Converter with water-cooled trunnion ring preventing leakage due to burning

Abstract

The utility model discloses a converter with water -cooling drag ring anti -burning leakage function, including the annular water -cooling drag ring of setting around converter middle part outer periphery, the outside of water -cooling drag ring, and be located converter upside -down furnace face and the position at the position of tapping face, is provided with heat insulating net, every heat insulating net is annular structure, and the mesh in heat insulating net is filled with refractory material, wherein, heat insulating net and refractory material are used for blocking the high -temperature burning of high -temperature material that spreads from converter mouth to water -cooling drag ring. It has solved the problem of poor protection effect and insufficient pertinence of the existing converter water -cooling drag ring protection measure.

Description

Technical Field

[0001] This utility model belongs to the technical field of converter equipment, specifically relating to a converter with a water-cooled drag ring anti-burn-out function. Background Technology

[0002] In the steel smelting industry, the converter, as a core piece of equipment, undertakes the crucial task of converting molten iron into molten steel. To protect the water-cooled roller rings in converters, some steel mills increase the wall thickness of the water-cooled roller rings in an attempt to improve their resistance to erosion from high-temperature molten steel and slag. This method mainly involves using thicker plates to construct the water-cooled walls during the manufacturing process. For example, the original 8-10mm thick water-cooled wall is thickened to 12-15mm. Simultaneously, a layer of ordinary heat-insulating coating is applied to the exterior of the water-cooled roller ring, hoping to block heat transfer to some extent. This heat-insulating coating is generally composed of a mixture of ceramic fibers, silicates, and other materials, with a coating thickness of approximately 5-10mm.

[0003] Simply increasing the thickness of the water-cooled liner wall can delay burn-through time to some extent, but it is still difficult to fundamentally prevent burn-through when faced with the extremely high temperatures of molten steel and slag during furnace leakage. Prolonged erosion and thermal shock from high-temperature substances will gradually cause the thickened water-cooled wall to fail. Ordinary heat-insulating coatings are prone to peeling and carbonization at high temperatures, resulting in a rapid decline in their heat insulation performance and an inability to continuously and effectively block heat transfer. Utility Model Content

[0004] The purpose of this invention is to provide a converter with a water-cooled drag ring anti-burn-out function to solve the problems of poor protection effect and insufficient specificity of existing converter water-cooled drag ring protection measures.

[0005] The present invention adopts the following technical solution: a converter with a water-cooled drag ring anti-burn-out function, comprising an annular water-cooled drag ring arranged around the outer periphery of the middle part of the converter; A heat insulation net is installed on the outer side of the water-cooled drag ring, at the position of the converter inverted surface and the tapping surface; each heat insulation net is a ring structure, and refractory material is filled in the mesh of the heat insulation net; Among them, the heat insulation net and refractory materials are used to prevent the high-temperature substances splashed from the converter mouth from burning through the water-cooled drag ring.

[0006] Furthermore, the mesh shape of the insulation net is a regular rhombus or square.

[0007] Furthermore, the insulation mesh is made of high-temperature resistant, high-strength metal mesh or high-temperature resistant ceramic fiber mesh.

[0008] Furthermore, for large converters with a capacity of 100t or more, the refractory material filling thickness is 50-80mm; for small converters with a capacity of 50t or less, the refractory material filling thickness is 30-50mm.

[0009] The beneficial effects of this utility model are: By setting up protective structures in the two areas most susceptible to corrosion by high-temperature substances during furnace leakage—the furnace tipping surface and the tapping surface—this approach changes the crude method of simply thickening or applying coatings to the entire surface. Instead, it provides precise protection targeting the main direction of high-temperature substance spillage, making the protection more targeted and effectively reducing the risk of burn-out in critical areas.

[0010] The system employs a composite structure combining heat-insulating mesh and refractory materials. The heat-insulating mesh, made of high-temperature resistant and high-strength material, provides support for the refractory material, enhancing its mechanical strength and preventing it from detaching under high temperatures and mechanical impact. The refractory material, filling the mesh openings, effectively blocks heat transfer from molten steel and slag due to its high-temperature resistance, corrosion resistance, and excellent heat insulation properties. The synergistic effect of both effectively prevents the water-cooled converter ring from burning through. This avoids serious safety accidents such as explosions caused by cooling water leakage due to burn-through of the water-cooled converter ring, ensuring the safety of operators and the normal operation of equipment. Furthermore, this design is simple in structure, easy to implement and maintain, requires no large-scale and complex modifications to existing converters, has low cost, and offers good economic benefits and practical value. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A bottom view.

[0012] Among them, 1. converter, 2. water-cooled drag ring, 3. heat insulation net. Detailed Implementation

[0013] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0014] This utility model provides a converter with a water-cooled drag ring anti-burn-out function, such as... Figure 1 and Figure 2 As shown, the converter 1 includes an annular water-cooled drag ring 2 arranged around its central outer perimeter. The water-cooled drag ring 2 is internally equipped with cooling water pipes. The converter water-cooled drag ring body is the fundamental supporting component of the entire anti-burn-out structure, bearing the weight of the converter body and various stresses during tilting. It is typically made of high-quality alloy steel, possessing high strength and toughness to ensure it does not deform or break under long-term high-temperature, heavy-load operating conditions.

[0015] like Figure 2As shown, a heat insulation mesh 3 is installed on the outer side of the water-cooled drag ring 2, located at the inverted furnace surface and the tapping surface of converter 1. The inverted furnace surface and the tapping surface are located on two opposite sides of the converter, which are localized areas on the converter. Only in these areas is the spillage of high-temperature materials likely to occur, so the heat insulation mesh 3 is only installed in these two areas. The heat insulation mesh structure is made of high-temperature resistant and high-strength metal material. The heat insulation mesh structure is connected to the water-cooled drag ring body by full welding or segmented welding. In full welding, continuous welding is performed along the contact edge between the heat insulation mesh and the water-cooled drag ring body to ensure the sealing and firmness of the connection; segmented welding is performed at certain intervals, which can ensure the connection strength while appropriately reducing the amount of welding work and the heat-affected zone.

[0016] Each heat insulation mesh 3 is a ring structure, with refractory material filling the mesh openings. The refractory material filling the heat insulation mesh structure has the characteristics of high temperature resistance, corrosion resistance, and good heat insulation performance. High alumina refractory materials or corundum refractory materials are selected, and their refractoriness can reach over 1700℃, which can effectively prevent the heat from leaking molten steel and slag from being transferred to the water-cooled drag ring body.

[0017] The refractory material is filled by smearing, pouring, or tamping. During filling, ensure the refractory material is uniform and dense, and design the filling thickness reasonably according to actual working conditions and safety requirements. For large converters (over 100t), considering the high temperature inside the furnace and possible steel leakage, the refractory material thickness can be designed to be 50-80mm; for small converters (50t), the thickness can be appropriately reduced to 30-50mm.

[0018] Among them, the heat insulation net 3 and refractory materials are used to prevent the high-temperature substances splashed from the converter 1 from burning through the water-cooled drag ring 2.

[0019] In some embodiments, the mesh shape of the insulation mesh is a regular rhombus or square. The size is designed according to the actual situation, with the side length generally between 20 and 50 mm. This mesh design ensures both the structural strength of the insulation mesh itself and provides good adhesion points for refractory materials.

[0020] In some embodiments, the heat insulation mesh 3 is a high-temperature resistant, high-strength metal mesh or a high-temperature resistant ceramic fiber mesh.

[0021] In some embodiments, for large converters with a capacity of 100t or more, considering the high temperature inside the furnace and the possible amount of steel leakage, the refractory material filling thickness is designed to be 50-80mm; for small converters with a capacity of 50t, the filling thickness is reduced to 30-50mm to ensure that the filling thickness meets the actual working conditions and safety requirements.

[0022] This utility model discloses an installation method for a converter with a water-cooled drag ring anti-leakage function, comprising the following: The annular water-cooled drag ring 2 is installed around the outer periphery of the middle part of the converter 1 to ensure that it can support the furnace body of the converter 1 and meet the tilting requirements; A ring-shaped heat insulation mesh 3 is installed on the outer side of the water-cooled drag ring 2 at the position of the converter inverted surface and the steel tapping surface, using full welding or segmented welding. Then, the refractory material is evenly and densely filled into the mesh of the insulation mesh by means of coating, pouring, or tamping. According to the size of the converter, a suitable refractory material is selected, such as high-alumina or corundum refractory materials (refractory temperature of 1700℃ or above).

[0023] If full welding is chosen, continuous welding is required along the contact edge between the insulation mesh and the water-cooled drag ring to ensure the connection is sealed and strong. If segmented welding is used, welding is performed at certain intervals to reduce the amount of welding work and the heat-affected zone while ensuring the connection strength.

[0024] During normal converter operation, the water-cooled drag ring maintains a suitable temperature through internal cooling water circulation. The insulation mesh and refractory materials are in standby mode, continuously protecting the water-cooled drag ring. Regularly inspect the welded joints between the insulation mesh and the water-cooled drag ring for firmness, cracks, or detachment; check the refractory materials for damage, detachment, or carbonization. If problems are found, promptly repair the welded joints and repair or refill the refractory materials to ensure the reliability and stability of the protective structure.

[0025] When a converter leak occurs, the leaking molten steel and slag first come into contact with the refractory material. The refractory material blocks most of the heat from being transferred to the water-cooled drag ring. The heat insulation mesh supports the refractory material and enhances the mechanical strength of the protective structure, preventing the water-cooled drag ring from burning through. After the accident is handled, a comprehensive inspection of the protective structure is conducted, and repairs or replacements are made according to the extent of the damage to ensure the safe operation of the converter in the future.

Claims

1. A converter with a water-cooled drag ring anti-leakage function, characterized in that, Including an annular water-cooled drag ring (2) set around the outer periphery of the middle part of the converter (1); A heat insulation net (3) is provided on the outer side of the water-cooled drag ring (2) and at the position of the inverted furnace surface and the tapping surface of the converter (1); each heat insulation net (3) is a ring structure and the mesh of the heat insulation net (3) is filled with refractory material. The heat insulation net (3) and refractory material are used to prevent the high-temperature substances splashed from the converter (1) from burning through the water-cooled drag ring (2).

2. A converter with water-cooled drag ring anti-leakage function as described in claim 1, characterized in that, The mesh shape of the insulation net is a regular rhombus or square.

3. A converter with water-cooled drag ring anti-leakage function as described in claim 1 or 2, characterized in that, The heat insulation mesh (3) is a high-temperature resistant and high-strength metal mesh or a high-temperature resistant ceramic fiber mesh.

4. A converter with water-cooled drag ring anti-leakage function as described in claim 3, characterized in that, For large converters with a capacity of 100t or more, the refractory material filling thickness is 50-80mm; for small converters with a capacity of 50t or less, the refractory material filling thickness is 30-50mm.

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