CN220907532U - Converter bottom blowing air brick with dip angle rotational flow bundling pipe - Google Patents

Abstract

The utility model discloses a bottom-blowing air-permeable brick for a converter with an inclined swirl cluster tube, which relates to the field of metallurgical refractory technology, including refractory bricks, wherein an air inlet pipe and a cluster tube body are respectively arranged inside the refractory bricks, and the ends of the air inlet pipe and the cluster tube body which are far away from each other are respectively connected with the refractory bricks through and through, and three layers of annular cluster tubes are arranged inside the refractory bricks, and an inclination is arranged between the outer layer and the inner layer of the cluster tubes and the refractory bricks. When the converter is bottom-blown, the stirring of the molten pool can be enhanced, and the blowing jets at different angles can improve the flow and mass transfer of the molten pool. Since the inner and outer layers of the cluster tubes have an inclination, the air outlet exposed outside the refractory bricks is elliptical, which better improves the stirring and dynamic conditions of the molten pool. The application has a simple structure and strong operability, and can achieve a better blowing effect without major changes to the original equipment. By utilizing the characteristics of fluid dynamics and changing the arrangement of the cluster tubes, the blowing effect can be optimized to meet the process requirements for smelting high-specification steel grades.

Description

A converter bottom blowing air-permeable brick with an inclined swirl cluster tube

Technical Field

The utility model relates to the technical field of metallurgical refractory, in particular to a converter bottom-blown air-permeable brick with an inclined swirl cluster tube.

Background technique

The converter combined blowing process is an important part of converter steelmaking, which has a far-reaching impact on the production cost, product quality and production organization of the steel plant. The layout of the converter bottom blowing elements and the number of bottom blowing elements will affect the metallurgical effect on the stirring of the molten pool. Whether it is a newly built, rebuilt or operating converter, the selection, quantity and layout of the bottom blowing permeable elements are difficult problems that bother designers and front-line production technicians. Therefore, improving the converter combined blowing effect is an important topic in converter steelmaking.

At present, there are two main structural forms of bottom blowing air supply components commonly used. One is a nozzle-type bottom blowing air supply component mainly based on annular seam type (double annular seam, triple annular seam). The main disadvantage is that the gas volume adjustment range is relatively small, and the gas volume cannot be adjusted in a larger range according to the steel type and smelting process requirements; the other is a brick-type air supply component with directional multi-microtube type. The biggest advantage of this form is that the gas volume adjustment range is large and the safety is good. The pipe diameter and number of pipes inside the directional multi-porous air supply component can be selected according to the maximum and minimum stirring intensity required by the process. The disadvantage is that the diameter of the pipe outlet is consistent, the blowing direction is consistent, and the stirring effect on the bottom blowing of the converter is not obvious.

The Chinese utility model patent with patent application number CN200620041505.3 discloses "inclined hole-type air-permeable bricks for bottom blowing of converter", which include refractory bricks and metal tubes. The metal tubes are arranged in the refractory brick body and inclined in the same direction. This utility model has only one circle of metal tubes for blowing gas, and the stirring effect on the molten pool is not obvious.

The Chinese utility model patent with patent application number CN201120544834.0 discloses "a new type of bottom blowing air supply element for converter". This utility model evenly distributes cluster tubes in the refractory material, and sets 1 to 3 cluster tubes around the main air inlet path. However, in this laying method, the air inlet and the air outlet are in the same direction, perpendicular to the bottom of the refractory bricks, and the air outlet blows in the same direction during the stirring process. The three layers of blown gas do not interfere with each other, and the stirring effect is poor.

Therefore, in order to strengthen the stirring of the converter molten pool, improve flow and mass transfer, and improve reaction efficiency, it is necessary to invent a new type of converter bottom breathable brick that can effectively improve the stirring and dynamic conditions of the molten pool and meet the process requirements of smelting high-specification steel grades.

Utility Model Content

The main purpose of the utility model is to provide a converter bottom blowing air-permeable brick with an inclined swirl cluster tube, which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical solution adopted by the utility model is:

A converter bottom-blown air-permeable brick with an inclined swirl cluster tube comprises refractory bricks, wherein an air inlet pipe and a cluster tube body are respectively installed inside the refractory bricks, wherein the ends of the air inlet pipe and the cluster tube body which are away from each other are respectively connected to the refractory bricks through the refractory bricks, wherein the cluster tube body is composed of a plurality of inner cluster tubes, a plurality of middle cluster tubes and a plurality of outer cluster tubes, wherein the plurality of inner cluster tubes, middle cluster tubes and outer cluster tubes are respectively arranged in a circular shape.

Preferably, the horizontal angle between the plurality of outer layer cluster tubes and the refractory bricks is 75°.

Preferably, the plurality of middle-layer cluster tubes are respectively perpendicular to the refractory bricks.

Preferably, a plurality of the inner layer cluster tubes cross with the outer layer cluster tubes at an angle of 20-30 degrees.

Preferably, the number of the inner layer cluster tubes is 4-6, the number of the middle layer cluster tubes is 7-10, and the number of the outer layer cluster tubes is 13-15.

Preferably, the diameter of the inner layer cluster tubes is 20-30 mm, the diameter of the middle layer cluster tubes is 50-60 mm, and the diameter of the outer layer cluster tubes is 80-100 mm.

Compared with the prior art, the utility model has the following beneficial effects:

There are three layers of annular cluster tubes inside the refractory bricks. There is an inclination between the outer and inner cluster tubes and the refractory bricks. When blowing at the bottom of the converter, the stirring of the molten pool can be enhanced. The blowing jets at different angles can improve the flow and mass transfer of the molten pool. Since the inner and outer cluster tubes have an inclination, the air outlet exposed outside the refractory bricks is elliptical, which better improves the stirring and dynamic conditions of the molten pool. The application has a simple structure and strong operability. It does not require major changes to the original equipment to achieve better blowing effects. By utilizing the characteristics of fluid dynamics and changing the arrangement of the cluster tubes, the blowing effect can be optimized to meet the process requirements of smelting high-specification steel grades.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a converter bottom-blown air-permeable brick with an inclined swirl cluster tube according to the present invention;

FIG2 is a schematic diagram of the structure of a bundled pipe body of a converter bottom-blown air-permeable brick with an inclined swirl bundled pipe according to the utility model;

FIG3 is an enlarged structural schematic diagram of point A of a converter bottom-blown air-permeable brick with an inclined swirl cluster tube according to the utility model.

In the figure: 1. refractory bricks; 2. air inlet pipe; 3. cluster pipe body; 31. inner cluster pipe; 32. middle cluster pipe; 33. outer cluster pipe.

Detailed ways

In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

As shown in Fig. 1-3, a bottom-blown air-permeable brick for a converter with an inclined swirl cluster tube comprises a refractory brick 1, wherein an air inlet pipe 2 and a cluster tube body 3 are respectively installed inside the refractory brick 1, wherein the ends of the air inlet pipe 2 and the cluster tube body 3 which are away from each other are respectively connected to the refractory brick 1 through the cluster tube body 3, wherein the cluster tube body 3 is composed of a plurality of inner cluster tubes 31, a plurality of middle cluster tubes 32 and a plurality of outer cluster tubes 33, wherein the plurality of inner cluster tubes 31, the middle cluster tubes 32 and the outer cluster tubes 33 are respectively arranged in a circular shape.

Specifically, the horizontal angle between the plurality of outer layer cluster tubes 33 and the refractory bricks 1 is 75°.

Specifically, a plurality of middle-layer cluster tubes 32 are respectively perpendicular to the refractory bricks 1 .

Specifically, a plurality of inner layer cluster tubes 31 cross with the outer layer cluster tubes 33 at an angle of 20-30 degrees.

Specifically, the number of the inner layer cluster tubes 31 is 4-6, the number of the middle layer cluster tubes 32 is 7-10, and the number of the outer layer cluster tubes 33 is 13-15.

Specifically, the diameter of the inner layer cluster tubes 31 is 20-30 mm, the diameter of the middle layer cluster tubes 32 is 50-60 mm, and the diameter of the outer layer cluster tubes 33 is 80-100 mm.

Working principle: During the bottom blowing operation of the converter, the air inlet pipe 2 at the bottom of the refractory brick 1 is connected to the air supply pipe, and the gas is blown to the inside of the converter through the internal cluster pipe body 3 of the refractory brick 1, which stirs the airflow and the molten steel. In the utility model, since the cluster pipe body 3 is arranged at an inclined angle to the bottom of the refractory brick 1, interference is formed between the airflows during the gas supply and stirring process. The blowing jets at different angles can improve the flow and mass transfer of the molten pool. Since the inner and outer layers of the cluster pipes have an inclination, the air outlet exposed outside the refractory brick 1 is elliptical, which better improves the stirring and dynamic conditions of the molten pool and has a good stirring effect on the molten steel. At the same time, pit melting loss is prone to occur during the flow of molten steel. In the utility model, under the action of the inclination airflow, the interaction of the airflows can reduce the scouring of the molten steel and reduce the erosion around the refractory brick 1.

The circuits, electronic components and control modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the utility model does not involve improvements to software and methods.

The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims (6)

1. A bottom-blown air-permeable brick for a converter with an inclined swirl cluster tube, comprising a refractory brick (1), characterized in that an air inlet pipe (2) and a cluster tube body (3) are respectively installed inside the refractory brick (1), and the ends of the air inlet pipe (2) and the cluster tube body (3) that are away from each other are respectively connected to the refractory brick (1), and the cluster tube body (3) is composed of a plurality of inner cluster tubes (31), a plurality of middle cluster tubes (32) and a plurality of outer cluster tubes (33), wherein the plurality of inner cluster tubes (31), the middle cluster tubes (32) and the outer cluster tubes (33) are respectively arranged in a circular shape. 2. A converter bottom blowing air-permeable brick with an inclined swirl cluster tube according to claim 1, characterized in that the horizontal angle between the plurality of said outer layer cluster tubes (33) and the refractory bricks (1) is 75°. 3. The converter bottom blowing air-permeable brick with an inclined swirl cluster tube according to claim 1, characterized in that: a plurality of the middle layer cluster tubes (32) are respectively perpendicular to the refractory bricks (1). 4. The converter bottom blowing air-permeable brick with inclined swirl cluster tubes according to claim 1 is characterized in that a plurality of the inner cluster tubes (31) are respectively crossed with the outer cluster tubes (33) at an angle of 20-30°. 5. The converter bottom blowing air-permeable brick with angled swirl cluster tubes according to claim 1 is characterized in that the number of the inner layer cluster tubes (31) is 4-6, the number of the middle layer cluster tubes (32) is 7-10, and the number of the outer layer cluster tubes (33) is 13-15. 6. The converter bottom blowing air-permeable brick with an inclined swirl cluster tube according to claim 1 is characterized in that the diameter of the inner layer cluster tube (31) is 20-30 mm, the diameter of the middle layer cluster tube (32) is 50-60 mm, and the diameter of the outer layer cluster tube (33) is 80-100 mm.