A ladle slow cooling device

Abstract

The utility model discloses a kind of ladle slow cooling device, including the W type ladle structure for supporting ladle body, the bottom of the W type ladle structure forms conical cavity, the top of the W type ladle structure is equipped with annular flow guide receiving tray, the outside of the W type ladle structure is equipped with multiple V type tubular cavity for cooling medium to pass through, the bottom of the annular flow guide receiving tray is connected with V type tubular cavity, the inside of the conical cavity is equipped with air jet pipe;When air cooling, by controlling air jet pipe and spraying gas inside conical cavity, gas passes through V type tubular cavity and forms heat-insulating gas layer outside W type ladle structure;When water cooling, liquid cooling medium passes through V type tubular cavity and is discharged from conical cavity in concentration.The utility model makes the overall temperature of ladle when slow cooling more uniform, reduces temperature drop rate, accelerates ladle cooling when rapid cooling, reduces cooling time, saves the amount of use of cooling water, reduces the probability of internal liquid state when pouring, improves industrial production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of metal smelting technology, and in particular to a slag bag slow cooling device. Background Technology

[0002] Currently, the smelting slag produced by flash smelting furnaces in copper smelting processes is treated with a slow cooling beneficiation process to improve the system recovery rate. The hot slag needs to be transported to a slag slow cooling field for slow cooling. Due to the growth properties of copper in the smelting slag, the high-temperature smelting slag needs to be cooled as slowly as possible in the early stage to ensure that the copper grains grow fully. After a certain period of slow cooling, rapid cooling is then carried out to ensure the flotation efficiency of copper recovery in the later stage.

[0003] Domestic smelters typically cool high-temperature copper smelting slag by first allowing it to cool naturally and then subjecting it to rapid water bath cooling. The smelting slag in the slag ladle has a long cooling time, and during this process, it gradually solidifies from the outside in. Once the outer layer solidifies to a certain thickness, it acts as an insulator for the slag core. This causes a sharp decrease in the heat exchange capacity of the slag core during both air and water cooling. The cooling rate of the smelting slag within the ladle is uneven, and liquid slag cores may still remain when the ladle is poured. If moisture is present at the slag receiving point and comes into direct contact with the high-temperature liquid slag core, there is a risk of expansion and explosion, posing a significant safety hazard.

[0004] The published utility model patent (publication number CN202322138476.9) describes a method of setting multiple independent small cooling chambers on the outer wall of the slag bag body, thereby increasing the water-cooled contact area of ​​the slag bag and accelerating the cooling process. However, the area of ​​the cooling chambers only covers the side of the slag bag body, and the cooling of the bottom of the slag bag and the slag core is still uneven, and liquid slag core may still exist. In addition, many valves and other structures are set above and below the cooling chamber, which makes the control complex and the failure rate high. In particular, the service life is greatly reduced under long-term high temperature environment, which increases the manufacturing cost. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a slag bag slow cooling device. This device can solve the problem of excessive temperature difference between the slag core and the slag edge, making the overall temperature drop of the slag bag more uniform during slow cooling, reducing the temperature drop rate during the entire slow cooling stage, accelerating the cooling of the slag bag during rapid cooling, reducing the cooling time of the smelting slag, saving the amount of cooling water used, reducing the probability of liquid inside the slag core during pouring, and improving industrial production efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A slow cooling device for slag bags includes a W-shaped slag bag structure for supporting the slag bag body. The bottom of the W-shaped slag bag structure forms a conical cavity. The device is characterized by having an annular flow guide plate at the top of the W-shaped slag bag structure, and multiple V-shaped tubular cavities on the outer side of the W-shaped slag bag structure for the cooling medium to pass through. The multiple V-shaped tubular cavities are circumferentially distributed around the W-shaped slag bag structure. The bottom of the annular flow guide plate is connected to the V-shaped tubular cavities. A jet pipe is installed inside the conical cavity. During air cooling, gas is sprayed into the conical cavity through the jet pipe, and the gas passes through the V-shaped tubular cavities to form a heat-insulating gas layer on the outer side of the W-shaped slag bag structure. During water cooling, the liquid cooling medium absorbs heat, flows downward through the V-shaped tubular cavities, and is finally discharged from the conical cavity.

[0008] Preferably, the V-shaped tubular cavity is composed of a tubular cavity one and a tubular cavity two, wherein the tubular cavity one is closely attached to the outer side of the W-shaped slag bag structure, and the tubular cavity two is closely attached to the inner wall of the conical cavity.

[0009] Preferably, the horizontal distance between the jet pipe and the tubular cavity two is less than the diameter of the tubular cavity two, and the height of the jet pipe is greater than the height of the tubular cavity two.

[0010] Preferably, the tubular cavity is in a flat state.

[0011] Preferably, the W-shaped slag bag structure is provided with a support base at the bottom, and the jet pipe is connected to the support base.

[0012] Preferably, the upper end of the jet pipe is provided with a conical structure, which can move up and down along the vertical axis.

[0013] Compared with the prior art, the advantages of this utility model are as follows:

[0014] 1. By setting conical cavities, V-shaped tubular cavities and jet pipes, the cooling area is increased, thereby accelerating the cooling of the slag core and reducing the cooling time of the smelting slag.

[0015] 2. During the slow cooling process, the heat obtained by the slag core heat exchange is used through the V-shaped tube cavity to keep the slag bag warm as a whole, which reduces the temperature change rate during the slow cooling process, makes the overall cooling speed of the slag bag more uniform, and makes the copper grains in the smelting slag grow more completely.

[0016] 3. During the water cooling process, the overflowing water is guided by the V-shaped tube cavity, which allows the cooling water to fully contact the surface of the slag bag, accelerates the cooling of the slag bag, and reduces the waste of water resources. At the same time, the overall structure is compact and can be adapted to different cooling stages of the slag bag. It does not require too many valves for flow control and is durable. Attached Figure Description

[0017] Figure 1This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a front view structural diagram of the present invention.

[0019] Figure 3 This is a bottom view of the structure of this utility model.

[0020] Figure 4 This is a front view structural diagram of the support base of this utility model.

[0021] Figure 5 This is a three-dimensional structural diagram of the support base of this utility model.

[0022] Figure 6 This is a cross-sectional structural diagram of the present invention.

[0023] Figure 7 This is a schematic diagram of the three-dimensional structure of the jet pipe in one embodiment of the present invention.

[0024] In the figure: 1. W-shaped slag bag structure; 2. V-shaped tubular cavity; 21. Tubular cavity one; 22. Tubular cavity two; 3. Jet pipe; 31. Conical structure; 4. Annular guide plate; 5. Conical cavity; 6. Support base. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] See attached document Figure 1 -Appendix Figure 7 A slag slow cooling device is a specially designed smelting slag container made of ductile iron or heat-resistant cast iron. It has excellent resistance to rapid cooling and heating and can maintain stable performance under high temperature and rapid temperature changes.

[0028] The smelting slag container includes a slag bag structure with a vertical cross-section of W. The W-shaped slag bag structure 1 is used to hold the slag bag body. A conical cavity 5 is formed at the bottom of the smelting slag container. The W-shaped slag bag structure 1 is fitted with multiple V-shaped tubular cavities 2 close to the outer wall for physical flow guidance. The V-shaped tubular cavity 2 includes tubular cavity one 21 and tubular cavity two 22. The length of tubular cavity one 21 is greater than the length of tubular cavity two 22. Tubular cavity two 22 is close to the inner wall of the conical cavity 5. The bends of tubular cavity one 21 and tubular cavity two 22 are connected by connecting pipes. A vertical jet pipe 3 is also provided inside the conical cavity 5. By introducing high-pressure cold air, the jet pipe 3 can enhance the heat exchange of the smelting slag core.

[0029] To further ensure that the airflow in the jet pipe 3 can enter the V-shaped tubular cavity 2 for physical guidance through forced convection, the horizontal distance between the jet pipe 3 and the tubular cavity 22 is less than or equal to the diameter of the tubular cavity 22. This reduces the gap between the jet pipe 3 and the tubular cavity 22, allowing more gas to enter the V-shaped tubular cavity 2 for physical guidance. The height of the jet pipe 3 is higher than the height of the tubular cavity 22 within the conical cavity 5, to ensure that the cooling water flowing out of the tubular cavity 22 during the water-cooling stage does not affect the gas outlet of the jet pipe 3.

[0030] During operation, the slag container should be allowed to cool naturally after the slag bag is first added. After the internal cooling time is reached, the air jet pipe 3 inside the cavity is opened to introduce cold air to enhance heat exchange in the slag core. The cooling time of the slag can be adjusted by controlling the amount of air jet from the air jet pipe 3 according to the specific situation, thereby improving the efficiency and controllability of the operation.

[0031] The high-temperature gas generated by heat exchange through the slag core can be physically guided by the V-shaped tubular cavity 2 to form an insulating gas layer, reducing the temperature drop rate during the entire slow cooling stage and allowing copper grains in the smelting slag to grow fully. To enhance the gas insulation effect, multiple tubular cavities 21 can be set on the outer side to increase the insulation area by increasing the number of cavities. The outer tubular cavities 21 can also be set to a flat state with a larger cross-sectional size to increase the overall insulation area by increasing the insulation area of ​​a single tubular cavity 21. This improves the overall cooling uniformity of the smelting slag and reduces the situation of excessive temperature difference and inconsistent shape between the slag core and slag edge. Waste heat resources are recovered through heat exchangers to prepare low-pressure steam, hot water, and other waste heat resources, improving economic efficiency and reducing production costs.

[0032] When the slag core temperature reaches 1050℃ (the value may vary depending on the specific slag), the slag inside the entire slag ladle is completely solidified. After the slag ladle is completely solidified, it is rapidly cooled by means of a water bath. The top of the slag container is equipped with an annular flow guide plate 4, which is connected to the V-shaped tube cavity 2. After the slag is completely solidified, it is water-cooled using cooling water. The cooling water flowing out of the slag ladle surface is collected by the annular flow guide plate 4 and then heat-exchanged by the cooling water guided by the V-shaped tube cavity 2, which is close to the outer wall of the container, to accelerate the cooling of the slag ladle. At the same time, the cooling water is collected after heat exchange to reduce the waste of cooling water resources.

[0033] The bottom of the smelting slag container is equipped with a support base 6, and the jet pipe 3 is directly connected to the support base 6. The support base 6 is equipped with a forced circulation cooling system. The jet pipe 3 can be opened according to the slow cooling situation to make the cooling of the smelting slag controllable and accelerate the cooling time of the smelting slag. The support base 6 can also be used to collect and guide high-temperature gas and collect cooling water, thereby increasing economic benefits.

[0034] To further achieve better cooling performance, please refer to the attached document. Figure 7 An inverted conical structure 31 is added to the upper end of the jet pipe 3. When air is slowly cooled, the conical structure 31 moves down and presses against the tubular cavity 22 to reduce gas leakage, so that the replaced high-temperature gas can fully enter the tubular cavity 22, thereby achieving a better heat preservation effect. When water is cooled, the conical structure 31 moves up to allow the cooling water to be recovered by entering the bearing base 6.

[0035] In summary, when using this invention, the slag bag is first subjected to natural slow cooling. After a certain period of slow cooling, the cooling time of the smelting slag is adjusted by controlling the amount of cold air injected through the jet pipe 3. The high-temperature gas generated by heat exchange in the slag core is physically guided through the V-shaped tubular cavity 2 to form a heat-insulating gas layer, reducing the temperature drop rate during the entire slow cooling stage and allowing copper grains in the smelting slag to grow fully. This improves the overall cooling uniformity of the smelting slag and reduces the situation of excessive temperature difference and inconsistent morphology between the slag core and the slag edge. After slow cooling, water cooling is performed using a ring-shaped guide pipe. The tray 4 collects overflow water and guides cooling water through the V-shaped tubular cavity 2, which is close to the outer wall of the container, to accelerate the cooling of the slag bag. Through the above structural design, it can be adaptively adjusted according to different cooling stages of the slag bag, without the need for too many valves for flow control. It is durable, strengthens the core cooling heat exchange intensity, increases the slow cooling temperature, reduces the cooling time of the smelting slag, saves the amount of cooling water, reduces the probability of the slag core being liquid during dumping, and thus reduces the probability of smelting slag explosion during dumping, improving the safety of the operation and improving industrial production efficiency.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A slag bag slow cooling device, comprising a W-shaped slag bag structure (1) for supporting the slag bag body, characterized in that: The bottom of the W-shaped slag bag structure (1) forms a conical cavity (5), the top of the W-shaped slag bag structure (1) is provided with an annular flow guide plate (4), the outer side of the W-shaped slag bag structure (1) is provided with multiple V-shaped tubular cavities (2) for the cooling medium to pass through, the multiple V-shaped tubular cavities (2) are distributed around the W-shaped slag bag structure (1) circumferentially, the bottom of the annular flow guide plate (4) is connected to the V-shaped tubular cavity (2), and the conical cavity (5) is provided with a jet pipe (3). During air cooling, gas is sprayed into the conical cavity (5) by controlling the jet pipe (3). The gas passes through the V-shaped tube cavity (2) and forms a heat-insulating gas layer on the outside of the W-shaped slag bag structure (1). During water cooling, the liquid cooling medium absorbs heat and flows downward through the V-shaped tube cavity (2) and is finally discharged from the conical cavity (5).

2. The ladle gradual cooling device according to claim 1, characterized in that, The V-shaped tubular cavity (2) is composed of tubular cavity one (21) and tubular cavity two (22). The tubular cavity one (21) is closely attached to the outside of the W-shaped slag bag structure (1), and the tubular cavity two (22) is closely attached to the inner wall of the conical cavity (5).

3. The slag bag slow cooling device according to claim 2, characterized in that, The horizontal distance between the jet pipe (3) and the tubular cavity two (22) is less than the diameter of the tubular cavity two (22), and the height of the jet pipe (3) is higher than the height of the tubular cavity two (22).

4. The slag bag slow cooling device according to claim 3, characterized in that, The tubular cavity (21) is in a flat state.

5. The slag bag slow cooling device according to claim 1, characterized in that, The W-shaped slag bag structure (1) is provided with a support base (6) at the bottom, and the jet pipe (3) is connected to the support base (6).

6. A slag bag slow cooling device according to any one of claims 1-5, characterized in that, The upper end of the jet pipe (3) is provided with a conical structure (31), which can move up and down along the vertical axis.

Images