CN210280662U

CN210280662U - Lower nozzle brick

Info

Publication number: CN210280662U
Application number: CN201920493537.4U
Authority: CN
Inventors: 张志峰; 徐跃庆; 李宏宇; 梁保青; 王在光; 王全喜; 赵臣瑞; 李爱梅; 王常伟; 关斌斌
Original assignee: Henan Rongjin High Temperature Materials Co ltd
Current assignee: Henan Rongjin High Temperature Materials Co ltd
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2020-04-10
Anticipated expiration: 2029-04-12

Abstract

The utility model relates to a lower nozzle brick, including lower nozzle brick, lower nozzle shell, fire clay layer, the first section and the second section of lower nozzle shell all are equipped with the protruding piece that a plurality of cross-sections are the recess form, protruding piece card is gone into the side of lower nozzle brick, because the cross-section is the protruding piece of recess form and is the face contact down between the nozzle brick lateral wall, compare with traditional cross-section and increased the contact surface for curved arch, consequently be difficult to the slippage and take place the displacement, avoided traditional lower nozzle shell upper cross-section to be curved arch easy and the easy slippage of lower nozzle shell and take place the displacement, and the lower nozzle brick that leads to oozes steel or the bleed-out phenomenon with lower slide seam position and takes place, improved the efficiency of steelworks steelmaking operation.

Description

Lower nozzle brick

Technical Field

The utility model relates to a refractory material technical field especially relates to a lower nozzle brick.

Background

The lower nozzle brick is used as a channel for flowing steel and is matched and connected with a ladle long nozzle to protect casting steel so as to prevent secondary oxidation of molten steel. The lower nozzle is formed by assembling a lower nozzle brick and a lower nozzle steel shell, so that the lower nozzle brick and the lower nozzle steel shell are required to have good scouring resistance, thermal shock stability and high-temperature strength, the assembly quality is very strict, the lower nozzle brick and the steel shell are not tightly combined or mud materials are not full, the steel shell is loosened, and even the serious accident that the lower nozzle brick displaces to cause steel seepage or steel leakage occurs. A plurality of convex blocks with arc-shaped sections are arranged on the circumference of the inner side of the upper half section of the traditional lower nozzle steel shell, when a box is pressed, a lower nozzle steel shell is sleeved on a nozzle after a lower nozzle brick is evenly plastered, and the steel shell is pressed to a specified size by a positioning tool. This kind of assembly method mainly relies on combining pug, box hat messenger's lower nozzle to become a whole, but because the temperature of molten steel is very high in the use, the box hat upper cross-section can't play effective support for curved protruding piece, consequently can lead to lower nozzle box hat can take place the displacement with lower nozzle brick, causes lower nozzle brick and gliding plate seam position to ooze steel or steel leakage, brings very big influence for steel mill normal steelmaking production operation, has reduced production efficiency.

Disclosure of Invention

In order to solve the problem, the utility model provides a lower nozzle brick.

The technical scheme of the utility model is that: the utility model provides a lower nozzle brick, includes lower nozzle brick, lower nozzle steel casing, fire clay layer, its characterized in that: the diameter of the first section of the lower nozzle brick is larger than that of the second section, a steel flowing hole which is through from top to bottom is formed in the middle of the lower nozzle brick, the outer side face of the lower nozzle brick is uniformly coated with one layer of fire clay layer, the lower nozzle steel shell is sleeved on the outer side face of the lower nozzle brick coated with the fire clay layer, the size of the lower nozzle steel shell is matched with that of the outer side face of the lower nozzle brick coated with the fire clay layer, a plurality of protruding blocks with groove-shaped cross sections are uniformly arranged on the inner side face of the first section of the lower nozzle steel shell along the circumference, a plurality of protruding blocks with groove-shaped cross sections are uniformly arranged on the inner side face of the lower half along the circumference, and the protruding blocks with groove-shaped cross sections penetrate through the fire clay layer in the middle of the cross sections and are clamped into the outer side.

Preferably, the number of the convex blocks with the groove-shaped cross section is more than or equal to three.

Preferably, both ends of the lower nozzle steel shell and both ends of the fire clay layer coated on the outer side surface of the lower nozzle brick are flush.

Preferably, a certain distance is reserved between the upper end face of the lower nozzle steel shell and the upper end face of the lower nozzle brick, and a certain distance is reserved between the lower end face of the lower nozzle steel shell and the lower end face of the lower nozzle brick.

The utility model discloses the beneficial technological effect of content is: the utility model discloses the first section and the second section of lower mouth of a river steel shell all are equipped with the protruding piece that a plurality of cross-sections are the recess form, protruding piece card is gone into the side of lower mouth of a river brick, because the cross-section is the protruding piece of recess form and is the face contact between the lower mouth of a river brick lateral wall, be curved protruding piece for traditional cross-section, increased with the contact surface of lower mouth of a river brick lateral wall, consequently, be difficult to the slippage and take place the displacement, it is easy and lower mouth of a river steel shell slippage and takes place the displacement to have avoided traditional lower mouth of a river steel shell upper cross-section to be curved arch, and the lower mouth of a river brick that leads to oozes steel or the bleed-out phenomenon with lower slide seam position and takes place, the.

Drawings

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

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a sectional view taken along line A-A of FIG. 1;

fig. 4 is a sectional view taken along line B-B of fig. 1.

In the figure, 1 is a lower nozzle brick, 2 is a lower nozzle steel shell, 3 is a fire clay layer, 4 is a steel flowing hole, and 5 is a cross section

The convex block is in a groove shape.

Detailed Description

First embodiment, referring to the attached drawings (1-4) of the specification, a lower nozzle brick comprises a lower nozzle brick (1), a lower nozzle steel shell (2) and a fire mud layer (3), and is characterized in that: the diameter of the upper half section of the lower nozzle brick (1) is larger than that of the lower half section, a vertically through steel flowing hole (4) is arranged in the middle of the lower nozzle brick (1), molten steel passes through the steel flowing hole (4), so that the lower nozzle brick (1) bears very high molten steel temperature, a fire clay layer (3) is uniformly coated on the outer side surface of the lower nozzle brick (1), the fire clay layer (3) plays a role in heat insulation, a lower nozzle steel shell (2) is sleeved on the outer side surface of the lower nozzle brick (1) coated with the fire clay layer (3), the size of the lower nozzle steel shell (2) is matched with that of the outer side surface of the lower nozzle brick (1) coated with the fire clay layer (3), a plurality of convex blocks (5) (5) with groove-shaped cross sections are uniformly arranged on the inner side surface of the upper nozzle of the lower nozzle steel shell (2) along the circumference, a plurality of convex blocks (5) (5) with groove-shaped cross sections are uniformly arranged on the inner side surface of the lower half section along the circumference, the convex blocks (5) and (5) with groove-shaped sections penetrate through the middle fire clay layer (3) and are clamped into the outer side wall of the lower nozzle brick (1) to prevent the displacement of the lower nozzle steel shell (2) and the lower nozzle brick (1).

The number of the convex blocks (5) and (5) with the groove-shaped cross section is more than or equal to three, and the number of the convex blocks can be selected according to the size of the lower nozzle brick (1) so as to achieve the optimal fixing effect.

The two ends of the lower nozzle steel shell (2) and the two ends of the fire clay layer (3) coated on the outer side surface of the lower nozzle brick (1) are flush, so that the lower nozzle steel shell (2) and the lower nozzle brick (1) are sealed, and the phenomenon that the lower nozzle steel shell (2) is unstable and displaces due to the fact that gaps are washed by molten steel is avoided.

The upper end surface of the lower nozzle steel shell (2) has a certain distance to the upper end surface of the lower nozzle brick (1), and the lower end surface of the lower nozzle steel shell (2) has a certain distance to the lower end surface of the lower nozzle brick (1).

In the embodiment, a shell pressing machine is used for manufacturing a main body of the steel casing (2) of the lower nozzle, and three convex blocks (5) (5) with concave groove-shaped sections are uniformly punched on the circumferences of the upper section and the lower end of the main body of the steel casing (2) of the lower nozzle by a punch; the outer surface of the lower nozzle brick (1) is coated with the fire clay with uniform thickness, then the lower nozzle steel shell (2) is firmly fixed by a clamp, the lower nozzle brick (1) coated with the fire clay is sleeved into the lower nozzle steel shell (2) and is pressed by a tool, and the fire clay is naturally placed for a period of time and is dried.

Claims

1. The utility model provides a lower nozzle brick, includes lower nozzle brick body, lower nozzle steel casing, fire clay layer, its characterized in that: the diameter of the first section of lower nozzle brick body be greater than the diameter of the second section, the centre of lower nozzle brick body is equipped with the steel flowing hole that link up from top to bottom, and the lateral surface of lower nozzle brick body evenly scribbles the one deck the fireclay layer, lower nozzle steel casing suit the lateral surface of the lower nozzle brick body that scribbles the fireclay layer, the size of lower nozzle steel casing and the size phase-match of the lateral surface of the lower nozzle brick body that scribbles the fireclay layer, the medial surface of the first section of lower nozzle steel casing evenly be equipped with a plurality of cross-sections and be the protruding piece of flute profile along the circumference, the medial surface of lower half also evenly be equipped with a plurality of cross-sections along the circumference and be the protruding piece of flute profile, the protruding piece that the cross-section is the flute profile pass middle fireclay layer and block the lateral wall of lower nozzle brick body.

2. A lower nozzle brick according to claim 1, characterized in that: the number of the convex blocks with the groove-shaped cross sections is more than or equal to three.

3. A lower nozzle brick according to claim 1, characterized in that: and the two ends of the lower nozzle steel shell are flush with the two ends of the fire clay layer coated on the outer side surface of the lower nozzle brick body.

4. A lower nozzle brick according to claim 2, characterized in that: the upper end surface of the lower nozzle steel shell is spaced from the upper end surface of the lower nozzle brick body, and the lower end surface of the lower nozzle steel shell is spaced from the lower end surface of the lower nozzle brick body.