A vibrating slagging furnace cover device for secondary refining

Abstract

The utility model discloses a kind of vibration slag removal type furnace cover devices, for improving furnace outside refining continuous operation ability.The device includes: the furnace cover main part of built-in water cooling circulation passage, its top is connected with the guide slide groove on vertical wall by sliding hoisting mechanism;Vibration drive unit is driven by vertical wall outside hydraulic cylinder, piston rod is articulated furnace cover side wall and realizes horizontal reciprocating vibration, so that un-solidified hot slag is separated from inner wall;Synchronous purging system is composed of argon gas delivery pipeline and evenly distributed gas nozzle, and argon gas is sprayed to the gap between furnace cover and ladle during vibration process and hot slag is blown off.This device realizes slag layer active prevention and control through the synergistic effect of vibration and purging, significantly improves molten steel processing capacity per furnace, and improves continuous operation efficiency to new level.Its innovative structure simplifies slag removal operation, provides reliable technical solution for cost reduction and efficiency improvement of steel enterprises, and promotes technical transformation of slag layer management from passive cleaning to active prevention and control.

Description

Technical Field

[0001] This utility model belongs to the field of steelmaking technology in iron and steel metallurgy, and particularly relates to a vibrating slag-cleaning furnace cover device for ladle refining. Background Technology

[0002] In the steelmaking industry of iron and steel metallurgy, ladle refining is a key process for improving the purity and compositional uniformity of molten steel. During the refining process, the molten steel needs to be continuously heated using methods such as electric arc heating. At this time, the furnace lid needs to be pressed down to the ladle opening to create a closed environment. Its functions include:

[0003] Insulation and thermal efficiency assurance: Prevent heat loss from the furnace through openings, ensure stable temperature during heating, and avoid energy waste and process fluctuations caused by heat dissipation;

[0004] Preventing molten steel from absorbing air and slag from overflowing: A closed environment can reduce the oxidation and air absorption caused by contact between molten steel and air, while also suppressing slag splashing and overflowing during electric arc heating;

[0005] Equipment protection: The furnace cover is usually integrated with a water cooling circulation system, which reduces the temperature of the furnace cover by forced cooling, alleviates the damage to the material caused by high temperature thermal stress, and extends the service life.

[0006] However, existing furnace cover devices have significant drawbacks in practical applications:

[0007] Slag adhesion and blockage issues: During electric arc heating or molten steel processing, splashed slag (containing highly adhesive components such as iron) easily adheres to the inner wall and edges of the furnace cover. As the slag layer thickens, the gap between the furnace cover and the ladle gradually becomes blocked, preventing the subsequent ladle from accurately entering the heating position, necessitating production interruption for manual slag removal.

[0008] Low slag removal efficiency: High-temperature slag has strong adhesion. Traditional cleaning methods, such as mechanical knocking or high-pressure water gun cleaning after shutdown, are time-consuming (usually more than 25 minutes) and have problems such as incomplete slag removal and damage to the furnace cover surface, which seriously restricts production efficiency.

[0009] Limitations of water cooling systems: Although water cooling structures can delay high-temperature deformation of the furnace cover, slag accumulation can hinder the heat exchange efficiency of the cooling channels, and there is still a risk of local overheating during long-term operation.

[0010] To address the aforementioned issues, existing technologies attempt to alleviate slag adhesion by optimizing the furnace cover material or improving the water-cooling pipeline layout, but these methods fail to fundamentally solve the need for rapid slag removal. Therefore, there is an urgent need for a furnace cover device capable of rapidly removing unsolidified hot slag during refining intervals to achieve continuous production and improve overall equipment efficiency. Utility Model Content

[0011] In view of the problems existing in the prior art, this utility model provides a vibrating slag-cleaning furnace cover device for ladle refining.

[0012] This utility model is implemented as follows: a vibrating slag-cleaning furnace cover device for ladle refining includes: a furnace cover body with an internal water-cooled circulation channel for covering the ladle opening and forming a closed heating environment; the top of the furnace cover body is connected to a horizontally arranged guide groove through a sliding hoisting mechanism, and the guide groove is fixedly installed on the vertical wall of the furnace cover lifting system.

[0013] The vibration drive unit includes a hydraulic cylinder, which is fixedly installed on the outside of the vertical wall. The piston rod end of the hydraulic cylinder is hinged to the side wall of the furnace cover body, and is used to drive the furnace cover body to reciprocate horizontally along the guide groove, so that the unsolidified sticky hot slag is separated from the inner wall of the furnace cover.

[0014] The synchronous purging system includes an argon gas delivery pipeline and multiple gas nozzles. The argon gas delivery pipeline is laid along the vertical wall and connected to an external gas source. The gas nozzles are evenly distributed at the lower edge of the furnace cover body and are connected to the argon gas delivery pipeline through branch pipelines. During the vibration of the furnace cover, the synchronous purging system sprays argon gas into the gap between the inner wall of the furnace cover and the ladle opening to blow the loosened hot slag away from the furnace cover.

[0015] Preferably, there are 16 air nozzles, which are evenly distributed around the lower end of the furnace cover body, and the blowing direction is inclined towards the slag accumulation area between the inner wall of the furnace cover and the ladle opening.

[0016] Preferably, the synchronous purging system further includes a manual control valve, located at the connection between the argon gas delivery pipeline and the branch pipeline, for manually activating the purging function during the non-heating phase.

[0017] Preferably, the sliding hoisting mechanism includes a roller assembly that matches the guide groove. The roller assembly is fixed to the top of the furnace cover body by a rigid bracket, and the roller surface is coated with a high-temperature resistant ceramic coating.

[0018] The advantages and technical effects of this utility model are as follows: This utility model addresses the problem of slag accumulation on the furnace cover affecting production efficiency during ladle refining by innovatively integrating vibration and purging functions, achieving a breakthrough in slag control technology.

[0019] This device utilizes the synergistic effect of high-frequency vibration and directional airflow to construct a highly efficient slag removal system. During heating intervals, a maintenance procedure is initiated, using the periodic disturbances generated by the vibration to loosen incompletely solidified slag. Combined with precisely positioned purging airflow, the slag layer adhering to the inner wall of the furnace cover is quickly removed. This proactive maintenance mechanism effectively avoids production interruptions caused by slag buildup and blockage in traditional processes, significantly reducing downtime for cleaning and enabling continuous and efficient refining operations.

[0020] Simultaneously, the combined effect of vibration and purging alters the adhesion characteristics of the slag, reducing the bond strength between the slag layer and the furnace cover, thus fundamentally reducing slag accumulation. The device also optimizes the furnace cover's movement trajectory, ensuring the safety of the water-cooling system while reducing mechanical impact damage to the equipment and extending the furnace cover's service life.

[0021] This innovative design not only increases the steel throughput per furnace, but also elevates the continuous operation capability of ladle refining to a new level, realizing a shift in slag management from passive cleaning to proactive prevention. Its simple and efficient operation mode and significant efficiency improvement provide a reliable technical solution for steel companies to reduce costs and increase efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the synchronous purging system of this utility model.

[0024] In the diagram: 1. Furnace cover body; 2. Sliding hoisting mechanism; 21. Roller assembly; 22. Rigid support; 3. Guide chute; 4. Vertical wall; 5. Vibration drive unit; 51. Hydraulic cylinder; 52. Piston rod; 6. Synchronous purging system; 61. Argon gas delivery pipeline; 62. Blowing nozzle; Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0026] Please see Figure 1 and Figure 2 A vibratory slag-cleaning furnace cover device for ladle refining includes: a furnace cover body 1, with an internal water-cooled circulation channel for covering the ladle opening and forming a closed heating environment to prevent rapid sintering and solidification of slag due to high temperatures, while reducing thermal stress damage to the furnace cover structure. The temperature difference between the cooling channel and the slag contact surface accelerates the separation of the slag layer from the furnace cover surface, making it easier to detach during vibratory slag cleaning; this is prior art; the top of the furnace cover body is connected to a horizontally set guide chute 3 via a sliding hoisting mechanism 2, and the guide chute is fixedly installed on the vertical wall 4 of the furnace cover lifting system; the guide chute provides a precise horizontal reciprocating motion trajectory for the furnace cover, preventing the furnace cover from shifting or jamming during vibration. The sliding hoisting mechanism evenly distributes the weight of the furnace cover to the guide chute, ensuring that the vibration drive unit only needs to overcome friction, while avoiding vibration energy loss, significantly improving slag cleaning efficiency.

[0027] The vibration drive unit 5 includes a hydraulic cylinder 51, which is fixedly installed on the outer side of the vertical wall. The piston rod 52 of the hydraulic cylinder is hinged to the side wall of the furnace cover body, and is used to drive the furnace cover body to perform horizontal reciprocating vibration along the guide groove, so that the unsolidified, adherent hot slag is separated from the inner wall of the furnace cover. Through high-frequency drive of the hydraulic cylinder (adjustable from 10-30Hz), the furnace cover generates a horizontal amplitude of 3-8mm mechanical vibration, applying shear force to the unsolidified, adherent slag, breaking the physical bond between the slag layer and the inner wall of the furnace cover (adhesion reduced by 60%-80%). The vibration energy is concentrated in the slag accumulation area at the edge of the furnace cover, avoiding fatigue damage to internal structures such as water-cooled pipes.

[0028] The synchronous purging system 6 includes an argon gas delivery pipeline 61 and multiple blowing nozzles 62. The argon gas delivery pipeline is laid along the vertical wall and connected to an external gas source. The blowing nozzles are evenly distributed at the lower edge of the furnace cover body and connected to the argon gas delivery pipeline through branch pipelines. During the vibration of the furnace cover, the synchronous purging system injects argon gas into the gap between the inner wall of the furnace cover and the ladle opening, blowing the loosened hot slag away from the furnace cover. The 16 blowing nozzles are distributed at a 22.5° equidistant angle along the circumference of the furnace cover, covering a 360° slag cleaning range. The inclined blowing (at an angle of 30°-45° with the horizontal plane) allows the argon gas flow to directly impact the slag accumulation gap between the inner wall of the furnace cover and the ladle opening, using the kinetic energy of the gas to blow the loosened slag particles away from the furnace cover. At the same time, the inert atmosphere of argon gas inhibits secondary oxidation and adhesion of the slag layer, solving the problem of incomplete slag cleaning.

[0029] Preferably, there are 16 air nozzles, which are evenly distributed around the lower end of the furnace cover body, and the blowing direction is inclined towards the slag accumulation area between the inner wall of the furnace cover and the ladle opening.

[0030] Preferably, the synchronous purging system also includes a manual control valve, located at the connection between the argon gas delivery pipeline and the branch pipeline, for manually initiating the purging function during the non-heating phase. The valve allows for manual switching of argon gas supply between the purging and heating phases, preventing argon gas flow from interfering with arc stability during heating. Centralized gas supply during the non-heating phase ensures synchronization between purging intensity and vibration slag removal, reducing argon gas consumption and meeting the energy-saving requirements of metallurgical equipment.

[0031] Preferably, the sliding hoisting mechanism 2 includes a roller assembly 21 that matches the guide groove. The roller assembly is fixed to the top of the furnace cover body by a rigid bracket 22, and the roller surface is coated with a high-temperature resistant ceramic coating.

[0032] As described above, this invention utilizes a combined "vibration stripping + argon purging" mechanism to rapidly remove unsolidified slag layers during refining intervals (non-heating stages). A single slag removal cycle takes ≤5 minutes (80% shorter than traditional manual cleaning), and requires no furnace cover disassembly, significantly reducing production downtime. The water-cooling and anti-sticking design further ensures that the slag removal process has no negative impact on the furnace cover's sealing performance and high-temperature resistance, achieving a balance between high-efficiency production and long equipment lifespan.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vibrating slag-cleaning furnace cover device for ladle refining, characterized in that, include: The furnace cover body has an internal water-cooled circulation channel to cover the ladle opening and form a closed heating environment; the top of the furnace cover body is connected to a horizontally set guide groove through a sliding hoisting mechanism, and the guide groove is fixedly installed on the vertical wall of the furnace cover lifting system; The vibration drive unit includes a hydraulic cylinder, which is fixedly installed on the outside of the vertical wall. The piston rod end of the hydraulic cylinder is hinged to the side wall of the furnace cover body, and is used to drive the furnace cover body to reciprocate horizontally along the guide groove, so that the unsolidified sticky hot slag is separated from the inner wall of the furnace cover. The synchronous purging system includes an argon gas delivery pipeline and multiple gas nozzles. The argon gas delivery pipeline is laid along the vertical wall and connected to an external gas source. The gas nozzles are evenly distributed at the lower edge of the furnace cover body and are connected to the argon gas delivery pipeline through branch pipelines. During the vibration of the furnace cover, the synchronous purging system sprays argon gas into the gap between the inner wall of the furnace cover and the ladle opening to blow the loosened hot slag away from the furnace cover.

2. The vibrating slag-cleaning furnace cover device according to claim 1, characterized in that: The number of air nozzles is 16, which are evenly distributed around the lower end of the furnace cover body, and the blowing direction is inclined towards the slag accumulation area between the inner wall of the furnace cover and the ladle opening.

3. The vibratory slag-cleaning furnace cover device according to claim 1 or 2, characterized in that: The synchronous purging system also includes a manual control valve, which is located at the connection between the argon gas delivery pipeline and the branch pipeline, and is used to manually start the purging function during the non-heating stage.

4. The vibrating slag-cleaning furnace cover device according to claim 1, characterized in that: The sliding hoisting mechanism includes a roller assembly that matches the guide groove. The roller assembly is fixed to the top of the furnace cover body by a rigid bracket, and the roller surface is coated with a high-temperature resistant ceramic coating.

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