air is reduced, and by reducing the quantity of the molten steel slag as a whole, the quantity of the molten steel slag returning to the vacuum tube with the circulating molten steel is effectively reduced, the increase of the oxygen content of the molten steel and the decrease of the purity of the molten steel caused by the molten steel slag with high oxidation being returned to the vacuum tube again are avoided, and the refining effect is improved.

[0010] Preferably, the traction mechanism comprises a pair of winches, and the lifting ropes of the pair of winches are respectively and one-to-one connected with the left top of the slag skimming groove and the right top of the slag skimming groove.

[0011] By adopting the technical scheme, when the lifting ropes of the winches are lowered, the slag skimming groove moves downward, when the lifting ropes of the winches are wound, the slag skimming groove moves upward, and by the common traction of the pair of winches, the slag skimming groove can be more stable during the upward movement and the downward movement; further, the support has a through hole for the lifting ropes of the winches to pass through, and the inner diameter of the through hole is greater than twice the outer diameter of the lifting ropes of the winches, because the slag skimming groove needs to present different postures during the slag skimming, the lifting ropes of the two winches will be deflected at a certain angle, by setting the through hole with a larger inner diameter, it can be ensured that the lifting ropes of the winches will not interfere with the support during the deflection, and the wear of the lifting ropes of the winches is reduced.

[0012] Preferably, the pair of winches pull up or release the slag skimming groove upward or downward at different speeds.

[0013] By adopting the technical scheme, when the slag ladle moves downward and performs slagging, the lowering speed of the winch corresponding to the left side of the slag ladle is greater than the lowering speed of the winch corresponding to the right side of the slag ladle, so that the slag ladle gradually presents an inclined state of left low and right high, the contact area with the steel slag layer is reduced, the left side of the slag ladle presents a curved shape, the bottom of the slag ladle presents an arc shape, the slag ladle can more easily break the steel slag layer, after the left top of the slag ladle reaches a position of half the thickness of the steel slag layer, the winch corresponding to the left side of the slag ladle stops working, the winch corresponding to the right side of the slag ladle continues to lower until the slag ladle is in a horizontal state, so that the slag ladle gradually cuts into the steel slag layer, effectively reduces disturbance to the steel slag layer, and ensures that the steel slag layer always maintains the capping effect on the liquid surface of the molten steel in the ladle; after the slag ladle gradually presents a horizontal state, the slag ladle is kept still for a period of time, after the liquid surface of the molten steel in the ladle is in a relatively balanced state, then any winch is started first to make the slag ladle present an inclined state again, so as to facilitate the slag ladle to break the steel slag layer and also facilitate the molten steel in the slag ladle to flow back to the ladle through the water-permeable return, when the bottom of the slag ladle completely leaves the steel slag layer, the other winch is accelerated to wind, so that the slag ladle presents a horizontal state, after the slag ladle moves away from the ladle, the winch corresponding to the right side of the slag ladle is accelerated to wind, so that the slag ladle presents an inclined state of left low and right high, and the slag is conveniently poured out from the slag ladle.

[0014] Preferably, the axis of the immersion tube is separated from the axis of the ladle, the distance between one side of the outer wall of the immersion tube and one side of the inner wall of the ladle is greater than the distance between the other side of the outer wall of the immersion tube and the other side of the inner wall of the ladle, and the slag ladle moves up and down between one side of the outer wall of the immersion tube and one side of the inner wall of the ladle.

[0015] By adopting the technical scheme, a larger space can be formed between the inner wall of the ladle and the outer wall of the immersion tube, so that a larger slag ladle can be used, the amount of slag that can be dredged by the slag ladle in a single operation is increased, the slag dredging efficiency is effectively improved, and it is more easy to avoid contact between the slag ladle and the ladle or the immersion tube, so that uncontrollable shaking of the slag ladle is avoided, and the stability and safety of the slag dredging process are ensured.

[0016] Preferably, the upper part of the support is further provided with a screw rod and a light rod which are parallel to each other, a sliding block is provided on the screw rod and the light rod, the sliding block is threadedly connected with the screw rod, and the sliding block is slidingly connected with the light rod; a first motor drives the screw rod to rotate; the bottom of the sliding block is provided with a connecting frame which connects the sliding block and the vacuum cylinder.

[0017] By adopting the technical scheme, the sliding block is provided with a pair of through holes, one of which has a smooth inner wall and is matched with the polished rod, and the other of which has an inner thread matched with the outer thread of the screw rod, so that the polished rod can limit the rotation of the sliding block under the driving of the first motor without affecting the movement of the sliding block, thereby ensuring that the sliding block can drive the horizontal displacement of the sliding block through the threaded connection between the sliding block and the screw rod, thereby adjusting the relative position between the immersion tube and the ladle, changing the contact position of the argon blown by the gas permeable brick with the immersion tube, and changing the upflow channel and the downflow channel, so that the circulation effect of the molten steel in the ladle is improved, and the refining effect of the molten steel is improved; and in the process of moving the immersion tube, the uniform thickness of the slag layer can be restored, so that the slag notch can maintain reliable slagging and reduce the disturbance to the molten steel in the next slagging process.

[0018] Preferably, when the first motor is in operation, the slag notch is located outside the ladle.

[0019] By adopting the technical scheme, when the first motor is in operation, the position of the immersion tube and the vacuum cylinder will change, and the slag notch is pulled out of the ladle in advance by the pair of winches, which can prevent the slag notch from colliding with the immersion tube and the vacuum cylinder, and improve the stability and safety of the whole operation.

[0020] Preferably, the connecting frame is further provided with a second motor, the output shaft of the second motor is coaxially arranged with the vacuum cylinder, the second motor drives the rotation of the vacuum cylinder and the immersion tube, and the top of the vacuum cylinder and the bottom of the connecting frame are separated from each other.

[0021] By adopting the technical scheme, the second motor can drive the rotation of the vacuum cylinder and the immersion tube, so that the upflow channel formed by the argon blown by the gas permeable brick can gradually sweep along the inner wall of the immersion tube, thereby maximizing the circulation effect of the molten steel in the ladle and the immersion tube, and significantly improving the refining effect of the molten steel; a connecting rod can be arranged on the shell of the second motor to connect the second motor and the connecting frame, so as to avoid placing the end surface of the second motor directly on the connecting frame and causing damage to the second motor; a bearing can be arranged on the top of the vacuum cylinder, and the output shaft of the second motor is inserted into the bearing, so as to ensure that the driving of the second motor to the vacuum cylinder is more stable; a transmission mechanism can be arranged between the output shafts of the second motor of the vacuum cylinder, so as to ensure that the driving is more stable, and the weight of the vacuum cylinder and the immersion tube can be reduced to prevent the second motor from being damaged by the pulling force.

[0022] Preferably, the gas permeable brick is located below the immersion tube, and the gas permeable brick blows argon towards the side of the immersion tube close to the slag notch.

[0023] By adopting the technical scheme, the upward flow channel formed by blowing argon by the gas-permeable brick is attached to the inner wall of the immersion pipe, and the upward flow channel is also close to the slag notch, so that the slag layer on the liquid surface of the ladle is subjected to upward pushing force generated by the upward flow channel, and then can be more stably stayed in the ladle, the number of the slag brought back into the vacuum cylinder is reduced, the purity of the molten steel is improved, and the refining effect of the molten steel is improved.

[0024] Preferably, the outer wall of the vacuum cylinder is provided with a gas extraction pipe, which extracts the gas in the vacuum cylinder outward.

[0025] By adopting the technical scheme, the gas extraction pipe extracts the gas in the vacuum cylinder outward, so that the vacuum suction force can be formed in the vacuum cylinder, the flow of the upward flow channel is facilitated, and the flow of the downward flow channel is also promoted, thereby forming a reliable closed loop circulation.

[0026] Preferably, the support is driven to ascend and descend by a hydraulic cylinder.

[0027] By adopting the technical scheme, the immersion depth of the immersion pipe can be controlled by the ascending and descending of the support, thereby controlling the flow speed and flow range of the upward flow channel and the downward flow channel, and on the other hand, the immersion pipe can be completely driven away from the ladle after the refining of the molten steel is completed, so as to facilitate the transfer of the molten steel in the ladle.

[0028] In summary, the present application has the following beneficial effects:

[0029] 1. The pair of winches are used to pull the slag notch, and the posture of the slag notch is changed during the pulling process, so that the slag notch is cut into the slag layer in a slanting direction from a horizontal direction, then the slag is removed in a horizontal direction from a slanting direction, and finally the slag notch is separated from the slag layer in a slanting direction from a horizontal direction, so that the splashing of the molten steel in the ladle caused by the slag removal operation of the slag notch is avoided to the greatest extent, the operation safety is improved, and the oxidation of the molten steel by air is reduced.

[0030] 2. The horizontal movement of the immersion pipe is realized by the cooperation of the first motor, the polished rod, the screw rod and the sliding block, the rotation of the immersion pipe is realized by the cooperation of the second motor and the connecting frame, the flow position of the upward flow channel generated by blowing argon by the gas-permeable brick is changed by the two driving forms, and then the circulation range of the molten steel is changed, so that the circulation effect of the molten steel is improved, the temperature in the molten steel is promoted to a uniform state, and then the refining effect of the molten steel is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic perspective view of the present application;

[0032] Figure 2 is a schematic top view of the present application;

[0033] Figure 3 is a schematic cross-sectional view taken along the section line A-A in Figure 2 ;

[0034] Figure 4 is a schematic action state reference diagram of Figure 3 ;

[0035] Figure 5 is a schematic perspective view of a slag ladle;

[0036] In the figure: 1, a ladle; 11, a gas-permeable brick; 12, a slag layer; 2, a vacuum cylinder; 20, an exhaust pipe; 3, an immersion pipe; 4, a support; 5, a slag ladle; 50, a water-permeable hole; 6, a winch; 60, a lifting rope; 71, a screw rod; 72, a polished rod; 73, a sliding block; 74, a first motor; 8, a connecting frame; 90, a second motor. DETAILED DESCRIPTION

[0037] The following will be described in detail in combination with the accompanying Figures 1-5 Further detailed description will be made to the present application.

[0038] Figure 1 is a schematic perspective view of the present application, Figure 2 is a schematic top view of the present application. Referring to Figure 1 and Figure 2 , an eccentric single nozzle refining furnace comprises a ladle 1, a vacuum cylinder 2 and an immersion pipe 3 arranged at the bottom of the vacuum cylinder 2 and communicated with the vacuum cylinder 2, a gas-permeable brick 11 arranged on the outer wall of the vacuum cylinder 2 for blowing argon gas towards the immersion pipe 3, the gas-permeable brick 11 and the immersion pipe 3 being arranged eccentrically, a support 4 arranged at the outer side of the ladle 1, a traction mechanism mounted at the top of the support 4, the traction mechanism being a pair of winches 6, and a lifting rope 60 of each winch 6 being connected with the left top of a slag ladle 5 and the right top of the slag ladle 5 respectively and one by one. Further, the slag ladle 5 is arranged in the ladle 1 and does not contact with the inner wall of the ladle 1, the outer wall of the immersion pipe 3 and the outer wall of the vacuum cylinder 2, so as to ensure that the pair of winches 6 can better adjust the posture of the slag ladle 5. Figure 3

[0039] Figure 3 is a schematic cross-sectional view taken along the section line A-A in Figure 2 , Figure 4 is a schematic action state reference diagram of Figure 3 . Referring to Figure 3 and Figure 4 , the pair of winches 6 are operated at different speeds, so that the slag ladle 5 presents different postures in the process of ascending or descending, Figure 5 ​is a schematic perspective view of the slag notch 5, see Figure 5 The slag notch 5 is provided with a plurality of water-permeable holes 50 on the peripheral wall. Specifically, when the slag notch 5 is in a left-low and right-high posture, the left side of the upwardly curved slag notch 5 can more easily push the steel slag layer 12 apart to the two sides of the slag notch 5 with a smaller contact area, so as to cut into the steel slag layer 12, and the movement of the steel slag to the two sides of the slag notch 5 is smoother, so as to prevent the steel slag from splashing everywhere. When the left side top of the slag notch 5 is at a position of half the thickness of the steel slag layer 12, the slag notch 5 is in a left-right equal height posture. The steel slag layer 12 has entered the slag notch 5 from the left-low and right-high posture of the slag notch 5 to the left-right equal height posture. Then, when the slag notch 5 is in an inclined state (at this time, the slag notch 5 can be in a left-low and right-high posture or a left-high and right-low posture), the molten steel can pass through the slag notch 5 from the water-permeable holes 50 and flow back into the ladle 1, so as to realize the slagging action.

[0040] The above slagging process can reduce the disturbance effect of the slag notch 5 on the steel slag layer 12 when the slag notch 5 enters and leaves the steel slag layer 12. On the one hand, it can prevent the molten steel from splashing and improve the operation safety. On the other hand, it can maintain the state that the steel slag layer 12 covers the molten steel surface in the ladle 1, prevent the molten steel from oxidizing, and improve the refining effect. After the slagging is completed, the two winches 6 are adjusted to change the posture of the slag notch 5 from a left-low and right-high inclined state to a state of gradually rotating around the left side of the slag notch 5 to the right side of the slag notch 5, so as to facilitate the dumping and recycling of the steel slag from the slag notch 5.

[0041] The axis of the immersion tube 3 and the axis of the ladle 1 are in a state of mutual deviation, that is, the distance between one side of the outer wall of the immersion tube 3 and one side of the inner wall of the ladle 1 is greater than the distance between the other side of the outer wall of the immersion tube 3 and the other side of the inner wall of the ladle 1. In this way, the distance between the immersion tube 3 and the ladle 1 can be dynamically expanded, so as to facilitate the selection of a larger slag notch 5 for slagging operation, improve the single slagging amount, and avoid the oxidation of the molten steel in the repeated slagging process. Moreover, after the argon gas blown by the gas permeable brick 11 forms an upward flow channel, it can adhere to one side of the inner wall of the immersion tube 3, so that the downward flow channel can adhere to the other side of the inner wall of the immersion tube 3, thereby improving the range of molten steel circulation, making the components in the molten steel and the molten steel temperature more uniform, and further improving the refining effect of the molten steel.

[0042] Referring to Figure 1The upper portion of the support 4 is further provided with a screw rod 71 and a light rod 72 which are parallel to each other, the screw rod 71 is rotatably installed on the support 4, the light rod 72 is fixedly connected with the support 4, a sliding block 73 is provided on the screw rod 71 and the light rod 72, the sliding block 73 is provided with a pair of through holes, the screw rod 71 and the light rod 72 are respectively and one-to-one correspondingly provided in the pair of through holes, the screw rod 71 is threadedly connected with one through hole, the light rod 72 is slidably connected with the other through hole, the light rod 72 can limit the rotation of the sliding block 73 but does not limit the displacement of the sliding block 73, a first motor 74 is installed on the support 4, the output shaft of the first motor 74 is coaxially connected with the screw rod 71, so that the sliding block 73 can reliably horizontally displace under the driving of the first motor 74, and since the sliding block 73 is connected with the connecting frame 8, the movement of the connecting frame 8 and the vacuum cylinder 2 and the immersion pipe 3 can be driven by the movement of the sliding block 73, meanwhile, the connecting frame 8 is further provided with a second motor 90, the output shaft of the second motor 90 is coaxially arranged with the vacuum cylinder 2, the second motor 90 drives the vacuum cylinder 2 and the immersion pipe 3 to rotate, that is, the horizontal displacement of the vacuum cylinder 2 and the immersion pipe 3 can be realized by the action of the first motor 74, and the rotation of the vacuum cylinder 2 and the immersion pipe 3 around the axis thereof can be realized by the action of the second motor 90.

[0043] Through the above two movement modes, the flow position of the upward flow channel generated by the argon blowing of the gas-permeable brick 11 is changed from a static single columnar upward flow channel to a columnar upward flow channel capable of generating sweeping, so that the molten steel at different positions in the ladle 1 can enter into a circulating state, the circulating effect of the molten steel is improved, the temperature in the molten steel is promoted to reach a uniform state, and thus the refining effect of the molten steel is significantly improved; further, the support 4 can also be driven to ascend and descend by the hydraulic cylinder (the hydraulic cylinder driving the support 4 to ascend and descend is prior art, and thus is not shown in the figure), on the one hand, the immersion depth of the immersion pipe 3 can be controlled, and on the other hand, after the refining of the molten steel is completed, the immersion pipe 3 and the vacuum cylinder 2 can be completely driven away from the ladle 1, so as to facilitate the transfer of the molten steel in the ladle 1.

[0044] The working process of the present application in use is specifically as follows: the argon blown by the gas-permeable brick 11 forms an upward flow channel, and then forms a downward flow channel in the vacuum cylinder 2, so that the molten steel forms a circulation in the ladle 1, the immersion pipe 3 and the vacuum cylinder 2, and thus the molten steel at different positions in the ladle 1, the immersion pipe 3 and the vacuum cylinder 2 can quickly circulate and flow, and the refining effect of the molten steel is effectively improved.

[0045] In the refining process, a slag layer 12 is formed at the molten steel surface of the ladle 1. The ladle 5 is pulled by a pair of winches 6, and the posture of the ladle 5 is changed during the pulling process. When the ladle 5 cuts into the slag layer 12, the ladle 5 is in an inclined state with the left side low and the right side high, so that the ladle 5 can cut into the slag layer 12 with a small contact area. When the slag is removed, the ladle 5 is in a horizontal state with the left side and the right side at the same height, and the notch of the ladle 5 is at a position at half the thickness of the slag layer 12. When the ladle 5 is separated from the ladle 1 to complete the slag removal, the ladle 5 is in an inclined state, so that the ladle 5 can cut out the slag layer 12 with a small contact area. During the cutting process, the molten steel in the ladle 5 can be discharged through the water hole 50. The disturbance of the molten steel in the ladle 1 during the entire slag removal process prevents the molten steel from splashing and causing personal injury, improves the safety of the operation, and maintains the state of the slag layer 12 covering the molten steel surface during the slag removal process. However, the thickness of the slag layer 12 gradually decreases, and the bottom of the slag layer 12 is closer to the molten steel surface in the ladle 1, which can effectively reduce the probability and quantity of slag backflow, prevent the oxidation of the molten steel, and improve the refining effect of the molten steel.

[0046] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered by the protection scope of the present application.

Claims

1. An eccentric single-nozzle refining furnace, comprising a ladle (1), a vacuum cylinder (2), and an impregnation tube (3) disposed at the bottom of the vacuum cylinder (2) and communicating with the vacuum cylinder (2), wherein the bottom of the ladle (1) is provided with a permeable brick (11) for blowing argon gas toward the impregnation tube (3), characterized in that, The steel ladle (1) is provided with a support (4) on the outside. The top of the support (4) is provided with a traction mechanism. The traction mechanism pulls the slag trough (5) to move back and forth in the vertical direction. The left side of the slag trough (5) is bent upward. The four walls of the slag trough (5) are provided with several water-permeable holes (50). The bottom of the slag trough (5) is arc-shaped. There is a distance between the outer wall of the slag trough (5) and the inner wall of the steel ladle (1), the outer wall of the vacuum cylinder (2), and the outer wall of the immersion tube (3). The traction mechanism includes a pair of winches (6), and the hoisting ropes (60) of the pair of winches (6) are respectively and correspondingly connected to the top left side and the top right side of the slag trough (5); The pair of winches (6) pull upward or release downward into the slag trough (5) at different speeds; The axis of the impregnation tube (3) is separated from the axis of the ladle (1). The distance between one side of the outer wall of the impregnation tube (3) and one side of the inner wall of the ladle (1) is greater than the distance between the other side of the outer wall of the impregnation tube (3) and the other side of the inner wall of the ladle (1). The slag removal trough (5) moves up and down between one side of the outer wall of the impregnation tube (3) and one side of the inner wall of the ladle (1).

2. The eccentric single-nozzle refining furnace according to claim 1, characterized in that, The upper part of the bracket (4) is provided with a lead screw (71) and a guide rod (72) that are parallel to each other. A slider (73) is passed through the lead screw (71) and the guide rod (72). The slider (73) is connected to the lead screw (71) by a thread. The slider (73) is slidably connected to the guide rod (72). The first motor (74) drives the lead screw (71) to rotate. The bottom of the slider (73) is provided with a connecting frame (8). The connecting frame (8) connects the slider (73) and the vacuum cylinder (2).

3. The eccentric single-nozzle refining furnace according to claim 2, characterized in that, When the first motor (74) is in operation, the slag trough (5) is located outside the ladle (1).

4. The eccentric single-nozzle refining furnace according to claim 2, characterized in that, The connecting frame (8) is equipped with a second motor (90), the output shaft of the second motor (90) is coaxially arranged with the vacuum cylinder (2), the second motor (90) drives the vacuum cylinder (2) and the impregnation tube (3) to rotate, and the top of the vacuum cylinder (2) is separated from the bottom of the connecting frame (8).

5. The eccentric single-nozzle refining furnace according to claim 4, characterized in that, The permeable brick (11) is located below the impregnation tube (3), and the permeable brick (11) blows argon gas toward the side of the impregnation tube (3) near the slag trough (5).

6. The eccentric single-nozzle refining furnace according to claim 1, characterized in that, The vacuum cylinder (2) is provided with an extraction pipe (20) on its outer wall, which extracts the gas inside the vacuum cylinder (2) outward.

7. The eccentric single-nozzle refining furnace according to any one of claims 1-6, characterized in that, The bracket (4) is lifted and lowered by a hydraulic cylinder.

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