Slag line water gap capable of automatically adjusting slag line sleeve

Abstract

The utility model discloses a slag line water gap capable of automatically adjusting a slag line sleeve, which comprises a water gap body, a circle of slag line sleeve is arranged on the outer wall of the water gap body, the slag line sleeve can freely slide on the water gap body, and a circle of lower limit ring used for limiting the slag line sleeve from sliding out from the lower part is arranged on the water gap body. The density of the slag line sleeve material is smaller than that of molten steel. According to the utility model, by controlling the density of the slag line sleeve and utilizing the buoyancy and gravity of the slag line sleeve, when one position is corroded, the floating slag line sleeve automatically moves downwards due to the gravity factor, and the corrosion position is gradually adjusted.

Description

Technical Field

[0001] The utility model relates to the field of slag line nozzles, in particular to a slag line nozzle capable of automatically adjusting a slag line sleeve. Background Art

[0002] Aluminum-carbon nozzles are refractory casting sleeves installed at the bottom of the tundish in continuous steel casting equipment and inserted below the mold steel level. Their primary function is to prevent secondary oxidation of the tundish stream and molten steel splashing, and to prevent mold slag from being drawn into the molten steel. They also improve the flow and heat distribution of the stream within the mold, thereby promoting uniform growth of the mold shell and facilitating the removal of gases and inclusions from the steel.

[0003] Aluminum carbon nozzles have significant effects on improving billet quality, improving working conditions, stabilizing continuous casting operations, and preventing billet surface defects.

[0004] The slag line of the aluminum carbon nozzle for continuous casting is often corroded by molten protective slag and molten steel. Since the service life of the slag line refractory plays a decisive role in the entire aluminum carbon nozzle, how to improve the service life of the slag line refractory has become a major problem for this product.

[0005] There are two main methods in the industry to increase the service life of slag line refractory materials: the first is to increase the thickness of the material in the slag line area, directly increasing the corrosion resistance time of the product. Since the thickness of the slag line area cannot be increased indefinitely, the upper limit of this method is extremely low; the second is to improve the material in the slag line area. At present, the slag line area in the industry generally uses ZrO2-C materials with good corrosion resistance. In recent years, in the absence of the latest revolutionary results in the development of slag line materials, this method has also reached its limit in improving the service life of slag line refractory materials.

[0006] The slag line material of traditional aluminum carbon nozzle is fixedly pressed on the main material and cannot be freely adjusted.

[0007] Patent No. "CN219004574U" discloses an adjustable slag line nozzle, but the slag line sleeve in the patent still requires workers to adjust the position of the slag line sleeve. Utility Model Content

[0008] The utility model aims to provide a slag line nozzle which can automatically adjust the slag line sleeve.

[0009] The innovation of the present invention is that the density of the slag line sleeve is controlled and the buoyancy and gravity of the slag line sleeve are utilized. When a position is corroded, the floating slag line sleeve automatically moves downward due to gravity, and the corrosion position is gradually adjusted.

[0010] In order to achieve the above-mentioned utility model purpose, the technical solution of the utility model is:

[0011] The slag line nozzle capable of automatically adjusting the slag line sleeve comprises a nozzle body, a circle of slag line sleeves is arranged on the outer wall of the nozzle body, the slag line sleeve can freely slide on the nozzle body, a circle of lower limiting rings for limiting the slag line sleeve from sliding out from the lower part is arranged on the nozzle body, and the density of the slag line sleeve material is less than the density of molten steel.

[0012] Further, the density of the slag line sleeve material is 2-6 g / cm 3 .

[0013] Further, the nozzle body is further provided with a circle of upper limiting rings for limiting the slag line sleeve from sliding out from the upper part.

[0014] Further, the upper limiting ring and / or the lower limiting ring is provided with a slope surface at one end of the slag line sleeve.

[0015] Further, the length of the slag line sleeve is 5-50 cm.

[0016] Further, the nozzle body is provided with a circle of grooves between the upper limiting ring and the lower limiting ring, and the inner diameter of the slag line sleeve is greater than the outer diameter of the groove.

[0017] Further, the inner diameter of the slag line sleeve is 0.5-5 mm greater than the outer diameter of the groove.

[0018] Further, the length of the groove is 0-5 cm longer than the length of the slag line sleeve.

[0019] Further, the thickness of the slag line sleeve is greater than or equal to 5 mm.

[0020] Further, the slag line sleeve is composed of several segments.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. In the present application, the density of the slag line sleeve is controlled, the buoyancy and gravity of the slag line sleeve are utilized, when corrosion occurs at a position, the slag line sleeve is automatically moved downward due to the gravity, and the corrosion position is gradually adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of example 1.

[0024] Figure 2 It is a change view of the slag line sleeve slowly moving downward after corrosion.

[0025] Figure 3 It is a structural schematic view of example 2. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings.

[0027] Example 1: Figure 1 、 2 As shown, a slag line nozzle with automatically adjustable slag line sleeve comprises a nozzle body 1, a slag line sleeve 2 is provided on the outer wall of the nozzle body 1, the slag line sleeve 2 can slide freely on the nozzle body 1, and a lower limit ring 3 is provided on the nozzle body 1 for limiting the slag line sleeve 2 from sliding out from the bottom. The density of the slag line sleeve 2 material is less than the density of molten steel, and the density of the slag line sleeve 2 material is 2~6g / cm 3 The length of the slag line sleeve 2 is 5 to 50 cm, the inner diameter of the slag line sleeve 2 is 0.5 to 5 mm larger than the outer diameter of the groove 1.1, and the thickness of the slag line sleeve 2 is greater than or equal to 5 mm.

[0028] The nozzle body 1 is also provided with an upper limit ring 4 for limiting the slag line sleeve 2 from sliding out from the upper part.

[0029] The upper limit ring 4 and / or the lower limit ring 3 are both provided with a slope at one end of the slag line sleeve 2 .

[0030] The nozzle body 1 forms a circle of groove 1.1 between the upper limit ring 4 and the lower limit ring 3. The inner diameter of the slag line sleeve 2 is larger than the outer diameter of the groove 1.1, and the length of the groove 1.1 is 2~5cm longer than the length of the slag line sleeve 2.

[0031] Example 2: Referring to Example 1, Figure 3 As shown, the slag line sleeve 2 is composed of several sections.

[0032] The embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A slag line nozzle with an automatically adjustable slag line sleeve, comprising a nozzle body, wherein a slag line sleeve is provided on the outer wall of the nozzle body, characterized in that: The slag line sleeve can slide freely on the nozzle body. The nozzle body is provided with a lower limit ring for limiting the slag line sleeve from sliding out from the bottom. The density of the slag line sleeve material is less than the density of molten steel.

2. The slag line nozzle with automatic adjustment of the slag line sleeve according to claim 1, characterized in that: The density of the slag line cover material is 2 to 6 g / cm 3 .

3. The slag line nozzle with automatic adjustment of the slag line sleeve according to claim 1, characterized in that: The nozzle body is also provided with an upper limit ring for limiting the slag line sleeve from sliding out from the upper part.

4. The slag line nozzle with automatic adjustment of the slag line sleeve according to claim 3, characterized in that: The upper limit ring and / or the lower limit ring are both provided with a slope at one end of the slag line sleeve.

5. The slag line nozzle with automatic adjustment of the slag line sleeve according to claim 1, characterized in that: The length of the slag line sleeve is 5 to 50 cm.

6. The slag line nozzle with automatic adjustment of the slag line sleeve according to claim 3, characterized in that: The nozzle body forms a circle of groove between the upper limit ring and the lower limit ring, and the inner diameter of the slag line sleeve is larger than the outer diameter of the groove.

7. The slag line nozzle with automatic adjustment of the slag line sleeve according to claim 6, characterized in that: The inner diameter of the slag line sleeve is 0.5 to 5 mm larger than the outer diameter of the groove.

8. The slag line nozzle with automatic adjustment of the slag line sleeve according to claim 6, characterized in that: The length of the groove is 0 to 5 cm longer than the length of the slag line sleeve.

9. The slag line nozzle with automatically adjustable slag line sleeve according to claim 1, characterized in that: The thickness of the slag line sleeve is greater than or equal to 5 mm.

10. The slag line nozzle with automatically adjustable slag line sleeve according to claim 1, characterized in that: The slag line sleeve is composed of several sections.

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