CN-224209113-U - Pouring nozzle brick for casting special steel

CN224209113UCN 224209113 UCN224209113 UCN 224209113UCN-224209113-U

Abstract

The utility model relates to a pouring nozzle brick for casting special steel, which comprises a first nozzle brick body and a second nozzle brick body, wherein the first nozzle brick body is coaxially connected with an upper port of the second nozzle brick body, a plurality of air holes are radially arranged in the side wall of the second nozzle brick body along the axial direction, the air holes form a discharge hole group, the inner ends of the air holes penetrate into a steel flowing hole, the outer side surface of the second nozzle brick body is connected with an air inlet joint, the inner end of the air inlet joint is communicated with the outer end of the air holes, a plurality of radiation hole groups are uniformly distributed in the second nozzle brick body, an annular cavity is arranged in the second nozzle brick body, the outer ends of the air holes distributed on the inner circumference of the second nozzle brick body are all communicated with the annular cavity, and an air inlet joint pipe is communicated with each air hole through the annular cavity. The sewer brick can avoid secondary oxidization of molten steel, meet special steel types with low casting oxygen content requirements, and effectively ensure casting quality of steel.

Inventors

ZHANG ZHIFENG
LIANG BAOQING
ZHAO ZHIHAO
XU YUEQING
LI HONGYU
SHANG JUNLI
ZHAO CHENRUI
LI AIMEI
WANG HAIXIA

Assignees

河南熔金高温材料股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250416

Claims (6)

1. The lower nozzle brick for casting special steel is characterized by comprising a first nozzle brick body and a second nozzle brick body, wherein the first nozzle brick body is coaxially connected with the upper port of the second nozzle brick body, a plurality of air holes are radially formed in the side wall of the second nozzle brick body along the axial direction, the air holes form a discharge hole group, the inner ends of the air holes penetrate into steel flowing holes, the outer side face of the second nozzle brick body is connected with an air inlet joint, and the inner ends of the air inlet joint are communicated with the outer ends of the air holes.
2. The special steel casting sewer nozzle of claim 1, wherein the second sewer nozzle is internally and uniformly provided with a plurality of radial hole groups, an annular chamber is arranged in the second sewer nozzle, the outer ends of the air holes distributed on the inner circumference of the second sewer nozzle are communicated with the annular chamber, and the air inlet joint pipe is communicated with each air hole through the annular chamber.
3. The special steel pouring nozzle brick as claimed in claim 1, wherein the first nozzle brick body is a mechanically pressed brick body, and the second nozzle brick body is a cast brick body.
4. The special steel casting nozzle brick of claim 3, wherein the middle part of the bottom surface of the second nozzle brick body is provided with an annular bulge with isosceles trapezoid cross section, and the middle part of the upper surface of the first nozzle brick body is provided with an annular groove which corresponds to the annular bulge in position and is matched in size.
5. The special steel pouring nozzle brick as claimed in claim 1, wherein steel shells are matched with the outer side surfaces of the first nozzle brick body and the second nozzle brick body, and the steel shells are fixedly connected with the brick bodies through fireclay.
6. The pouring nozzle brick for casting special steel according to claim 5, wherein the middle part of the steel shell is provided with an annular convex rib protruding towards the inner side surface of the steel shell, and the annular convex rib is embedded into the fireclay.

Description

Pouring nozzle brick for casting special steel Technical Field The utility model relates to the field of steelmaking refractory materials, in particular to a pouring nozzle brick for casting special steel. Background The water outlet brick is a key refractory material component at the bottom of the steel ladle and is used for controlling the flow rate and the flow velocity of molten steel. The core function is to stably guide the flow of molten steel in a high-temperature environment and ensure the safety and efficiency of the casting process. The runner brick is widely used for a sliding runner system of a ladle and a tundish, and the flow of molten steel is regulated by sliding an upper sliding plate and a lower sliding plate. The lower nozzle brick is used as a channel for flowing steel and is connected with the ladle long nozzle in a matched manner to protect the steel to be poured so as to prevent secondary oxidation of the molten steel. The traditional water outlet is formed by mechanical pressing, the water outlet brick blank is dried and then the water outlet brick and the water outlet steel shell are assembled together, and the other water outlet brick blank is formed by pouring strip steel shell. The two molding methods of the water outlet can not effectively prevent secondary oxidation of molten steel in the steel casting process and can not meet the special steel grade with lower requirement of casting oxygen content. Disclosure of utility model In order to solve the problems, the utility model provides a pouring nozzle brick for casting special steel. The utility model has the technical scheme that the special steel casting sewer nozzle brick comprises a first nozzle brick body and a second nozzle brick body, wherein the first nozzle brick body is coaxially connected to the upper port of the second nozzle brick body, the inside of the first nozzle brick body and the inside of the second nozzle brick body are respectively provided with a steel flow hole, a plurality of air holes are radially arranged in the side wall of the second nozzle brick body along the axial direction, the air holes are round holes, the air holes form a radiation hole group, the inner ends of the air holes are communicated into the steel flow holes, the outer side face of the second nozzle brick body is connected with an air inlet joint, inert air holes are led into the air holes through the air inlet joint, and the inner ends of the air inlet joint are communicated with the outer ends of the air holes. Preferably, the second nozzle brick body in the equipartition have a plurality of radial hole group to be equipped with annular chamber in the second nozzle brick body is internal, annular chamber's cross section is square, the bleeder vent outer end that the internal circumference of second nozzle brick distributes all communicates with annular chamber, the air inlet joint pipe passes through annular chamber and communicates with each bleeder vent. Preferably, the first water gap brick body is a machine-pressed brick body, the second water gap brick body is a casting brick body, and the machine-pressed brick body needs to be dried and then is cast. Preferably, the middle part of the bottom surface of the second water gap brick body is provided with an annular bulge with an isosceles trapezoid cross section, the middle part of the upper surface of the first water gap brick body is provided with an annular groove which corresponds to the annular bulge in position and is matched in size, and the annular bulge is sleeved in the annular groove in a matched manner. Preferably, the outer side surfaces of the first water gap brick body and the second water gap brick body are matched and provided with steel shells, the upper ends of the steel shells and the upper end surface of the second water gap brick body are provided with a certain distance, the lower ends of the steel shells and the bottom surface of the first water gap brick body are provided with a certain distance, and the steel shells and the brick bodies are fixedly connected through fireclay. Preferably, the middle part of the steel shell is provided with an annular convex rib protruding towards the inner side surface of the steel shell, the annular convex rib is embedded into the fire clay, the cross section of the annular convex rib is arc-shaped groove-shaped, and the annular convex rib is formed in a rolling mode. The utility model has the beneficial technical effects that the upper part of the water outlet brick is radially and uniformly provided with a circle of ventilation holes, the ventilation holes are communicated with the air inlet joint through the annular cavity, inert gas can be uniformly distributed to each ventilation hole after entering the annular cavity, the inert gas from the ventilation holes can cover molten steel from the whole circumference when the molten steel passes through the steel flowing holes, the phenomenon that the molten steel is easy