CN218666122U - Novel slag-iron separation structure for blast furnace - Google Patents

Abstract

The utility model relates to a blast furnace is with novel sediment iron isolating construction, include: the tail end of the main ditch is provided with a skimmer, and the skimmer separates molten iron and molten slag; in addition, the main channel is provided with a slag outlet; the molten iron branch channel is communicated with the main channel and is used for collecting molten iron; a baffle is arranged between the main ditch and the molten iron branch ditch; a reinforcing part arranged at one side of the main ditch and the molten iron branch ditch; and the reinforcing part is preset with a dismantling part which is close to the molten iron branch channel. The utility model discloses cancelled artifical fever oxygen, when reducing intensity of labour and save time greatly, avoided burning the pollution of oxygen and bringing yellow cigarette to the environment.

Description

New slag-iron separation structure for blast furnace

technical field

The utility model relates to the technical field of metallurgical auxiliary equipment, in particular to a novel slag-iron separation structure for a blast furnace.

Background technique

At present, in ironmaking production, the main ditch of the blast furnace is an iron storage type main ditch, and a skimmer is installed at the end of the main ditch. Because the density of slag and iron flowing out of the blast furnace is different, the slag and iron separation is realized by using the slag skimmer.

Traditional skimmers, such as the structure disclosed in Chinese utility model patent (CN201376973Y), traditional skimmers mainly include refractory lining, gate, molten iron channel, residual iron eyes, skimmer body and steel shell, and are designed Skimmers with iron eyelets run the risk of burning through the iron eyelets.

After the newly poured slag skimmer has been used continuously for several months, the bottom of the gate will be corroded due to the erosion of high-temperature molten iron. If it is not repaired in time, the slag will pass through the bottom of the gate and enter the branch ditch of the molten iron, resulting in impure molten iron with slag. Affecting steelmaking and smelting will also lead to slag accumulation in the iron ditch, affecting the flow rate of molten iron, resulting in bonding of the molten iron branch ditch, increasing the workload of cleaning in front of the furnace, and because the cleaning needs to enter the molten iron branch ditch after plugging, it will cause to a very large security risk.

In addition, since there are 30-35 tons of molten iron in the main ditch and the skimmer, when the skimmer is repaired, the molten iron stored inside must be drained before repairing.

Due to the narrow operating space of the blast furnace with a model size of 480m ³ , it is not possible to drill residual iron holes with a tap machine, and can only use oxygen to burn the residual iron holes. Burning oxygen, cleaning the residual iron trenches, and blocking the residual iron holes all involve high temperature risks Operation, and the working environment is harsh, often cause accidents such as residual iron eyes leaking iron due to poor sealing, and molten iron falling to the ground and burning vehicles and tracks.

Utility model content

Aiming at the deficiencies of the prior art, the utility model discloses a novel slag-iron separation structure for a blast furnace.

The technical scheme adopted in the utility model is as follows:

A new slag-iron separation structure for blast furnaces, including:

The main ditch is provided with a skimmer at its end, and the skimmer separates molten iron and slag; and, the main ditch is provided with a slag outlet;

A molten iron branch channel communicates with the main channel, and the molten iron branch channel is used to collect the molten iron; and a baffle is set between the main channel and the molten iron branch channel;

A reinforcement part is arranged on one side of the main ditch and the molten iron branch ditch; and a removal part is preset in the reinforcement part, and the removal part is close to the molten iron branch ditch.

Its further technical feature is that: the length of the removal part is 500mm±20mm.

Its further technical feature is that: the height of the removal part is 260mm±20mm.

Its further technical feature is that: the width of the removal part is the same as that of the reinforcement part.

Its further technical feature is that: the skimmer is provided with a slag-iron channel, and the slag-iron channel includes two vertical channels connected through a transverse channel.

Its further technical feature is that: the cross-sectional shape of the transverse channel and the cross-sectional shape of the vertical channel are both polygonal.

Its further technical feature is that: the reinforcing part includes a pouring layer and a base layer, the pouring layer is cast and formed on the base layer, and the base layer is made of bricks.

Its further technical feature is that: the reinforcement part includes a steel plate shell, and the steel plate shell is arranged on the outside of the pouring layer and the foundation layer.

Its further technical feature is that: the height of the steel plate shell is the same as the sum of the height of the pouring layer and the height of the foundation layer.

Its further technical feature is that: the molten iron tributary ditch is provided with an iron tap.

Compared with the prior art, the above-mentioned technical solution of the utility model has the following advantages:

1. The new slag-iron separation structure for blast furnaces described in this utility model realizes a safe and efficient solution for cleaning the residual iron ditch, cancels the residual iron hole of the traditional scum skimmer, and eliminates the risk of burning through the residual iron hole.

2. The utility model completely cancels artificial oxygen burning, greatly reduces labor intensity and saves time, and avoids the environmental pollution caused by yellow smoke caused by oxygen burning.

Description of drawings

In order to make the content of the utility model easier to understand clearly, the utility model will be further described in detail below according to specific embodiments of the utility model and in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of a novel slag-iron separation structure for medium blast furnaces of the present invention.

Fig. 2 is an enlarged schematic view of the removed part in Fig. 1 .

Description of reference signs in the manual: 1. baffle plate; 2. Iron tap hole; 3. Slag discharge port; 4. Hot metal channel; Molten iron; 10, slag; 11, main ditch; 12, branch ditch of molten iron.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the utility model and implement it, but the examples given are not intended to limit the utility model.

The aforementioned and other technical contents, features and effects of the present utility model will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only referring to the directions of the drawings. Therefore, the used directional terms are used to illustrate but not to limit the present invention. In addition, the same reference numerals represent the same elements in all embodiments.

As shown in Figure 1, a new type of slag-iron separation structure for blast furnaces, including:

The main ditch 11 is provided with a skimmer at its end, and the skimmer separates the molten iron 9 and the slag 10; and the main ditch 11 is provided with a slag outlet 3;

The molten iron branch ditch 12 communicates with the main ditch 11, the molten iron branch ditch 12 is used to collect the molten iron 9; and a baffle 1 is set between the main ditch 11 and the molten iron branch ditch 12;

The reinforcement part is arranged on one side of the main ditch 11 and the molten iron branch ditch 12;

The above provides a new type of slag-iron separation structure for blast furnaces, which solves the problem that the existing blast furnace has a narrow operating space for placing residual iron, and it is impossible to use an open machine to drill residual iron holes. Only oxygen can be used to burn residual iron holes, burn oxygen, and clean up. Residual iron trenches and blocking residual iron eyes all involve high temperature and dangerous operations, and the operating environment is harsh. Often, due to poor sealing, iron leakage from residual iron eyes, molten iron falling to the ground and burning vehicles, tracks and other accidents may occur.

In this embodiment, the molten iron channel 4 is formed at the connection between the branch ditch 12 and the main ditch 11 , and the molten iron channel 4 drains the molten iron 9 .

As shown in FIG. 2 , in this embodiment, the length of the removal part 5 is 500 mm ± 20 mm, the height of the removal part 5 is 260 mm ± 20 mm, and the width of the removal part 5 is the same as that of the reinforcing part. Preferably, according to the skimmer used in the existing blast furnace, the length of the removal part 5 is 500 mm, and the height of the removal part 5 is 260 mm.

In this embodiment, the skimmer is provided with a slag-iron channel, and the slag-iron channel includes two vertical channels connected through a transverse channel. Specifically, both the cross-sectional shape of the transverse passage and the cross-sectional shape of the vertical passage are polygonal. The working principle of the skimmer is as follows: the slag and molten iron coming out of the tap hole, because of their different densities, the slag floats on top of the molten iron. After the skimmer is full of molten iron, molten iron can pass through because the molten iron branch ditch 12 and the main ditch 11 communicate with each other through the transverse passage and the vertical passage. The slag is blocked by the baffle plate 1 and cannot flow into the molten iron branch ditch 12, thereby completing the slag-iron shunting work. The purpose of using the skimmer is to ensure the separation of slag and iron, no iron in the slag, no slag in the iron, no overflow of slag and iron, and normal and safe production.

In this embodiment, the reinforcement part includes a pouring layer 6 and a base layer 7, the pouring layer 6 is cast on the base layer 7, and the base layer 7 is made of bricks. The base layer 7 not only has better erosion resistance and corrosion resistance, but also only needs to replace the base layer 7 when it is damaged, which has the advantages of short maintenance time and low maintenance cost.

In this embodiment, the reinforcing part further includes a steel plate shell 8 , which is arranged on the outside of the pouring layer 6 and the foundation layer 7 . Preferably, the height of the steel plate shell 8 is the same as the sum of the height of the pouring layer 6 and the base layer 7, and the steel plate shell 8 further improves the strength of the reinforcement.

In this embodiment, the molten iron branch ditch 12 is provided with an iron taphole 2 .

The working principle of the utility model is as follows:

When the main ditch 11 of the blast furnace or the bottom of the skimmer corrode seriously, it is necessary to drain the molten iron in the main ditch 11 and the skimmer for repair.

When repairing is required, the demolition part 5 is directly excavated by an excavator. The area of the demolition part 5 is 500mm x 260mm.

After the molten iron in the skimmer is put away, the residual molten iron is blown out with compressed air, and then the main ditch 11 is repaired in a large area or repaired in a small area.

In the description of the embodiment of the present utility model, it should also be noted that, unless otherwise specified and limited, if the terms "setting" and "connection" appear, they should be understood in a broad sense, for example, it can be a fixed connection or a A detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary, and it may be an internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Apparently, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in various forms can also be made. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the scope of protection of the utility model.

Claims (10)

1. A novel slag-iron separation structure for a blast furnace is characterized in that: the method comprises the following steps:

a main channel (11), the tail end of which is provided with a skimmer, and the skimmer separates molten iron (9) and slag (10); moreover, the main ditch (11) is provided with a slag outlet (3);

the molten iron branch ditches (12) are communicated with the main ditch (11), and the molten iron branch ditches (12) are used for collecting the molten iron (9); a baffle plate (1) is arranged between the main ditch (11) and the molten iron branch ditch (12);

a reinforcing part arranged at one side of the main ditch (11) and the molten iron branch ditch (12); and the reinforcing part is preset with a dismantling part (5), and the dismantling part (5) is close to the molten iron branch channel (12).

2. The novel slag-iron separation structure for the blast furnace according to claim 1, characterized in that: the length of the dismantling part (5) is 500mm +/-20 mm.

3. The novel slag-iron separation structure for the blast furnace according to claim 1, characterized in that: the height of the dismantling part (5) is 260mm +/-20 mm.

4. The novel slag-iron separation structure for the blast furnace as claimed in claim 1, wherein: the width of the removal part (5) is the same as the width of the reinforcement part.

5. The novel slag-iron separation structure for the blast furnace according to claim 1, characterized in that: the slag skimmer is provided with a slag iron channel, and the slag iron channel comprises two vertical channels communicated through a transverse channel.

6. The novel slag-iron separation structure for the blast furnace according to claim 5, wherein: the cross-sectional shape of the transverse channel and the cross-sectional shape of the vertical channel are both polygonal.

7. The novel slag-iron separation structure for the blast furnace as claimed in claim 1, wherein: the reinforcing part comprises a pouring layer (6) and a foundation layer (7), the pouring layer (6) is poured and formed on the foundation layer (7), and the foundation layer (7) is formed by laying bricks.

8. The novel slag-iron separation structure for the blast furnace according to claim 7, wherein: the reinforcing part comprises a steel plate outer shell (8), and the steel plate outer shell (8) is arranged on the outer sides of the pouring layer (6) and the foundation layer (7).

9. The novel slag-iron separation structure for the blast furnace according to claim 8, wherein: the height of the steel plate shell (8) is the same as the sum of the height of the pouring layer (6) and the height of the foundation layer (7).

10. The novel slag-iron separation structure for the blast furnace according to claim 1, characterized in that: the molten iron branch channel (12) is provided with a taphole (2).

Images