Protection device for crystallizer wire feeding

Abstract

The utility model discloses a protection device for wire feeding of a crystallizer. Belongs to the technical field of wire feeding protection in the production process of industries such as steel and iron, and mainly comprises an L-shaped metal conduit, the length of a long section of the metal conduit is 800mm, an opening is a wire feeding position, the length of a short section of the metal conduit is 300mm, an outlet is shrunk and is connected with a ceramic sleeve, and the long section and the short section are in arc transition; one section is a T-shaped ceramic sleeve with the length of 350mm, one section is thick, and the other section is thin; wherein the thick end is connected with the short end of the metal conduit, and the thin end is inserted into molten steel during use. The structure and the device are simple and practical, and the metal conduit and the ceramic sleeve are combined for use to guide the silk thread to stably enter molten steel, so that the silk thread is prevented from damaging a crystallizer, and the silk thread is prevented from bringing casting powder and air into the molten steel; 2, the whole device is connected with a wire feeder guide pipe through a screw, and is convenient to disassemble and replace;

Description

Technical Field

[0001] The utility model belongs to the field of wire feeding protection in the production process of steel and other industries, and relates to a protection device for wire feeding of a crystallizer. Background Art

[0002] In the production process of the steel industry, in order to improve the internal quality of the product, a process of feeding wire into the continuous casting crystallizer has been developed. For example, pure iron wire is fed to accelerate the cooling of molten steel in the crystallizer, improve the equiaxed grains of the ingot, reduce shrinkage holes, looseness, segregation and other problems, or alloy wire is fed to achieve alloying at the solidification front in the crystallizer.

[0003] In actual applications, the wire feeder guide tube is a straight tube type. The wire is fed directly above the crystallizer. Due to the irregular movement of the wire, the feeding position will have a large deviation, which is likely to damage the inner surface of the crystallizer and cause damage to the inner wall of the crystallizer. At the same time, the wire passes through the protective slag layer from the air and enters the molten steel of the crystallizer, which is easy to bring the protective slag and air into the molten steel, causing the molten steel to be contaminated.

[0004] Therefore, it is necessary to provide a protective device for wire feeding of a crystallizer to achieve a stable, continuous and side-effect-free wire feeding process. Utility Model Content

[0005] Purpose of the utility model: The purpose of the utility model is to provide a protective device for wire feeding into a crystallizer, which solves the problem that the position of the wire entering the molten steel is unstable during the wire feeding process into the crystallizer, affecting the safety of the crystallizer; and solves the problem that the protective slag and air on the surface of the molten steel in the crystallizer are brought into the molten steel during the wire feeding process.

[0006] The technical solution of the utility model is: a protective device for feeding wires to a crystallizer according to the utility model comprises an L-shaped metal conduit (1) and a ceramic sleeve (2) connected to each other, wherein one end of the L-shaped metal conduit (1) is inserted into the ceramic sleeve (2).

[0007] Furthermore, the ceramic sleeve (2) is a zirconia ceramic tube.

[0008] Furthermore, the length of the long section of the metal conduit (1) is 800 mm, one end of the long section is an opening, and the opening is a position for the wire to enter;

[0009] The short section of the metal conduit (1) is 300 mm in length, one end of the short section is an outlet, the outlet is contracted and connected to the ceramic sleeve (2).

[0010] Furthermore, the long section and the short section are transitioned through an arc.

[0011] Furthermore, the ceramic sleeve (2) is 350 mm long and is T-shaped, with one section being a thick end and having a length of 200 mm and one section being a thin end and having a length of 150 mm.

[0012] The thick end is connected to the short end of the metal conduit (1), and the thin end is inserted into the molten steel when in use.

[0013] Furthermore, the outer diameter of the short end of the metal conduit (1) is matched to the inner diameter of the thick end of the ceramic sleeve (2).

[0014] Furthermore, a wire feeding conduit of a wire feeder is arranged at one end of the long section close to the metal conduit (1), and the long section is connected to the wire feeding conduit of the wire feeder via a screw thread.

[0015] Beneficial effects: Features of the utility model: 1. The structure and device of the utility model are simple and practical. Through the combined use of the metal conduit and the ceramic sleeve, the wire is guided to enter the molten steel stably, which prevents the wire from damaging the crystallizer and also prevents the wire from bringing in protective slag and air into the molten steel; 2. The whole device is connected to the wire feeding machine conduit through a screw mouth, which is convenient for disassembly and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] In the figure: 1. Metal conduit; 2. Ceramic sleeve. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] As shown in the figure, the protective device for feeding wire to a crystallizer described in the utility model is mainly composed of: an L-shaped metal conduit 1, the long section of the metal conduit 1 is 800 mm long, and its opening is the wire entry position; the short section is 300 mm long, its outlet is contracted, and is connected to the ceramic sleeve 2, and the long section and the short section are connected through an arc.

[0020] A section of ceramic sleeve 2 (zirconia ceramic tube) is 350 mm long and is in a T-shape, with one section thick and one section thin. The thick end is connected to the short end of the metal conduit 1, and the thin end is inserted into the molten steel during use.

[0021] The working process is summarized as follows:

[0022] 1. The long section is connected to the wire feeding duct of the wire feeding machine through a screw mouth;

[0023] 2. Adjust the position so that the thin section of the ceramic sleeve 2 is inserted into the molten steel by about half (75mm);

[0024] 3. Start the wire feeder, and the wire goes into the ceramic sleeve 2 along the metal guide tube 1, and then into the molten steel. Because the inner cavity of the ceramic sleeve 2 isolates the air and the protective slag, it can effectively prevent the wire from bringing the air and the protective slag into the molten steel.

[0025] Example 1

[0026] In continuous casting at a steel plant: (1) The long section is connected to the wire feeding guide tube of the wire feeding machine through a screw thread; (2) The position is adjusted so that the thin section of the ceramic sleeve 2 is inserted about halfway (75 mm) into the molten steel; (3) The machine is turned on to allow the wire to flow into the molten steel along the metal guide tube 1 and the ceramic sleeve 2. During use, the wire feeding position is fully controllable, and there is no phenomenon of protective slag and air being drawn into the molten steel.

[0027] Comparing the products produced without and with this equipment, the surface of the steel plates produced by the former was roughened due to the inclusion of protective slag in the molten steel, and flaw detection revealed a large amount of slag inclusions inside. However, after using this equipment, the above adverse phenomena no longer occurred.

[0028] The utility model has a good application prospect and can solve the problems of protection slag entanglement and molten steel pollution caused by feeding wire into a steel continuous casting crystallizer.

Claims

1. A protective device for feeding wire into a crystallizer, characterized in that: It comprises an L-shaped metal conduit (1) and a ceramic sleeve (2) which are connected to each other, wherein one end of the L-shaped metal conduit (1) is inserted into the ceramic sleeve (2).

2. A protective device for feeding wire into a crystallizer according to claim 1, characterized in that: The ceramic sleeve (2) is a zirconia ceramic tube.

3. A protective device for feeding wire into a crystallizer according to claim 1, characterized in that: The length of the long section of the metal conduit (1) is 800 mm, one end of the long section is an opening, and the opening is a position for the wire to enter; The short section of the metal conduit (1) is 300 mm in length, one end of the short section is an outlet, the outlet is contracted and connected to the ceramic sleeve (2).

4. A protective device for feeding wires into a crystallizer according to claim 3, characterized in that: The long section and the short section are transitioned through an arc.

5. A protective device for feeding wires into a crystallizer according to claim 3, characterized in that: The ceramic sleeve (2) is 350 mm long and is T-shaped, with one thick end having a length of 200 mm and one thin end having a length of 150 mm. The thick end is connected to the short end of the metal conduit (1), and the thin end is inserted into the molten steel when in use.

6. A protective device for feeding wires into a crystallizer according to claim 5, characterized in that: The outer diameter of the short end of the metal conduit (1) matches the inner diameter of the thick end of the ceramic sleeve (2).

7. A protective device for feeding wires into a crystallizer according to claim 2, characterized in that: A wire feeding conduit of a wire feeder is arranged at one end of the long section close to the metal conduit (1), and the long section is connected to the wire feeding conduit of the wire feeder via a screw thread.

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