WO2022206206A1

WO2022206206A1 - High-efficiency smelting reduction circulating cooling equipment

Info

Publication number: WO2022206206A1
Application number: PCT/CN2022/076642
Authority: WO
Inventors: 张冠琪; 陈庆孟; 王金霞; 张光磊; 张晓峰
Original assignee: 山东墨龙石油机械股份有限公司
Priority date: 2021-04-02
Filing date: 2022-02-17
Publication date: 2022-10-06
Also published as: CN113390266A

Abstract

The present application provides a high-efficiency smelting reduction circulating cooling equipment. A cooling apparatus is arranged as a layered structure, and comprises a hot-side cooling layer and a cold-side protective layer. The hot-side cooling layer is attached to a refractory layer, and the hot-side cooling layer comprises a first metal housing and a cooling pipe arranged inside the first metal housing. The cooling pipe penetrates the first metal housing and extends to form a liquid intake pipe and a liquid discharge pipe. The cold-side protective layer is attached to the hot-side cooling layer and clamps the hot-side cooling layer together with the refractory layer. The cold-side protective layer comprises a second metal housing as well as a liquid intake through hole and a liquid discharge through hole which penetrate the second metal housing. The liquid intake pipe passes through the liquid intake through hole, and the liquid discharge pipe passes through the liquid discharge through hole. According to the present application, a cooling apparatus is arranged in a transition zone of a smelting reduction furnace, so that the cooling apparatus may reduce the surface temperature of a refractory layer. As a result, a stable slag iron solidification layer is formed on the surface of the refractory layer in the transition zone to protect the refractory layer, thereby prolonging the service life of the smelting reduction furnace.

Description

A high-efficiency smelting reduction circulating cooling equipment

This application claims the priority of the Chinese patent application with the application number 202110362292.3 and the invention title "A cooling device for the transition zone of a smelting reduction furnace", which was filed with the China Patent Office on April 2, 2021, the entire contents of which are by reference Incorporated in this application.

technical field

The application belongs to the technical field of metallurgical equipment, and specifically provides a high-efficiency smelting reduction circulating cooling device.

Background technique

The HIsmelt smelting reduction process takes the smelting reduction furnace as the core, and produces high-quality pure iron by directly injecting iron ore powder and non-coking coal into the molten molten iron pool in the smelting reduction furnace. Compared with the traditional blast furnace ironmaking process, the HIsmelt smelting reduction process has lower requirements for raw materials, and saves the two links of sintering and coking. Under the same production capacity, the HIsmelt smelting reduction process can save a lot of investment and operating costs.

However, the working conditions in the smelting reduction furnace are very bad, especially in the transition zone where slag and iron coexist, and the service life of the refractory layer determines the length of the smelting reduction furnace. The erosion mechanism of the refractory layer mainly includes thermal stress damage, mechanical erosion and friction. The refractory layer is in direct contact with the liquid slag iron in the smelting reduction furnace, so the temperature in this area is the highest temperature in the smelting reduction furnace, usually higher than 1400°C. In addition, the furnace pressure of the smelting reduction furnace is usually higher than 65Kpa, and the pressure in the transition zone changes with the change of the slag iron stock. Various damages. In addition, the smelting reduction process sprays the material into the molten pool through the side-blown material spray gun, forming a "spring" phenomenon to vigorously stir the molten pool. The refractory layer in the transition zone of the smelting reduction furnace is constantly swept away by the slag-iron eddy current formed by the phenomenon of "spring", which seriously erodes the refractory layer. The smelting reduction process adopts intermittent tapping and slag tapping. The liquid level of slag and iron will rise and fall significantly, and the transition zone is just within the range of the rise and fall of the liquid level of slag and iron. The surface of the refractory layer produces mechanical erosion and friction, which seriously affect its service life.

Most of the smelting reduction furnaces in the traditional technology protect the refractory layer by the slag-iron solidified layer formed by the refractory layer itself. Poor, and cannot be effectively controlled, it is easy to fall off on the refractory layer, resulting in the erosion of the refractory layer, so the volume continues to decrease or even form a cavity or collapse. When the refractory layer is seriously damaged, it may cause burn-through of the furnace body and affect the melting reduction furnace. safe production and reduce the service life of the smelting reduction furnace.

SUMMARY OF THE INVENTION

According to various embodiments of the present application, the present application provides a high-efficiency smelting reduction circulating cooling device, the cooling device is arranged in a layered structure, and includes a hot-side cooling layer and a cold-side protective layer, the hot-side cooling layer and the The refractory layers are in contact with each other, and the hot surface cooling layer includes a first metal shell and a cooling pipe arranged inside the first metal shell, and the cooling pipe penetrates the first metal shell and extends to form an inlet. Liquid pipe and liquid outlet pipe;

The cold surface protection layer is attached to the hot surface cooling layer and clamps the hot surface cooling layer together with the refractory layer. The cold surface protection layer includes a second metal shell and penetrates through the second metal layer. The liquid inlet through hole and the liquid outlet through hole of the casing, the liquid inlet pipe passes through the liquid inlet through hole, and the liquid outlet pipe passes through the liquid outlet through hole.

Preferably, the cooling pipe comprises a first cooling pipe and a second cooling pipe, and the centerlines of the first cooling pipe and the second cooling pipe are in the same plane;

The first cooling pipe and the second cooling pipe respectively extend inside the first metal shell, and are extended back through a U-shaped bend, so as to form a serpentine arrangement in a reciprocating manner.

Preferably, the first cooling pipe has a first liquid inlet pipe and a first liquid outlet pipe, and the second cooling pipe has a second liquid inlet pipe and a second liquid outlet pipe;

The first liquid inlet pipe and the second liquid inlet pipe jointly pass through the liquid inlet through hole, and the first liquid outlet pipe and the second liquid outlet pipe jointly pass through the liquid outlet through hole.

Preferably, the first metal shell is integrally cast with pure copper or copper alloy, and the thickness of the first metal shell is 80-100 mm;

The second metal shell is made of stainless steel as a whole, and the thickness of the second metal shell is 30-50mm.

Preferably, a protection steel pipe is provided in the liquid inlet through hole and the liquid outlet through hole of the cold surface protective layer, and one end of the protection steel pipe is welded with the liquid inlet through hole and the liquid outlet through hole Fixing; the other end of the protective steel pipe extends along the axial direction of the liquid inlet through hole and the liquid outlet through hole until it passes through the furnace shell of the smelting reduction furnace, and is welded and fixed with the furnace shell.

Preferably, the hot surface cooling layer is provided with a first lateral snapping protrusion on the side that is in contact with the refractory layer, and the hot surface cooling layer is provided on the side that is in contact with the cold surface protective layer. There is a second lateral card protrusion;

The cold surface protective layer is provided with a second lateral clipping recess on the side that is in contact with the hot surface cooling layer, and the second lateral clipping recess is clipped and fixed with the second lateral clipping projection.

Preferably, the first lateral clips are evenly distributed on the hot surface cooling layer, and the cross-section of the first lateral clips is a rectangle or a dovetail groove;

The second lateral clipping protrusion has a downward inclination angle relative to the horizontal plane, and the inclination angle is 5°-10°; the lateral clipping concave has an upward inclination angle relative to the horizontal plane, and the inclination angle is 5° °-10°.

Preferably, an arc-shaped protrusion is provided on the top of the cold surface protective layer, and an arc-shaped groove is provided on the side of the smelting reduction furnace that adheres to the cold surface protective layer;

The cold surface protective layer and the smelting reduction furnace are fixed through the snap connection of the arc-shaped protrusion and the arc-shaped groove.

Preferably, the furnace shell and the cooling device are installed and fixed by an elastic member, and the elastic member includes a screw that penetrates the furnace shell and is connected to the cold surface protective layer, and an elastic member that is opposed to the top of the screw. abutment;

The elastic abutment provides axial pressure to the screw and allows the screw to move in the axial direction.

Preferably, the preparation method of the high-efficiency smelting reduction circulating cooling equipment comprises the following steps:

Step 1: Bending and forming of the cooling pipe, bending a whole pure copper pipe into the cooling pipe, the liquid inlet pipe and the liquid outlet pipe by hot extrusion;

Step 2: Casting of the hot surface cooling layer, adding high temperature resistant, small particle size and good fluidity filling material to the bent cooling pipe, and then placing the cooling pipe in the base model of the cooling device , and fix the cooling pipe by the fixing card, and then pour high-purity copper water into the base model of the cooling device;

Step 3: After the hot surface cooling layer is cast, blow out the filling material in the cooling pipe;

Step 4: groove processing, processing the first transverse clamping protrusion and the second transverse clamping protrusion on the hot surface cooling layer after casting;

Step 5: For the processing of the cold surface protective layer, the stainless steel material that meets the requirements is selected, and the surface thereof is processed by mechanical processing to make the second transverse groove, the liquid inlet through hole and the liquid inlet hole that meet the requirements. the liquid outlet through hole;

Step 6: Fix the cast-molded hot surface cooling layer and the cold surface protective layer through the second lateral clipping protrusions and the second lateral clipping recesses, and use fastening screws for bolting.

Those skilled in the art can understand that the above-mentioned high-efficiency smelting reduction circulating cooling equipment in the present application at least has the following beneficial effects:

1. A cooling device is arranged between the furnace shell and the refractory layer, and the cooling device is set to a layered structure, including a hot surface cooling layer and a cold surface protective layer, so that the hot surface cooling layer and the refractory layer fit together, cooling The surface protective layer and the refractory layer sandwich the hot surface cooling layer. By arranging the cooling layer of the hot surface to have cooling pipes in the first metal shell, and the cooling pipes pass through the first metal shell to form liquid inlet pipes and liquid outlet pipes, the cooling liquid can flow along the cooling pipes in the hot surface cooling layer , in order to absorb the heat of the refractory layer and reduce the temperature of the refractory layer, so that a stable slag-iron solidified layer can be formed on the surface of the refractory layer, and the slag-iron solidified layer can protect the refractory layer in the transition zone and avoid serious corrosion and peeling of the refractory layer. phenomenon occurs.

By setting the cold surface protective layer, and setting the liquid inlet through hole and the liquid outlet through hole on the cold surface protective layer, the liquid inlet pipe passes through the liquid inlet through hole, and the liquid outlet pipe passes through the liquid outlet through hole, which is convenient for the cooling liquid to pass through. Inflow and outflow; and, by arranging the cold surface protective layer between the hot surface cooling layer and the furnace shell, the cold surface protective layer can prevent the temperature of the thermal surface cooling layer from being transferred to the furnace shell, so as to prevent the furnace shell from heating up continuously.

2. By setting the cooling pipe to include a first cooling pipe and a second cooling pipe, the centerlines of the first cooling pipe and the second cooling pipe are in the same plane, which is beneficial to compress the thickness of the cooling layer on the hot surface. In addition, the first cooling pipe and the second cooling pipe respectively extend inside the first metal shell and extend back through U-shaped bending, so as to form a serpentine arrangement, so that the cooling pipe has a longer length inside the cooling layer of the hot surface. Extend the length to improve the cooling efficiency of the cooling layer on the hot surface. In addition, the cooling pipes are arranged in a serpentine shape inside the cooling layer of the hot surface, which can increase the coverage area of the cooling pipes on the working surface of the cooling layer of the hot surface, and avoid the high temperature rise of the part of the cooling layer of the hot surface that is not covered by the cooling pipes. The phenomenon of uneven temperature distribution in the cooling layer of the hot surface.

3. By passing the first liquid inlet pipe of the first cooling pipe and the second liquid inlet pipe of the second cooling pipe together through the liquid inlet through holes on the cold surface protective layer, the liquid inlet through holes can make the first liquid inlet pipe The pipe and the second liquid inlet pipe are included and finally pass out of the furnace shell through the protective steel pipe. Similarly, the liquid outlet through hole can include the first liquid outlet pipe and the second liquid outlet pipe, which can reduce the number of openings on the furnace shell and ensure that the furnace shell has sufficient strength.

4. By casting the first metal shell with pure copper or copper alloy, the first metal shell has a good heat conduction effect, which can better promote the heat exchange between the cooling pipe and the refractory layer, and accelerate the cooling of the refractory layer. speed. By setting the thickness of the first metal shell to 80-100 mm, the first metal shell is made lighter and thinner, the material consumption is reduced on the basis of ensuring the strength, and the production cost is reduced. Similarly, the second metal shell is made of stainless steel as a whole, and the thickness of the second metal shell is 30-50mm, which can reduce the production cost.

5. By arranging protective steel pipes in the liquid inlet through holes and liquid outlet through holes of the cold surface protective layer, and extending the protective steel pipes along the axial direction of the liquid inlet through holes and the liquid outlet through holes until they pass through the furnace shell, so that the hot surface When the cooling layer and the cold surface protection layer are installed, the liquid inlet pipe of the hot surface cooling layer is inserted into the liquid inlet through hole of the cold surface protection layer, and the liquid outlet pipe of the hot surface cooling layer is inserted into the outlet of the cold surface protection layer. liquid through hole. With the above arrangement, when there is slight slippage between the cooling layer on the hot surface and the protective layer on the cold surface, the protective steel pipe will first bear the shear force to protect the liquid inlet pipe and the liquid outlet pipe from the shear force, improving the device service life.

6. The side where the cooling layer on the hot surface is attached to the refractory layer and the protective layer on the cold surface is provided with a transverse clamping protrusion, and the protective layer on the cold surface is provided with a transverse clamping groove, so that there is no heat between the cooling layer on the hot surface and the refractory layer. The surface cooling layer and the cold surface protection layer are both fixed by means of transverse clamping protrusions and transverse clamping grooves. Avoid the phenomenon of longitudinal slip between the cooling layer of the hot surface and the refractory layer, and between the cooling layer of the hot surface and the protective layer of the cold surface, which will cause the positional deviation of the cooling device between the furnace shell and the refractory layer, which will affect the cooling effect of the cooling device. .

7. By setting the second lateral clipping protrusion to have an angle of 5°-10° inclined downward relative to the horizontal plane, and setting the second lateral clipping depression matched with the second lateral clipping projection to have an inclination relative to the horizontal plane. The upward angle of 5°-10° makes the inclination angle of the second transverse snap protrusion better support the cooling layer on the hot surface, better prevent the high temperature deformation of the cooling layer on the hot surface, and improve the overall strength of the cooling device. Extend the life of the cooling unit.

Description of drawings

Embodiments of the present application are described below with reference to the accompanying drawings, in which:

Fig. 1 is the overall effect diagram of the smelting reduction furnace with cooling device in the transition zone in an embodiment of the present application;

2 is a cross-sectional view of a transition zone of a smelting reduction furnace with a cooling device in an embodiment of the present application;

3 is an enlarged view of an elastic abutting member in an embodiment of the present application;

FIG. 4 is a schematic diagram of the internal structure of the hot surface cooling layer in an embodiment of the present application;

FIG. 5 is a schematic diagram of a cold surface protective layer in an embodiment of the present application.

List of reference numbers:

100. Furnace shell;

200, the refractory layer; 210, the first transverse groove;

300, cooling device; 310, hot surface cooling layer; 311, first metal shell; 312, cooling pipe; 3121, first cooling pipe; 3122, second cooling pipe; 313, liquid inlet pipe; 314, liquid outlet pipe 315, bolt through hole; 316, first lateral clipping protrusion; 317, second lateral clipping projection; 320, cold surface protection layer; 321, second metal shell; 322, liquid inlet through hole; 323, liquid outlet through Hole; 324, bolt through hole; 325, protective steel pipe; 326, second transverse recess; 327, arc convex;

410, main circulation pipeline; 411, liquid supply branch pipe; 412, first valve body; 413, liquid return branch pipe; 414, second valve body; 420, auxiliary circulation pipeline; 421, third valve body;

500, thermal insulation layer;

600, elastic piece; 610, screw rod; 620, elastic abutting piece; 630, adjusting nut; 640, slider; 650, spring; 660, gas sealing cover.

Implementation

It should be understood by those skilled in the art that the embodiments described below are only preferred embodiments of the present application, and the preferred embodiments are intended to explain the technical principles of the present application, but are not intended to limit the protection scope of the present application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall still fall within the protection scope of this application.

It should be noted that in the description of this application, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", " Terms indicating a direction or a positional relationship such as "inside" and "outer" are based on the direction or positional relationship shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, in order to The specific orientation configuration and operation are therefore not to be construed as limitations of the present application. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In addition, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, or a It is a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can also be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

As shown in FIG. 1 and FIG. 2 , the smelting reduction furnace with the cooling device 300 in the transition zone includes a furnace shell 100 and a refractory layer 200 arranged in the furnace shell. The device 300 is arranged in a layered structure, including a hot surface cooling layer 310 and a cold surface protective layer 320, the hot surface cooling layer 310 is attached to the refractory layer 200, and the hot surface cooling layer 310 includes a first metal shell 311 and a A cooling pipe 312 inside the metal shell 311, the cooling pipe 312 penetrates out of the first metal shell 311 and extends to form a liquid inlet pipe 313 and a liquid outlet pipe 314. As an optional embodiment, the cooling pipe and the liquid inlet pipe 313 and the liquid outlet pipe 314 are made of the same pipeline, which can avoid the problem of cracking and water leakage at the welding position of the cooling pipe 312, the liquid inlet pipe 313 and the liquid outlet pipe 314 due to the low strength.

The cold surface protective layer 320 is attached to the hot surface cooling layer 310 and holds the hot surface cooling layer 310 together with the refractory layer 200 . The through hole 322 and the liquid outlet through hole 323. When the hot surface cooling layer 310 and the cold surface protective layer 320 are installed, the liquid inlet through hole 322 is matched with the liquid inlet pipe 313, so that the liquid inlet pipe 313 is inserted into the liquid inlet through hole. Inside 322, the liquid outlet through hole 323 is matched with the liquid outlet pipe 314, so that the liquid outlet pipe 314 is inserted into the inside of the liquid outlet through hole 323, and the liquid inlet pipe 313 and the liquid outlet pipe 314 are connected with the external cooling liquid circulation system.

Those skilled in the art can understand that when the cooling device 300 is in operation, the cooling liquid flows into the cooling pipe 312 through the liquid inlet pipe 313 , flows in a predetermined direction under the restriction of the cooling pipe 312 , and finally flows out through the liquid outlet pipe 314 In the above process, the cooling liquid can absorb the heat transferred from the refractory layer 200 to the hot surface cooling layer 310 and take the heat away, so that the hot surface cooling layer 310 and the refractory layer 200 are maintained in a relatively low temperature range. Therefore, the present application can reduce the temperature of the refractory layer 200, so that a stable slag-iron solidified layer can be formed on the surface of the refractory layer 200, and the slag-iron solidified layer can protect the refractory layer 200 in the transition zone to avoid serious corrosion and peeling of the refractory layer 200. phenomenon occurs.

Continuing to refer to FIG. 1 , the cooling device 300 is connected with a cooling liquid circulation system disposed on the periphery of the furnace shell. The cooling liquid circulation system includes a main circulation pipeline 410 , and the main circulation pipeline 410 communicates with the liquid inlet through hole 322 through the liquid supply branch pipe 411 The main circulation pipeline 410 communicates with the liquid outlet through hole 323 through the liquid return branch pipe 413 , the liquid supply branch pipe 411 is provided with a first valve body 412 , and the liquid return branch pipe 413 is provided with a second valve body 414 .

The cooling liquid circulation system also includes an auxiliary circulation pipeline 420, which is in communication with the liquid supply branch pipe 411 and the liquid return branch pipe 413 at the same time. The auxiliary circulation pipeline 420 is provided with a third valve body 421; the first valve body 412 and the second valve body 414 can be communicated with the main circulation line 410 at the same time; or, the first valve body 412 and the second valve body 414 can be communicated with the auxiliary circulation line 420 at the same time.

Those skilled in the art can understand that, by connecting the cooling device 300 with the cooling liquid circulation system, and dividing the cooling liquid circulation system into the main circulation pipeline 410 and the auxiliary circulation pipeline 420, when the cooling device 300 operates normally, The first valve body 412 is in communication with the second valve body 414 and the main circulation pipeline 410, so that the cooling liquid in the main circulation pipeline 410 can flow into the liquid inlet through hole 322 through the liquid supply branch pipe 411, and then pass through the liquid outlet pipe. The hole 323 flows through the liquid return branch pipe 413 and flows back to the main circulation pipe 410 for cooling, so that the cooling liquid in the cooling device 300 can be cooled through the main circulation pipe 410, so that the cooling liquid in the cooling device 300 can be maintained at a lower temperature , to improve the cooling effect of the cooling device 300 .

Furthermore, by setting the auxiliary circulation pipeline 420, when a cooling liquid leak occurs in a certain cooling device 300, the first valve body 412 and the second valve body 414 immediately close the connection with the main circulation pipeline 410 and conduct the connection with the main circulation pipeline 410. The auxiliary circulation line 420 is connected, and the third valve body 421 is opened, so that the cooling liquid in the auxiliary circulation line 420 flows into the cooling device 300, so as to avoid the pressure drop caused by the excessive loss of the cooling liquid in the main circulation line 410, thereby causing the failure to The phenomenon that sufficient cooling liquid is provided for the rest of the cooling device 300 . The auxiliary circulation line 420 can independently provide cooling liquid for the cooling device 300 with leakage, so as to ensure that the cooling device 300 with leakage is not burned out.

As shown in FIG. 4 , as a preferred embodiment, the cooling pipe 312 extends from the inside of the first metal shell 311 to one end of the metal shell 311 until reaching the side of the first metal shell 311 through U-bend Back-extending, when the cooling pipe 312 reaches the other side of the first metal shell 311, it is extended again through U-shaped bending, so as to form a serpentine arrangement, so that the cooling pipe 312 has a longer length inside the hot-face cooling layer 310. Extending the length improves the cooling efficiency of the hot surface cooling layer 310 . In addition, the cooling pipes 312 are arranged in a serpentine shape inside the cooling layer 310 on the hot surface, which can increase the coverage area of the cooling pipes 312 on the working surface of the cooling layer 310 on the hot surface, and avoid the occurrence of the part of the cooling layer 310 not covered by the cooling pipes 312 on the hot surface. The high temperature rise causes the phenomenon that the temperature distribution of the hot surface cooling layer 310 is not uniform.

Wherein, the extending direction of the cooling pipes 312 in the first metal shell 311 may be extended along the axial direction of the smelting reduction furnace, or may be extended and arranged along the circumferential direction of the smelting reduction furnace.

Continuing to refer to FIG. 4 , the cooling duct 312 has a first cooling duct 3121 and a second cooling duct 3122 . In the present application, by arranging two cooling pipes 312 in the first metal shell 311 , when one of the cooling pipes 312 fails, the other cooling pipe 312 can also perform cooling and cooling, thereby improving the cooling performance of the cooling device 300 reliability. In addition, the centerlines of the first cooling pipe 3121 and the second cooling pipe 3122 are in the same plane, so that the distances between the two cooling pipes 312 and the refractory layer 200 are the same and have the same cooling effect.

Further, by arranging the centerlines of the first cooling pipe 3121 and the second cooling pipe 3122 in the same plane, the hot surface cooling layer 310 can adopt a thinner and lighter structure. For example, in this embodiment, the thickness of the hot surface cooling layer 310 is 80-100 mm, and it is cast from pure copper or copper alloy, which can reduce the casting materials of the hot surface cooling layer 310 and reduce the thickness of the hot surface cooling layer 310 Cost of production. Similarly, the cold surface protective layer 320 fixed with the hot surface cooling layer 310 also adopts a light and thin structure. to make.

Those skilled in the art can understand that the first cooling pipe 3121 and the second cooling pipe 3122 disposed in the first metal shell 311 have a liquid inlet pipe 313 and a liquid outlet pipe 314 respectively. As a preferred embodiment, The liquid inlet pipe 313 of the first cooling pipe 3121 and the liquid inlet pipe 313 of the second cooling pipe 3122 are arranged in parallel, and simultaneously extend to the outside of the furnace shell 100 through the liquid inlet through hole 322 of the cold surface protection layer 320 . At the same time, the liquid outlet pipe of the first cooling pipe 3121 and the liquid outlet pipe 314 of the second cooling pipe 3122 are arranged side by side, and simultaneously extend to the outside of the furnace shell 100 through the liquid outlet through hole 323 of the cold surface protection layer 320 .

4, the first cooling pipe 3121 and the second cooling pipe 3122 are arranged at intervals, wherein the distance between the center line of the first cooling pipe 3121 and the center line of the second cooling pipe 3122 is preferably 50-200mm. The first cooling duct 3121 and the second cooling duct 3122 are spaced apart, so that the cooling duct 312 can evenly spread over the entire working surface of the cooling layer 310 on the hot surface, so as to avoid a higher temperature rise in the part of the cooling layer 310 on the hot surface that is not covered by the cooling duct 312 As a result, the temperature distribution of the hot surface cooling layer 310 is not uniform.

As shown in FIG. 2 , the side where the hot surface cooling layer 310 is attached to the refractory layer 200 and the cold surface protective layer 320 is provided with a plurality of first lateral locking protrusions 316 , and the cold surface protective layer 320 is provided with a plurality of first lateral locking grooves 210, between the hot surface cooling layer 310 and the refractory layer 200, and between the hot surface cooling layer 310 and the cold surface protective layer 320 are fixed by the first lateral clamping protrusions 316 and the first transverse clamping concave 210 to avoid the hot surface cooling layer Longitudinal slip occurs between 310 and the refractory layer 200 and between the hot surface cooling layer 310 and the cold surface protective layer 320, resulting in the positional deviation of the cooling device 300 between the furnace shell 100 and the refractory layer 200, affecting the cooling device 300 cooling effect.

As a preferred embodiment, the first lateral locking protrusions 316 extend from one side surface of the hot surface cooling layer 310 to the other side surface of the hot surface cooling layer 310 in the horizontal direction. Correspondingly, the first lateral locking grooves 210 are located at The horizontal direction penetrates from one side surface of the cold surface protective layer 320 to the other side surface of the cold surface protective layer 320 . During the installation process between the hot surface cooling layer 310 and the cold surface protective layer 320 , it is only necessary to align the first lateral locking protrusions 316 of the hot surface cooling layer 310 with the first lateral locking grooves 210 of the cooling protective layer 320 . Then, push the first lateral locking protrusion 316 into the first lateral locking groove 210 .

It should be noted that the present application adopts the first lateral locking protrusions 316 and the first lateral locking grooves 210 to install and position the hot surface cooling layer 310 and the cold surface protective layer 320, and does not install the first lateral locking protrusions 316 and the first lateral locking grooves The specific shape of the 210 is limited, which can adopt any feasible implementation manner. For example, the cross-sections of the first lateral latching protrusion 316 and the first lateral latching recess 210 are set to be rectangular, tapered, and so on.

Continuing to refer to FIG. 2 , the side of the hot surface cooling layer 310 that is abutted with the cold surface protective layer 320 is further provided with a second lateral snap protrusion 317 . Accordingly, the cold surface protective layer 320 is in contact with the hot surface cooling layer 310 . A second lateral locking concave 326 is provided on the side that is closed. The second lateral latching protrusion 317 has a downward inclination angle relative to the horizontal plane, and the inclination angle is 5°-10°, and the second lateral latching groove 326 has an upward inclination angle relative to the horizontal plane, and the inclination angle is the same as that of the second lateral latching protrusion. The inclination angle of 317 is the same.

Those skilled in the art can understand that, through the above-mentioned setting method, the inclination angle of the second lateral clamping protrusions 317 can better support the hot surface cooling layer 310 and better prevent the hot surface cooling layer 310 from being deformed at high temperature , to improve the overall strength of the cooling device 300 and prolong the service life of the cooling device 300 .

4 and 5, the cold surface protection layer 3 is provided with a number of bolt through holes 324, correspondingly, the hot surface cooling layer 310 is provided with bolt through holes 315 at corresponding positions, so that the cold surface protection layer 320 and the hot surface are provided with bolt through holes 315. The cooling layer 310 is bolted through the bolt through holes 324 . In the present application, bolt through holes 324 are provided in the cold surface protection layer 320, and the bolts are fixedly connected to the hot surface cooling layer 310 to avoid horizontal slippage between the hot surface cooling layer 310 and the cold surface protection layer 320. The positioning accuracy is inaccurate.

As shown in FIG. 5 , protective steel pipes 325 are arranged in the liquid inlet through holes 322 and the liquid outlet through holes 323 of the cold surface protective layer 320 , and the protection steel pipes 325 extend along the axial direction of the liquid inlet through holes 322 and the liquid outlet through holes 323 until Passing out of the furnace shell 100, the diameter of the protective steel pipe 325 is slightly larger than the diameter of the liquid inlet pipe 313 and the liquid outlet pipe 314, so that when the hot surface cooling layer 310 and the cold surface protective layer 320 are installed, the liquid inlet of the hot surface cooling layer 310 The pipe 313 is inserted into the liquid inlet through hole 322 of the cold surface protection layer 320 , and the liquid outlet pipe 314 of the hot surface cooling layer 310 is inserted into the liquid outlet through hole 323 of the cold surface protection layer 320 . Through the above arrangement, when a slight slip occurs between the hot surface cooling layer 310 and the cold surface protective layer 320, the protective steel pipe 325 will first bear the shear force, and the liquid inlet pipe 313 and the liquid outlet pipe 314 will be protected from the shear force. influence and increase the service life of the device.

As shown in FIG. 5 , the top of the cold surface protective layer 320 is provided with an arc-shaped protrusion 327 , and the side of the melting reduction furnace that is in contact with the top of the cold surface protective layer 320 is provided with an arc-shaped groove, and the cold surface protective layer 320 is provided with an arc-shaped groove. It is fixed with the smelting reduction furnace through the snap connection of the arc-shaped protrusion 327 and the arc-shaped groove. Those skilled in the art can understand that the cold surface protective layer 320 and the smelting reduction furnace are clamped and fixed by the arc-shaped protrusions 327 and the arc-shaped grooves, which can prevent the cold surface protective layer 320 from being in the radial direction relative to the smelting reduction furnace. The sliding on the upper part ensures the fixed tightness between the cooling device 300 and the smelting reduction furnace.

As shown in FIG. 2 , a heat insulating layer 500 is further arranged between the cooling device 300 and the furnace shell 100 , and both sides of the heat insulating layer 500 are respectively attached to the cold surface protection layer 320 and the furnace shell 100 , and the heat insulating layer 500 can avoid The heat of the smelting reduction furnace is radiated to the furnace shell 100 . The furnace shell 100 and the cooling device 300 are installed and fixed by an elastic member 600. The elastic member 600 includes a screw 610 that penetrates the furnace shell 100 and is connected to the cold surface protective layer 320, and an elastic abutting member 620 that abuts against the top of the screw 610; The adapter 620 provides axial pressure to the screw 610 and allows the screw 610 to move in the axial direction. In the present application, the elastic abutting member 620 is provided so that the elastic abutting member 620 can continuously provide pressure to the screw 610 , so that the screw 610 tightly connects the thermal insulation layer 500 and the cooling device 300 . When the cooling device 300 and the heat insulating layer 500 are heated and slightly expand, the screw 610 can push the elastic abutting member 620, so that the elastic abutting member 620 has a moving space in the axial direction, and will not be excessively tightened and cracked .

As a preferred embodiment, the elastic abutting member includes a gas sealing cover 660, an adjusting nut 630 penetrating the gas sealing cover 660, a slider 640 and a spring 650 disposed in the gas sealing cover 660; one end of the spring 650 and the screw 610 To counteract, the other end of the spring 650 abuts against the adjusting nut 630 through the slider 640 , and the adjusting nut 630 can be tightened or loosened to change the pressure applied to the spring 650 .

Through the description of the above structure, the present application also provides a preparation method for a cooling device in a transition zone of a smelting reduction furnace, which specifically includes the following steps:

Step 1: bending and forming the cooling pipe 312, bending the whole pure copper pipe into the cooling pipe 312, the liquid inlet pipe 313 and the liquid outlet pipe 314 by hot extrusion;

Step 2: Casting of the hot surface cooling layer 310, adding high temperature resistant, small particle size and good fluidity filling material to the bent cooling pipe 312, and then placing the cooling pipe 312 in the base model of the cooling device 300 , and fix the cooling pipe 312 through the fixing card, and then pour high-purity copper water into the base model of the cooling device 300;

Step 3: after the casting of the hot surface cooling layer 310 is completed, the filling material in the cooling pipe 312 is blown out;

Step 4: groove processing, processing the first transverse clamping protrusion 316 and the second transverse clamping protrusion 317 on the hot surface cooling layer 310 after casting;

Step 5: For the processing of the cold surface protective layer 320, the stainless steel material that meets the requirements is selected, and the surface thereof is processed by mechanical processing to make the second transverse clamping recess 317, the liquid inlet through hole 322 and the outlet that meet the requirements. liquid through hole 323;

Step 6: Fix the cast-molded hot surface cooling layer 310 and the cold surface protective layer 320 by the second lateral locking protrusions 317 and the second lateral locking grooves 326, and use fastening screws for bolting.

Through the above description of the structure and manufacturing method of the cooling device for the transition zone of the smelting reduction furnace, those skilled in the art can understand that by installing the fabricated cooling device 300 in the transition zone of the smelting reduction furnace as a whole, the cooling device The cooling liquid in 300 can flow along the cooling pipe 312 in the hot surface cooling layer 310 to absorb the heat of the refractory layer 200 and reduce the temperature of the refractory layer 200, so that a stable slag iron solidification layer can be formed on the surface of the refractory layer 200. The solidified layer protects the refractory layer in the transition zone, so as to avoid serious corrosion and peeling of the refractory layer 200, and prolong the service life of the smelting reduction furnace.

So far, the technical solutions of the present application have been described with reference to the foregoing embodiments, however, those skilled in the art will readily understand that the protection scope of the present application is not limited to these specific embodiments. Without departing from the technical principles of the present application, those skilled in the art can split and combine the technical solutions in the above-mentioned embodiments, and can also make equivalent changes or replacements to the relevant technical features. Any modification, equivalent replacement, improvement, etc. made within the concept and/or technical principle will fall within the protection scope of the present application.

Claims

A high-efficiency smelting-reduction circulating cooling device, characterized in that the cooling device is arranged in a layered structure, including a hot-face cooling layer and a cold-face protective layer, the hot-face cooling layer and the refractory layer are attached, and the heat The surface cooling layer includes a first metal shell and a cooling pipe arranged inside the first metal shell, the cooling pipe penetrates the first metal shell and extends to form a liquid inlet pipe and a liquid outlet pipe;

The cold surface protection layer is attached to the hot surface cooling layer and clamps the hot surface cooling layer together with the refractory layer. The cold surface protection layer includes a second metal shell and penetrates through the second metal layer. The liquid inlet through hole and the liquid outlet through hole of the casing, the liquid inlet pipe passes through the liquid inlet through hole, and the liquid outlet pipe passes through the liquid outlet through hole.
The high-efficiency smelting-reduction circulating cooling device according to claim 1, wherein the cooling pipe comprises a first cooling pipe and a second cooling pipe, and the centerlines of the first cooling pipe and the second cooling pipe are at in the same plane;

The first cooling pipe and the second cooling pipe respectively extend inside the first metal shell, and are extended back through a U-shaped bend, so as to form a serpentine arrangement in a reciprocating manner.
The high-efficiency smelting reduction circulating cooling device according to claim 2, wherein the first cooling pipe has a first liquid inlet pipe and a first liquid outlet pipe, and the second cooling pipe has a second liquid inlet pipe and a first liquid outlet pipe. The second liquid outlet pipe;

The first liquid inlet pipe and the second liquid inlet pipe jointly pass through the liquid inlet through hole, and the first liquid outlet pipe and the second liquid outlet pipe jointly pass through the liquid outlet through hole.
The high-efficiency smelting reduction circulating cooling device according to claim 3, wherein the first metal shell is integrally cast with pure copper or copper alloy, and the thickness of the first metal shell is 80-100mm ;

The second metal shell is made of stainless steel as a whole, and the thickness of the second metal shell is 30-50mm.
The high-efficiency smelting-reduction circulating cooling equipment according to claim 3, wherein a protective steel pipe is provided in the liquid inlet through hole and the liquid outlet through hole of the cold surface protective layer, and one end of the protective steel pipe is It is welded and fixed with the liquid inlet through hole and the liquid outlet through hole; the other end of the protective steel pipe extends along the axial direction of the liquid inlet through hole and the liquid outlet through hole until it passes through the furnace of the smelting reduction furnace The shell is welded and fixed with the furnace shell.
The high-efficiency smelting-reduction circulating cooling device according to claim 1, wherein the hot-face cooling layer is provided with a first lateral clip on the side that is in contact with the refractory layer, and the hot-face cooling layer is A second transverse snap protrusion is arranged on the side that is in contact with the cold surface protective layer;

The cold surface protective layer is provided with a second lateral clipping recess on the side that is in contact with the hot surface cooling layer, and the second lateral clipping recess is clipped and fixed with the second lateral clipping projection.
The high-efficiency smelting-reduction circulating cooling device according to claim 6, wherein the first transverse clamping protrusions are evenly distributed on the hot surface cooling layer, and the cross-section of the first transverse clamping protrusions is a rectangle or a dovetail groove;

The second lateral clipping protrusion has a downward inclination angle relative to the horizontal plane, and the inclination angle is 5°-10°; the lateral clipping concave has an upward inclination angle relative to the horizontal plane, and the inclination angle is 5° °-10°.
The high-efficiency smelting reduction circulating cooling device according to claim 7, wherein the top of the cold surface protective layer is provided with an arc-shaped protrusion, and the smelting reduction furnace is in contact with the top of the cold surface protective layer An arc-shaped groove is arranged on one side of the joint;

The cold surface protective layer and the smelting reduction furnace are fixed by the clamping connection of the arc-shaped protrusion and the arc-shaped groove.
The high-efficiency smelting-reduction circulating cooling equipment according to claim 1, wherein the furnace shell and the cooling device are installed and fixed by an elastic member, and the elastic member includes a structure that penetrates through the furnace shell and is connected to the cold surface. a screw connected to the protective layer, and an elastic abutting piece abutting against the top of the screw;

The elastic abutment provides axial pressure to the screw and allows the screw to move in the axial direction.
A kind of high-efficiency smelting reduction circulating cooling equipment according to claim 1, is characterized in that: the preparation method of described cooling device comprises the following steps:

Step 1: Bending and forming of the cooling pipe, bending a whole pure copper pipe into the cooling pipe, the liquid inlet pipe and the liquid outlet pipe by hot extrusion;

Step 2: Casting of the hot surface cooling layer, adding high temperature resistant, small particle size and good fluidity filling material to the bent cooling pipe, and then placing the cooling pipe in the base model of the cooling device , and fix the cooling pipe by the fixing card, and then pour high-purity copper water into the base model of the cooling device;

Step 3: After the hot surface cooling layer is cast, blow out the filling material in the cooling pipe;

Step 4: groove processing, processing the first transverse clamping protrusion and the second transverse clamping protrusion on the hot surface cooling layer after casting;

Step 5: For the processing of the cold surface protective layer, the stainless steel material that meets the requirements is selected, and the surface thereof is processed by mechanical processing to make the second transverse groove, the liquid inlet through hole and the liquid inlet hole that meet the requirements. the liquid outlet through hole;

Step 6: Fix the cast-molded hot surface cooling layer and the cold surface protective layer through the second lateral clipping protrusions and the second lateral clipping recesses, and use fastening screws for bolting.