CN217173776U

CN217173776U - Tapping system of smelting reduction furnace

Info

Publication number: CN217173776U
Application number: CN202220916497.1U
Authority: CN
Inventors: 张雄伟; 徐涛; 张勇; 卜二军; 任俊; 程鹏; 魏星; 杨璐
Original assignee: Inner Mongolia Saisipu Technology Co ltd
Current assignee: Inner Mongolia Saisipu Technology Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-08-12
Anticipated expiration: 2032-04-18

Abstract

A tapping system of a smelting reduction furnace comprises a tapping device (2), wherein a tapping channel (4), an abnormal molten iron outlet (5) and an accident residual iron outlet (6) are arranged on the tapping device (2); the tapping device (2) is arranged at the upper part of the tapping device (2), and when the molten iron liquid level in the tapping device (2) reaches the overflow height, the overflowed molten iron is drained to a ladle (7) placed at a specified position; the abnormal molten iron outlet (5) is arranged in the middle of the tapping device (2), and when the upper surface of the tapping device (2) has a solidification phenomenon or has already solidified due to long-time damping down, the abnormal molten iron with lower temperature at the lower part is discharged outside the tapping device (2); the accident residual iron hole (6) is arranged at the bottommost position of the tapping device (2) and completely discharges molten iron in the tapping device (2) and the smelting reduction furnace (1) when the whole system is subjected to damping down and large overhaul. The system can also meet the production requirements of special conditions, and reduce direct or indirect economic loss caused by equipment maintenance. The system is increasingly mature in the smelting reduction iron-making process, and has quite wide application prospect.

Description

Tapping system of melting reduction furnace

Technical Field

Embodiments of the present disclosure relate generally to the field of ironmaking equipment technology, and more particularly, to a smelting reduction furnace tapping system.

Background

In the traditional blast furnace smelting, solid raw materials such as iron ore, coke, flux and the like are fed into a blast furnace in batches by a furnace top charging device according to a specified proportioning ratio, the material level of a furnace throat is kept at a certain height, the coke and the ore form an alternate layered structure in the furnace, and the ore material is gradually reduced, melted into iron and slag in the descending process, gathered in a furnace cylinder and discharged from an iron notch and a slag notch at regular intervals. However, with the proposal and implementation of a series of environmental protection policies such as 'carbon peak carbon neutralization' and the like in China, the smelting process of the smelting reduction furnace is developed. The smelting process of smelting reduction mainly cancels the heavy pollution procedures of sintering, pelletizing and the like in the traditional blast furnace smelting process, directly sprays coal dust, mineral powder and solvent into the smelting reduction furnace through corresponding conveying equipment in a high-speed jet flow state, thereby generating the billowing of slag-iron mixture, and the phenomenon that the upper part of the surface of molten iron is covered with a thicker slag layer is generated due to the physical property of the slag-iron in the process, thereby simultaneously completing the separation of the slag-iron mixture in the furnace. Along with the continuous rising of the liquid level of the molten iron in the furnace, the liquid level of the molten iron in the tapping device communicated with the furnace also rises, and when the liquid level of the molten iron reaches the position of the overflow port, the molten iron begins to overflow outwards into the ladle. Although the prior smelting reduction furnace smelting process tapping system completely cancels the process operations of tapping at regular tapping holes and blocking the tapping holes compared with the tapping at a higher furnace smelting, the siphoning principle is skillfully adopted for tapping, thereby greatly reducing the operation frequency and the working strength before tapping and greatly improving and optimizing the operation before tapping. However, in some emergency situations, the existing tapping system of the smelting reduction furnace is difficult to or cannot meet the production and tapping operation under special working conditions, so that the operation rate of the smelting reduction furnace is greatly reduced, the economic benefit and long-term development of a company are directly affected, and the phenomenon brings attention to leaders of related production units at present.

SUMMERY OF THE UTILITY MODEL

According to an embodiment of the present disclosure, a tapping system for a smelting reduction furnace is provided to solve the problems in the prior art, so as to solve the problem that the existing tapping system for a smelting reduction furnace cannot meet the requirements of the existing process.

In order to solve the technical problem, the utility model discloses a technical scheme as follows:

a tapping system of a smelting reduction furnace comprises a tapping device 2, wherein a tapping runner 4, an abnormal molten iron outlet 5 and an accident residual iron outlet 6 are arranged on the tapping device 2;

the tapping device 2 is arranged at the upper part of the tapping device 2, and guides overflowed molten iron to a ladle 7 placed at a specified position when the molten iron liquid level in the tapping device 2 reaches an overflow height;

the abnormal molten iron outlet 5 is arranged in the middle of the tapping device 2, and discharges the abnormal molten iron with lower temperature at the lower part to the outside of the tapping device 2 when the upper surface of the tapping device 2 has a solidification phenomenon or has already solidified due to long-time damping down;

the accident scrap hole 6 is provided at the lowermost position of the tapping device 2, and completely discharges molten iron in the tapping device 2 and the smelting reduction furnace 1 when the whole system is subjected to a large overhaul at a standstill.

Further, the smelting reduction furnace 1 is further included, and the smelting reduction furnace 1 is communicated with the iron tapping device 2 through a smelting reduction furnace connecting passage 8.

Further, a smelting reduction furnace gas discharge channel 3 is arranged at the top of the smelting reduction furnace 1.

Further, the tapping system of the smelting reduction furnace is also provided with an abnormal molten iron discharging iron runner 9 which is communicated with the smelting reduction furnace connecting channel 8 and is used for guiding the molten iron in an abnormal state to an important channel of an accident iron pit 10.

Further, the tapping system of the smelting reduction furnace is also provided with an accident iron pit 10 which is communicated with the abnormal molten iron discharging iron ditch 9 and is used for containing the molten iron discharged in the abnormal state.

The utility model discloses an advantage and effect: the tapping system of the smelting reduction furnace is different from the limitation of the existing stemming plugging type tapping system, can realize normal tapping operation without stemming plugging, and directly eliminates smoke dust and accompanying noise pollution generated by stemming drilling. The system is different from the limitation of the existing stemming blocking type tapping system, the operation intensity of operators before iron and the direct manual operation rate can be greatly reduced, so that the safety before iron is improved, and the investment of manpower and material resources is reduced; the system is different from the limitation of the existing stemming blocking type tapping system, and can also realize continuous tapping operation, so that the production efficiency is greatly improved; the system is different from the limitation of the existing stemming plugging type tapping system, can meet the production requirement of special conditions, and reduces the direct or indirect economic loss caused by equipment maintenance. The system is increasingly mature in the smelting reduction iron-making process, and has quite wide application prospect.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.

Drawings

FIG. 1 is a drawing of a tapping system of a smelting reduction furnace according to the present invention.

FIG. 2 is a plan view of a tapping system of a smelting reduction furnace according to the present invention.

1. A smelting reduction furnace; 2. a tapping device; 3. a smelting reduction furnace gas discharge channel; 4. tapping a runner; 5. an abnormal molten iron outlet; 6. an accident scrap hole; 7. a ladle; 8. the tapping device is connected with the smelting reduction furnace through a channel; 9. discharging abnormal molten iron out of the iron runner; 10. accident iron pit

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly and completely described below. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

The technical solution of the present invention will be further explained and illustrated with reference to the following specific embodiments.

The novel tapping system of the smelting reduction furnace mainly comprises a smelting reduction furnace 1, a tapping device 2, a smelting reduction furnace gas discharge channel 3, a tapping channel 4, an abnormal molten iron discharge port 5, an accident residual iron port 6, a ladle 7, a tapping device and smelting reduction furnace connecting channel 8, an abnormal molten iron discharge iron channel accident residual iron channel 9 and an accident iron pit 10.

The tapping system of the smelting reduction furnace is provided with a smelting reduction furnace 1, has the functions of producing molten iron and molten slag by carrying out a series of physical and chemical reactions on smelting raw materials entering the smelting reduction furnace and storing the molten iron and the molten slag, and is a core equipment device;

the tapping system of the smelting reduction furnace is also provided with a tapping device 2 which is used for storing molten iron in a certain time to ensure that the tapping device and a connecting channel 8 of the smelting reduction furnace are in a liquid-sealed safe production state;

the tapping system of the smelting reduction furnace is also provided with a smelting reduction furnace gas discharge channel 3 which mainly has the function of transmitting the gas generated in the smelting reduction furnace to a downstream process for further processing;

the tapping system of the melting reduction furnace is also provided with a tapping runner 4 which mainly guides overflowed molten iron to a ladle 7 placed at a designated position when the molten iron level in the tapping device 2 reaches an overflow height;

the tapping system of the melting reduction furnace is also provided with an abnormal molten iron outlet 5 which is mainly used for discharging abnormal molten iron with lower temperature at the lower part outside the tapping device 2 when the upper surface of the tapping device 2 has a solidification phenomenon or has already solidified due to long-time damping down;

the accident residual iron hole 6 of the tapping system of the smelting reduction furnace is arranged at the bottommost position of the tapping device 2 and is an important hole opening for completely discharging molten iron in the tapping device 2 and the smelting reduction furnace 1 when the whole system is in damping down and overhaul;

further, the tapping system of the smelting reduction furnace is also provided with a ladle 7 which is stored at the other end of the tapping runner 4, is important equipment for receiving molten iron and transferring the molten iron to the next process when the tapping device 2 overflows iron, and has the function of receiving the molten iron from the top to the bottom;

furthermore, the tapping system of the smelting reduction furnace is also provided with a tapping device and smelting reduction furnace connecting channel 8 which is a key device for connecting the smelting reduction furnace 1 and the tapping device 2 and is an important channel for the molten iron in the smelting reduction furnace 1 to flow to the outside;

further, the tapping system of the smelting reduction furnace is also provided with an abnormal molten iron discharging iron groove accident residual iron groove 9 which is an important channel for guiding the molten iron in an abnormal state to an accident iron pit 10;

further, the tapping system of the smelting reduction furnace is also provided with an accident iron pit 10 which is mainly used for containing molten iron discharged in an abnormal state and has the advantages of convenience in cleaning and large storage capacity.

Example 1

A novel tapping system of a smelting reduction furnace. Under the normal production condition, the smelting reduction furnace 1 is communicated with the tapping device 2 through a connecting channel 8, the liquid level of molten iron in the smelting reduction furnace 1 and the tapping device 2 gradually rises along with the continuous production until the liquid level reaches the height of an overflow port of the tapping device 2 or the liquid level reaches the overflow height under the action of the outside, the molten iron overflows, and the molten iron sequentially flows into a ladle 7 through a tapping runner 4 and then is transported to the next procedure for operation. If the phenomenon of temperature drop by a large margin can appear when long-time blowing down overhauls appears, can appear condensing and then lead to recovering the normal production initial stage and can not normally carry out the tapping operation in 2 tops of tapping device along with, can open the outer mouth of escape 5 of unusual molten iron at this moment and make its inside low temperature molten iron flow partly to accident iron pit 10 through the outer incomplete iron runner 9 of iron runner accident of unusual molten iron outward, it accelerates original molten iron to surge the intensification to reserve sufficient reaction space, until tapping device 2 phenomenon of condensing eliminates. If the damping down overhaul is to be carried out, the accident residual iron opening 6 can be opened, and as much molten iron as possible is guided to the accident iron pit 10 through the abnormal molten iron discharging iron groove accident residual iron groove 9, so that the preliminary period preparation is carried out for overhaul.

Although the embodiments of the present invention have been described above, the description is only for the convenience of understanding the present invention, and the present invention is not limited thereto. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The tapping system of the smelting reduction furnace is characterized by comprising a tapping device (2), wherein a tapping channel (4), an abnormal molten iron outlet (5) and an accident residual iron outlet (6) are arranged on the tapping device (2);

the tapping device (2) is arranged at the upper part of the tapping device (2), and when the molten iron level in the tapping device (2) reaches the overflow height, the overflowed molten iron is drained to a ladle (7) placed at a specified position;

the abnormal molten iron outlet (5) is arranged in the middle of the tapping device (2), and when the upper surface of the tapping device (2) has a solidification phenomenon or has already solidified due to long-time damping down, the abnormal molten iron with lower temperature at the lower part is discharged outside the tapping device (2);

the accident residual iron port (6) is arranged at the bottommost position of the tapping device (2), and completely discharges molten iron in the tapping device (2) and the smelting reduction furnace (1) when the whole system is in a high-speed maintenance state.

2. A tapping system for a smelting reduction furnace according to claim 1, further comprising a smelting reduction furnace (1), wherein the smelting reduction furnace (1) is communicated with the tapping device (2) through a smelting reduction furnace connecting passage (8).

3. A tapping system for a smelting reduction furnace according to claim 1, wherein a smelting reduction furnace gas discharge passage (3) is provided at a top of the smelting reduction furnace (1).

4. The tapping system of a smelting reduction furnace according to claim 1, wherein the tapping system of a smelting reduction furnace is further provided with an abnormal molten iron discharging runner (9) communicating with the smelting reduction furnace connecting passage (8) for guiding molten iron in an abnormal state to an important passage of the accident iron pit (10).

5. The tapping system of a smelting reduction furnace according to claim 1, wherein the tapping system of a smelting reduction furnace is further provided with an accident iron pit (10) communicating with the abnormal molten iron discharging runner (9) for containing molten iron discharged in an abnormal state.