LF refining furnace for improving foaming performance of foaming slag

Abstract

The utility model discloses an LF (Ladle Furnace) refining furnace for improving the foaming performance of foamed slag, which comprises an LF refining furnace main body, an argon bottom blowing system arranged at the bottom of the LF refining furnace main body, a group of annularly distributed adding ports arranged on the side surface of the upper part of the LF refining furnace main body, a conveying pipe connected to the outer sides of the adding ports, and an argon conveying distributor connected to the conveying pipe, the argon conveying distributor is respectively connected with an alkalinity regulator storage bin and a deoxidizing agent storage bin through pipelines; the argon conveying distributor comprises a mixed injection chamber, one end of the mixed injection chamber is connected with a plurality of conical connecting branch pipes in parallel, the conical connecting branch pipes are connected with a conveying pipe, the other end of the mixed injection chamber is provided with an argon injection pipe extending into the mixed injection chamber, and the outer end of the argon injection pipe is connected with an air pump and an argon storage tank through pipelines. And two blanking ports positioned at the left end of the gas outlet of the argon gas injection pipe are also arranged above the mixed injection chamber. The device has the characteristics that the alkalinity adjusting uniformity can be effectively improved, so that the foaming performance of the steel slag is improved.

Description

Technical Field

[0001] The utility model relates to an LF refining furnace, in particular to an LF refining furnace capable of improving the foaming performance of foam slag. Background Art

[0002] The LF refining furnace is a smelting equipment in the hot processing industry, and is mostly used for the final deoxidation and alloying process of molten steel in ferrous metallurgy. The LF refining furnace mainly consists of a furnace body, a furnace cover, an arc heating device, a feeding device, a bottom blowing system and other components. During the production process of the LF refining furnace, the foaming performance of the steel slag is related to the alkalinity of the steel slag. The alkalinity of the steel slag needs to be adjusted to an appropriate range. Generally, the furnace liquid is treated by adding components such as alkalinity regulators. However, the addition of alkalinity regulators is currently mainly done by manual feeding or simply feeding through pipes. The alkalinity regulator is easily concentrated in a certain area and is unevenly dispersed, which leads to uneven alkalinity adjustment and affects the final foaming performance of the steel slag. Therefore, the existing technology has the problem of uneven alkalinity adjustment, which in turn affects the foaming performance of the steel slag. Utility Model Content

[0003] The purpose of the utility model is to provide an LF refining furnace that improves the foaming performance of foamed slag. The utility model has the characteristics of being able to effectively improve the uniformity of basicity adjustment and thus improve the foaming performance of steel slag.

[0004] The technical solution of the present invention is as follows: an LF refining furnace for improving the foaming performance of foam slag, comprising an LF refining furnace main body, an argon bottom blowing system being provided at the bottom of the LF refining furnace main body, a group of annularly distributed adding ports being provided on the side of the upper part of the LF refining furnace main body, a delivery pipe being connected to the outer side of the adding port, an argon delivery distributor being connected to an alkalinity regulator storage bin and a deoxidizer storage bin via pipelines; the argon delivery distributor comprising a mixing injection chamber, a plurality of conical connecting branches being connected in parallel at one end of the mixing injection chamber, the conical connecting branches being connected to the delivery pipe, an argon injection pipe being provided at the other end of the mixing injection chamber extending into the interior of the mixing injection chamber, an outer end of the argon injection pipe being connected to an air pump and an argon storage tank via a pipeline, and two blanking ports being provided above the mixing injection chamber, which are located at the left end of the air outlet of the argon injection pipe.

[0005] In the aforementioned LF refining furnace for improving the foaming performance of foamed slag, an inclined surface is provided above the mixing and injection chamber.

[0006] In the aforementioned LF refining furnace for improving the foaming performance of foamed slag, a valve is provided in the blanking port.

[0007] In the aforementioned LF refining furnace for improving the foaming performance of foamed slag, the inner end of the addition port is provided with a flaring structure; and the addition port is arranged inclined from the outside to the inside.

[0008] Compared with the prior art, the present invention sets a group of annular addition ports on the side wall surface of the upper part of the LF refining furnace body, connects an argon delivery distributor to the outside of the addition port, and the argon delivery distributor is respectively connected to the alkalinity regulator storage bin and the deoxidizer storage bin, and uses argon to evenly deliver the alkalinity regulator or deoxidizer to various areas inside the LF refining furnace body, thereby improving the distribution uniformity of the alkalinity regulator or deoxidizer, improving the alkalinity adjustment uniformity, and thus improving the steel slag foaming performance. Moreover, the alkalinity regulator storage bin and the deoxidizer storage bin share an argon delivery distributor, which can reduce equipment investment and increase space occupancy. In summary, the present invention has the characteristics of being able to effectively improve the alkalinity adjustment uniformity and thus improve the steel slag foaming performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the utility model;

[0010] Figure 2 This is the structural view of the added port.

[0011] The marks in the accompanying drawings are: 1-LF refining furnace body, 2-argon bottom blowing system, 3-addition port, 4-delivery pipe, 5-argon delivery distributor, 6-alkalinity regulator storage bin, 7-deoxidizer storage bin, 8-expansion structure, 501-mixing injection chamber, 502-conical connecting branch pipe, 503-argon injection pipe, 504-air pump, 505-argon storage tank, 506-dropping port, 507-inclined surface, 508-valve. DETAILED DESCRIPTION

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0013] Embodiment. A LF refining furnace for improving the foaming performance of foam slag, comprising: Figure 1 As shown, it includes an LF refining furnace body 1, an argon bottom blowing system 2 is provided at the bottom of the LF refining furnace body 1, a group of annularly distributed adding ports 3 are provided on the side of the upper part of the LF refining furnace body 1, the outer side of the adding port 3 is connected to a delivery pipe 4, the delivery pipe 4 is connected to an argon delivery distributor 5, and the argon delivery distributor 5 is connected to an alkalinity regulator storage bin 6 and a deoxidizer storage bin 7 through pipelines; the argon delivery distributor 5 includes a mixing injection chamber 501, and a plurality of tapered connecting branches 502 are connected in parallel at one end of the mixing injection chamber 501, and the tapered connecting branch 502 is connected to the delivery pipe 4. An argon injection pipe 503 extending into the interior of the mixing injection chamber 501 is provided at the other end of the mixing injection chamber 501, and the outer end of the argon injection pipe 503 is connected to an air pump 504 and an argon storage tank 505 through a pipeline. Two blanking ports 506 located at the left end of the gas outlet of the argon injection pipe 503 are also provided above the mixing injection chamber 501.

[0014] An inclined surface 507 is provided above the mixing and spraying chamber 501 .

[0015] A valve 508 is provided in the blanking port 506 .

[0016] Composition Figure 2 As shown, the inner end of the addition port 3 is provided with a flaring structure 8; the addition port 3 is arranged inclined from the outside to the inside.

[0017] An inclined surface is provided above the mixing injection chamber to form a conical mixing injection chamber, and the argon injection pipe extends into the mixing injection chamber and is located on the right side of the blanking port, so that a negative pressure is formed at the blanking port, which can quickly transport the additive and prevent blockage at the blanking port.

[0018] The spray distance of the material discharged from the addition port can be adjusted by adjusting the argon supply speed, thereby improving the distribution uniformity of the deoxidizer and alkalinity regulator.

[0019] The inner end of the addition port is provided with a flaring structure, thereby expanding the dispersion surface and facilitating the improvement of the distribution area and uniformity of the deoxidizer and alkalinity regulator.

[0020] The alkalinity regulator can be high melting point quartz sand.

[0021] The working process of the utility model is as follows: at the initial stage, the air pump works, blowing argon from the argon storage tank into the mixing ejector, creating negative pressure at the two blanking ports on the left end of the mixing ejector. When it is necessary to add alkalinity regulator or deoxidizer, the valve of the corresponding blanking port is simply opened. Under the action of negative pressure suction, the alkalinity regulator or deoxidizer is sucked into the mixing ejector chamber, blown into the corresponding tapered connecting branch pipe, and then into the delivery pipe. Finally, it is blown out from the addition port and dispersed into the furnace liquid in the LF refining furnace body. When no addition is required, argon is blown into the addition port.

[0022] The argon bottom blowing system blows argon from the air-permeable bricks at the bottom to stir the liquid inside the furnace.

Claims

1. An LF refining furnace for improving the foaming performance of foamed slag, characterized by: The invention comprises an LF refining furnace body (1), an argon bottom blowing system (2) is provided at the bottom of the LF refining furnace body (1), a group of annularly distributed adding ports (3) are provided on the side of the upper part of the LF refining furnace body (1), the outer side of the adding ports (3) is connected to a delivery pipe (4), the delivery pipe (4) is connected to an argon delivery distributor (5), and the argon delivery distributor (5) is respectively connected to an alkalinity regulator storage bin (6) and a deoxidizer storage bin (7) through pipelines; the argon delivery distributor (5) comprises a mixing injection chamber (501), One end of the mixing and spraying chamber (501) is connected in parallel with a plurality of tapered connecting branches (502), which are connected to the delivery pipe (4). The other end of the mixing and spraying chamber (501) is provided with an argon injection pipe (503) extending into the interior of the mixing and spraying chamber (501). The outer end of the argon injection pipe (503) is connected to an air pump (504) and an argon storage tank (505) via a pipeline. Two blanking ports (506) are also provided above the mixing and spraying chamber (501) and are located at the left end of the gas outlet of the argon injection pipe (503).

2. The LF refining furnace for improving the foaming performance of foamed slag according to claim 1, characterized in that: An inclined surface (507) is provided above the mixing and spraying chamber (501).

3. The LF refining furnace for improving the foaming performance of foamed slag according to claim 1, characterized in that: A valve (508) is provided in the drop opening (506).

4. The LF refining furnace for improving the foaming performance of foamed slag according to claim 1, characterized in that: The inner end of the addition port (3) is provided with a flaring structure (8); the addition port (3) is arranged obliquely from the outside to the inside.

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