Argon blowing device for crystallizer

Abstract

The argon blowing device comprises a crystallizer body, a crystallizer upper opening, a submersed nozzle and an argon blowing mechanism, the crystallizer body is of a hollow cuboid structure, the crystallizer upper opening is formed in the top of the crystallizer body, the submersed nozzle is vertically arranged in the middle of the crystallizer upper opening, and the argon blowing mechanism is placed at the position of the crystallizer upper opening. The argon blowing mechanism comprises a steel pipe frame, a steel pipe opening, a metal hose, a ball valve and a supporting assembly, the argon blowing device has the advantages of being novel in structural design, convenient to use, low in manufacturing cost, easy and not tedious to operate, small in maintenance amount and the like, only a small number of workers are needed for daily maintenance and point inspection, and the manual maintenance cost is reduced; and meanwhile, the crystallizer can be filled with argon during casting before casting, the argon atmosphere is kept, molten steel is protected by argon all the time although the molten steel is not covered with casting powder in the casting process, secondary oxidation of the molten steel at the moment is prevented, and the quality of a head blank is obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting, in particular to an argon blowing device for a crystallizer. Background Art

[0002] Argon is widely used in continuous casting protection casting because it is an inert gas to molten steel and does not chemically react with the active elements in the molten steel. As a protective gas from the ladle to the tundish or from the tundish to the crystallizer, it can effectively prevent secondary oxidation and play a role in protecting casting. Blowing argon in the crystallizer is mainly used in the casting process to further float the inclusions in the molten steel and achieve the purpose of purifying the molten steel.

[0003] During the continuous casting process, molten steel flows from the tundish into the crystallizer through the submerged nozzle. Since there is no protective slag in the crystallizer at this time, the molten steel is in direct contact with the air and is oxidized. At this time, the cast billet is severely oxidized, and the surface and internal qualities are seriously unsatisfactory, so it can only be scrapped. Especially for the casting of high-grade steel, the first billet is not only scrapped, but there have even been production accidents caused by severe oxidation of the molten steel during the pouring process, resulting in cracks and subsequent steel leakage. Therefore, it is particularly important to take protective measures to prevent secondary oxidation of the molten steel during the pouring. Utility Model Content

[0004] The purpose of the utility model is to provide a crystallizer argon blowing device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a crystallizer argon blowing device, comprising a crystallizer body, a crystallizer upper opening, an immersed water inlet and an argon blowing mechanism, the crystallizer body adopts a hollow rectangular structure, the crystallizer upper opening is opened on the top of the crystallizer body, the immersed water inlet is vertically arranged in the middle of the crystallizer upper opening, and the argon blowing mechanism is placed at the crystallizer upper opening.

[0006] Preferably, the present application provides an argon blowing device for a crystallizer, wherein the argon blowing mechanism includes a steel pipe frame, a steel pipe opening, a metal hose, a ball valve and a support assembly, the steel pipe frame is made of a steel pipe, the steel pipe has a diameter of 20 mm, the size of the steel pipe frame is slightly smaller than the size of the upper mouth of the crystallizer, an opening is set on one side of the steel pipe frame, the size of the opening is larger than the diameter of the immersion water outlet, the metal hose is connected to the steel pipe frame, a ball valve is installed on the metal hose, and the support assembly is installed on the front and rear sides of the steel pipe frame.

[0007] Preferably, the present application provides a crystallizer argon blowing device, wherein the support components are arranged in four groups, wherein two groups of support components are arranged on the front side of the steel tube frame and on both sides of the opening, and the other two groups of support components are arranged on the rear side of the steel tube frame.

[0008] Preferably, the present application provides a crystallizer argon blowing device, wherein each group of the supporting components includes a sleeve, a screw and a nut, the sleeve is vertically welded to the outer wall of the steel pipe frame, the inner end of the screw is welded to the sleeve, and the nut is threadedly installed on the outer end of the screw. After the nut is threadedly installed on the screw, the inner side of the nut is tightly against the outer wall of the crystallizer body.

[0009] Preferably, the crystallizer argon blowing device provided in the present application further includes a lifting bracket, and the lifting bracket is bridged on both sides of the steel pipe frame.

[0010] Preferably, the present application provides a crystallizer argon blowing device, wherein steel pipe openings are opened on the steel pipe frame every 100 mm, the steel pipe openings have a diameter of 8 mm, and the opening direction of the steel pipe openings is downward.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] (1) The utility model has the characteristics of novel structural design, convenient use, low manufacturing cost, simple and uncomplicated operation, and low maintenance. Only a small number of personnel are required for daily maintenance and inspection, which reduces the labor maintenance cost; at the same time, the crystallizer can be filled with argon before pouring and maintain an argon atmosphere. Although the molten steel is not covered with protective slag during the pouring process, it is always protected by argon, preventing the molten steel from secondary oxidation at this time, thereby significantly improving the quality of the head billet.

[0013] (2) In the present invention, the support assembly installed on the steel pipe frame is easy to adjust and can improve the stability of the placement of the argon blowing assembly, further improving the argon blowing efficiency.

[0014] (3) In the utility model, holes are opened around the steel tube frame to blow argon, which can make the argon gas in the crystallizer more uniform and free of dead spots, thereby improving the quality of the head blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the crystallizer body of the utility model;

[0016] Figure 2 This is a schematic diagram of the installation of the argon blowing component of the utility model;

[0017] Figure 3 This is a schematic diagram of the partial structure of the argon blowing component of the utility model;

[0018] In the figure: crystallizer body 1, crystallizer upper mouth 2, immersion water inlet 3, argon blowing mechanism 4, steel pipe frame 5, steel pipe opening 6, metal hose 7, ball valve 8, opening 9, sleeve 10, screw 11, nut 12, lifting bracket 13. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0023] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that can be implemented in this application, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this application without affecting the effects that can be produced by this application and the purposes that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of narration, and are not used to limit the scope of the implementation of this application. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of this application without substantial change in the technical content.

[0024] See also Figure 1-3The utility model provides a technical solution: a crystallizer argon blowing device, comprising a crystallizer body 1, a crystallizer upper port 2, an immersed water inlet 3 and an argon blowing mechanism 4, the crystallizer body 1 adopts a hollow rectangular parallelepiped structure, the crystallizer upper port 2 is opened on the top of the crystallizer body 1, the immersed water inlet 3 is vertically arranged in the middle of the crystallizer upper port 2, and the argon blowing mechanism 4 is placed at the crystallizer upper port 2.

[0025] In the utility model, the argon blowing mechanism 4 includes a steel pipe frame 5, a metal hose 7, a ball valve 8 and a support assembly. The steel pipe frame 5 is made of steel pipe, the steel pipe has a diameter of 20 mm, the size of the steel pipe frame 5 is slightly smaller than the size of the upper mouth 2 of the crystallizer, an opening 9 is arranged on one side of the steel pipe frame 5, the size of the opening 9 is larger than the diameter of the immersion water inlet 3, the metal hose 7 is connected to the steel pipe frame 5, the other end of the metal hose 7 is connected to the argon pipeline, the metal hose and the steel pipe frame 5 are filled with argon, the switch and the gas volume are controlled by a ball valve, the ball valve 8 is installed on the metal hose 7, and a steel pipe opening 6 is opened every 100 mm on the steel pipe frame, the steel pipe opening 6 has a diameter of 8 mm, and the opening direction of the steel pipe opening 6 is downward, so that the argon gas can flow smoothly into the crystallizer; the support assembly is installed on the front and rear sides of the steel pipe frame 5; four groups of support assemblies are arranged, among which two groups of support assemblies are arranged on the front side of the steel pipe frame 5 and on both sides of the opening, and the other two groups of support assemblies are arranged on the rear side of the steel pipe frame 5.

[0026] Each group of the support components includes a sleeve 10, a screw 11 and a nut 12, wherein the sleeve 10 is vertically welded to the outer wall of the steel pipe frame 5, the inner end of the screw 11 is welded to the sleeve 10, and the nut 12 is threadedly installed on the outer end of the screw 11. After the nut 12 is threadedly installed on the screw 11, the inner side of the nut 12 is tightly attached to the outer wall of the crystallizer body 1. In the utility model, the support component installed on the steel pipe frame is easy to adjust, and can improve the stability of the placement of the argon blowing component, and further improve the argon blowing efficiency.

[0027] The utility model further comprises a lifting bracket 13, and the lifting bracket 13 is connected across both sides of the steel pipe frame 5. The provided lifting bracket facilitates the taking and placing of the argon blowing component, thereby improving the convenience of use.

[0028] Working principle: The method of using the utility model is as follows:

[0029] Step 1: After the crystallizer is sealed with the dummy rod, the argon blowing device of the utility model is placed on the upper opening of the crystallizer, and the ball valve is opened to fill the crystallizer with argon gas;

[0030] Step 2: The tundish car drives to the casting position, lowers the tundish so that the submerged nozzle is inserted into the upper mouth of the crystallizer. When pouring, the molten steel in the tundish flows into the crystallizer through the submerged nozzle. During the pouring process, although the molten steel in the crystallizer is not protected by protective slag, the crystallizer is filled with argon gas, which covers the molten steel and prevents secondary oxidation.

[0031] Step 3: After normal pouring, protective slag is added into the crystallizer, the argon blowing device of the utility model is completed, the ball valve is closed, the device is taken out along the frame opening, and placed in a special position, ready for use in the next pouring.

[0032] The utility model discloses an argon blowing device for a crystallizer, which maintains an argon atmosphere in the crystallizer before and during pouring, effectively preventing secondary oxidation of molten steel during the pouring process, significantly improving the quality of the casting head billet, reducing the amount of head billet scrapped by at least 0.5 meters per pouring, and improving the economic benefits.

[0033] To sum up, the utility model has the characteristics of novel structural design, easy use, low manufacturing cost, simple and uncomplicated operation, and small maintenance. Only a small number of personnel are needed to perform daily maintenance and inspection, which reduces the labor maintenance cost; at the same time, the crystallizer can be filled with argon before pouring and the argon atmosphere can be maintained. Although the molten steel is not covered with protective slag during the pouring process, it is always protected by argon to prevent the secondary oxidation of the molten steel at this time, thereby significantly improving the quality of the head billet.

[0034] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by this utility model does not involve improvements to software and methods.

[0035] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A crystallizer argon blowing device, comprising a crystallizer body (1), a crystallizer upper port (2), an immersion water port (3) and an argon blowing mechanism (4), characterized in that: The crystallizer body (1) adopts a hollow rectangular parallelepiped structure. The top of the crystallizer body (1) is provided with a crystallizer upper opening (2). The immersion water inlet (3) is vertically arranged in the middle of the crystallizer upper opening (2). The argon blowing mechanism (4) is placed at the crystallizer upper opening (2). The argon blowing mechanism (4) comprises a steel pipe frame (5), a metal hose (7), a ball valve (8) and a support assembly. The steel pipe frame (5) is made of a steel pipe with a diameter of 20 mm. The size of the steel pipe frame (5) is slightly smaller than the size of the crystallizer upper opening (2). An opening (9) is arranged on one side of the steel pipe frame (5). The size of the opening (9) is larger than the diameter of the immersion water inlet (3). The metal hose (7) is connected to the steel pipe frame (5). The ball valve (8) is installed on the metal hose (7). The support assembly is installed on the front and rear sides of the steel pipe frame (5).

2. The crystallizer argon blowing device according to claim 1, characterized in that: The support components are arranged in four groups, wherein two groups of support components are arranged on the front side of the steel tube frame (5) and on both sides of the opening, and the other two groups of support components are arranged on the rear side of the steel tube frame (5).

3. The crystallizer argon blowing device according to claim 2, characterized in that: Each group of the supporting components comprises a sleeve (10), a screw (11) and a nut (12); the sleeve (10) is vertically welded to the outer wall of the steel pipe frame (5); the inner end of the screw (11) is welded to the sleeve (10); the nut (12) is threadedly mounted on the outer end of the screw (11); after the nut (12) is threadedly mounted on the screw (11), the inner side of the nut (12) is in close contact with the outer wall of the crystallizer body (1).

4. The crystallizer argon blowing device according to claim 1, characterized in that: It also includes a lifting bracket (13), wherein the lifting bracket (13) is connected across two sides of the steel pipe frame (5).

5. The crystallizer argon blowing device according to claim 1, characterized in that: The steel pipe frame is provided with steel pipe openings (6) every 100 mm, the steel pipe openings (6) have a diameter of 8 mm, and the steel pipe openings (6) are opened in a downward direction.

Images