Blast furnace throat pipe

Abstract

The utility model discloses a blast furnace throat pipe which comprises a throat opening, a transition cylinder and a throat opening protection sleeve, the throat opening is a cylinder with two through ends, and the transition cylinder is connected with the lower end of the throat opening; the throat protection sleeve comprises a throat protection cylinder and a plurality of reinforcing ribs, the throat protection cylinder is coaxially sleeved with the throat and fixedly connected with the inner wall of the throat, the throat protection cylinder is provided with an inner cylinder wall, an outer cylinder wall, a protection cylinder upper end face and a protection cylinder lower end face, and the protection cylinder upper end face extends towards one side of the outer cylinder wall in the circumferential direction to form a first platform; the lower end face of the protection cylinder extends towards one side of the outer cylinder wall in the circumferential direction to form a second platform, the reinforcing ribs are arranged at intervals in the circumferential direction of the outer cylinder wall, and the two ends of each reinforcing rib are fixedly welded to the first platform and the second platform respectively. Direct friction between furnace charge and the wear-resistant lining plate can be prevented, and the service life of the blast furnace throat pipe is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of steel smelting equipment, especially to a blast furnace throat pipe. BACKGROUND

[0002] The blast furnace throat pipe is located between the material flow valve and the lower sealing valve, is the passageway of the furnace charge into the blast furnace, and has a structure comprising a throat, a cylinder and a wear-resistant lining plate. The throat is usually a cylindrical structure with both ends through, the opening diameter gradually decreases from top to bottom, the cylinder is connected with the lower end of the throat, and the axes of the two coincide, which is used for guiding the furnace charge from the throat to the inside of the blast furnace. The wear-resistant lining plate is arranged in the throat along the axial direction to form a ladder-shaped structure. When the furnace charge enters the blast furnace from the top of the furnace, it has a certain speed and kinetic energy. The setting of the blast furnace throat pipe can play a buffering role to reduce the direct impact of the furnace charge on the lining of the top of the furnace, thereby prolonging the service life of the top of the furnace. However, the furnace charge is always washed during discharging, which easily causes the wear-resistant lining plate at the blast furnace throat pipe to be worn out, and even the steel structure of the blast furnace throat pipe can be worn through. In view of this, it is necessary to improve the structure of the blast furnace throat pipe on the production line to improve the service life of the blast furnace throat pipe. SUMMARY

[0003] The utility model provides a blast furnace throat pipe.

[0004] The technical scheme for realizing the utility model is as follows: a blast furnace throat pipe comprises a throat, a transition cylinder and a throat protection sleeve. The throat is a cylindrical structure with both ends through. The transition cylinder is connected with the lower end of the throat. The throat protection sleeve comprises a throat protection cylinder and a plurality of reinforcing ribs. The throat protection cylinder is coaxially sleeved in the throat and fixedly connected with the inner wall of the throat. The throat protection cylinder has an inner cylinder wall, an outer cylinder wall, an upper end face of the protection cylinder and a lower end face of the protection cylinder. The upper end face of the protection cylinder extends a first platform to one side of the outer cylinder wall along the circumference thereof. The lower end face of the protection cylinder extends a second platform to one side of the outer cylinder wall along the circumference thereof. Each reinforcing rib is arranged along the circumference of the outer cylinder wall at intervals. The two ends of each reinforcing rib are respectively welded and fixed to the first platform and the second platform. The first platform is welded and fixed to the throat.

[0005] Further, the throat protection cylinder is a conical cylinder with a large upper end and a small lower end. This makes the flow of material more concentrated.

[0006] The blast furnace throat pipe of the utility model is provided with a throat protection sleeve at the throat. The throat protection sleeve has the advantages of simple structure, easy assembly, high strength and high reliability. When the blast furnace is discharging, the furnace charge enters the material distribution chute through the throat protection sleeve, which can prevent the furnace charge from directly rubbing against the wear-resistant lining plate, thereby prolonging the service life of the blast furnace throat pipe. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1This is a schematic diagram of the main structure of the blast furnace throat tube according to an embodiment of the present utility model;

[0008] Figure 2 This is a schematic diagram of the throat protection sleeve described in an embodiment of the present utility model. Detailed Implementation

[0009] The specific embodiments of the blast furnace throat of this utility model are described in detail below with reference to the accompanying drawings:

[0010] like Figure 1 and Figure 2 As shown, a blast furnace throat includes a throat 1, a transition cylinder 2, and a throat protective sleeve 3. The throat 1 is a cylindrical shape with both ends open. The transition cylinder 2 is connected to the lower end 11 of the throat 1. The throat protective sleeve 3 includes a throat protective cylinder 31 and several reinforcing ribs 32. The throat protective cylinder 31 is coaxially sleeved inside the throat 1 and fixed to the throat 1.

[0011] The throat protection cylinder 31 has an inner cylinder wall 311, an outer cylinder wall 312, an upper end face of the protection cylinder, and a lower end face of the protection cylinder. The upper end face of the protection cylinder extends circumferentially toward the outer cylinder wall 312 to form a first platform 313, and the lower end face of the protection cylinder extends circumferentially toward the outer cylinder wall 312 to form a second platform 314. Each of the reinforcing ribs 32 is arranged circumferentially around the outer cylinder wall 312 at intervals. The two ends of the reinforcing ribs 32 are welded and fixed to the first platform 313 and the second platform 314, respectively. The first platform 313 is welded and fixed to the throat 1.

[0012] During blast furnace charging, the charge enters the charging chute through the smooth inner wall of the throat protective sleeve, resulting in a more concentrated flow and extending the service life of the blast furnace throat. Reinforcing ribs ensure the strength of the throat protective sleeve, making it more durable.

[0013] The shape of the throat protection cylinder described in this utility model is not limited to a conical cylinder, but can also be a cylindrical cylinder. Because the internal space of the throat tube is large, the material flow is not concentrated enough when feeding, which causes the furnace charge to be scattered when entering the chute. When the throat protection cylinder is a conical cylinder with a larger top and a smaller bottom, the material flow can be more concentrated.

[0014] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent process transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A blast furnace throat, characterized in that: It includes a throat, a transition cylinder, and a throat protective sleeve. The throat is a cylindrical shape with both ends open, and the transition cylinder is connected to the lower end of the throat. The throat protective sleeve includes a throat protective sleeve and several reinforcing ribs. The throat protective sleeve is coaxially sleeved inside the throat and fixedly connected to the inner wall of the throat. The throat protective sleeve has an inner cylinder wall, an outer cylinder wall, an upper end face of the protective sleeve, and a lower end face of the protective sleeve. The upper end face of the protective sleeve extends circumferentially toward the outer cylinder wall to form a first platform, and the lower end face of the protective sleeve extends circumferentially toward the outer cylinder wall to form a second platform. The reinforcing ribs are arranged circumferentially around the outer cylinder wall at intervals, and the two ends of the reinforcing ribs are welded and fixed to the first platform and the second platform, respectively. The first platform is welded and fixed to the throat.

2. The blast furnace throat according to claim 1, characterized in that: The throat protection tube is a conical tube that is wider at the top and narrower at the bottom.

Images