CN112159883A

CN112159883A - LF refining device

Info

Publication number: CN112159883A
Application number: CN202011025091.6A
Authority: CN
Inventors: 高�浩; 吴龙; 黄标彩; 张璐; 邱思杰
Original assignee: Sanming University
Current assignee: Sanming University
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-01-01
Anticipated expiration: 2040-09-25
Also published as: CN112159883B

Abstract

The invention discloses an LF refining device which mainly comprises a base, a stirring motor, an insulating sleeve, a material selector and an insertion pipe, wherein front and back symmetrical telescopic cylinders are fixedly installed at the top end of a bottom plate, supporting plates are fixedly installed at the top ends of the telescopic cylinders, an edge ring is fixedly installed between the front and back symmetrical supporting plates, and a turntable is rotatably installed in the middle of the inner side of the edge ring. The invention has reasonable structural design, the material feeding path is simpler and more convenient through the arrangement of the material selector, the structure is compact, the control is convenient, the free material selection and the material feeding are realized, the rapid material feeding is ensured by matching with a gas carrier, and the stirring and mixing are carried out during the material feeding through the stirring structure, so the smelting efficiency is improved, the refining time is shortened, and the energy is saved; meanwhile, the alloying filler is fed by pneumatically matching with the powder alloy, so that the feeding is convenient, the melting rate is high, and the production rhythm and the alloy yield are ensured.

Description

LF refining device

Technical Field

The invention relates to refining equipment, in particular to an LF refining device.

Background

The LF has the functions of alloying of molten steel, deep desulfurization, impurity removal, temperature rise, molten steel component and temperature uniformity and the like, is flexible in smelting period, is an effective buffering link for steelmaking and continuous casting, and is widely used by most steel mills. At present, more than 90 percent of steel types need to be refined by LF, and particularly, the LF for low-sulfur steel and alloy steel is very convenient to refine, and the molten steel refining effect is good. When deep desulfurization is carried out by traditional LF, desulfurizing agents such as lime and the like are usually added for slagging, and electrodes are utilized for heating and slagging to form better desulfurization slag, and then argon blowing stirring is utilized for desulfurization. In addition, the alloying function of the traditional LF is to add blocky alloy into a steel ladle by using a storage bin to carry out molten steel alloying.

During alloying, because the alloy is directly contacted with the atmosphere at high temperature and needs to penetrate through a slag layer to enter molten steel, the alloy inevitably forms oxidation, so that the alloy yield is low, because the lumpiness is large and the melting point is high, the alloy is formed in the molten steel in a melting mode, and because the melting rate is low, the production rhythm and the alloy yield are influenced; the LF needs longer refining time for slagging, so that the smelting time is long, the power consumption and the electrode consumption are high, and the production cost is increased; the feeding equipment of the equipment has dispersed structure, large occupied space, complex pipeline, complex control and inconvenient use.

Disclosure of Invention

The invention aims to provide an LF refining device to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

an LF refining device mainly comprises a base, a stirring motor, an insulating sleeve, a material selector and an insertion tube, wherein front and back symmetrical telescopic cylinders are fixedly installed at the top end of a bottom plate, a supporting plate is fixedly installed at the top end of the telescopic cylinders, edge rings are fixedly installed between the supporting plates and are symmetrical front and back, a rotary disc is rotatably installed in the middle of the inner side of each edge ring, the insulating sleeve is fixedly installed in the rotary disc in a penetrating mode, the insertion tube is fixedly installed at the inner side of the insulating sleeve, a steel ladle is installed between the bottom plate and the edge rings in a pressing mode, symmetrically-arranged guide frames are fixedly installed on the front and back side walls of the edge rings, bilaterally-symmetrical supports are fixedly installed at the top end edge of each edge ring, side plates are fixedly installed between the supports, a discharge tube is fixedly installed at the top end of an electrode, the top end of the connecting plate is fixedly provided with a relay shell, the inside of the connecting plate is provided with an opening matched with the relay shell, the outer side of the triangular seat is fixedly provided with a separation blade matched with the opening, the relay shell is communicated with the discharging pipe through the opening in the connecting plate, the middle part of the top end of the rotary table is fixedly provided with a middle shaft, the middle shaft penetrates through the connecting plate to be connected in a rotating manner, the upper part of the middle shaft is fixedly provided with a belt pulley, the side wall of the relay shell is provided with a belt passing port matched with the belt pulley, the middle part of the side plate is fixedly provided with a stirring motor, the stirring motor is meshed with the belt pulley through a belt, the top end of the support frame is fixedly provided with a top plate, the top end of the top plate is fixedly provided with symmetrically arranged feeding tanks, the, the middle of the top plate is provided with an air supply pipe in a penetrating and fixed mode, and the bottom end of the air supply pipe is fixedly connected with the side wall of the top end of the material selecting device in a penetrating and fixed mode.

As a further scheme of the invention: the material selector mainly comprises an outer frame, a motor shell, a top seat, a guide shell, an outer toothed ring, an angle sensor, a sealing ring, a reversing motor, a sealing ring and a wind collecting shell, wherein the top end of the outer frame is fixedly connected with an air supply pipe, the top seat is fixedly arranged at the upper part of the inner side of the outer frame, the guide shell is rotatably arranged at the inner side of the outer frame, a limiting ring matched with the guide shell is fixedly arranged at the middle part of the inner side of the outer frame, the top end of the guide shell is in rotating contact with the bottom end of the top seat, the wind collecting shell is fixedly arranged at the middle part of the bottom end of the top seat, a feed port is formed in the side wall of the guide shell, the sealing ring is fixedly arranged at the feed port, the outer toothed ring is fixedly arranged on the outer wall of the lower part of the guide shell, the reversing motor is fixedly, the frame inboard right part fixed mounting have with outer ring gear complex angle sensor, the discharge gate has been seted up to the frame bottom, the frame bottom is located discharge gate department fixed connection relay shell, frame bottom lateral wall is connected with the axis rotation.

As a still further scheme of the invention: the inserting pipe mainly comprises an electrode pipe and an inner pipe, the inner pipe is fixedly arranged on the inner side of the electrode pipe, the outer wall of the electrode pipe is fixedly connected with the inner wall of the insulating sleeve, and the electrode pipe is inserted into the inner side of the steel ladle.

As a still further scheme of the invention: the lead frame bottom is provided with the cone head, the inboard edge of base runs through fixed mounting have with lead frame complex socket, the socket opening upwards and inside shape is unanimous with the lead frame appearance.

As a still further scheme of the invention: the top end of the feeding tank is connected with a sealing cover in a rotating mode, and the feeding tanks are fixedly connected through reinforcing rings.

As a still further scheme of the invention: the gas supply pipe is communicated with external gas supply equipment through a pipeline, and the external gas supply equipment provides inert gas.

As a still further scheme of the invention: the telescopic cylinder is fixedly communicated with external pneumatic control equipment through a pipeline, the stirring motor, the feeding valve, the angle sensor and the reversing motor are electrically connected with an external power supply and the external control equipment through a wiring harness, and the electrode tube is electrically connected with an external low-voltage high-current three-phase power supply through an electrode holder.

Compared with the prior art, the invention has the beneficial effects that:

the invention has reasonable structural design, the material feeding path is simpler and more convenient through the arrangement of the material selector, the structure is compact, the control is convenient, the free material selection and the material feeding are realized, the rapid material feeding is ensured by matching with a gas carrier, and the stirring and mixing are carried out during the material feeding through the stirring structure, so the smelting efficiency is improved, the refining time is shortened, and the energy is saved; meanwhile, the alloying filler is fed by pneumatically matching with the powder alloy, so that the feeding is convenient, the melting rate is high, and the production rhythm and the alloy yield are ensured.

Drawings

Fig. 1 is a schematic structural view of an LF refining apparatus.

FIG. 2 is an enlarged schematic view of the middle of the top view of the LF refining apparatus.

Fig. 3 is a schematic top view of the lower half of the LF refining apparatus.

FIG. 4 is a schematic bottom view of the upper half of the LF refining apparatus.

Fig. 5 is a schematic top view of the LF refining apparatus between the rotating disc, the triangular base, the baffle plate and the relay housing.

Fig. 6 is a schematic cross-sectional view of the LF refining apparatus between the outer frame, the wind-collecting housing, the guide housing, the commutation motor, and the relay housing.

FIG. 7 is an enlarged schematic view of the LF refining apparatus between the side ring, the turntable, the support, the electrode tube, the inner tube and the ladle.

Fig. 8 is a schematic front view of the outer frame, the relay shell, the adapter sleeve, the triangular seat and the middle shaft of the LF refining device.

In the figure: the device comprises a base 1, a socket 2, a steel ladle 3, a telescopic cylinder 4, a guide frame 5, a side ring 6, a stirring motor 7, a side plate 8, an air supply pipe 9, a top plate 11, a feeding tank 12, an electrode pipe 13, an insulating sleeve 14, a baffle plate 15, a feeding valve 16, a support 17, an outer frame 18, a rotary table 19, a middle shaft 20, a support plate 21, an inner pipe 22, a relay shell 23, a triangular seat 24, a limiting block 25, an adapter sleeve 26, a motor shell 27, a top seat 28, a guide shell 29, an outer toothed ring 30, an angle sensor 31, a sealing ring 32, a reversing motor 33, a sealing ring 34, an air collecting shell 35, a connecting plate 36, a belt pulley 38, a feeding pipe 39 and.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 8, in the embodiment of the invention, an LF refining device mainly includes a base 1, a stirring motor 7, an insulating sleeve 14, a material selector and an insertion tube, wherein a front and a back symmetrical telescopic cylinder 4 is fixedly installed at the top end of the base 1, a support plate 21 is fixedly installed at the top end of the telescopic cylinder 4, a side ring 6 is fixedly installed between the front and the back symmetrical support plates 21, a turntable 19 is rotatably installed at the middle part of the inner side of the side ring 6, the insulating sleeve 14 is fixedly installed in the turntable 19 in a penetrating manner, the insertion tube is fixedly installed at the inner side of the insulating sleeve 14, a steel ladle 3 is installed between the base 1 and the side ring 6 in a compression joint manner, symmetrically arranged guide frames 5 are fixedly installed at the front and the back side walls of the side ring 6, bilaterally symmetrical brackets 17 are fixedly installed at the top end edge of the side ring 6, a side, a limiting block 25 is fixedly installed on the outer side of the triangular seat 24, an adapter sleeve 26 is rotatably installed on the outer side of the limiting block 25, a connecting plate 36 is fixedly installed on the upper portion of the inner side of the adapter sleeve 26, a relay shell 23 is fixedly installed at the top end of the connecting plate 36, an opening matched with the relay shell 23 is formed in the connecting plate 36, a baffle sheet 15 matched with the opening is fixedly installed on the outer side of the triangular seat 24, the relay shell 23 is communicated with a discharge pipe 40 through the opening in the connecting plate 36, a middle shaft 20 is fixedly installed in the middle of the top end of the rotary table 19, the middle shaft 20 penetrates through the connecting plate 36 in a rotating mode and is connected with the connecting plate 20, a belt pulley 38 is fixedly installed on the upper portion of the middle shaft 20, a belt passing opening matched with the belt pulley 38 is formed in the side wall of the relay shell 23, an agitating motor 7 is fixedly installed, feed tank 12 bottom end opening part fixed mounting has feed valve 16, and feed valve 16 bottom fixed mounting has feed pipe 39, feed pipe 39 bottom fixed connection selecting glassware, selecting glassware bottom fixed connection relay shell 23, roof 11 middle part is run through fixed mounting and is had air supply pipe 9, and air supply pipe 9 bottom and selecting glassware top lateral wall run through fixed connection.

The material selector mainly comprises an outer frame 18, a motor shell 27, a top seat 28, a guide shell 29, an outer toothed ring 30, an angle sensor 31, a sealing ring 32, a reversing motor 33, a sealing ring 34 and an air collecting shell 35, wherein the top end of the outer frame 18 is fixedly connected with an air supply pipe 9, the top seat 28 is fixedly installed on the upper portion of the inner side of the outer frame 18, the guide shell 29 is rotatably installed on the inner side of the outer frame 18, a limiting ring matched with the guide shell 29 is fixedly installed in the middle of the inner side of the outer frame 18, the top end of the guide shell 29 is in rotary contact with the bottom end of the top seat 28, the air collecting shell 35 is fixedly installed in the middle of the bottom end of the top seat 28, a feed port is formed in the side wall of the guide shell 29, the sealing ring 34 is fixedly installed at the feed port of the guide shell 29, the outer toothed ring 30 is fixedly installed on the outer wall, the outer wall of the lower part of the guide shell 29 is fixedly provided with a sealing ring 32, the outer wall of the sealing ring 32 is in sliding contact with the inner wall of the outer frame 18, the right part of the inner side of the outer frame 18 is fixedly provided with an angle sensor 31 matched with the outer gear ring 30, the bottom end of the outer frame 18 is provided with a discharge hole, the bottom end of the outer frame 18 is fixedly connected with the relay shell 23 at the discharge hole, and the side wall of the bottom end of the outer frame 18 is rotatably.

The insertion tube mainly comprises an electrode tube 13 and an inner tube 22, the inner side of the electrode tube 13 is fixedly provided with the inner tube 22, the outer wall of the electrode tube 13 is fixedly connected with the inner wall of the insulating sleeve 14, and the electrode tube 13 is inserted into the inner side of the steel ladle 3.

The bottom of the guide frame 5 is provided with a conical head, the edge of the inner side of the base 1 is provided with a socket 2 matched with the guide frame 5 in a penetrating and fixed mode, the opening of the socket 2 is upward, and the shape of the inner portion of the socket is consistent with the shape of the guide frame 5.

The top end of the feeding tank 12 is rotatably provided with a sealing cover, and the feeding tank 12 is fixedly connected through a reinforcing ring.

The gas supply pipe 9 is conducted with an external gas supply device through a pipe, and the external gas supply device supplies inert gas.

The telescopic cylinder 4 is fixedly communicated with external pneumatic control equipment through a pipeline, the stirring motor 7, the feeding valve 16, the angle sensor 31 and the reversing motor 33 are electrically connected with an external power supply and the external control equipment through a wiring harness, and the electrode tube 13 is electrically connected with an external low-voltage high-current three-phase power supply through an electrode holder.

The working principle of the invention is as follows:

the invention relates to an LF refining device, which is used for refining and processing, wherein various powdery materials are prestored in a feeding tank 12, such as additives for desulfurization and alloy powder for alloying;

when deep desulfurization is carried out, inert gas is supplied through the gas supply pipe 9, the inert gas serves as a feeding carrier, the reversing motor drives the guide shell to rotate, so that the sealing ring 32 is communicated with the bottom end opening of the feeding pipe 39, the feeding is required to be fed, the feeding pipe 39 is communicated with the guide shell 39, the rotation angle detection is carried out through the angle sensor, the rotation number of turns of the reversing motor is controlled by matching with external control equipment, accurate material selection and feeding are realized, in a mixing position of the inert gas carrier and powder, a material selector, through the matching of the air collecting shell and the guide shell, the powder can enter the insertion pipe to feed under the gravity and wind blowing guide flow, in addition, the rotating disc can be driven to rotate by the stirring motor during feeding, molten steel stirring in the steel ladle is carried out through the insertion pipe, the electrode pipe is matched with electrifying, desulfurization refining is carried out, and the stirring, the smelting efficiency is improved, the refining time is shortened, and the electric power energy is saved;

guarantee the safety of reaction simultaneously, can compress tightly limit ring and ladle through the telescoping cylinder, and carry out the alloy powder feed through inert gas, when inside atmospheric pressure was too high, can overflow from the gap, inert gas rushes out the inside air of ladle, will avoid the ladle inside to have a large amount of air, can avoid under high temperature alloy powder direct with the oxidizing gas contact in the atmosphere, powdered alloy self is small simultaneously, the feed is convenient, melt rate is fast, guarantee production rhythm and alloy yield.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An LF refining device mainly comprises a base (1), a stirring motor (7), an insulating sleeve (14), a material selector and an insertion tube, and is characterized in that front and back symmetrical telescopic cylinders (4) are fixedly mounted at the top end of the base plate (1), supporting plates (21) are fixedly mounted at the top ends of the telescopic cylinders (4), edge rings (6) are fixedly mounted between the supporting plates (21) in front and back symmetry, a rotary table (19) is rotatably mounted in the middle of the inner side of each edge ring (6), the insulating sleeve (14) is fixedly mounted in the rotary table (19) in a penetrating manner, the insertion tube is fixedly mounted on the inner side of each insulating sleeve (14), steel ladles (3) are mounted between the base plate (1) and the edge rings (6) in a pressing and connecting manner, symmetrically arranged guide frames (5) are fixedly mounted on the front and back side walls of the edge rings (6), and, side plates (8) are fixedly mounted between supports (17), a discharge pipe (40) is fixedly mounted at the top end of an electrode pipe (13), a triangular seat (24) is fixedly mounted at the top end of the discharge pipe (40), a limiting block (25) is fixedly mounted at the outer side of the triangular seat (24), an adapter sleeve (26) is rotatably mounted at the outer side of the limiting block (25), a connecting plate (36) is fixedly mounted at the upper part of the inner side of the adapter sleeve (26), a relay shell (23) is fixedly mounted at the top end of the connecting plate (36), an opening matched with the relay shell (23) is formed in the connecting plate (36), a separation blade (15) matched with the opening is fixedly mounted at the outer side of the triangular seat (24), the relay shell (23) is communicated with the discharge pipe (40) through the inner opening of the connecting plate (36), a middle shaft (20) is fixedly mounted at the middle part, a belt pulley (38) is fixedly installed at the upper part of the middle shaft (20), a belt passing port matched with the belt pulley (38) is formed in the side wall of the relay shell (23), the middle part of the side plate (8) is fixedly provided with a stirring motor (7), the stirring motor (7) is meshed and connected with a belt pulley (38) through a belt, the top end of the support (17) is fixedly provided with a top plate (11), the top end of the top plate (11) is fixedly provided with symmetrically arranged feeding tanks (12), the opening at the bottom end of each feeding tank (12) is fixedly provided with a feeding valve (16), the bottom ends of the feeding valves (16) are fixedly provided with feeding pipes (39), the bottom ends of the feeding pipes (39) are fixedly connected with a material selector, the material selecting device bottom end is fixedly connected with the relay shell (23), the middle of the top plate (11) is provided with an air supply pipe (9) in a penetrating and fixed mode, and the bottom end of the air supply pipe (9) is fixedly connected with the side wall of the top end of the material selecting device in a penetrating and fixed mode.

2. The LF refining device according to claim 1, wherein the material selector mainly comprises an outer frame (18), a motor casing (27), a top seat (28), a guide casing (29), an outer toothed ring (30), an angle sensor (31), a sealing ring (32), a reversing motor (33), a sealing ring (34) and a wind-collecting casing (35), the top end of the outer frame (18) is fixedly connected with the air supply pipe (9), the top seat (28) is fixedly installed on the upper portion of the inner side of the outer frame (18), the guide casing (29) is rotatably installed on the inner side of the outer frame (18), a limiting ring matched with the guide casing (29) is fixedly installed in the middle of the inner side of the outer frame (18), the top end of the guide casing (29) is rotatably contacted with the bottom end of the top seat (28), the wind-collecting casing (35) is fixedly installed in the middle of the bottom end of the top seat (28), a feed port is opened on the side wall of the guide casing (29), the sealing, lead shell (29) lower part outer wall fixed mounting have outer ring gear (30), frame (18) left side is run through fixed mounting and is had switching-over motor (33), and switching-over motor (33) are connected through rack and outer ring gear (30) meshing, lead shell (29) lower part outer wall fixed mounting have sealing ring (32), sealing ring (32) outer wall and frame (18) inner wall sliding contact, frame (18) inboard right part fixed mounting have with outer ring gear (30) complex angle sensor (31), the discharge gate has been seted up to frame (18) bottom, frame (18) bottom is located discharge gate department fixed connection relay shell (23), frame (18) bottom lateral wall rotates with axis (20) and is connected.

3. The LF refining device according to claim 1, wherein the insertion tube mainly comprises an electrode tube (13) and an inner tube (22), the inner tube (22) is fixedly installed on the inner side of the electrode tube (13), the outer wall of the electrode tube (13) is fixedly connected with the inner wall of the insulating sleeve (14), and the electrode tube (13) is inserted into the inner side of the ladle (3).

4. The LF refining device according to the claim 1, characterized in that the bottom of the guide frame (5) is provided with a conical head, the inner side edge of the base (1) is fixedly provided with a socket (2) matched with the guide frame (5) in a penetrating way, the opening of the socket (2) is upward, and the inner shape of the socket is consistent with the appearance of the guide frame (5).

5. The LF refining apparatus according to claim 1, wherein the top end of the supply tank (12) is screwed with a sealing cover, and the supply tank (12) is fixedly connected with each other through a reinforcing ring.

6. The LF refining plant according to claim 1, characterized in that the gas supply tube (9) is in communication with an external gas supply device through a pipe, the external gas supply device providing an inert gas.

7. The LF refining apparatus according to claim 1, wherein the telescopic cylinder (4) is fixedly connected with an external pneumatic control device through a pipeline, the stirring motor (7), the supply valve (16), the angle sensor (31) and the reversing motor (33) are electrically connected with an external power supply and the external control device through a wiring harness, and the electrode tube (13) is electrically connected with an external low-voltage high-current three-phase power supply through an electrode holder.