CN218836070U - Middle ladle cover of large converter - Google Patents

Abstract

The utility model discloses a be built by contract in big converter relates to steel production facility technical field, and well be built by contract includes installation frame and side frame, and the installation frame inlays and locates in the side frame, and the installation frame is equipped with the P type intake pipe that two sets of P types were laid, and P type intake pipe runs through side frame and inlet end and is located the side frame outside, and the argon blowing outlet duct of a plurality of mutual symmetries is connected to its bottom, and the argon blowing outlet duct runs through the installation frame. The P-type air inlet pipe can separately control the flow and the pressure independently, better meets the requirement of protecting pouring argon blowing, can form a layer of argon protective gas on the surface of molten steel, prevents the oxidation and the pollution of the molten steel, ensures the purity of the poured molten steel and improves the quality of casting blanks.

Description

Middle ladle cover of large converter

Technical Field

The utility model relates to a steel production facility technical field especially relates to a ladle cover in big converter.

Background

In the continuous casting process, the tundish is used as a transition container between the crystallizer and the ladle, and plays roles in storing molten steel, distributing steel flow, stabilizing pouring speed and reducing impact momentum of the pouring flow in the crystallizer. With the increasing requirements on the quality of steel products, people develop and apply a plurality of technologies to purify molten steel. However, purer molten steel is likely to be polluted again after being injected into the tundish, especially in the pouring and pouring processes of the tundish, air is rapidly filled into the tundish after the roaster is lifted, the covering agent is not added completely after pouring, the molten steel level of the tundish is lowered during ladle replacement, and air enters the exposed part of the working layer of the tundish, so that the full-protection pouring effect is damaged, the secondary oxidation of the molten steel is caused, and the cleanliness of the molten steel is influenced.

In order to reduce secondary oxidation of molten steel in a pouring link of a tundish, at present, some enterprises can improve the flowing of the molten steel and promote inclusions to float upwards by installing perforated bricks at the bottom of the tundish and blowing argon into the perforated bricks to form a liquid surface protective layer, but in actual production, argon is easy to flow into a crystallizer along with the molten steel to cause bubbles under a casting blank. Patent CN214601907U discloses an argon blowing protection tundish cover, patent CN113828764A discloses a continuous casting tundish cover and a blowing protection pouring method thereof, patent CN213916085U discloses a tundish cover capable of safely measuring molten steel in a tundish, and argon blowing amount of an impact area (a steel connecting hole area) and a steady flow area (a steel flowing hole, a temperature measurement sampling hole and a mounting hole area) cannot be well controlled and adjusted in a subarea mode in the actual production and use process, and the requirement of protection pouring cannot be met.

At present, the capacity of a tundish is developed towards large tonnage so as to ensure that molten steel has sufficient time to stay in the tundish to promote inclusions to float, and in order to adapt to the partition arrangement of the tundish and achieve the effect of casting protection, the tundish cover of a large converter is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above technical problem, overcome prior art's shortcoming, provide a be built by contract in big converter, well be built by contract includes installation frame and side frame, and in the installation frame inlayed and locates the side frame, the installation frame was equipped with the P type intake pipe that two sets of P fonts were laid, and P type intake pipe runs through side frame and inlet end and is located the side frame outside, and the argon outlet duct that blows of a plurality of mutual symmetries is connected to its bottom, blows the argon outlet duct and runs through the installation frame.

The utility model discloses the technical scheme who further injects is:

the mounting frame is provided with a plurality of holes beneficial to production operation, including a steel connecting hole, a baking hole, a temperature measurement sampling hole, a steel flowing hole and a mounting hole.

The middle ladle cover of the large converter has the P-shaped air inlet pipe with the outer diameter of 22mm and the inner diameter of 18mm.

In the large converter middle ladle cover, the argon blowing air outlet pipes (3) are mutually symmetrical.

The utility model has the advantages that: the P-type air inlet pipe can separately control the flow and the pressure independently, better meets the requirement of protecting pouring argon blowing, can form a layer of argon protective gas on the surface of molten steel, prevents the oxidation and the pollution of the molten steel, ensures the purity of the poured molten steel and improves the quality of casting blanks. The problem that molten steel is secondarily oxidized in the continuous casting and casting process due to the fact that the argon sealing partition adjustment slag wall and the tundish cover are arranged in a split mode in the impact area and the casting steady flow area in the tundish is solved successfully.

Drawings

FIG. 1 is a front view of a tundish cover of a large converter;

FIG. 2 is an internal structural view;

FIG. 3 is an enlarged view of the structure of the area A;

FIG. 4 is an enlarged view of the structure of the area B;

FIG. 5 is a cross-sectional view of the structure of C-C;

FIG. 6 is an enlarged view of the structure of area D;

FIG. 7 is a structural view of the connection between a P-type gas inlet pipe and an argon blowing gas outlet pipe;

FIG. 8 is a bottom view of a tundish cover in a large converter;

FIG. 9 is an enlarged view of the structure of area E;

FIG. 10 is an enlarged view of the structure of the area F;

wherein: 1. a mounting frame; 2. a P-type air inlet pipe; 3. an argon blowing gas outlet pipe; 4. a side frame; 5. connecting steel holes; 6. baking the holes; 7. a temperature measurement sampling hole; 8. a steel flowing hole; 9. a first mounting hole; 10. and a second mounting hole.

Detailed Description

The ladle cover in big converter that this embodiment provided, the structure is shown in the figure, and well ladle cover includes installation frame 1 and side frame 4, and installation frame 1 inlays and locates in side frame 4, and installation frame 1 is equipped with two sets of P types intake pipe 2,P type intake pipe 2 that the P style of calligraphy was laid and is 22mm, internal diameter for 18mm. P type intake pipe 2 runs through side frame 4 and the inlet end is located side frame 4 outsidely, and a plurality of mutual symmetries blow argon outlet duct 3 is connected to its bottom, blows argon outlet duct 3 and runs through installation frame 1. Be equipped with a plurality of holes that do benefit to production operation on the installation frame 1, including connecing steel hole 5, toasting hole 6, temperature measurement thief hole 7, flowing steel hole 8, mounting hole 9, 10.

The mounting frame 1 is integrally cast by using an unshaped refractory material and is formed by low-temperature baking. When the molten steel is required to be blown with argon, the argon is transmitted into the argon blowing outlet pipe 3 through the P-type air inlet pipe 2, the argon blowing outlet pipe 3 blows the argon, a layer of argon protection layer can be formed on the surface of the molten steel, the oxidation and the pollution of the molten steel are prevented, the purity of the molten steel in a tundish is improved, then the flow is independently controlled through the two P-type air inlet pipes 2, the flow of an impact area and the flow of a pouring stable area are independently controlled, and the requirement of protecting pouring is better met.

In addition to the above embodiments, the present invention may have other embodiments; all the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims (4)

1. A middle ladle cover of a large converter is characterized in that: well be built by contract and include installation frame (1) and side frame (4), installation frame (1) inlays to be located in side frame (4), installation frame (1) is equipped with P type intake pipe (2) that two sets of P fonts were laid, P type intake pipe (2) are run through side frame (4) and inlet end are located side frame (4) are outside, and a plurality of argon blowing outlet ducts (3) are connected to its bottom, argon blowing outlet duct (3) run through installation frame (1).

2. The tundish cover of a large converter according to claim 1, wherein: be equipped with a plurality of holes that do benefit to production operation on installation frame (1), including connecing steel hole (5), toast hole (6), temperature measurement thief hole (7), flow steel hole (8), mounting hole.

3. The tundish cover of a large converter according to claim 1, wherein: the outer diameter of the P-shaped air inlet pipe (2) is 22mm, and the inner diameter of the P-shaped air inlet pipe is 18mm.

4. The tundish cover of a large converter according to claim 1, wherein: the argon blowing air outlet pipes (3) are mutually symmetrical.

Images