CN214694316U

CN214694316U - Slag-avoiding and tapping device of three-phase lining electroslag furnace and smelting system

Info

Publication number: CN214694316U
Application number: CN202023275317.6U
Authority: CN
Inventors: 郑晓丹; 李亚南; 王志强
Original assignee: BEIJING SHOUGANG GITANE NEW MATERIALS CO LTD
Current assignee: BEIJING SHOUGANG GITANE NEW MATERIALS CO LTD
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-11-12
Anticipated expiration: 2030-12-29

Abstract

The utility model discloses a slag tapping device and smelting system are kept away to three-phase lined electroslag furnace relates to casting equipment technical field, has solved among the prior art three-phase lined electroslag furnace open furnace mouth department slag-liquid separation's technical problem. The furnace comprises a furnace body, a tilting mechanism and a furnace carriage, wherein the furnace body is provided with an open furnace nozzle, the open furnace nozzle comprises a bottom plate and two side plates, a slag baffle is welded between the two side plates, a liquid passing port is formed between the slag baffle and the bottom plate, one end of the tilting mechanism is fixedly connected with the furnace carriage, and the other end of the tilting mechanism is rotatably connected with the furnace body. The slag blocking plate is welded on the open furnace mouth of the three-phase lining electroslag furnace, the slag on the upper part of the molten steel surface is blocked in the tapping process by utilizing the density difference between the slag and the molten steel, the molten steel passes through the liquid passing hole and flows out of the furnace mouth, the mode of first discharging the molten steel and then discharging the slag is realized, and the problem of mixing the steel slag of the three-phase lining electroslag furnace is solved.

Description

Slag-avoiding and tapping device of three-phase lining electroslag furnace and smelting system

Technical Field

The utility model relates to a casting equipment technical field especially relates to a slag tapping device and system of smelting are kept away to three-phase lined electroslag furnace.

Background

The three-phase lined electroslag furnace is a common open type open hearth furnace, an open type furnace mouth for steel tapping is arranged on the side wall position of an upper furnace mouth, steel slag is arranged on the upper portion of the molten steel surface produced by smelting, and the steel slag is less in density than the molten steel in the steel tapping process, so that the steel slag cannot be separated when the molten steel is poured into a steel ladle, and the steel slag is mixed out.

At present, most of slag avoiding modes used in large steel plants are slag raking, slag stopping balls, runner slag stopping plates and the like, and are not suitable for a three-phase lined electroslag furnace with an open furnace mouth. The smelting molten steel is mixed with the steel slag, so that the easily-oxidized elements added into the steel ladle are contacted with the steel slag, the alloy raw materials are wasted after the steel slag is severely burnt, the high-temperature steel slag is gathered to scour the wall of the steel ladle during steel tapping, the refractory materials in the steel ladle are seriously eroded, and improvement is needed.

SUMMERY OF THE UTILITY MODEL

The application provides a slag-avoiding and tapping device of a three-phase lining electroslag furnace, and solves the technical problem of slag-liquid separation at an open furnace mouth of the three-phase lining electroslag furnace in the prior art.

The application provides a slag tapping device is kept away to three-phase lined electroslag furnace, including furnace body, tilting mechanism and stove car, the furnace body is equipped with open furnace mouth, and open furnace mouth includes bottom plate and two blocks of curb plates, and the welding has the slag trap between two blocks of curb plates, is equipped with the liquid mouth of crossing between slag trap and the bottom plate, tilting mechanism one end and stove car fixed connection, and the other end rotates with the furnace body to be connected.

Preferably, the slag trap comprises a transverse blocking part arranged between the two side plates and a protruding part extending out of the open furnace mouth.

Preferably, the extension portion includes horizontal part and two vertical portions that the level was arranged, and two vertical portions are fixed connection respectively in the horizontal both ends of horizontal part, and the horizontal part strides locates two curb plates and welds with the curb plate, and vertical portion welds with the vertical outer wall of curb plate.

Preferably, the bottom plate is distributed along the horizontal direction, the transverse blocking part is arranged between the two side plates along the inclined direction, the transverse blocking part is welded with the inner walls of the side plates, and a liquid passing port is arranged between the transverse blocking part and the bottom plate.

Preferably, the vertical part is arranged in a triangular shape, and the triangular side wall of the vertical part is welded with the vertical outer wall of the side plate.

Preferably, the major structure of slag trap is the steel sheet setting, and the steel sheet welds with the curb plate, and the slag trap is still including the flame retardant coating that covers the steel sheet setting.

Preferably, the refractory layer is built up of refractory bricks.

Preferably, the refractory layer is built up from high alumina bricks.

Preferably, the vertical part is arranged in a fan shape, and the fan-shaped side wall of the vertical part is welded with the vertical outer wall of the side plate.

A smelting system comprises the slag-avoiding and tapping device of the three-phase lined electroslag furnace.

The beneficial effect of this application is as follows: the slag-blocking plate is welded aiming at an open furnace mouth of the three-phase lined electroslag furnace, the slag on the upper part of the molten steel surface is blocked in the tapping process by utilizing the density difference between the slag and the molten steel, the molten steel passes through the liquid passing hole and flows out of the furnace mouth, the mode of discharging the slag after the molten steel is discharged first is realized, the problem of mixing the steel slag of the three-phase lined electroslag furnace is solved, the direct contact between easily oxidized alloy elements and high-temperature slag is reduced, the burning loss is reduced, the phenomenon that the steel slag is mixed into the molten steel is effectively improved, and the service life of a steel ladle is prolonged.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.

FIG. 1 is a schematic view of a prior art open hearth nozzle provided herein;

FIG. 2 is a schematic structural view of an open tuyere-mounted slag trap provided herein;

FIG. 3 is a schematic view of the three-phase lined electroslag furnace provided by the present application;

FIG. 4 is a cross-sectional view of a slag trap provided herein;

fig. 5 is a schematic structural diagram of fig. 4 from another view angle.

The attached drawings are marked as follows: 100-furnace body, 200-open furnace mouth, 210-cavity channel, 300-slag trap, 310-transverse blocking part, 311-liquid passing port, 320-extending part, 321-horizontal part, 322-vertical part, 400-tilting mechanism and 500-furnace vehicle.

Detailed Description

The embodiment of the application solves the technical problem of slag-liquid separation at the open furnace mouth 200 of the three-phase lining electroslag furnace in the prior art by providing the slag-avoiding and tapping device of the three-phase lining electroslag furnace.

In order to solve the technical problems, the general idea of the embodiment of the application is as follows:

the utility model provides a three-phase lined electroslag furnace keeps away sediment steel tapping device, includes furnace body 100, tilting mechanism 400 and stove car 500, and furnace body 100 is equipped with open furnace mouth 200, and open furnace mouth 200 welds slag trap 300, and slag trap 300 is horizontal in open furnace mouth 200's chamber way 210, and the lower limb of slag trap 300 encloses with the inner wall of open furnace mouth 200 and closes and form and cross liquid mouth 311, and tilting mechanism 400 one end and stove car 500 fixed connection, and the other end rotates with furnace body 100 and is connected.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

Referring to fig. 1 to 5, fig. 3 is a schematic view of a main structure of a three-phase lined electroslag furnace, and fig. 1 is a schematic view of an open furnace mouth 200 of a three-phase lined electroslag furnace in the prior art.

Referring to fig. 2, in the present embodiment, a slag trap 300 is welded to the open tuyere 200, using the density difference between slag and molten steel. The slag trap 300 is fixed to the open tuyere 200 in a welding manner, is stably connected, and still has good stability in a high-temperature working environment, and the welding manner can withstand a large fluid impact force and a high-temperature working environment, thereby having a prominent effect.

The slag trap 300 is transversely disposed in the open tuyere 200, specifically, partially or completely disposed in the channel 210 of the tuyere, the slag trap 300 is disposed in the upper half of the channel 210, and the lower edge of the slag trap 300 is engaged with the inner wall of the channel 210 of the open tuyere 200 to form a liquid passing port 311. Referring to fig. 2, the open-type furnace mouth includes a bottom plate and two side plates, a slag trap is welded between the two side plates, and a liquid passing port is formed between the slag trap and the bottom plate.

The integral device also comprises a plurality of main parts of the three-phase lining electroslag furnace, including a furnace body 100, a tilting mechanism 400 and a furnace carriage 500, wherein the open furnace nozzle 200 is arranged at the top side position of the furnace body 100, the furnace carriage 500 is convenient for the operation of the integral device, the lower end of the tilting mechanism 400 is fixed on the furnace carriage 500, and the upper end of the tilting mechanism 400 is rotatably connected with the furnace body 100. The tilting mechanism 400 operates to rotate the furnace body 100, so that the molten steel in the furnace body 100 flows out from the open tuyeres 200. When the molten steel flows to the slag trap 300, the molten steel flows through the liquid passing port 311, and the slag trap 300 separates slag above the molten steel, so that the molten steel is separated from the slag.

Therefore, the mode of first discharging molten steel and then discharging slag is realized, the problem of mixing the steel slag of the three-phase lining electroslag furnace is solved, the direct contact between easily-oxidized alloy elements and high-temperature slag is reduced, and the burning loss is reduced; and effectively improve the condition that the steel slag is mixed into the molten steel, prolong the service life of the steel ladle and reduce the high-temperature erosion corrosion to the wall of the steel ladle.

Preferably, the main body of the slag trap 300 is in the form of a steel plate, welded to the sidewall of the open burner 200, and then covered with a refractory layer, thereby improving the fire resistance of the slag trap 300. The temperature of the molten steel is preferably over 1700 ℃, for example, the fire-resistant layer can be formed by stacking fire-resistant mud or high alumina mud to form a fire-resistant brick layer or a high alumina brick layer. The fire-resistant layer can also be formed by stably attaching other fire-resistant materials which can resist the high temperature of more than 1700 ℃ to the surface of the steel plate.

Preferably, the refractory layer is also arranged to cover the welding position of the steel plate and the open furnace nozzle 200, so as to protect the stability of the welding position.

The main part of the slag trap 300 in the embodiment adopts a steel plate, so that a large amount of waste steel on site can be utilized, and the material taking is simple. In more practical embodiments, the steel plate can be replaced by other metal plates with high melting points.

Preferably, in order to improve the welding stability and the welding convenience of the slag trap 300 and the open tuyere 200, referring to fig. 4, the slag trap 300 includes a rail 310 and a protrusion 320, the rail 310 is located at a lower side, and the protrusion 320 is located at an upper side, which cooperate to increase the welding area of the slag trap 300 and the open tuyere 200.

Preferably, the extending portion 320 includes a horizontal portion 321 and a vertical portion 322 of two sections of the horizontal portion 321, and the vertical portion 322, the horizontal portion 321 and the rail portion 310 are fixedly connected in sequence, for example, they may be formed by cutting a single steel plate or by welding a plurality of steel plate strips. The horizontal portion 321 is disposed across the channel 210 of the open burner 200, and the vertical portion 322 is welded to the two outer vertical walls of the open burner 200, i.e., the vertical outer walls of the side plates. It should be noted that, referring to fig. 1 and fig. 2, two vertical side plates with two side plates close to each other are defined as vertical inner walls of the side plates, and two vertical side plates with two side plates away from each other are defined as vertical outer walls of the side plates.

When the slag trap 300 is installed on the open tuyere 200, the slag trap 300 is now clamped on the open tuyere 200, the contact surfaces of the slag trap 300 and the open tuyere 200 are welded, and after the welding is strengthened and stabilized, the refractory mortar and the like are piled up to form a refractory layer. Wherein the content of the first and second substances,

preferably, the channel 210 of the open tuyere 200 extends in a horizontal direction, the rail 310 is disposed in the channel 210 of the open tuyere 200 in an inclined direction and welded to an inner wall of the channel 210 of the open tuyere 200, and a liquid passing port 311 is formed by the lower side of the rail 310 and the inner wall of the open tuyere 200. The oblique direction is relative to the horizontal direction, and the oblique direction arrangement can increase the arrangement area of the rails 310, thereby increasing the welding stability, compared to the manner in which the rails 310 are arranged in the vertical direction.

Preferably, referring to fig. 5, in the slag trap 300, the vertical portion 322 may also be disposed in a triangular shape in fig. 5, and the triangular side wall thereof is welded to the vertical outer side wall of the open hearth 200. The triangle can be replaced by other shapes such as a sector, a regular polygon and the like. By the large cross-section arrangement, the welding area of the vertical portion 322 and the open hearth 200 side plate is increased.

The embodiment also provides a smelting system which comprises the slag-avoiding and tapping device of the three-phase lined electroslag furnace and solves the technical problem of slag-liquid separation at the open furnace mouth 200 of the three-phase lined electroslag furnace.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a three-phase lined electroslag furnace keeps away sediment tapping device which characterized in that includes:

the furnace body is provided with an open furnace mouth, the open furnace mouth comprises a bottom plate and two side plates, a slag trap is welded between the two side plates, and a liquid passing port is formed between the slag trap and the bottom plate;

the furnace body comprises a tilting mechanism and a furnace car, wherein one end of the tilting mechanism is fixedly connected with the furnace car, and the other end of the tilting mechanism is rotatably connected with the furnace body.

2. The slag and steel tapping device for a three-phase lined electroslag furnace as recited in claim 1, wherein said slag trap includes a rail portion disposed between two of said side plates, and a protrusion portion disposed to protrude from said open mouth.

3. The slag-avoiding tapping device for a three-phase lined electroslag furnace as claimed in claim 2, wherein the extending portion comprises a horizontal portion and two vertical portions, the horizontal portion and the two vertical portions are horizontally arranged, the two vertical portions are respectively and fixedly connected to two horizontal ends of the horizontal portion, the horizontal portion is spanned between and welded to the two side plates, and the vertical portions are welded to the vertical outer walls of the side plates.

4. The slag-avoiding and tapping device for the three-phase lined electroslag furnace as recited in claim 2, wherein the bottom plate is distributed along a horizontal direction, the cross stopping portion is arranged between the two side plates along an inclined direction, the cross stopping portion is welded with the inner walls of the side plates, and the liquid passing port is arranged between the cross stopping portion and the bottom plate.

5. The slag-avoiding tapping device for a three-phase lined electroslag furnace as recited in claim 3, wherein the vertical portion is formed in a triangular shape, and the triangular-shaped side wall thereof is welded to the vertical outer wall of the side plate.

6. The slag-avoiding tapping device for a three-phase lined electroslag furnace as recited in claim 1, wherein the main structure of the slag trap is a steel plate, the steel plate is welded to the side plate, and the slag trap further comprises a fire-resistant layer covering the steel plate.

7. The slag-avoiding tapping device for a three-phase lined electroslag furnace as recited in claim 6, wherein the refractory layer is formed by stacking refractory bricks.

8. The slag-avoiding tapping device for a three-phase lined electroslag furnace as recited in claim 6, wherein the refractory layer is formed by stacking high alumina bricks.

9. The slag-avoiding tapping device for a three-phase lined electroslag furnace as recited in claim 3, wherein the vertical portion is formed in a fan shape, and the fan-shaped side wall thereof is welded to the vertical outer wall of the side plate.

10. A smelting system, characterized by comprising the slag-avoiding tapping device for a three-phase lined electroslag furnace as recited in any one of claims 1 to 9.