CN212451486U

CN212451486U - Water-cooled wall structure of smelting reduction furnace

Info

Publication number: CN212451486U
Application number: CN202020865598.1U
Authority: CN
Inventors: 张勇; 徐涛; 周海川; 刘志国; 任俊; 昝智; 程鹏; 卜二军; 逄博; 张乐
Original assignee: Inner Mongolia Saisipu Technology Co ltd
Current assignee: Inner Mongolia Saisipu Technology Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2021-02-02
Anticipated expiration: 2030-05-21

Abstract

The application discloses melting reduction furnace water-cooling wall structure, water-cooling wall structure includes the stove outer covering, refractory material, water-cooling tube, the stove outer covering inboard sets up refractory material, the inside water-cooling tube that is provided with of refractory material, water-cooling tube passes through connection structure and stove outer covering fixed connection, connection structure is fixed pin axle, fixed pin axle is the round steel, weld through the welded mouth of pipe of stove outer covering trompil between the one end of round steel and the stove outer covering, the other end and the water-cooling tube of round steel are through the connection steel sheet welding. The water-cooled wall structure of the smelting reduction furnace has a good cooling effect, and greatly prolongs the smelting life of the water-cooled wall and the smelting furnace.

Description

Water-cooled wall structure of smelting reduction furnace

Technical Field

The application relates to cooling wall equipment, in particular to a water-cooled wall structure of a smelting reduction furnace.

Background

Because of the high energy consumption and high emission of the blast furnace ironmaking system, the metallurgical industry has been developing non-blast furnace ironmaking processes with no coke or less coke for a long time. The direct smelting reduction iron-making process can directly smelt preheated iron ore powder and blow coal powder as reducing agent and heat source of the system. Compared with the traditional blast furnace ironmaking process, the smelting reduction ironmaking process saves two links of sintering and coking, and saves a large amount of investment and operation cost under the same capacity. The water wall system of the smelting reduction furnace is an important component of a furnace body, is positioned on refractory materials of a furnace cylinder and is connected with a vaporization cooling flue, and a contact area in the furnace comprises slag, a gas combustion area, a gas chamber and the like. In the operation process, the water-cooled wall takes away heat acting on the furnace wall in the furnace through closed circulation demineralized water, so that the furnace shell and the water-cooled wall are protected, and the whole furnace body forms a stable reaction container.

Disclosure of Invention

In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a water wall structure of a smelting reduction furnace, which has a good cooling effect and improves the smelting life of the water wall and the smelting furnace.

The application provides a pair of melting reduction furnace water-cooling wall structure, water-cooling wall structure includes stove outer covering (4), refractory material (1), water-cooling tube (5), stove outer covering (4) inboard sets up refractory material (1), inside water-cooling tube (5) that is provided with of refractory material (1), water-cooling tube (5) are through connection structure and stove outer covering (4) fixed connection, connection structure is fixed pin axle (3), fixed pin axle (3) are the round steel, weld through stove outer covering trompil welded mouth of pipe between the one end of round steel and the stove outer covering, the other end of round steel and water-cooling tube weld through connection steel sheet (2).

Furthermore, the fixed pin shaft (3) has a length of 220mm,

the round steel of (1).

Furthermore, a plurality of three-jaw anchoring nails (6) are welded on the water-cooling pipe in the furnace inner side direction, three jaws of the three-jaw anchoring nails (6) are 25mm long,

the three directions of round steel perpendicular to condenser tube tangent line weld, the welding of the cambered surface that the claw perpendicular to water-cooling board of horizontal direction is located, and the claw of two upper and lower directions is 30 jiaos with the anchor nail of horizontal direction respectively to perpendicular to condenser tube tangent line welding.

Furthermore, the water cooling pipes are double-layer water cooling pipes, the two layers of cooling water pipes are staggered, the horizontal distance between the central lines of the two adjacent cooling water pipes is 95-100mm, the central line distance between the inner layer of cooling water pipe and the outer layer of cooling water pipe is 90-95mm, the connecting steel plate (2) of the double-layer water cooling pipes is a steel plate with the width of 150 plus one 200mm and the thickness of 8-13mm, the outer side cooling water pipe is tightly attached to the middle of the connecting steel plate (2), the shape of an opening of 60-75 degrees is formed after half-surrounding, and the two ends of the connecting steel plate are connected with the water cooling pipes close.

Further, the thickness of the refractory (1) from the furnace shell to the furnace interior is 200-250 mm.

Furthermore, the water cooling tube is a single-layer water cooling tube, and the thickness of the refractory material (1) from the furnace shell to the direction in the furnace is 120-150 mm.

Further, a water-cooled wall structure of a smelting reduction furnace is provided, the water-cooled wall structure comprises a furnace shell (4), a refractory material (1), a water-cooled tube (5) and a slag layer (7), the inner side of the furnace shell (4) is provided with the refractory material (1), the refractory material (1) is close to the inner side of the furnace and is provided with the slag layer (7), the water-cooled tube is arranged inside the refractory material (1), the water-cooled tube is fixedly connected with the furnace shell (4) through a connecting structure, the connecting structure is a fixing pin shaft (3), the fixing pin shaft (3) is round steel, one end of the round steel is welded with the opening of the furnace shell through a hole welded, and the other end of the round steel is welded with the water-cooled tube through a connecting steel plate (2).

Further, the other end of the three-jaw anchoring nail (6) is connected with the slag layer (7).

Further, the slag layer (7) is not in contact with the water cooling pipe.

Compared with the prior art, the beneficial effects of this application are: the water cooling wall of the smelting reduction furnace can prevent high-temperature iron slag and coal gas generated in the smelting reduction furnace from impacting a furnace shell during production. Due to the cooling effect of the cooling water, a slag layer can be formed on the surface of the water-cooled wall, and the effect of reducing the heat loss of the smelting reduction furnace is achieved. According to the working conditions of different functional areas in the smelting reduction furnace, the difference between a single-layer water cooling pipe and a double-layer water cooling pipe is designed, so that the excessive heat of an extremely hot area is taken away without damaging a furnace shell, and the excessive heat taken away in the area with less heat is avoided, so that the heat loss is increased. The anchoring nail is welded on the inner side of the water-cooling fireplace and used for spraying refractory materials when the water-cooling fireplace is started for the first time, slag is hung in the later production process, and the effects of protecting a water-cooling wall and reducing heat load loss are achieved. When the closed-cycle demineralized water boiler operates, the water-cooled wall takes away heat acting on the boiler wall in the boiler through the closed-cycle demineralized water, so that the boiler shell and the water-cooled wall are protected, and the whole boiler body forms a stable reaction container. The service life of the reaction vessel is prolonged, and the cooling effect is enhanced.

It should be understood that what is described in this summary section is not intended to limit key or critical features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will become apparent from the following description.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of a stave structure of a smelting reduction furnace;

FIG. 2 is a schematic view of a connection structure of a fixed pin shaft, a steel plate and a water-cooling pipe;

FIG. 3 is a schematic structural diagram of a connecting steel plate of a double-layer water-cooling pipe;

fig. 4 is a schematic structural view of a three-jaw anchor.

Wherein: 1-refractory material, 2-connecting steel plate, 3-fixed pin shaft, 4-furnace shell, 5-water cooling tube, 6-three-jaw anchoring nail and 7-slag layer.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for the convenience of description, only the portions relevant to the application are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 to 4, an embodiment of the present application provides a water-cooled wall structure of a smelting reduction furnace, where the water-cooled wall structure includes a furnace shell 4, a refractory material 1, and a water-cooled tube 5, the refractory material 1 is disposed inside the furnace shell 4, the water-cooled tube 5 is disposed inside the refractory material 1, the water-cooled tube 5 is fixedly connected to the furnace shell 4 through a connecting structure, the connecting structure is a fixed pin 3, the fixed pin 3 is a round steel,one end of the round steel is welded with the furnace shell through a furnace shell opening welded pipe orifice, and the other end of the round steel is welded with the water cooling pipe through a connecting steel plate 2. The fixed pin shaft 3 has a length of 220mm,

the round steel of (1).

As shown in fig. 4, a plurality of three-jaw anchoring nails 6 are welded to the water-cooling pipe in the furnace inner direction, three jaws of the three-jaw anchoring nails 6 are 25mm long,

As shown in the left part of fig. 1 and fig. 3, the water cooling pipes are double-layer water cooling pipes, the two layers of cooling water pipes are staggered with each other, the horizontal distance between the central lines of the two adjacent cooling water pipes is 99mm, the central line distance between the inner layer of cooling water pipe and the outer layer of cooling water pipe is 95mm, the connecting steel plate 2 of the double-layer water cooling pipe is a steel plate with the width of 180mm and the thickness of 12mm, the outer side cooling water pipe is tightly attached to the middle of the connecting steel plate 2, the shape of an opening of 72 degrees is formed after half-surrounding, and the two ends of the.

The thickness of the refractory 1 was 240mm from the furnace shell toward the inside of the furnace.

As shown in the right part of FIG. 1, the water-cooled tube is a single-layer water-cooled tube, and the thickness of the refractory 1 is 140mm from the furnace shell toward the inside of the furnace.

In addition, after the furnace is opened, along with the peeling and erosion of the refractory material, the refractory material outside the cooling water pipe on the inner side basically and completely falls off, but due to the cooling effect of the water cooling plate and the fixing effect of the anchoring nail, a certain amount of slag liquid drops can be adhered to the water cooling plate, along with the continuous solidification and melting of the slag on the water cooling plate, after the balance is achieved, a slag protective layer with a certain thickness is formed on the water cooling wall, at the moment, the water cooling wall structure comprises a furnace shell 4, a refractory material 1, a water cooling pipe 5 and a slag hanging layer 7, the refractory material 1 is provided with the refractory material 1 close to the inner side of the furnace, the water cooling pipe is arranged inside the refractory material 1 and fixedly connected with the furnace shell 4 through a connecting structure, the connecting structure is a fixed pin shaft 3, the fixed pin shaft 3 is round steel, one end of the round steel is welded with the furnace shell through a pipe opening of the furnace shell, the other end of the round steel is welded with the water cooling pipe through a connecting steel plate 2.

A plurality of three-jaw anchoring nails 6 are welded on the water-cooling pipe in the furnace inner side direction, three jaws of the three-jaw anchoring nails 6 are 25mm long,

The other end of the three-jaw anchoring nail 6 is connected with the slag layer 7. The slag layer 7 is not contacted with the water cooling pipe. That is, the thickness of the eroded refractory material is sufficient to ensure that the water cooling tubes are not damaged, thereby ensuring life.

In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a melting reduction furnace water-cooling wall structure, its characterized in that, water-cooling wall structure includes stove outer covering (4), refractory material (1), water-cooling tube (5), stove outer covering (4) inboard sets up refractory material (1), inside water-cooling tube (5) that is provided with of refractory material (1), water-cooling tube (5) are through connection structure and stove outer covering (4) fixed connection, connection structure is fixed pin axle (3), fixed pin axle (3) are the round steel, weld through stove outer covering trompil welded mouth of pipe between the one end of round steel and the stove outer covering, the other end of round steel and water-cooling tube are through connecting steel plate (2) welding.

2. A molten reduction furnace water wall structure according to claim 1, wherein the fixing pin (3) is a round bar having a length of 220mm and a diameter of 60 mm.

3. A molten reduction furnace water-cooled wall structure according to claim 1, wherein a plurality of three-jaw anchor nails (6) are welded to the water-cooled tube in the furnace inside direction, three jaws of the three-jaw anchor nails (6) are welded to a cooling water pipe tangent line in three directions of round steel of 25mm in length and 10mm in diameter, the jaw in the horizontal direction is welded to an arc surface where the water-cooled plate is located, and the upper and lower jaws are welded to the anchor nail in the horizontal direction at an angle of 30 ° and to the cooling water pipe tangent line in a perpendicular manner.

4. The smelting reduction furnace water-cooled wall structure as set forth in claim 3, characterized in that the water-cooled tubes are double-layer water-cooled tubes, the two layers of cooling water tubes are staggered with each other, the horizontal distance between the center lines of two adjacent cooling water tubes is 95-100mm, the distance between the center lines of the inner and outer layers of cooling water tubes is 90-95mm, the connecting steel plate (2) of the double-layer water-cooled tubes is a steel plate with a width of 150 and a thickness of 8-13mm, the outer cooling water tube is tightly attached to the middle of the connecting steel plate (2), a shape with an opening of 60-75 ° is formed after half-surrounding, and both ends are lapped on the water-cooled tube near the inner side of.

5. The molten reduction furnace water cooled wall structure according to claim 4, wherein the thickness of the refractory (1) is 200-250mm from the shell toward the inside of the furnace.

6. The smelting reduction furnace water-cooled wall structure as set forth in claim 2, wherein the water-cooled tubes are single-layer water-cooled tubes, and the thickness of the refractory (1) from the shell of the furnace to the direction of the furnace is 120-150 mm.

7. The utility model provides a melting reduction furnace water-cooling wall structure, its characterized in that, water-cooling wall structure includes stove outer covering (4), refractory material (1), water-cooled tube (5), hangs slag blanket (7), stove outer covering (4) inboard sets up refractory material (1), and refractory material (1) are close to the stove inner side and are provided with and hang slag blanket (7), the inside water-cooled tube that is provided with of refractory material (1), the water-cooled tube passes through connection structure and stove outer covering (4) fixed connection, connection structure is fixed pin axle (3), fixed pin axle (3) are the round steel, weld through the mouth of pipe of stove outer covering trompil welded between the one end of round steel and the stove outer covering, the other end and the water-cooled tube of round steel pass through connecting steel plate (2) welding.

8. A molten reduction furnace water wall structure according to claim 7, wherein a plurality of three-jaw anchor nails (6) are welded to the water cooling tube in the furnace inside direction, three jaws of the three-jaw anchor nails (6) are welded to each other with round steel of 25mm and 10mm in length in a direction perpendicular to the tangent line of the cooling water tube, the jaw in the horizontal direction is welded to the arc surface where the water cooling plate is located, and the upper and lower jaws are welded to the anchor nail in the horizontal direction at an angle of 30 ° and perpendicular to the tangent line of the cooling water tube.

9. A molten reducing furnace water wall structure according to claim 8, wherein the other end of the three-jaw anchor nail (6) is connected to the slag layer (7).

10. A molten reduction furnace water wall structure according to claim 9, wherein the slag layer (7) is not in contact with the water cooling tubes.