Immersed nozzle structure with anti-nodulation function

Abstract

The utility model discloses a submersed nozzle structure with an anti-nodulation function, which relates to the technical field of steel continuous casting and comprises a barrel, a water inlet is fixedly connected to the upper end of the barrel, a refractory material layer is arranged on the inner side wall of the barrel, a buffer layer is arranged on one side, far away from the barrel, of the refractory material layer, and a water outlet is formed in the other side of the barrel. A protective coating layer is arranged on the side, away from the refractory material layer, of the buffer layer, two mounting grooves are formed in the lower end of the barrel, an annular groove is formed in the outer side wall of the barrel and located above the two mounting grooves, and a slag line ring is arranged in the annular groove in a sleeved mode. According to the nozzle, fluid resistance and impurity deposition are effectively reduced, nodulation or blockage of the inner wall of the nozzle is reduced, and smelting efficiency and safety are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel material continuous casting technical field especially relates to a submerged entry nozzle structure with anti-nodular function. BACKGROUND

[0002] The main function of submerged entry nozzle is to prevent secondary oxidation and splashing of molten steel, improve the flow state and heat flow distribution of injection flow in crystallizer, so as to promote the uniform growth of the shell in the crystallizer, and be beneficial to the removal of gas and inclusions in steel.

[0003] In the existing submerged entry nozzle, nodular or blocking material often forms on the inner wall of the nozzle during continuous casting, which may be derived from the deoxidation product of the smelting process, the reaction product of molten steel and refractory material or the secondary oxidation product caused by gas absorption. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a submerged entry nozzle structure with anti-nodular function to solve the shortcomings in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A submerged entry nozzle structure with anti-nodular function, comprising a cylinder, the upper end of the cylinder is fixedly connected with a water inlet, the inner side wall of the cylinder is provided with a refractory layer, the side, away from the cylinder, of the refractory layer is provided with a buffer layer, the side, away from the refractory layer, of the buffer layer is provided with a protective coating layer, two installation grooves are formed in the lower end of the cylinder, an annular groove is formed in the outer side wall of the cylinder, the annular groove is located above the two installation grooves, and a slag line ring is sleeved in the annular groove.

[0007] As a further improvement of the utility model, the main material of the refractory layer is zirconia, which has a high melting point, good chemical stability and corrosion resistance.

[0008] As a further improvement of the utility model, the protective coating layer is inorganic silicate coating, which can form a hard silicate protective layer at high temperature, and has excellent high-temperature resistance, acid and alkali resistance, wear resistance and other properties.

[0009] As a further improvement of the utility model, the buffer layer mainly uses cement mortar, which plays a buffering and transitional role, and has good thermal stability and certain elasticity.

[0010] As a further improvement of the utility model, a reinforcing structure layer is arranged between the refractory layer and the cylinder, which can increase the structural strength, improve the overall stability and service life of the nozzle against slag.

[0011] As a further improvement of the utility model, the water inlet is funnel-shaped structure, the water inlet is internally threaded with guide strip.

[0012] The utility model discloses the beneficial effect:

[0013] The funnel-shaped structure is arranged, and the water flow introduction efficiency is optimized, and fluid resistance is reduced, the guide strip not only plays a guiding role, but also can effectively prevent the secondary oxidation product of the deoxidation product in the smelting process, the reaction product of molten steel and refractory or the impurity such as getter, thereby maintaining the water flow unobstructed, and the phenomenon of nodule or blockage of the inner wall of the water gap is significantly reduced.

[0014] The refractory material layer, the buffer layer and the protective coating layer are arranged, and the multi-layer protection structure design effectively reduces the direct contact of molten steel and refractory, reduces the generation of reaction product, thereby reducing the nodule or blockage of the inner wall of the water gap.

[0015] The utility model effectively reduces fluid resistance and impurity deposition, reduces the nodule or blockage of the inner wall of the water gap, improves smelting efficiency and safety. DRAWINGS

[0016] Figure 1 The utility model discloses a kind of structure schematic diagram of submerged entry nozzle structure with anti-nodule function proposed by the utility model;

[0017] Figure 2 The utility model discloses a kind of structure schematic diagram of submerged entry nozzle structure with anti-nodule function proposed by the utility model, and the structure schematic diagram of partial section of front view angle;

[0018] Figure 3 For Figure 2 Enlarged view at A.

[0019] In the drawing: 1 barrel, 2 water inlet, 3 guide strip, 4 slag line ring, 5 installation slot, 6 first hemisphere, 7 second hemisphere, 8 third hemisphere, 9 annular groove, 10 refractory material layer, 11 buffer layer, 12 protective coating layer, 13 reinforcing structure layer. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0021] Figures 1-3The utility model provides an anti-clogging submerged nozzle structure, comprising a barrel 1, a water inlet 2 fixedly connected to the upper end of the barrel 1, the water inlet 2 being funnel-shaped to optimize water flow introduction efficiency and reduce fluid resistance, a guide strip 3 provided with internal threads in the water inlet 2, the guide strip 3 not only serving as a guide but also effectively preventing impurities from depositing and maintaining smooth water flow, a refractory material layer 10 provided on the inner side wall of the barrel 1, the refractory material layer 10 being mainly made of zirconia, which is widely used as a protective barrier in extremely high-temperature environments due to its high melting point, good chemical stability, and excellent corrosion resistance, a buffer layer 11 provided on the side of the refractory material layer 10 away from the barrel 1, the buffer layer 11 being mainly made of special cement mortar, which not only provides necessary buffering and transition functions but also endows the structure with good thermal stability and a certain degree of elasticity to effectively resist cracking caused by thermal stress, and a protective coating layer 12 provided on the side of the buffer layer 11 away from the refractory material layer 10, the protective coating layer 12 being inorganic silicate coating, which can rapidly solidify under high-temperature environments to form a dense and hard silicate protective layer, which not only has excellent high-temperature resistance, acid and alkali resistance, and wear resistance but also effectively insulates external corrosive media to protect the internal structure from damage.

[0022] A reinforcing structure layer 13 is provided between the refractory material layer 10 and the barrel 1, the reinforcing structure layer 13 being made of high-strength fiber composite material, which greatly increases the overall strength of the structure through precise lamination and curing processes, thereby improving the overall stability and service life of the slag-resistant nozzle, two mounting grooves 5 are provided on the lower end of the barrel 1 for stable connection with downstream equipment or pipelines, and an annular groove 9 is provided on the outer side wall of the barrel 1 above the two mounting grooves 5, the annular groove 9 being sleeved with a slag line ring 4.

[0023] The above description is only a preferred specific embodiment of the utility model, and the protection scope of the utility model is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A submerged nozzle structure having an anti-knotted function, comprising a barrel (1), characterized in that, The upper end of the barrel (1) is fixedly connected with a water inlet (2), the inner side wall of the barrel (1) is provided with a refractory material layer (10), the side, away from the barrel (1), of the refractory material layer (10) is provided with a buffer layer (11), the side, away from the refractory material layer (10), of the buffer layer (11) is provided with a protective coating layer (12), the lower end of the barrel (1) is provided with two mounting grooves (5), the outer side wall of the barrel (1) is provided with an annular groove (9), the annular groove (9) is located above the two mounting grooves (5), and the annular groove (9) is provided with a slag line ring (4).

2. The submerged nozzle structure with anti-knotted function according to claim 1, characterized in that, The main material of the refractory material layer (10) is zirconium oxide, which has a high melting point, good chemical stability and corrosion resistance.

3. The submerged nozzle structure with anti-knotted function according to claim 1, characterized in that, The protective coating layer (12) is inorganic silicate paint, which can form a hard silicate protective layer at high temperature, and has excellent high temperature resistance, acid and alkali resistance, wear resistance and other properties.

4. The submerged nozzle structure with anti-knotted function according to claim 1, characterized in that, The buffer layer (11) is mainly made of cement mortar, which plays a buffering and transitional role, and has good thermal stability and certain elasticity.

5. The submerged nozzle structure with anti-knotted function according to claim 1, characterized in that, The refractory material layer (10) and the barrel (1) are provided with a reinforcing structure layer (13), which can increase the structural strength, improve the overall stability and service life of the slag into the water inlet.

6. The submerged nozzle structure with anti-knotted function according to claim 1, characterized in that, The water inlet (2) is in the shape of a funnel, and the water inlet (2) is provided with a guide strip (3) in the form of a screw thread.

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