Composite steel ladle cover capable of effectively preventing cover opening adhesion

Abstract

The utility model discloses a composite steel ladle cover capable of effectively preventing adhesion of a cover opening, which comprises a steel ladle cover body, the cover opening, an anchoring part and castable, and the cover opening is arranged on the outer circle of the steel ladle cover body; the cover opening is in an isosceles trapezoid shape; the anchoring part and the castable are sequentially arranged at the lower part of the steel ladle cover body; and the castable is a high-strength heavy castable. The cover opening is in the isosceles trapezoid shape, so that the cover opening can be effectively prevented from being adhered to the steel ladle deslagging opening when the steel ladle is overturned for deslagging; the anchoring part is composed of a Y-shaped anchoring nail and a V-shaped anchoring hook, and the V-shaped anchoring hook is welded to the forked position of the Y-shaped anchoring nail to form an X-shaped structure, so that castable can be better hung; the castable is a high-strength heavy castable with the refractoriness of 1650 DEG C, and when the steel ladle cover is repaired, the castable can be knocked and detached. The steel ladle cover is simple in structure, reliable to use and capable of effectively preventing the cover opening from being adhered to the steel ladle deslagging opening.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical equipment technology, and further to the field of steelmaking equipment technology. Specifically, it relates to a composite ladle cover that is simple in structure, reliable in use, and can effectively prevent the cover from sticking together. Background Technology

[0002] In current steel metallurgical enterprises, steel ladles are used in the converter process, LF ladle refining furnace process, VD vacuum refining furnace process, and continuous casting process. In production organization, due to the long distance the ladle travels, especially from the converter to the LF refining furnace and continuous casting machine, the temperature drop of the molten steel and the ladle lining is significant. This not only affects the quality of the cast steel, but also necessitates increasing the converter tapping temperature, extending the ladle refining time, and increasing the online baking time of the ladle lining to maintain a constant pouring temperature. This increases energy consumption, affects the service life of the ladle lining, and raises production costs. Ladle heat dissipation generally consists of two parts: heat conduction between the ladle lining and the ladle shell; and radiant heat dissipation into the air through the opening at the top of the ladle. During steelmaking, the carbon and oxygen in the molten steel pool of the converter react violently to produce CO, causing the slag to foam. Foam also forms due to the interaction of oxidizing and reducing agents, producing gases. Common oxidizing agents include oxygen and carbon dioxide, while reducing agents are the metals in the furnace charge. When heated at high temperatures, these metals undergo chemical reactions, producing large amounts of gas. These gases become trapped in the furnace, forming foamy slag. The formation of foamy slag in the molten steel results in a decline in steel quality. After the converter and LF ladle refining processes are completed, the molten steel continues to boil due to the bottom blowing agitation after tapping. When the ladle is covered, the boiling foamy slag adheres to the bottom of the ladle cover. The ladle is covered after carrying the molten steel and then passes through the LF ladle refining furnace and the VD vacuum refining furnace. The ladle cover is opened using a cover-opening device at these locations, where the opening is a horizontal movement, and the adhesion of foamy slag to the bottom of the ladle cover is unaffected. However, after continuous casting, the slag (foamy slag) at the bottom of the ladle needs to be emptied from the ladle. This slag, also known as ladle casting residue, often sticks to the ladle cover opening during the slag emptying process. This frequently leads to the ladle cover detaching and falling off, causing damage. Therefore, developing a simple, reliable, and effective composite ladle cover that prevents cover adhesion is crucial to solving this problem. Utility Model Content

[0003] The purpose of this utility model is to provide a composite steel ladle cover that is simple in structure, reliable in use, and can effectively prevent the lid from sticking together.

[0004] The purpose of this utility model is achieved as follows: it includes a ladle cover body, a cover opening, anchors, and castable refractory. The cover opening is provided on the outer circle of the ladle cover body; the cover opening is in the shape of an isosceles trapezoid; anchors and castable refractory are sequentially provided on the lower part of the ladle cover body; the castable refractory is a high-strength heavy-duty castable refractory.

[0005] This utility model consists of a ladle cover body, a cover opening, anchors, and castable refractory. The cover opening is in the shape of an isosceles trapezoid, which can effectively prevent the cover opening from sticking to the ladle slag dumping opening when the ladle is tilted and slag is dumped. The anchors consist of "Y"-shaped anchor nails and "V"-shaped anchor hooks. The "V"-shaped anchor hooks are welded to the forks of the "Y"-shaped anchor nails to form an "X"-shaped structure, which facilitates better attachment of the castable refractory. The castable refractory is a high-strength heavy-duty castable refractory with a refractoriness of 1650 ℃. When repairing the ladle cover, the castable refractory can be knocked off.

[0006] The production steps are as follows:

[0007] 1. Fabricate the steel ladle cover body;

[0008] 2. Fabricate the anchoring components: weld the "V" shaped anchor hook to the fork of the "Y" shaped anchor nail to form an "X" shaped structure;

[0009] 3. Weld the anchors to the steel ladle cover body;

[0010] 4. Casting the refractory: During the casting process, a vibrating device is used to vibrate and ensure that the refractory is filled, compacted and tight (a portion of steel fiber can be sprinkled evenly in the middle layer of the refractory). Fine iron wires are used to tie the anchors together to enhance the compaction effect.

[0011] This utility model is a composite structure with a clear structural skeleton and good overall structural strength. During frequent use, the castable in the ladle cover will not crack due to temperature drop and cold contraction. For any minor damage or detachment during use, spray tamping material can be used for repair at any time, thereby achieving the requirement of long service life of the castable, reducing the amount of castable used, and lowering production costs.

[0012] This invention can effectively prevent the cover from sticking to the ladle slag outlet when the ladle is tilted and slag is dumped, and prevent the ladle cover from falling off, reducing the detachment rate from 10% to 2%; it improves efficiency and reduces overall usage and maintenance costs.

[0013] This utility model has a simple structure, is reliable in use, and can effectively prevent the cover opening from sticking to the slag discharge port of the ladle. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 for Figure 1 Top view diagram;

[0016] Figure 3 This is a schematic diagram of the anchor of this utility model;

[0017] Figure 4 This is a schematic diagram of the "Y"-shaped anchor nail of this utility model;

[0018] Figure 5 This is a schematic diagram of the "V"-shaped anchor hook of this utility model;

[0019] Figure 6 This is a schematic diagram illustrating the manufacture and installation of this utility model.

[0020] In the figure: 1-steel ladle cover body, 2-cover opening, 3-anchor, 31-“Y” type anchor nail, 32-“V” type anchor hook, 4-cast refractory. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings, but this does not limit the present invention in any way. Any modifications made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0022] like Figures 1-6 As shown, this utility model includes a ladle cover body 1, a cover opening 2, an anchor 3, and a castable 4. The cover opening 2 is provided on the outer circle of the ladle cover body 1. The cover opening 2 is in the shape of an isosceles trapezoid. The anchor 3 and the castable 4 are arranged sequentially on the lower part of the ladle cover body 1. The castable 4 is a high-strength heavy castable.

[0023] The steel ladle cover body 1 is made of structural steel and low alloy steel plate with a thickness of 8-10 mm.

[0024] The steel ladle cover body 1 can also be made of heat-resistant steel 1Cr18Ni9Ti.

[0025] The total thickness of the steel ladle cover body 1 is 280 mm, of which the thickness of the portion filled with the castable refractory 4 is 150 mm.

[0026] The dimensions of the cover opening 2 are: bottom side length 600mm, top side length 300mm, and height 280mm.

[0027] The anchor 3 is welded to the steel cover body 1.

[0028] The anchor 3 includes a "Y"-shaped anchor nail 31 and a "V"-shaped anchor hook 32. The "V"-shaped anchor hook 32 is welded to the fork of the "Y"-shaped anchor nail 31 to form an "X"-shaped structure.

[0029] The “Y”-shaped anchor nail 31 is made of heat-resistant steel 1Cr18Ni9Ti steel plate with a thickness of 2 mm and a total length of 80 mm, of which the straight section is 50 mm long and the “Y”-shaped section is 30 mm long.

[0030] The “V”-shaped anchor hook 32 is made of heat-resistant steel 1Cr18Ni9Ti steel plate with a thickness of 2 mm and a height of 30 mm.

[0031] The refractories of the castable 4 are 1650 °C and have an Al2O3 content of 55%.

[0032] The working principle and process of this utility model:

[0033] The cover 2 of this utility model is in the shape of an isosceles trapezoid, which can effectively prevent the cover from sticking to the slag dumping port when the ladle is tilted and slag is dumped; the anchor 3 is composed of "Y" shaped anchor nails 31 and "V" shaped anchor hooks 32. The "V" shaped anchor hooks 32 are welded to the fork of the "Y" shaped anchor hooks to form an "X" shaped structure, which makes it easier to hang the castable 4; the castable 4 is a high-strength heavy castable with a refractoriness of 1650℃. When repairing the ladle cover, the castable 4 can be knocked off.

[0034] The production steps are as follows:

[0035] 1. Fabricate the steel ladle cover body 1;

[0036] 2. Fabricate anchor 3, with "V" shaped anchor hook 32 welded to the fork of "Y" shaped anchor nail 31 to form an "X" shaped structure;

[0037] 3. Weld the anchor 3 to the steel ladle cover body 1;

[0038] 4. Casting refractory 4. During the casting process, a vibration device is used to vibrate and ensure that the refractory 4 is filled, compacted and pressed tightly (a portion of steel fiber can be sprinkled evenly in the middle layer of the refractory). Use thin iron wire to tie them together on the anchor 3 to enhance the compaction and pressing effect.

[0039] This utility model is a composite structure with a clear structural skeleton and good overall structural strength of the material. During frequent use, the castable 4 in the ladle cover will not crack due to temperature drop and cold contraction. For any minor damage or detachment during use, spray tamping material can be used for construction at any time, thereby achieving the requirement of long service life of the castable 4 and reducing the amount of castable 4 used.

Claims

1. A composite steel ladle cover capable of effectively preventing the cover opening from sticking together, comprising a steel ladle cover body (1), a cover opening (2), anchors (3), and castable refractory (4), characterized in that: The steel ladle cover body (1) is provided with a cover opening (2) on its outer circle; the cover opening (2) is in the shape of an isosceles trapezoid; the steel ladle cover body (1) is provided with anchors (3) and castable refractory (4) in sequence at its lower part; the castable refractory (4) is a high-strength heavy castable refractory.

2. The composite steel ladle cover according to claim 1, which effectively prevents the cover opening from sticking together, is characterized in that: The steel clasp cover body (1) is made of structural steel and low alloy steel plate with a thickness of 8-10 mm.

3. The composite steel ladle cover according to claim 1, which effectively prevents the lid from sticking together, is characterized in that: The steel ladle cover body (1) is made of heat-resistant steel 1Cr18Ni9Ti.

4. The composite steel ladle cover according to claim 1, which effectively prevents the lid from sticking together, is characterized in that: The total thickness of the steel ladle cover body (1) is 280 mm, of which the thickness of the portion filled with castable refractory (4) is 150 mm.

5. The composite steel ladle cover according to claim 1, which effectively prevents the cover opening from sticking together, is characterized in that: The dimensions of the cover opening (2) are: bottom side length 600mm, top side length 300mm, and height 280mm.

6. The composite steel ladle cover according to claim 1, which effectively prevents the cover opening from sticking together, is characterized in that: The anchor (3) is welded to the steel cover body (1).

7. The composite steel ladle cover according to claim 1, which effectively prevents the lid from sticking together, is characterized in that: The anchor (3) includes a "Y" type anchor (31) and a "V" type anchor hook (32). The "V" type anchor hook (32) is welded to the fork of the "Y" type anchor (31) to form an "×" shaped structure.

8. The composite steel ladle cover according to claim 7, which effectively prevents the cover opening from sticking together, is characterized in that: The “Y” type anchor (31) is made of heat-resistant steel 1Cr18Ni9Ti steel plate with a thickness of 2 mm and a total length of 80 mm, of which the straight section is 50 mm long and the “Y” type section is 30 mm long.

9. The composite steel ladle cover according to claim 7, which effectively prevents the cover opening from sticking together, is characterized in that: The "V" shaped anchor hook (32) is made of heat-resistant steel 1Cr18Ni9Ti steel plate with a thickness of 2 mm and a height of 30 mm.

10. The composite steel ladle cover according to claim 1, which effectively prevents the lid from sticking together, is characterized in that: The refractories of the castable (4) are 1650 °C and the Al2O3 content is 55%.

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