Rapier for ladle

Abstract

The utility model discloses a kind of slagging-off plates for ladle, including slagging-off plate steel plate;Slagging-off plate steel plate top end welding fixed hoisting structure, two left and right distribution are set in upper portion, and installation positioning hole for being connected with on-site slagging-off equipment, every installation positioning hole is higher in the opening position of the front of slagging-off plate steel plate than in the opening position of the back of slagging-off plate steel plate, so that installation positioning hole is obliquely downward from front to back and is penetrated in slagging-off plate steel plate;The lower edge of slagging-off plate steel plate is divided into three sections of left, middle and right, wherein the middle section is concave, and left section and right section respectively form two left and right distribution and downward protruding sharp peaks.The slagging-off plate for ladle provided by the utility model has the following advantages: on the one hand, the lower part of slagging-off plate steel plate is butterfly-shaped structure as a whole, with two left and right distribution and downward protruding sharp peaks, which makes it convenient to break slag when inserting iron slag;On the other hand, installation positioning hole with inclination angle is designed on the slagging-off plate steel plate, which changes slagging-off angle and reduces iron slag flow.

Description

Technical Field

[0001] This utility model relates to the field of slag removal tools for molten iron, specifically to a high-efficiency slag removal plate for molten iron ladles. Background Technology

[0002] The slag removal process in the ladle is an auxiliary procedure before molten iron enters the converter for steelmaking. It is a crucial step in molten iron pretreatment, primarily aimed at removing blast furnace slag and some desulfurization slag to prevent sulfur reversion and ensure a low and stable sulfur content in the molten iron entering the converter. If slag (especially high-sulfur, high-silicon slag) enters the converter, it increases the amount of slag, dilutes the basicity, affects dephosphorization and desulfurization efficiency, and can even lead to operational problems such as splashing and lance sticking. Efficient slag removal reduces the consumption of auxiliary raw materials in the converter (such as lime and dolomite), achieving "less slag smelting" and improving smelting efficiency and stability. Good slag removal reduces unnecessary slag in the converter, improves heat and mass transfer conditions in the molten pool, and helps achieve efficient operations such as "non-discharge tapping," shortening blowing time and the smelting cycle. Ladle slag removal is essential for subsequent smelting of low-sulfur and high-quality steel, significantly reducing desulfurization pressure in the converter and LF refining process and improving steel cleanliness.

[0003] Traditional slag removal processes use steel plates directly. However, due to the extremely high temperatures of the slag and molten iron in the ladle, especially when the slag layer is thick, the straight steel plates used for slag removal will deform, soften, and melt at high temperatures, resulting in problems such as incomplete slag removal, high iron loss, low efficiency, and high material consumption.

[0004] The following existing technologies were found through a search: Patent specification CN218080393U discloses a slag-removing plate for molten iron ladles, comprising a welded slag-removing head and a slag-removing plate body, and a high-temperature refractory material wrapped around the slag-removing plate body. The slag-removing plate body and the high-temperature refractory material are reinforced with wire mesh. Anchors and penetrating steel columns, with both ends exposed, are welded onto the slag-removing plate body. The wire mesh is welded to the anchors and penetrating steel columns. This patented technology uses high-temperature refractory material to wrap the slag-removing plate body, anchors, and penetrating steel columns. The high-temperature refractory material, through the anchors, penetrating steel columns, and wire mesh, forms a unified whole, protecting the slag-removing plate body and preventing slag erosion and high-temperature deformation, thereby extending the service life of the slag-removing plate. Furthermore, the presence of the wire mesh improves the firmness of the high-temperature refractory material on the slag-removing plate body, making it less prone to detachment. Utility Model Content

[0005] Traditional slag removal plates have a straight plate structure, which results in high resistance when inserting slag and makes it easy for the slag to flow away from the bottom. This utility model provides a slag removal plate for molten iron ladles. On the one hand, the lower part of the slag removal plate has a butterfly-shaped structure with two pointed peaks that are distributed to the left and right and protrude downwards, which makes it easy to break the slag when inserting it. On the other hand, the slag removal plate has an inclined mounting and positioning hole designed on it to change the slag removal angle and reduce the flow of slag.

[0006] The specific technical solution is as follows: A slag removal plate for molten iron ladles includes a slag removal plate steel plate; a fixed hoisting structure is welded to the top of the slag removal plate steel plate, and two mounting and positioning holes are opened on the upper part, which are distributed left and right for connecting with on-site slag removal equipment (such as a robotic arm). The opening position of each mounting and positioning hole on the front of the slag removal plate steel plate is higher than its opening position on the back of the slag removal plate steel plate, so that the mounting and positioning hole penetrates the slag removal plate steel plate obliquely downward from front to back; the lower edge of the slag removal plate steel plate is divided into three sections: left, middle and right, of which the middle section is concave and forms two downward protruding peaks with the left and right sections respectively.

[0007] The slag removal plate for molten iron ladles of this invention can be lifted using a simple hook. Preferably, the fixed lifting structure is inverted V-shaped. The width of the fixed lifting structure is preferably 100-200mm. The fixed lifting structure is preferably made of round steel or threaded steel bars with a diameter of 20mm. The fixed lifting structure is preferably fully welded to the slag removal plate.

[0008] The slag removal plate is preferably a patterned steel plate. The thickness of the slag removal plate is preferably 22-30mm, and more preferably 25-30mm.

[0009] Preferably, the lower left and right sides of the slag removal plate are bent forward to form three parts: a left steel plate, a middle steel plate, and a right steel plate. These three parts form a curved boat-shaped structure, which allows the slag to gather and accumulate, improving slag removal efficiency. The angles between the left and middle steel plates, and between the right and middle steel plates, are preferably independently 120°~150°. Furthermore, the left and middle steel plates, and the right and middle steel plates, are preferably independently reinforced by welding with one or more reinforcing steel plates (e.g., two or three). The two ends of the boat-shaped structure are further reinforced by welding with reinforcing steel plates. The thickness of the reinforcing steel plates is preferably 20-25mm, and the width is preferably 50mm. The width of the middle steel plate is preferably 600mm.

[0010] The slag removal plate installation positioning hole of this utility model adopts a two-hole positioning installation design. Compared with one-point installation, two-point reinforcement support reduces the deformation of the slag removal plate and makes the design and production simpler.

[0011] The angle between the mounting positioning hole channel and the horizontal direction is preferably 10°~20°.

[0012] The mounting positioning hole is preferably a round hole with a diameter of 80-100mm.

[0013] Preferably, the mounting positioning hole is located 100-150mm away from the top of the slag removal plate steel plate.

[0014] Preferably, the two mounting and positioning holes are 300-400mm apart.

[0015] Preferably, the top and front sides of the slag removal plate are welded with reinforcing steel plates, and the top openings of the reinforcing steel plates correspond to the mounting positioning holes. The two mounting positioning holes are reinforced with steel plates welded to the front and back to reduce thermal deformation of the slag removal plate. The thickness of the reinforcing steel plates is preferably 20-30mm.

[0016] Preferably, the front and rear reinforcing steel plates at the top of the slag removal plate are either U-shaped or two independent vertical steel plates.

[0017] Preferably, the lower part of the slag removal plate steel plate is wrapped with refractory material, and V-shaped tail fin anchors are welded to the lower part of the slag removal plate steel plate. Through holes are opened in the lower part of the slag removal plate steel plate. The refractory material is tightly connected to the lower part of the slag removal plate steel plate through the V-shaped tail fin anchors and through holes, forming a whole, thereby protecting the slag removal plate steel plate and preventing the steel structure itself from being corroded by slag and deformed at high temperatures, thus extending the service life of the slag removal plate. The lower part of the slag removal plate steel plate is wrapped with refractory material covering the steel plate and anchors. The refractory material is preferably a high-alumina or corundum castable, formed by self-flowing or vibration casting.

[0018] The total height of the slag removal plate after the lower part is wrapped with refractory material is preferably 500-600mm, and the width is preferably 1000mm.

[0019] Preferably, the thickness of the refractory material covering the lower front of the slag removal plate is greater than the thickness of the refractory material covering the rear and the thickness of the refractory material covering the left and right sides. The front of the slag removal plate is the working surface for slag removal, and the refractory material is thicker to resist iron slag corrosion and extend the service life of the slag removal plate. The rear of the slag removal plate is mainly for protecting the steel structure, and the refractory material is relatively thinner. The different thicknesses of the refractory material on the front and back of the slag removal plate achieve balanced refractory loss and reduce the cost of refractory material for the slag removal plate.

[0020] Preferably, the thickness of the refractory material wrapped around the lower front of the slag removal plate is 80mm, the thickness of the refractory material wrapped around the back is 40mm, and the thickness of the refractory material wrapped around the left and right sides is 40mm.

[0021] Preferably, the V-shaped tail fin anchor at the lower front of the slag removal plate steel plate is the first anchor, with a height of 50mm, an opening angle of 60° for both arms, and a total width of 120mm for the V-shaped tail fin, so as to match the thickness of the refractory material wrapped at the lower front of the slag removal plate steel plate.

[0022] Preferably, the V-shaped tail wing anchors on the lower rear and left and right sides of the slag removal plate steel plate are the second anchors, with a height of 20mm, an opening angle of 60° for both arms, and a total width of 70mm for the V-shaped tail wing, so as to match the thickness of the refractory material wrapped on the lower rear of the slag removal plate steel plate and the thickness of the refractory material wrapped on the left and right sides.

[0023] The V-shaped tail fin anchor is preferably welded with alternating horizontal and vertical welds, and the spacing between adjacent anchors is preferably 100-200mm.

[0024] The V-shaped tail fin anchor is preferably made of bent threaded steel with a diameter of 5-8mm. The threaded structure of the threaded steel and the V-shaped tail fin anchor structure make the refractory material and the anchor tightly bonded.

[0025] The slag removal plate is made of patterned steel plate, and the V-shaped tail wing anchor is made of threaded steel. The patterned and threaded structure of the patterned and threaded steel makes the castable material bond tightly to the steel structure.

[0026] The through holes are holes that are uniformly cut directly into the lower part of the slag removal plate. The diameter of the through holes is preferably 30-50 mm, and the spacing between adjacent holes is preferably 200-500 mm.

[0027] Preferably, the upper part of the slag removal plate also has two casting installation positioning holes, distributed from left to right, for positioning during the pouring of refractory materials. The diameter of the casting installation positioning holes is preferably 20mm.

[0028] Preferably, the slag removal plate for the molten iron ladle is used for full-scale welding, and spot welding is not allowed.

[0029] Compared with the prior art, the advantages of this utility model are as follows: This utility model has a simple structural design and is easy to manufacture. It can improve slag removal efficiency, extend the service life of the slag removal plate, remove slag more cleanly, reduce iron loss, reduce the labor intensity of installation, better meet the needs of current ironmaking technology advancement, and conform to the requirements of the current green and low-carbon development of the steel industry. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the slag removal plate used in the molten iron ladle in a specific implementation method.

[0031] Figure 2 This is a schematic diagram of the main structure of the slag removal plate for the molten iron ladle in a specific implementation.

[0032] Figure 3 for Figure 2 Schematic diagram of the AA section structure.

[0033] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of the middle BB. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0035] See Figures 1 to 4 A slag skimmer plate for molten iron ladles includes a slag skimmer plate steel plate 3. The slag skimmer plate steel plate 3 is a patterned steel plate with a thickness of 22-30mm. The lower left and right sides of the slag skimmer plate steel plate 3 are bent forward, forming three parts: a left steel plate, a middle steel plate, and a right steel plate. The width of the middle steel plate is 600mm. The angles between the left and middle steel plates and between the right and middle steel plates are 150°. The left and middle steel plates, as well as the right and middle steel plates, are reinforced by welding with two reinforcing steel plates 8. The thickness of the reinforcing steel plates 8 is 20-25mm, and the width is 50mm. The lower edge of the slag skimmer plate steel plate 3 is divided into three sections: left, middle, and right. The middle section is concave, forming two downward-protruding peaks with the left and right sections respectively. The lower part of the slag removal plate 3 is wrapped with refractory material 9. A V-shaped tail fin anchor 6 is welded to the lower part of the slag removal plate 3. A through hole 7 is opened in the lower part of the slag removal plate 3. The refractory material 9 is tightly connected to the lower part of the slag removal plate 3 through the V-shaped tail fin anchor 6 and the through hole 7. The total height of the lower part of the slag removal plate 3 after being wrapped with refractory material 9 is 500-600mm, and the width is 1000mm. The thickness of the refractory material 9 wrapped at the front of the lower part of the slag removal plate 3 is 80mm, the thickness of the refractory material 9 wrapped at the rear is 40mm, and the thickness of the refractory material 9 wrapped on the left and right sides is 40mm. The V-shaped tail fin anchor 6 at the front of the lower part of the slag removal plate 3 is the first anchor 61, with a height of 50mm, an opening angle of 60° for both arms, and a total width of 120mm for the V-shaped tail fin. The V-shaped tail fin anchors 6 on the lower rear and left and right sides of the slag removal plate steel plate 3 are the second anchors 62, with a height of 20mm, an opening angle of 60° for both arms, and a total width of 70mm for the V-shaped tail fin. The V-shaped tail fin anchors 6 are welded using a staggered horizontal and vertical welding method, with adjacent spacing of 100-200mm. The V-shaped tail fin anchors 6 are made of 5mm diameter threaded steel bent into shape. The diameter of the through holes 7 is 30-50mm, with adjacent spacing of 200-500mm.

[0036] The top of the slag removal plate steel plate 3 is welded with a fixed hoisting structure 1. The fixed hoisting structure 1 is an inverted V shape, made of threaded steel bars with a diameter of 20mm and a width of 150mm, and is fully welded to the slag removal plate steel plate 3.

[0037] Two mounting holes 2, arranged horizontally on the upper part of the slag removal plate 3, are provided for connection to the on-site slag removal equipment. The opening position of each mounting hole 2 on the front of the slag removal plate 3 is higher than its opening position on the back of the slag removal plate 3, so that the mounting hole 2 extends diagonally downwards through the slag removal plate 3 from front to back. The angle between the hole channel of the mounting hole 2 and the horizontal direction is 15°. The mounting hole 2 is a circular hole with a diameter of 90mm. The opening position of the mounting hole 2 on the front of the slag removal plate 3 is 150mm from the top of the slag removal plate 3. The two mounting holes 2 are 400mm apart.

[0038] The slag removal plate 3 has reinforcing steel plates 4 welded to both the front and back sides of its upper part. The reinforcing steel plates 4 are U-shaped, and the top openings of the two arms of the U shape correspond to the installation positioning holes 2. The thickness of the reinforcing steel plates 4 is 20-30mm.

[0039] The upper part of the slag removal plate 3 also has two casting installation positioning holes 5, which are distributed on the left and right sides and used for positioning when pouring refractory material 9. The diameter of the casting installation positioning holes 5 is 20mm.

[0040] All the welding involved in the slag removal plates used for molten iron ladles mentioned above is full welding.

[0041] Furthermore, it should be understood that after reading the above description of this utility model, those skilled in the art can make various alterations or modifications to this utility model, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A slag skimmer for molten iron ladles, characterized in that, Includes a slag removal plate (3); the top of the slag removal plate (3) is welded with a fixed hoisting structure (1), and two installation positioning holes (2) are opened on the upper part for connecting with the slag removal equipment on site. The opening position of each installation positioning hole (2) in front of the slag removal plate (3) is higher than the opening position behind the slag removal plate (3), so that the installation positioning hole (2) passes through the slag removal plate (3) obliquely from front to back; the lower edge of the slag removal plate (3) is divided into three sections: left, middle and right. The middle section is concave, forming two downward-protruding peaks with the left and right sections respectively.

2. The slag skimmer for molten iron ladle according to claim 1, characterized in that, The fixed hoisting structure (1) is an inverted V-shape, made of round steel or threaded steel bars with a diameter of 20mm and a width of 100-200mm, and is fully welded to the slag removal plate steel plate (3).

3. The slag skimmer for molten iron ladle according to claim 1, characterized in that, The slag removal plate (3) is a patterned steel plate with a thickness of 22-30mm; The lower left and right sides of the slag removal plate (3) are bent forward to form three parts: the left steel plate, the middle steel plate and the right steel plate. The angle between the left steel plate and the middle steel plate and the angle between the right steel plate and the middle steel plate are 120°~150° respectively. The left steel plate and the middle steel plate and the right steel plate and the middle steel plate are respectively reinforced by welding with one or more reinforcing steel plates (8). The thickness of the reinforcing steel plate (8) is 20-25mm and the width is 50mm; The width of the middle steel plate is 600mm.

4. The slag skimmer for molten iron ladle according to claim 1, characterized in that, The angle between the hole channel of the mounting positioning hole (2) and the horizontal direction is 10°~20°; The mounting positioning hole (2) is a round hole with a diameter of 80-100mm; The mounting positioning hole (2) is located 100-150mm away from the top of the slag removal plate (3) at the opening position in front of the slag removal plate (3); The two mounting and positioning holes (2) are 300-400mm apart.

5. The slag-removing plate for molten iron ladles according to claim 1, characterized in that, The front and back sides of the slag removal plate (3) are welded with reinforcing steel plates (4), and the top opening of the reinforcing steel plate (4) corresponds to the installation positioning hole (2). The thickness of the reinforcing steel plate (4) is 20-30mm; The front and rear reinforcing steel plates (4) of the slag removal plate (3) are either U-shaped or two independent vertical steel plates.

6. The slag skimmer for molten iron ladle according to claim 1, characterized in that, The lower part of the slag removal plate (3) is wrapped with refractory material (9). The lower part of the slag removal plate (3) is welded with V-shaped tail fin anchor (6). The lower part of the slag removal plate (3) has a through hole (7). The refractory material (9) is tightly connected to the lower part of the slag removal plate (3) through the V-shaped tail fin anchor (6) and the through hole (7).

7. The slag skimmer for molten iron ladle according to claim 6, characterized in that, The total height of the slag removal plate steel plate (3) after being wrapped with refractory material (9) is 500-600mm and the width is 1000mm. The thickness of the refractory material (9) wrapped around the lower front of the slag removal plate steel plate (3) is greater than the thickness of the refractory material (9) wrapped around the back and the thickness of the refractory material (9) wrapped around the left and right sides. The refractory material (9) wrapped around the lower front of the slag removal plate (3) is 80mm thick, the refractory material (9) wrapped around the back is 40mm thick, and the refractory material (9) wrapped around the left and right sides is 40mm thick. The V-shaped tail wing anchor (6) at the lower front of the slag removal plate steel plate (3) is the first anchor (61), with a height of 50mm, an opening angle of 60° for both arms, and a total width of 120mm for the V-shaped tail wing. The V-shaped tail wing anchor (6) on the lower rear and left and right sides of the slag removal plate steel plate (3) is the second anchor (62), with a height of 20mm, an opening angle of 60° for the two arms, and a total width of 70mm for the V-shaped tail wing. The V-shaped tail fin anchor (6) is welded in a staggered manner with an adjacent spacing of 100-200mm; The V-shaped tail fin anchor (6) is made of threaded steel with a diameter of 5-8mm.

8. The slag skimmer for molten iron ladle according to claim 6, characterized in that, The diameter of the through hole (7) is 30-50mm, and the spacing between adjacent holes is 200-500mm.

9. The slag skimmer for molten iron ladle according to claim 6, characterized in that, The upper part of the slag removal plate (3) also has two casting installation positioning holes (5) distributed on the left and right for positioning when casting refractory material (9); The diameter of the casting installation positioning hole (5) is 20mm.

10. The slag skimmer for molten iron ladle according to claim 1, 3, 5, 6 or 7, characterized in that, All welding operations were full welds.

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