A bottom blowing air supply brick

Abstract

The present invention discloses a bottom blowing air supply brick, which belongs to the field of smelting technology. The bottom blowing air supply brick comprises a brick body, in which a plurality of annular air holes axially penetrating the brick body are formed, the air inlet end of the annular air hole is connected with an air chamber arranged at one end of the brick body, and the air inlet of the air chamber is connected with an air inlet pipe. The present invention arranges a plurality of annular air holes connected with the air chamber in the brick body, and the bottom blowing gas is sprayed into the molten steel from the annular air holes, which can reduce the gas flow rate and increase the stirring effect on the molten steel, thereby reducing the smelting cost and realizing a steady flow during the stroke. The present invention has an ingenious structure, good use effect, strong practicability and broad application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of smelting, and in particular to a bottom-blowing gas supply brick. Background Art

[0002] In the process of steel smelting, it is necessary to blow air from the bottom of the molten pool to the molten steel to achieve stirring of the molten steel and to cause oxidation-reduction reaction between the molten steel and the medium, thereby accelerating steelmaking. The device for blowing air to the bottom of the molten pool includes a bottom blowing gun and a bottom blowing brick. Among them, the existing bottom blowing brick cannot control the flow rate of the gas, resulting in waste of bottom blowing gas, high smelting cost, and poor effect on stirring the molten steel, low smelting efficiency, and there is room for improvement. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a bottom blowing air supply brick.

[0004] The present invention is achieved according to the following technical solutions:

[0005] A bottom blowing air supply brick comprises a brick body, wherein a plurality of annular air holes are formed in the brick body and axially penetrate the brick body, the air inlet end of the annular air hole is communicated with an air chamber arranged at one end of the brick body, and the air inlet of the air chamber is connected with an air inlet pipe.

[0006] Furthermore, an insulating sheet is provided on the end surface of the brick body close to the air chamber.

[0007] Furthermore, a shoulder is formed in the middle of the outer wall of the brick body.

[0008] Furthermore, a pre-alarm tube and an alarm tube are inserted into the brick body.

[0009] Furthermore, one end of the pre-alarm tube and the alarm tube is placed inside the brick body, and the other end is located outside the brick body.

[0010] The advantages and beneficial effects of the present invention are:

[0011] (1) The present invention provides a plurality of annular air holes in the brick body which are connected to the air chamber. The bottom blowing gas is sprayed into the molten steel from the annular air holes, which reduces the gas flow rate and increases the stirring effect on the molten steel, thereby reducing the smelting cost and achieving a stable flow during the stroke.

[0012] (2) The present invention provides an alarm tube and a pre-alarm tube in the brick body, which can realize effective monitoring of the temperature during the smelting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 is a cross-sectional view of the present invention;

[0015] Figure 3 yes Figure 2 Enlarged view of part A.

[0016] Among them, 1. Brick body; 1-1. Shoulder; 2. Insulating sheet; 3. Air inlet pipe; 4. Air chamber; 5. Annular air hole; 6. Alarm tube; 7. Pre-alarm tube. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figures 1 to 3 As shown, a bottom blowing gas supply brick is inserted into the bottom of the molten pool to stir the molten steel by blowing air into the molten pool. It specifically includes a brick body 1, an insulating sheet 2, an air inlet pipe 3, an air chamber 4, an annular air hole 5, an alarm pipe 6, and a pre-alarm pipe 7.

[0019] The brick body 1 is made of high temperature and corrosion resistant materials such as magnesium carbon and corundum. The brick body 1 includes two cylinders with different outer diameters, so that the brick body 1 forms a large diameter end and a small diameter end, and a shoulder 1-1 is formed at the intersection of the two cylinders with different outer diameters to adapt to the molten pool.

[0020] An air chamber 4 is provided on one side of the large diameter end of the brick body 1, and a plurality of annular pores 5 are formed between the bottom wall of the air chamber 4 and the small diameter end of the brick body 1. One end of the annular pore 5 is connected to the air chamber 4, and the other end passes through the end face of the small diameter end of the brick body 1; the air inlet of the air chamber 4 is connected to the air inlet pipe 3, and the gas (argon or other inert gas can be selected) enters the air chamber 4 through the air inlet pipe 3, and the gas in the air chamber 4 can be sprayed out of the brick body 1 through the annular pores 5 and sprayed into the molten steel. The arrangement of the plurality of annular pores 5 in the brick body 1 can be in any manner such as a matrix or annular, and is not specifically limited. In addition, the annular pores 5 described in the present application refer to pores in the shape of a circular ring. The present application sets the pores in the shape of a circular ring. Compared with circular pores, on the one hand, it can reduce the flow rate of gas and reduce smelting costs. On the other hand, the sprayed annular gas can improve the stirring effect, so that the molten steel and the medium are fully in contact to produce an oxidation-reduction reaction, thereby accelerating steelmaking.

[0021] The present application also inserts a pre-alarm tube 7 and an alarm tube 6 in the brick body 1, one end of which is placed in the brick body 1, and the other end passes through the large diameter end of the brick body 1. The pre-alarm tube 7 is inserted into the brick body 1 to a greater depth than the alarm tube 6, that is, the pre-alarm tube 7 contacts the molten steel faster, detects the temperature of the molten steel, and when it reaches a certain temperature, the pre-alarm tube 7 gives an alarm. If the temperature of the molten steel further rises and reaches the alarm temperature of the alarm tube 6, the alarm tube 6 gives an alarm.

[0022] An insulating sheet 2 is also provided on the end surface of the large diameter end of the brick body 1. Since the molten steel is charged during the smelting process, the insulating sheet 2 can be provided to isolate the electricity and ensure the personal safety of the staff.

[0023] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention are within the protection scope and disclosure scope of the present invention.

Claims

1. A bottom-blowing gas supply brick, comprising a brick body (1), characterized in that: A plurality of annular pores (5) are formed in the brick body (1) and axially penetrate the brick body (1); the air inlet ends of the annular pores (5) are connected to an air chamber (4) provided at one end of the brick body (1); and the air inlet of the air chamber (4) is connected to an air inlet pipe (3).

2. The bottom blowing gas supply brick according to claim 1, characterized in that: An insulating sheet (2) is provided on the end surface of the brick body (1) close to the air chamber (4).

3. The bottom blowing gas supply brick according to claim 1, characterized in that: A shoulder (1-1) is formed in the middle of the outer wall of the brick body (1).

4. The bottom blowing air supply brick according to claim 1, characterized in that: A pre-alarm tube (7) and an alarm tube (6) are also inserted into the brick body (1).

5. The bottom blowing gas supply brick according to claim 4, characterized in that: One end of the pre-alarm tube (7) and the alarm tube (6) is placed inside the brick body (1), and the other end is located outside the brick body (1).

Images