CN213172435U

CN213172435U - Durable RH refining dip pipe

Info

Publication number: CN213172435U
Application number: CN202021683931.3U
Authority: CN
Inventors: 汪洪峰; 李双江; 李哲
Original assignee: Hegang Leting Steel Co Ltd
Current assignee: Hegang Leting Steel Co Ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-05-11
Anticipated expiration: 2030-08-13

Abstract

The utility model relates to a concise dip pipe of durable RH belongs to the concise technical field of metallurgical industry molten steel. The technical scheme is as follows: steel courage (6) are one section steel pipe, and the upper end of steel courage (6) is connected with circulating pipe (8) through flange (7), is equipped with on the lower extreme circumferencial direction of steel courage (6) and consolidates rod iron (4), has built by laying bricks or stones on the inner wall of steel courage (6) and has resisted firebrick (9), all is equipped with thermal insulation material (5) and strengthening rib (2) on the surface of steel courage (6) and the lower extreme terminal surface, strengthening rib (2) are the V type, and pouring material (3) are poured on the lower extreme terminal surface of steel courage (6), surface and reinforcement rod iron (4), constitute dip pipe (1). The utility model has the advantages that: the cracking of the fire-resistant layer caused by the expansion of the steel container can be reduced, the peeling of the fire-resistant layer inside and outside the steel container and the falling of a brick body which is washed by molten steel in the molten steel refining process are avoided, the service life of the dip pipe is prolonged, and the casting blank quality is improved.

Description

Durable RH refining dip pipe

Technical Field

The utility model relates to a concise dip pipe of durable RH belongs to the concise technical field of metallurgical industry molten steel.

Background

The RH refining comprises dipping pipes for sucking and discharging molten steel, a vacuum tank and a vacuum exhaust system, when the molten steel is treated, the two dipping pipes are firstly dipped into a steel ladle, so that the steel ladle and a vacuum chamber form a closed system, and then the vacuum exhaust system is started, so that the vacuum chamber forms vacuum. At this time, a gas (nitrogen or argon) was blown from one dip tube. According to the bubble pump principle, molten steel is blown into a vacuum vessel and splashed. After the molten steel is degassed in the vacuum chamber, the molten steel flows back into the ladle from the dip pipe on the other side due to the self weight of the molten steel. Thus, the molten steel continuously enters the vacuum chamber from the ladle and then returns to the ladle from the vacuum chamber, and a continuous circulating current is formed until the vacuum state in the vacuum chamber is broken and returns to an atmospheric pressure. Molten steel continuously entering the vacuum chamber is continuously degassed in a vacuum state.

The conventional dip pipe is made of cylindrical magnesia-chrome lining bricks and an outer layer of high-alumina casting material, and the dip pipe is the part with the largest temperature change when no special heating is carried out. In particular, the refractory material on the outer side of the dip pipe is easily immersed in slag at a position where cracks are generated by repeated expansion and contraction. In the case of thermal spalling, structural spalling is increased again, and thus a spalling phenomenon is seen at the lower portion thereof, seriously affecting the durability and service life of the dip tube. Therefore, how to improve the durability and prolong the service life of the dip pipe is always a hot technical research issue for related scientific research and engineering technicians.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a refined dip pipe of durable RH can prolong the life of dip pipe, improves the casting blank quality, solves the problem that exists among the background art.

The technical scheme of the utility model is that:

the utility model provides a durable RH refines dip pipe, contains strengthening rib, pouring material, reinforcement rod iron, thermal insulation material, steel courage and resistant firebrick, and the steel courage is one section steel pipe, and the upper end of steel courage is connected with the circulating pipe through flange, is equipped with the reinforcement rod iron on the lower extreme circumferencial direction of steel courage, has built by laying bricks or stones on the inner wall of steel courage, all is equipped with thermal insulation material and strengthening rib on the surface of steel courage and the lower extreme terminal surface, the strengthening rib is the V type, and the pouring material is poured on the lower extreme terminal surface of steel courage, surface and reinforcement rod iron, and strengthening rib, pouring material, reinforcement rod iron, thermal insulation material, steel cour.

The reinforcing ribs on the outer surface of the steel liner are of two types with different lengths, and the two types of reinforcing ribs with different lengths are alternately arranged.

The refractory bricks built on the inner wall of the steel container comprise a plurality of layers of bricks from top to bottom, the bricks in each layer adopt a building form of crossing horizontally and vertically, and two adjacent layers of bricks are mutually meshed to form a whole.

The reinforcing steel bar on the circumferential direction of the lower end of the steel liner is a round bar with the diameter of 50-60 mm, and the reinforcing steel bar is welded on the steel liner.

The thickness of the heat insulation material on the outer surface and the lower end face of the steel liner is 2-3 mm.

The utility model has the advantages that: the cracking of the fire-resistant layer caused by the expansion of the steel container can be reduced, the peeling of the fire-resistant layer inside and outside the steel container and the falling of a brick body which is washed by molten steel in the molten steel refining process are avoided, the service life of the dip pipe is prolonged, and the casting blank quality is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

in the figure: the device comprises a dip pipe 1, a reinforcing rib 2, a pouring material 3, a reinforcing steel bar 4, a heat insulation material 5, a steel liner 6, a connecting flange 7, a circulating pipe 8 and refractory bricks 9.

Detailed Description

The invention will be further explained by way of example with reference to the accompanying drawings.

Referring to the attached figure 1, the durable RH refining dip pipe comprises a reinforcing rib 2, a castable 3, a reinforcing steel bar 4, a heat insulating material 5, a steel liner 6 and refractory bricks 9, wherein the steel liner 6 is a section of steel pipe, the upper end of the steel liner 6 is connected with a circulating pipe 8 through a connecting flange 7, the reinforcing steel bar 4 is arranged on the lower end of the steel liner 6 in the circumferential direction, the refractory bricks 9 are laid on the inner wall of the steel liner 6, the heat insulating material 5 and the reinforcing rib 2 are arranged on the outer surface and the lower end face of the steel liner 6, the reinforcing rib 2 is V-shaped, the castable 3 is poured on the lower end face, the outer surface and the reinforcing steel bar 4 of the steel liner 6, and the reinforcing rib 2, the castable 3, the reinforcing steel bar 4, the heat insulating material 5, the steel liner 6 and the.

In this embodiment, referring to fig. 1, the reinforcing rib 2 has a diameter of 50 mm and is V-shaped, and the reinforcing rib 2 is an anchor member and is welded and fixed to the outer surface and the lower end surface of the steel liner 6. The reinforcing ribs 2 on the outer surface of the steel liner 6 comprise two reinforcing ribs 2 with lengths of 15mm and 10mm, the two reinforcing ribs 2 with different lengths are alternately arranged, and the center distance between every two adjacent reinforcing ribs 2 is 145 mm.

The reinforcing steel bar 4 on the circumferential direction of the lower end of the steel liner 6 is a round bar with the diameter of 50-60 mm, the reinforcing steel bar 4 is welded on the steel liner 6, and the reinforcing steel bar 4 can prevent the lower end of the steel liner 6 from deforming.

The thickness of the heat insulation material 5 on the outer surface and the lower end face of the steel container 6 is 2-3 mm, the heat insulation material 5 adopts a nanometer refractory coating, and the heat insulation material 5 can obviously inhibit the temperature rise of the steel container 6 and prevent the deformation of the steel container 6.

The firebricks 9 built on the inner wall of the steel container 6 comprise a plurality of layers of bricks from top to bottom, the bricks in each layer adopt a building form of horizontal and vertical intersection, two adjacent layers of bricks are mutually engaged to form a whole, and the building form is also a common building mode in buildings.

Claims

1. A durable RH refining dip tube characterized by: comprises reinforcing ribs (2), castable (3), a reinforced steel bar (4), heat insulation materials (5), a steel liner (6) and refractory bricks (9), wherein the steel liner (6) is a section of steel pipe, the upper end of the steel liner (6) is connected with a circulating pipe (8) through a connecting flange (7), the reinforced steel bar (4) is arranged on the lower end of the steel liner (6) in the circumferential direction, the refractory bricks (9) are laid on the inner wall of the steel liner (6), the heat insulation materials (5) and the reinforcing ribs (2) are arranged on the outer surface and the lower end face of the steel liner (6), the reinforcing rib (2) is V-shaped, the pouring material (3) is poured on the end face and the outer surface of the lower end of the steel liner (6) and the reinforcing steel bar (4), and the reinforcing rib (2), the pouring material (3), the reinforcing steel bar (4), the heat insulation material (5), the steel liner (6) and the refractory brick (9) form an integrated structure to form the dip pipe (1).

2. A durable RH refining dip tube according to claim 1, wherein: the reinforcing ribs (2) on the outer surface of the steel liner (6) are of two types with different lengths, and the reinforcing ribs (2) with the two types with different lengths are alternately arranged.

3. A durable RH refining dip tube according to claim 1, wherein: the refractory bricks (9) built on the inner wall of the steel container (6) comprise a plurality of layers of bricks from top to bottom, the bricks in each layer adopt a transverse and vertical crossed building mode, and two adjacent layers of bricks are mutually meshed to form a whole.

4. A durable RH refining dip tube according to claim 1, wherein: the reinforcing steel bar (4) on the circumferential direction of the lower end of the steel liner (6) is a round bar with the diameter of 50-60 mm, and the reinforcing steel bar (4) is welded on the steel liner (6).

5. A durable RH refining dip tube according to claim 1, wherein: the thickness of the heat insulation material (5) on the outer surface and the lower end face of the steel liner (6) is 2-3 mm.