CN115572788B

CN115572788B - Slag removing device for steel tapping hole of steelmaking converter

Info

Publication number: CN115572788B
Application number: CN202211221432.6A
Authority: CN
Inventors: 潘成; 张少博
Original assignee: Xinji Aosen Special Steel Group Co ltd
Current assignee: Xinji Aosen Special Steel Group Co ltd
Priority date: 2022-10-08
Filing date: 2022-10-08
Publication date: 2023-10-17
Anticipated expiration: 2042-10-08
Also published as: CN115572788A

Abstract

The slag removing device for the steel tapping hole of the steelmaking converter comprises a converter, a guard plate and a front furnace platform, and is characterized in that: the cooling pipe group is positioned at the tapping hole of the converter and consists of hard pipelines capable of circulating liquid with specific temperature, and the hard pipelines are distributed in an S shape; the cooling pipe group covers a region with steel slag falling on a furnace front platform; the furnace front platform below the cooling pipe group is also provided with a slag collecting groove; the furnace front platform is characterized by further comprising a sliding bar which can slide on the furnace front platform, a plurality of pressure heads are arranged on the sliding bar, the pressure heads can extend into the upper part of the S-shaped gap of the cooling tube set along with the sliding of the sliding bar, and after the sliding bar is stressed, the pressure heads can pass through the S-shaped gap to be pressed down. The scheme does not need an additional power mechanism, does not need automatic control, is suitable for a severe furnace mouth environment, has high reliability, has extremely simple structure, can be repaired and manufactured by a steel mill, and can not influence continuous production even if damaged.

Description

Slag removing device for steel tapping hole of steelmaking converter

Technical Field

The application relates to converter steelmaking equipment, in particular to a tap hole slag foaming device.

Background

Converter steelmaking refers to a process in which raw materials such as molten iron are injected into a converter, and then the converter is oxygenated to convert the molten iron into molten steel for steelmaking. After the molten steel is sintered, the converter is inclined by 90 degrees, the molten steel is injected into a ladle on a pre-furnace platform, the ladle is transferred into a subsequent process, and the converter is named as the converter. During molten steel rotation and raw material filling, some molten steel can be splashed near a steel tapping hole of the converter to form steel slag, and a furnace front platform is blocked after solidification, so that ladle transportation is affected.

The solidified steel slag has certain strength and toughness, is difficult to clean by common means, and has high temperature and extremely severe environment because the steel slag is close to an enclosed furnace, and waste heat and waste gas affect the cleaning operation of a stokehole worker. In the prior art, slag removing devices such as a converter platform disclosed in CN 110656216B are arranged, wherein a profile frame and a steel brush are adopted to clean steel slag; in addition, the development and application of a converter mouth cleaner for smelting plants, which is published in mining research and development, is recorded as a device for breaking steel slag by hydraulic impact and cleaning.

The main difficulties of steel slag cleaning are: the working condition of the furnace mouth is extremely bad, if an automatic device such as a hydraulic system is used, the failure rate of the device is high, the labor intensity of operators is high, meanwhile, the converter of a steel mill is generally manufactured integrally, and the cleaning device is difficult to install; in the other direction, the solidified steel slag can be regarded as an iron bar with poor quality, has larger strength and toughness, is not broken and is difficult to collect, but tools such as a hydraulic hammer in the prior art have large labor intensity and higher energy consumption; in addition, the converter can be used for discharging steel once in tens of minutes, slag removal work needs to be carried out in time, and the simplicity and reliability are required (faults are preferably easy to treat, because steel-making equipment cannot be stopped (damage to a production line is caused by solidification of molten steel after the steel is stopped), if a slag removal device is not easy to repair, production confusion is caused, and the transfer of a ladle is not influenced.

Disclosure of Invention

First technical problem

1. Designing a slag removing device which is simple enough but has enough destructive power to break up the steel slag;

2. the method meets the requirements of easy construction and continuous operation of a steel mill is not affected by self faults;

3. can be used for the civil layout of traditional steelworks and common stokehole platforms, and does not influence the existing ladle transferring flow.

(II) technical scheme

Aiming at the technical problems, the application provides a slag removal device for a steel tapping hole of a steelmaking converter, which comprises a converter, a guard plate and a front platform, and is characterized in that: the cooling pipe group is positioned at the tapping hole of the converter and consists of hard pipelines capable of circulating liquid with specific temperature, and the hard pipelines are distributed in an S shape; the cooling pipe group covers a region with steel slag falling on a furnace front platform; the furnace front platform below the cooling pipe group is also provided with a slag collecting groove;

the device comprises a furnace front platform, a cooling pipe set, a sliding row, a plurality of pressure heads, a plurality of cooling pipe sets and a cooling pipe set, wherein the sliding row can slide on the furnace front platform, the plurality of pressure heads are arranged on the sliding row, and can extend to the upper part of the S-shaped gap of the cooling pipe set along with the sliding of the sliding row, and after the sliding row is stressed, the pressure heads can pass through the S-shaped gap to be pressed down;

when the cooling pipe is used, cooling fluid is not filled in the cooling pipe group, the sliding row is far away from the front platform of the converter, molten steel is obliquely injected into the steel ladle by the converter, during the period, waste steel slag splashes and falls on the cooling pipe group to be solidified, and then the cooling fluid is introduced into the cooling pipe group, so that the high-temperature steel slag is cooled and becomes brittle; after the steel ladle is transported away, the slide bar rolls to come in front of the furnace, the pressure head is inserted into the cooling pipe S-shaped, the slide bar is pressed down, and the pressure head is pressed down to enable the crushed and cold and crisp steel slag to fall into the slag collecting groove; and returning the slide row to prepare for transferring the next batch of steel ladles.

Further, the slide bar is composed of a plurality of slide bar units with the same structure, each slide bar unit comprises an upper plate and a lower plate, the pressure head is arranged on the upper plate, the upper plate and the lower plate are connected through an elastic piece and a guide post, the bottom of the lower plate is provided with a rolling body, a hooking strip and a hooking hook, and the rolling body enables the slide bar unit to freely slide on a furnace front platform; the connecting hooks can hook the hooking strips of the adjacent slide units to enable the plurality of slide units to be hooked into a slide; when the steel slag pushing device is used, a stoker operates the forklift to start on each upper plate of the sliding row, and the dead weight of the forklift pushes down different upper plates of the sliding row units to drive the pressure head to push down the steel slag.

Further, the cooling pipe group is an upper pipe and a lower pipe, wherein the upper pipe and the lower pipe are staggered under the condition of leaving a joint pressing-down gap of a pressure supply head, the upper pipe is supported by the lower pipe through a supporting column, and the lower pipe is supported by the top surface of a furnace front platform.

Further, the elastic body is a spring; the guide post is a three-stage telescopic rod, and a reinforcing rib is arranged at the joint of the pressure head and the upper plate.

Further, the side surface and the bottom surface of the lower plate are provided with anastomotic structures corresponding to fork teeth of the forklift.

(III) beneficial effects

The scheme firstly utilizes the characteristic that the temperature of steel is higher when the steel is just solidified to design the cooling pipe to be accepted, and uses cooling liquid to make the steel slag become brittle, then uses the slide row capable of conveniently indexing and the pressure head on the slide row to crush the steel, does not need an additional power mechanism or automatic control, is suitable for severe furnace mouth environments, has high reliability and extremely simple structure, can be built by a steel mill, and can not influence continuous production even if damaged. Meanwhile, the self weight of the forklift is adopted for crushing, other stress application mechanisms are not needed, and a stokehole worker can start to use without training.

Drawings

FIG. 1 is a general arrangement and use schematic according to the present application;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is an enlarged view of a portion of the box of FIG. 3;

FIG. 5 is a side view of FIG. 1;

FIG. 6 is a side view of a single slide plate assembly;

FIG. 7 is an isometric view of a skateboard assembly;

FIG. 8 is another directional isometric view of the skateboard assembly;

FIG. 9 is a top view of the sled assembly;

FIG. 10 is another directional side view of the skateboard assembly;

FIG. 11 is a schematic illustration of a slider assembly hooking and construction.

Reference numerals

1. Converter

2. Guard board

3. Stokehold platform

4. Cooling tube set

5. Slide row

6. Fork truck

7. Upper plate

8. Lower plate

9. Elastic piece

10. Guide post

11. Reinforcing rib

12. Pressure head

13. Hook connecting strip

14. Connecting hook

15. Rolling element

16. Upper pipe

17. Lower pipe

18. Slag collecting tank

Detailed Description

The application is further illustrated below with reference to examples.

As shown in fig. 1, the slag removing device of the steel tapping hole of the steelmaking converter according to the application comprises a converter 1, a guard plate 2 and a stokehole platform 3, and is characterized in that: the cooling tube group 4 is positioned at the tapping hole of the converter and consists of hard pipelines capable of circulating liquid with specific temperature, and the hard pipelines are distributed in an S shape; the cooling pipe group covers a region with steel slag falling on a furnace front platform; the stokehold platform below the cooling pipe group is also provided with a slag collecting groove 18;

the device also comprises a slide bar 5 which can slide on the furnace front platform, wherein a plurality of pressure heads 12 are arranged on the slide bar 5, the pressure heads 12 can extend into the upper part of the S-shaped gap of the cooling tube group along with the sliding of the slide bar, and after the slide bar is stressed, the pressure heads can pass through the S-shaped gap to be pressed down;

The scheme does not select to increase force (such as a hydraulic system) to crush the steel slag like other schemes, but adopts chargeable cooling fluid (water which can be at normal temperature, carbon dioxide which is just sublimated and various compressed gases), and the steel slag is actively cooled after being cooled, so that the high-temperature steel slag is embrittled, and then crushed by a pressure head, thereby achieving the purpose of collection.

This is where the skid plate is designed as a mechanism that can enter-operate-exit at the forehearth platform, which does not affect the ladle activity, and can be directly adapted to existing steelworks because of the close forehearth platform structure of the various steelworks that have been built.

Further, the slide bar is composed of a plurality of slide bar units with the same structure, each slide bar unit comprises an upper plate 7 and a lower plate 8, the pressure head is arranged on the upper plate 7, the upper plate 7 and the lower plate 8 are connected through an elastic piece 9 and a guide post 10, the bottom of the lower plate is provided with a rolling body 15, a hooking strip 13 and a connecting hook 14, and the rolling body 15 enables the slide bar unit to freely slide on a furnace front platform; the connecting hooks can hook the hooking strips of the adjacent slide units to enable the plurality of slide units to be hooked into a slide; when the steel slag pushing device is used, a stoker operates the forklift to start on each upper plate of the sliding row, and the dead weight of the forklift pushes down different upper plates of the sliding row units to drive the pressure head to push down the steel slag.

In the prior art, a great difficulty is that larger pressure is needed for destroying steel slag, a sliding unit for pressing down and destroying actions is designed in the scheme, then a fork truck is opened by a stokehold worker to press down the sliding unit, and the self weight of the fork truck (more than 1 ton and the fork truck can bear load and further improve pressure) is utilized to press down the upper plate, so that enough pressure is generated.

The hydraulic power generation device has the advantages that the destructive power generation side is independent of other equipment, the conventional forklift in a steel factory is used, the hydraulic power generation device does not relate to common stress application structures such as a hydraulic motor and the like, and the reliability is high. Secondly, the slide bar can enter and exit, and can be pushed by a forklift, so that the structure is simple and reliable, and the ladle transferring is not affected after the slide bar exits.

On the other hand, the slide bar is formed by hooking a plurality of slide bar units, and the slide bar units form a whole and can bear the fork truck to drive; in the other direction, the arrangement of the connecting hooks and the hooking strips ensures that the sliding row units can be fixed in the width direction, but can be inserted into the gaps of the cooling pipes in different depths in the length direction, and the cooling pipe layout with different diameters or not rectangular is more flexible to use.

Further, the cooling tube group comprises an S-shaped upper tube 16 and an S-shaped lower tube 17, the upper tube and the lower tube are staggered and arranged under the condition of leaving a joint pressure head pressing gap, the upper tube is supported by the lower tube through a supporting column, and the lower tube is supported by the top surface of the furnace front platform.

Referring to fig. 4, firstly, the design of the two layers of cooling pipes increases the area of the pipe surface for receiving steel slag, so as to prepare for later cooling, secondly, the lower pipe is supported by the platform, and the upper pipe is supported by the lower pipe, so that the pressure head can have enough supporting force when crushing solidified dendritic steel slag; the staggered design of the two pipes maximizes the shearing effect when the pressure head is pressed down, and improves the crushing effect.

This mating feature (not shown) is convenient for the stoker to push the slide bar into position and depth of cut with the forklift.

Further, the spring stiffness coefficient is sufficient to carry the weight of the forklift without yielding failure.

Further, the width and the number of the slide units are such that the width of the slide formed after hooking is wider than the width of the area on the front platform where steel slag possibly appears.

The foregoing describes one embodiment of the present application in detail, but the description is only a preferred embodiment of the present application and should not be construed as limiting the scope of the application. All equivalent changes and modifications within the scope of the present application are intended to be covered by the present application.

Claims

1. The slag removing device for the steel tapping hole of the steelmaking converter comprises a converter, a guard plate and a front furnace platform, and is characterized in that: the cooling pipe group is positioned at the tapping hole of the converter and consists of hard pipelines capable of circulating liquid with specific temperature, and the hard pipelines are distributed in an S shape; the cooling pipe group covers a region with steel slag falling on a furnace front platform; the furnace front platform below the cooling pipe group is also provided with a slag collecting groove;

the device comprises a furnace front platform, a cooling pipe set, a sliding row, a plurality of pressure heads and a cooling pipe set, wherein the sliding row slides on the furnace front platform, the plurality of pressure heads are arranged on the sliding row, and extend to the upper part of the S-shaped gap of the cooling pipe set along with the sliding of the sliding row, and when the sliding row is under pressure, the pressure heads penetrate through the S-shaped gap to press down;

when the cooling pipe is used, cooling fluid is not filled in the cooling pipe group, the sliding row is far away from the front platform of the converter, molten steel is obliquely injected into the steel ladle by the converter, during the period, waste steel slag splashes and falls on the cooling pipe group to be solidified, and then the cooling fluid is introduced into the cooling pipe group, so that the high-temperature steel slag is cooled and becomes brittle; after the steel ladle is transported away, the slide bar rolls to come in front of the furnace, the pressure head is inserted into the S-shaped gap of the cooling pipe, the slide bar is pressed down, and the pressure head is pressed down to enable the crushed and crisp steel slag to fall into the slag collecting groove; the slide row returns to the original position, and a next batch of steel ladles are prepared for transferring;

the sliding row comprises a plurality of sliding row units with the same structure, each sliding row unit comprises an upper plate and a lower plate, the pressure head is arranged on the upper plate, the upper plate is connected with the lower plate through an elastic piece and a guide post, the bottom of the lower plate is provided with a rolling body, a hooking strip and a hooking hook, and the rolling body enables the sliding row units to freely slide on a furnace front platform; the connecting hooks can hook the hooking strips of the adjacent slide units to enable the plurality of slide units to be hooked into a slide; when the steel slag pushing device is used, a stoker operates the forklift to start on each upper plate of the sliding row, and the forklift pushes down different upper plates of the sliding row units to drive the pressure head to push down the steel slag.

2. The slag removal device for the steel tapping hole of the steelmaking converter as set forth in claim 1, wherein: the cooling pipe group is including the upper pipe and the lower pipe of S-shaped, upper pipe and lower pipe stagger and arrange under the condition that leaves the clearance that common pressure head pushed down, the upper pipe is supported by the lower pipe through the support column, and the lower pipe is supported by stokehold platform top surface.

3. The slag removal device for the steel tapping hole of the steelmaking converter as set forth in claim 1, wherein: the elastic piece is a spring; the guide post is a three-stage telescopic rod, and a reinforcing rib is arranged at the joint of the pressure head and the upper plate.

4. The slag removal device for the steel tapping hole of the steelmaking converter as set forth in claim 1, wherein: and the side surface and the bottom surface of the lower plate are provided with anastomotic structures corresponding to fork teeth of the forklift.