Device for refining molten steel by bottom spraying slag charge

Abstract

The utility model discloses a device for refining molten steel by bottom spraying slag charge, and relates to the technical field of metallurgy. The device comprises a tank body, a main stirring rod, auxiliary stirring rods, a nitrogen tank and a slag tank, a cover plate is arranged at the upper end of the tank body, a preformed hole for mounting the main stirring rod is formed in the middle of the cover plate, the preformed hole is connected with the main stirring rod through a sealing bearing, the two sides of the bottom of the main stirring rod are communicated with the auxiliary stirring rods, and the auxiliary stirring rods are connected with the nitrogen tank through a sealing bearing. One-way discharging nozzles for discharging slag powder are arranged on the outer surfaces of the auxiliary stirring rods at equal intervals, and the upper end of the main stirring rod is communicated with a three-way pipe through a rotary joint. And the slag charge and the molten steel can be fully mixed by utilizing the rotating auxiliary stirring rod and the main stirring rod, so that compared with a contact mode of the slag charge discharged from the top end and the molten steel, the contact area of the slag charge and the molten steel is obviously larger, and the mixing effect is better.

Description

TECHNICAL FIELD

[0001] The utility model belongs to metallurgical technical field, concretely relates to a kind of bottom spray slag material refined molten steel device. BACKGROUND

[0002] With the improvement of the quality requirement of steel in manufacturing industry, LF furnace refining as one of the main means to improve the quality of steel, outside refining process flow is widely used in domestic and foreign large steel plant, has become indispensable important link even decisive link in modern steel process, LF furnace in refining process, add refining slag and active lime, improve the stable reducing atmosphere in steel through white slag process, reach the main purpose of rapid deoxidation, desulfurization, in addition, through slag system adjustment, also can control the shape of inclusions in steel, it has irreplaceable effect for improving the quality of steel;

[0003] The current most of the device send in refining slag and active lime mode is from top, and top enters so that molten steel cannot be in contact with refining slag and active lime, in view of this, the utility model is proposed. INVENTION CONTENTS

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, and provide a bottom spray slag material refined molten steel device.

[0005] To solve the above technical problems, the basic idea of the technical scheme of the utility model is:

[0006] A bottom spray slag material refined molten steel device, including tank body, main stirring rod, auxiliary stirring rod, nitrogen tank and slag tank, the upper end of the tank body is provided with a cover plate, a reserved hole for installing the main stirring rod is formed in the middle of the cover plate, the reserved hole and the main stirring rod are connected through a sealing bearing, the bottom of the main stirring rod is communicated with the auxiliary stirring rod on both sides, a one-way discharge nozzle for discharging slag powder is arranged at equal intervals on the outer surface of the auxiliary stirring rod, and a tee joint is communicated with the upper end of the main stirring rod through a rotary joint;

[0007] The feeding end of the tee joint is communicated with a first one-way electromagnetic valve, the other end of the first one-way electromagnetic valve is communicated with the bottom of the slag tank, the top end of the tee joint is communicated with a second one-way electromagnetic valve, the second one-way electromagnetic valve is communicated with the gas delivery end of the gas pump through a pipeline, and the negative pressure end of the gas pump is communicated with the exhaust end of the valve at the top of the nitrogen tank through a negative pressure pipe;

[0008] The outer part of the upper end of the main stirring rod is fixedly sleeved with a driven gear engaged with a driving gear, and the driving gear is fixedly sleeved outside the output shaft of the motor, a liquid inlet electromagnetic valve for molten steel entering is installed on the upper end of one side of the tank body, and a liquid outlet electromagnetic valve for molten steel discharging is communicated with the bottom of the tank body.

[0009] Optionally, both ends of the cover plate are hinged to the T-shaped rod through the sleeve block, a screw thread matched with the nut is arranged outside the vertical end of the T-shaped rod, the vertical end of the T-shaped rod is located in the limiting groove arranged on both sides of the upper end of the tank body, the bottom of the cover plate is fixed with a sealing ring, and the bottom surface of the sealing ring is in contact with the top surface of the tank body.

[0010] Optionally, the upper end of the main stirring rod is further sleeved with a supporting ring, the supporting ring is arranged below the driven gear, and the supporting ring is located in the annular part on the top of the cover plate, the inside of the annular part is provided with a plurality of rolling balls between the supporting ring and the cover plate.

[0011] Optionally, one side of the upper end of the cover plate is provided with an exhaust pipe and an air pressure gauge, the upper end of the exhaust pipe is communicated with a third one-way electromagnetic valve, the exhaust end of the third one-way electromagnetic valve is externally threadedly connected with a filter cover, the insertion end of the filter cover is externally provided with a sealing element abutting against the inner wall of the exhaust end, a reserved hole for gas entering is arranged in the insertion end of the filter cover, an air filter element is arranged in the insertion end of the filter cover, a through hole for mounting a filter screen is arranged in the top of the filter cover, and the filter screen is located above the air filter element.

[0012] Optionally, one side of the upper end of the cover plate is fixed with a first supporting part, the side of the first supporting part is fixed with a limiting ring, the limiting ring is fixed to the slag tank through the limiting bolt at the front end, one side of the upper end of the slag tank is hinged with a top cover, the other side of the top cover is fixed to the slag tank through a screw, and the top of the top cover is fixed with a controller.

[0013] Optionally, the lower end of the top cover is fixed with base blocks at equal intervals, the lower end of each base block is connected with an auxiliary rod through a spring, the top end of the auxiliary rod is internally fixed with a micro vibration motor, the micro vibration motor is sequentially penetrated through the auxiliary rod, the base block and the top of the cover plate through wires and is connected with the controller circuit, the outside of the spring is sleeved with an elastic sleeve, and the upper and lower ends of the elastic sleeve are fixed with the base block and the auxiliary rod.

[0014] Optionally, the other side of the upper end of the cover plate is fixed with a machine box for placing a motor through a second supporting part, the top of the machine box is fixed with a bottom support of the air pump, and the bottom of the machine box is provided with a gap hole for penetrating the output shaft of the motor.

[0015] Optionally, the side of the tank body is fixed with a supporting support for placing a nitrogen tank, and the side of the tank body is further fixed with a positioning ring, the inside of each positioning ring is matched with the outside of the nitrogen tank in size.

[0016] After the above technical scheme is adopted, the present application has the following advantages compared with the prior art, of course, any product implementing the present application does not necessarily need to achieve all the advantages described below:

[0017] 1. The slag can be sprayed to the inside of the tank through the one-way discharge nozzle on the auxiliary stirring rod on both sides of the main stirring rod, and then the rotating auxiliary stirring rod and the main stirring can ensure the full mixing of the slag and the molten steel, so that compared with the top discharge slag and the molten steel contact mode, the contact area of the slag and the molten steel is obviously larger, and the mixing effect is better;

[0018] 2. The utility model discloses consider the existence of the slag storage process of powder granular slag hardening, will lead to difficult feeding, therefore designed above -mentioned structure, will pass through the vibration of miniature vibration motor and make the vibration of auxiliary stick, the vibration of multiple auxiliary sticks can loose the hardening slag in the slag tank, thereby avoid the difficult feeding condition due to the hardening of slag.

[0019] The specific embodiments of the utility model will be described in further detail below in combination with the drawings. DRAWINGS

[0020] The drawings in the following description are only some embodiments, and other drawings can be obtained according to these drawings without paying creative labor for ordinary skilled in the art. In the drawings

[0021] In the drawings:

[0022] Figure 1 It is the main view cross section structure schematic drawing of the utility model;

[0023] Figure 2 It is Figure 1 The A part structure enlarged schematic drawing in;

[0024] Figure 3 It is Figure 1 The B part structure enlarged schematic drawing in;

[0025] Figure 4 It is Figure 1 The C part structure enlarged schematic drawing in;

[0026] Figure 5 It is Figure 1 The D part structure enlarged schematic drawing in.

[0027] In the drawings, the component list represented by each sign is as follows:

[0028] 1, tank; 2, cover plate; 3, main stirring rod; 4, auxiliary stirring rod; 5, one-way discharge nozzle; 6, rotary joint; 7, tee pipe; 8, first one-way electromagnetic valve; 9, slag tank; 10, second one-way electromagnetic valve; 11, air pump; 12, negative pressure pipe; 13, nitrogen tank; 14, drive gear; 15, driven gear; 16, motor; 17, liquid inlet electromagnetic valve; 18, liquid discharge electromagnetic valve; 19, sleeve block; 20, T-shaped rod; 21, nut; 22, limiting groove; 23, sealing ring; 24, supporting ring; 25, positioning ring; 26, ring member; 27, ball; 28, exhaust pipe; 29, air pressure gauge; 30, third one-way electromagnetic valve; 31, filter cover; 32, sealing member; 33, air filter element; 34, filter screen; 35, first support; 36, limiting ring; 37, limiting bolt; 38, top cover; 39, controller; 40, base block; 41, spring; 42, auxiliary rod; 43, miniature vibration motor; 44, telescopic sleeve; 45, second support; 46, case; 47, supporting bracket.

[0029] It should be noted that the drawings and the written description are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0030] The present application will now be further described in detail with reference to the accompanying drawings.

[0031] Please refer to Figures 1 to 5 The present application provides a technical solution: a bottom-spraying slag refining molten steel device, comprising a tank 1, a main stirring rod 3, an auxiliary stirring rod 4, a nitrogen tank 13 and a slag tank 9, the upper end of the tank 1 is provided with a cover plate 2, a reserved hole for installing the main stirring rod 3 is formed in the middle of the cover plate 2, the reserved hole and the main stirring rod 3 are connected through a sealing bearing, the bottom of the main stirring rod 3 is communicated with the auxiliary stirring rod 4 on both sides, one-way discharge nozzles 5 for discharging slag powder are arranged at equal intervals on the outer surface of the auxiliary stirring rod 4, the upper end of the main stirring rod 3 is communicated with a tee pipe 7 through a rotary joint 6;

[0032] The feeding end of the tee pipe 7 is communicated with a first one-way electromagnetic valve 8, the other end of the first one-way electromagnetic valve 8 is communicated with the bottom of the slag tank 9, the top end of the tee pipe 7 is communicated with a second one-way electromagnetic valve 10, the second one-way electromagnetic valve 10 is communicated with the gas delivery end of an air pump 11 through a pipeline, the negative pressure end of the air pump 11 is communicated with the exhaust end of the valve at the top of a nitrogen tank 13 through a negative pressure pipe 12;

[0033] The outer part of the upper end of the main stirring rod 3 is sleeved with a driven gear 15 engaged with a driving gear 14, the driving gear 14 is fixed on the outer part of the output shaft of a motor 16, the upper end of one side of the tank body 1 is provided with a liquid inlet electromagnetic valve 17 for molten steel, the bottom of the tank body 1 is communicated with a liquid outlet electromagnetic valve 18 for discharging molten steel, considering that the current most of the devices send refining slag and active lime from the top, and the top entering makes the molten steel unable to fully contact with the refining slag and the active lime, the slag material can be sprayed to the inside of the tank body 1 through the one-way discharge nozzle 5 on the auxiliary stirring rod 4 on both sides of the main stirring rod 3, and after the slag material is discharged from the molten steel, the rotating auxiliary stirring rod 4 and the main stirring can ensure the full mixing of the slag material and the molten steel, so that compared with the top discharge slag material and the molten steel contact mode, the contact area of the slag material and the molten steel is obviously larger, and the mixing effect is better, and the slag material enters the process, and nitrogen in the nitrogen cylinder is sent to the one-way discharge nozzle 5 by the air pump 11.

[0034] Wherein, the both ends of the cover plate 2 are hinged with T-shaped rods 20 through sleeve blocks 19, the vertical end of the T-shaped rod 20 is provided with a screw thread matched with a nut 21 outside, and the vertical end of the T-shaped rod 20 is located in the limiting groove 22 opened on both sides of the upper end of the tank body 1, the bottom of the cover plate 2 is fixed with a sealing ring 23, and the bottom surface of the sealing ring 23 is in contact with the top surface of the tank body 1, the sealing ring 23 further strengthens the sealing between the tank body 1 and the cover plate 2, the T-shaped rod 20 cooperates with the nut 21 to fix the cover plate 2 and the tank body 1, and the threaded connection facilitates workers to disassemble the cover plate 2 for maintenance of parts on the cover plate 2.

[0035] Wherein, the outer side of the upper end of the main stirring rod 3 is further sleeved with a supporting ring 24, the supporting ring 24 is arranged below the driven gear 15, and the supporting ring 24 is located in the annular part 26 on the top of the cover plate 2, the inside of the annular part 26 is provided with a ball 27, and the ball 27 is located between the supporting ring 24 and the cover plate 2, the ball 27 reduces the friction between the cover plate 2 and the supporting ring 24, and the existence of the supporting ring 24 makes the weight of the main stirring rod 3 shared by the supporting ring 24 and the ball 27 to avoid excessive stress on the sealing bearing.

[0036] The upper end of the cover plate 2 is provided with an exhaust pipe 28 and an air pressure gauge 29 on one side, the upper end of the exhaust pipe 28 is communicated with a third one-way electromagnetic valve 30, the exhaust end of the third one-way electromagnetic valve is externally threaded connected with a filter cover 31, the plug-in end of the filter cover 31 is externally provided with a sealing element 32 abutting against the inner wall of the exhaust end, a reserved hole for gas entering is formed in the plug-in end of the filter cover 31, and an air filter element 33 is arranged in the plug-in end of the filter cover 31, a through hole for mounting a filter screen 34 is formed in the top of the filter cover 31, and the filter screen 34 is located above the air filter element 33. The air pressure gauge 29 is arranged to monitor the air pressure in the tank body 1. When the air pressure is too high, the exhaust gas will be discharged through the opened third one-way electromagnetic valve 30, and the exhaust gas is filtered by the air filter element 33 and the filter screen 34.

[0037] The upper end of the cover plate 2 is provided with an exhaust pipe 28 and an air pressure gauge 29 on one side, the upper end of the exhaust pipe 28 is communicated with a third one-way electromagnetic valve 30, the exhaust end of the third one-way electromagnetic valve is externally threaded connected with a filter cover 31, the plug-in end of the filter cover 31 is externally provided with a sealing element 32 abutting against the inner wall of the exhaust end, a reserved hole for gas entering is formed in the plug-in end of the filter cover 31, and an air filter element 33 is arranged in the plug-in end of the filter cover 31, a through hole for mounting a filter screen 34 is formed in the top of the filter cover 31, and the filter screen 34 is located above the air filter element 33. The air pressure gauge 29 is arranged to monitor the air pressure in the tank body 1. When the air pressure is too high, the exhaust gas will be discharged through the opened third one-way electromagnetic valve 30, and the exhaust gas is filtered by the air filter element 33 and the filter screen 34.

[0038] The lower end of the top cover 38 is fixed with base blocks 40 at equal intervals, the lower end of each base block 40 is connected with an auxiliary rod 42 through a spring 41, the top end of the auxiliary rod 42 is internally fixed with a micro vibration motor 43, the micro vibration motor 43 is sequentially penetrated through the auxiliary rod 42, the base block 40 and the top of the cover plate 2 through wires and is electrically connected with the controller 39, the outside of the spring 41 is sleeved with an expansion sleeve 44, and the upper and lower ends of the expansion sleeve 44 are fixed with the base block 40 and the auxiliary rod 42. Considering that the powder granular slag storage process may be hardened, which may cause difficult discharging, the above structure is designed, the auxiliary rod 42 is vibrated by the micro vibration motor 43, and a plurality of auxiliary rods 42 vibrate to loosen the hardened slag in the slag tank 9, so that the difficult discharging caused by the hardened slag is avoided.

[0039] The upper end of the cover plate 2 is provided with an exhaust pipe 28 and an air pressure gauge 29 on one side, the upper end of the exhaust pipe 28 is communicated with a third one-way electromagnetic valve 30, the exhaust end of the third one-way electromagnetic valve is externally threaded connected with a filter cover 31, the plug-in end of the filter cover 31 is externally provided with a sealing element 32 abutting against the inner wall of the exhaust end, a reserved hole for gas entering is formed in the plug-in end of the filter cover 31, and an air filter element 33 is arranged in the plug-in end of the filter cover 31, a through hole for mounting a filter screen 34 is formed in the top of the filter cover 31, and the filter screen 34 is located above the air filter element 33. The air pressure gauge 29 is arranged to monitor the air pressure in the tank body 1. When the air pressure is too high, the exhaust gas will be discharged through the opened third one-way electromagnetic valve 30, and the exhaust gas is filtered by the air filter element 33 and the filter screen 34.

[0040] The side of the tank body 1 is fixed with a support 47 for placing the nitrogen tank 13, and the side of the tank body 1 is also fixed with a positioning ring 25, the inner dimension of each positioning ring 25 matches the outer dimension of the nitrogen tank 13, and the nitrogen tank 13 is placed through the cooperation of the support 47 and the positioning ring 25.

[0041] The utility model is not limited to the above-mentioned embodiment, any person should know the structural change made under the inspiration of the utility model, any technical scheme with the same or similar utility model falls into the protection scope of the utility model. The utility model is not described in detail, and the technical, shape and structure parts are known technology.

Claims

1. A bottom-sprinkled slag material refining molten steel device including a tank body (1), a main stirring rod (3), an auxiliary stirring rod (4), a nitrogen tank (13), and a slag material tank (9), characterized by, The upper end of the tank body (1) is provided with a cover plate (2), a reserved hole for installing a main stirring rod (3) is formed in the middle of the cover plate (2), the reserved hole and the main stirring rod (3) are connected through a sealing bearing, the bottom of the main stirring rod (3) is communicated with auxiliary stirring rods (4) on both sides, unidirectional discharge nozzles (5) for discharging slag powder are arranged at equal intervals on the outer surface of the auxiliary stirring rods (4), the upper end of the main stirring rod (3) is communicated with a three-way pipe (7) through a rotary joint (6); The feeding end of the three-way pipe (7) is communicated with a first one-way electromagnetic valve (8), the other end of the first one-way electromagnetic valve (8) is communicated with the bottom of a slag tank (9), the top end of the three-way pipe (7) is communicated with a second one-way electromagnetic valve (10), the second one-way electromagnetic valve (10) is communicated with the gas conveying end of a gas pump (11) through a pipeline, and the negative pressure end of the gas pump (11) is communicated with the exhaust end of a valve at the top of a nitrogen tank (13) through a negative pressure pipe (12). The outer part of the upper end of the main stirring rod (3) is fixedly sleeved with a driven gear (15) engaged with a driving gear (14), the driving gear (14) is fixedly sleeved on the outer part of the output shaft of a motor (16), the upper end of one side of the tank body (1) is provided with a liquid inlet electromagnetic valve (17) for molten steel to enter, and the bottom of the tank body (1) is communicated with a liquid outlet electromagnetic valve (18) for discharging molten steel.

2. A bottom-sprinkled slag material refining molten steel device according to claim 1, characterized in that, Both ends of the cover plate (2) are hinged to T-shaped rods (20) through sleeve blocks (19), the vertical end of the T-shaped rod (20) is provided with screw threads matched with a nut (21) on the outer part, and the vertical end of the T-shaped rod (20) is located in a limiting groove (22) formed on both sides of the upper end of the tank body (1), and the bottom of the cover plate (2) is fixedly provided with a sealing ring (23), and the bottom surface of the sealing ring (23) is in contact with the top surface of the tank body (1).

3. A bottom-sprinkled slag material refining molten steel device according to claim 1, characterized in that, The outer side of the upper end of the main stirring rod (3) is further sleeved with a supporting ring (24), the supporting ring (24) is arranged below the driven gear (15), and the supporting ring (24) is located in a ring-shaped part (26) at the top of the cover plate (2), the inside of the ring-shaped part (26) is provided with a ball (27), and the ball (27) is located between the supporting ring (24) and the cover plate (2).

4. A bottom-sprinkled slag material refining molten steel device according to claim 1, characterized in that, One side of the upper end of the cover plate (2) is respectively provided with an exhaust pipe (28) and an air pressure gauge (29), the upper end of the exhaust pipe (28) is communicated with a third one-way electromagnetic valve (30), the exhaust end of the third one-way electromagnetic valve (30) is externally threadedly connected with a filter cover (31), the plug-in end of the filter cover (31) is externally provided with a sealing element (32) abutting against the inner wall of the exhaust end, a reserved hole for gas to enter is formed in the plug-in end of the filter cover (31), the plug-in end of the filter cover (31) is internally provided with an air filter element (33), a through hole for installing a filter screen (34) is formed in the top of the filter cover (31), and the filter screen (34) is located above the air filter element (33).

5. A bottom-sprinkled slag material refining molten steel device according to claim 1, wherein The upper end of the cover plate (2) is fixed with a first support (35), and the side of the first support (35) is fixed with a limiting ring (36). The limiting ring (36) is fixed with the slag tank (9) through a limiting bolt (37) at the front end. The upper end of the slag tank (9) is hingedly connected with a top cover (38). The other side of the top cover (38) is fixed with the slag tank (9) through a screw. The top of the top cover (38) is fixed with a controller (39).

6. A bottom-sprinkled slag material refining molten steel device according to claim 5, wherein The lower end of the top cover (38) is fixed with a base block (40) at equal intervals. The lower end of each base block (40) is connected with an auxiliary rod (42) through a spring (41). The top end of the auxiliary rod (42) is internally fixed with a micro vibration motor (43). The micro vibration motor (43) is sequentially penetrated through the auxiliary rod (42), the base block (40) and the top of the cover plate (2) through wires and is connected with the controller (39) circuit. The outside of the spring (41) is sleeved with a telescopic sleeve (44). The upper and lower ends of the telescopic sleeve (44) are fixed with the base block (40) and the auxiliary rod (42), respectively.

7. A bottom-sprinkled slag material refining molten steel device according to claim 1, wherein The upper end of the cover plate (2) is fixed with a machine box (46) for placing a motor (16) through a second support (45). The top of the machine box (46) is fixed with a bottom bracket of an air pump (11). The bottom of the machine box (46) is provided with a gap hole for penetrating the output shaft of the motor (16).

8. A bottom-sprinkled slag material refining molten steel device according to claim 1, wherein The side of the tank body (1) is fixed with a support bracket (47) for placing a nitrogen tank (13). The side of the tank body (1) is also fixed with a positioning ring (25). The inner dimension of each positioning ring (25) matches the outer dimension of the nitrogen tank (13).

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