Closed slag recovery equipment for zinc pyrometallurgy

Abstract

The utility model relates to the technical field of slag recovery, in particular to closed slag recovery equipment for zinc pyrometallurgy. The furnace slag heat dissipation efficiency can be improved, furnace slag waste heat is fully utilized, and more energy conservation and environment protection are achieved; comprising a shell, a three-way feeding box installed on the shell and communicated with the interior of the shell, a heat exchanger, a crushing mechanism and a bearing material guide groove, a material collecting cavity and an installation cavity are formed in the shell, a vertical channel and an inclined channel communicated with the vertical channel are arranged in the three-way feeding box, the vertical channel is communicated with the material collecting cavity, and the inclined channel is communicated with the installation cavity. The heat exchanger is installed in the vertical channel, one end of the bearing material guide groove is located below the vertical channel, the other end of the bearing material guide groove extends downwards in an inclined mode towards the feeding position of the crushing mechanism, a material guide channel is installed at the bottom of the shell, and the bottom end of the material guide channel is located below the discharging end of the crushing mechanism. And the other end of the material guiding channel extends to the bottom of the material collecting cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of slag recovery, in particular to a closed slag recovery device used for pyrometallurgical zinc smelting. Background Art

[0002] As we all know, the waste slag produced during the smelting process (such as lead-zinc smelting slag, steel smelting slag, aluminum smelting slag, etc.) contains many valuable metals and a large amount of residual heat. Therefore, it is of great significance to efficiently process the metals and residual heat contained in it.

[0003] For example, a Chinese utility model patent discloses a waste heat recovery system for zinc smelting slag from a rotary kiln (publication number CN218155577U), which includes a furnace body, the two sides of which are a feeding area and a discharging area, respectively, and a loading and moving device is horizontally arranged in the furnace body; a slag pot is arranged on the loading and moving device; an air inlet and an air outlet are opened on the furnace body, and the air supply path connected in a straight line between the air inlet and the air outlet is perpendicular to the moving direction of the loading and moving device and passes through the loading and moving device, and the internal space of the furnace body between the air inlet and the air outlet forms a heat exchange area; the air outlet is externally connected to an air-to-air heat exchanger. It uses circulating air to cool the high-temperature slag, and the generated primary hot air passes through the air-to-air heat exchanger to further generate secondary hot air used as a drying heat source for the materials used in the rotary kiln. The turbid air mixed with particulate matter discharged from the air outlet is returned to the furnace body again through the circulating fan to be used for cooling the high-temperature slag, avoiding the problem of further pollution caused by direct discharge of turbid air.

[0004] However, when the inventors implemented this device, they found the following defects: the slag was concentrated in the slag pot, which was not conducive to the dissipation of heat inside the slag, and the waste heat utilization rate of the slag needed to be further improved. Utility Model Content

[0005] Technical issues

[0006] In view of the deficiencies in the prior art, the utility model provides a closed slag recovery device for pyrometallurgical zinc smelting which can improve the heat dissipation efficiency of the slag, make full use of the residual heat of the slag, and is more energy-saving and environmentally friendly.

[0007] Technical Solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a closed slag recovery device for pyrometallurgical zinc smelting, comprising a shell, a three-way feed box installed on the shell and communicating with the inside of the shell, a heat exchanger, a crushing mechanism and a receiving and guiding trough, the shell is provided with a collection cavity and a mounting cavity, the three-way feed box is provided with a vertical channel and an inclined channel communicating with the vertical channel, the vertical channel is communicated with the collection cavity, the heat exchanger is installed in the vertical channel, one end of the receiving and guiding trough is located below the vertical channel, the other end of the receiving and guiding trough extends downwardly toward the feed of the crushing mechanism, a guiding channel is installed at the bottom of the shell, the bottom end of the guiding channel is located below the discharge end of the crushing mechanism, and the other end of the guiding channel extends to the bottom of the collection cavity; further, the crushing mechanism can adopt a jaw crusher or a roller crusher.

[0009] As a preferred solution, it also includes a grinding mechanism, which is installed in the installation cavity, the feed end of the grinding mechanism is located below the discharge end of the crusher, and the discharge end of the grinding mechanism is connected to the material guide channel; further, the grinding mechanism is preferably a disc grinder, and other equivalent mechanisms with grinding effect can also be used.

[0010] As a preferred embodiment, the crushing mechanism includes a fixed jaw plate fixedly installed in the installation cavity, an eccentric shaft rotatably installed in the installation cavity, a movable jaw plate and an elastic assisting component. The movable jaw plate is provided with a through hole, and the eccentric shaft passes through the through hole. The movable jaw plate is elastically connected to the inner wall of the installation cavity through the elastic assisting component; the fixed jaw plate and the movable jaw plate are arranged in a V shape, and an electric motor is installed on the shell to provide power for the rotation of the eccentric shaft.

[0011] As a preferred solution, one end of the receiving and guiding trough is rotatably installed in the material collecting cavity, and the other end of the receiving and guiding trough is placed on the top of the movable jaw plate. The receiving and guiding trough is provided with a sieve hole, and the sieve hole is located above the material collecting cavity.

[0012] As a preferred solution, a multi-stage axial flow fan is installed in the collecting cavity, and the multi-stage axial flow fan is located directly below the vertical channel.

[0013] As a preferred solution, a sealing plate is rotatably installed at the inclined channel in the three-way feed box, and a driving member for providing power for opening and closing the sealing plate is installed on the three-way feed box; further, the driving member is preferably a driving cylinder and a shift rod, and the output end of the driving cylinder is transmission-connected to the sealing plate through the shift rod; the driving member can also be an equivalent member with a rotary driving effect, such as a rotary cylinder.

[0014] As a preferred solution, the three-way feed box is provided with a material guide tongue which is flush with the inner bottom wall of the inclined channel and extends toward the receiving material guide groove.

[0015] Beneficial Effects

[0016] Compared with the prior art, the utility model provides a closed slag recovery device for pyrometallurgical zinc smelting, which has the following beneficial effects: in the closed slag recovery device for pyrometallurgical zinc smelting, the lump slag slides through the inclined channel into the receiving and guiding trough for preliminary dispersion, the heat of the lump slag is initially dissipated and transferred to the heat exchanger in the vertical channel, and under the action of gravity, the lump slag slides along the receiving and guiding trough into the crushing mechanism, the lump slag is initially crushed by the crushing mechanism, and the crushed slag particles enter the aggregate cavity through the guiding channel to dissipate heat again, the hot air in the entire shell enters the vertical channel and transfers the heat to the heat exchanger, which can improve the heat dissipation efficiency of the slag, make full use of the residual heat of the slag, and is more energy-saving and environmentally friendly; at the same time, after the lump slag is crushed, it is convenient to subsequently recover the residual metal contained in the slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the top plan structure of the utility model;

[0019] Figure 3 The utility model Figure 2 Schematic diagram of the cross-section structure at AA in the middle;

[0020] Figure 4 It is a schematic diagram of the internal cutaway three-dimensional structure of the utility model;

[0021] Markings in the attached drawings: 1. Shell; 2. Three-way feed box; 3. Heat exchanger; 4. Material receiving and guiding trough; 5. Material collecting chamber; 6. Installation chamber; 7. Vertical channel; 8. Inclined channel; 9. Material guiding channel; 10. Grinding mechanism; 11. Fixed jaw plate; 12. Eccentric shaft; 13. Movable jaw plate; 14. Elastic assisting component; 15. Motor; 16. Sieve hole; 17. Multi-stage axial flow fan; 18. Sealing plate; 19. Driving member; 20. Material guiding tongue. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0023] As described in the background technology, a waste heat recovery system for rotary kiln zinc smelting slag; the slag is concentrated in the slag pot, which is not conducive to the heat loss inside the slag, and the waste heat utilization rate of the slag needs to be further improved.

[0024] In order to solve this technical problem, the utility model provides a closed slag recovery device for pyrometallurgical zinc smelting, which is applied to the recovery of slag from pyrometallurgical zinc smelting.

[0025] Specifically, please refer to Figure 1-4 The closed slag recovery equipment for pyrometallurgical zinc smelting specifically includes: a shell 1, a three-way feed box 2 installed on the shell 1 and communicating with the inside of the shell 1, a heat exchanger 3, a crushing mechanism and a receiving and guiding trough 4, a collecting cavity 5 and a mounting cavity 6 are provided in the shell 1, a vertical channel 7 and an inclined channel 8 communicating with the vertical channel 7 are provided in the three-way feed box 2, the vertical channel 7 is communicated with the collecting cavity 5, the heat exchanger 3 is installed in the vertical channel 7, one end of the receiving and guiding trough 4 is located below the vertical channel 7, and the other end of the receiving and guiding trough 4 extends downwardly and obliquely toward the feeding position of the crushing mechanism, a guiding channel 9 is installed at the bottom of the shell 1, the bottom end of the guiding channel 9 is located below the discharging end of the crushing mechanism, and the other end of the guiding channel 9 extends to the bottom of the collecting cavity 5; further, the crushing mechanism can adopt a jaw crusher or a roller crusher.

[0026] The utility model provides a closed slag recovery device for pyrometallurgical zinc smelting. The lump slag slides through the inclined channel 8 into the receiving and guiding trough 4 for preliminary dispersion. The heat of the lump slag is initially dissipated and transferred to the heat exchanger 3 in the vertical channel 7. Under the action of gravity, the lump slag slides along the receiving and guiding trough 4 into the crushing mechanism, and the lump slag is initially crushed by the crushing mechanism. The crushed slag particles enter the collecting cavity 5 through the guiding channel 9 for further heat dissipation. The hot air in the entire shell 1 enters the vertical channel 7 and transfers the heat to the heat exchanger 3, which can improve the heat dissipation efficiency of the slag, make full use of the residual heat of the slag, and is more energy-saving and environmentally friendly. At the same time, after the lump slag is crushed, it is convenient to subsequently recover the residual metal contained in the slag.

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] Example 1

[0031] Please refer to Figure 4 A closed slag recovery device for pyrometallurgical zinc smelting, comprising a shell 1, a three-way feed box 2 installed on the shell 1 and communicating with the inside of the shell 1, a heat exchanger 3, a crushing mechanism and a receiving and guiding trough 4, wherein the shell 1 is provided with a collecting cavity 5 and a mounting cavity 6, the three-way feed box 2 is provided with a vertical channel 7 and an inclined channel 8 communicating with the vertical channel 7, the vertical channel 7 is communicated with the collecting cavity 5, the heat exchanger 3 is installed in the vertical channel 7, one end of the receiving and guiding trough 4 is located below the vertical channel 7, and the other end of the receiving and guiding trough 4 is located below the vertical channel 7. It extends downwardly and obliquely toward the feed of the crushing mechanism, and a material guide channel 9 is installed at the bottom of the shell 1. The bottom end of the material guide channel 9 is located below the discharge end of the crushing mechanism, and the other end of the material guide channel 9 extends to the bottom of the collecting cavity 5; it also includes a grinding mechanism 10, which is installed in the installation cavity 6, and the feed end of the grinding mechanism 10 is located below the discharge end of the crusher, and the discharge end of the grinding mechanism 10 is connected to the material guide channel 9; further, the grinding mechanism 10 is preferably a disc grinder, and other equivalent mechanisms with a grinding effect can also be used.

[0032] The closed slag recovery equipment for pyrometallurgy provided in this embodiment further grinds the granular slag into powder through the grinding mechanism 10, and the powdered slag is dispersed into the collecting chamber 5 through the material guide channel 9 and fully dissipates the heat. The heat dissipation area of ​​the powdered slag is further increased compared with the granular slag, so as to further improve the utilization rate of the residual heat in the slag.

[0033] Example 2

[0034] The closed slag recovery equipment for pyrometallurgical zinc smelting provided in Example 1 is further optimized. Specifically, Figure 3-4 As shown, the crushing mechanism includes a fixed jaw plate 11 fixedly installed in the installation cavity 6, an eccentric shaft 12 rotatably installed in the installation cavity 6, a movable jaw plate 13 and an elastic booster assembly 14. The movable jaw plate 13 is provided with a through hole, and the eccentric shaft 12 passes through the through hole. The movable jaw plate 13 is elastically connected to the inner wall of the installation cavity 6 through the elastic booster assembly 14; the fixed jaw plate 11 and the movable jaw plate 13 are arranged in a V shape, and a motor 15 providing power for the rotation of the eccentric shaft 12 is installed on the housing 1;

[0035] One end of the receiving and guiding trough 4 is rotatably installed in the collecting cavity 5 , and the other end of the receiving and guiding trough 4 is placed on the top of the movable jaw plate 13 . The receiving and guiding trough 4 is provided with a sieve hole 16 , which is located above the collecting cavity 5 .

[0036] A multi-stage axial flow fan 17 is installed in the collecting chamber 5 , and the multi-stage axial flow fan 17 is located directly below the vertical channel 7 .

[0037] The closed slag recovery equipment for pyrometallurgical zinc smelting provided in this embodiment drives the eccentric shaft 12 to rotate through the motor 15, so that the eccentric shaft 12 drives the movable jaw plate 13 to move up and down, and the distance between the fixed jaw plate 11 and the movable jaw plate 13 changes, so as to realize the extrusion and crushing of the block slag; the movable jaw plate 13 moves up and down while pushing the receiving guide trough 4 to swing, so that the receiving guide trough 4 is in a vibrating state, which is conducive to further dispersion of the block slag in the receiving guide trough 4 and improves its smoothness of entering the crushing mechanism, thereby avoiding the block slag from gathering in the receiving guide trough 4, and at the same time Under the action of the sieve holes 16, the powdered slag falls directly to the bottom of the aggregate chamber 5, and the powder in the slag is preliminarily screened; after the multi-stage axial flow fan 17 is started, the powdered slag gathered at the bottom of the aggregate chamber 5 can be pressurized and blown into the vertical channel 7, so that the powdered slag is in direct contact with the heat exchanger 3 and then discharged, further improving the utilization rate of the heat in the slag; it should be noted that when the powdered slag is discharged, the inclined channel 8 is in a blocked state; the heat exchanger 3 needs to be cleaned after being used for a period of time to reduce the adhesion of powdered slag to the outside of the heat exchanger 3 to ensure the heat exchange performance of the heat exchanger 3.

[0038] Specifically, a baffle plate 18 is rotatably installed at the inclined channel 8 in the three-way feed box 2, and a driving member 19 is installed on the three-way feed box 2 to provide power for opening and closing the baffle plate 18; further, the driving member 19 is preferably a driving cylinder and a lever, and the output end of the driving cylinder is transmission-connected to the baffle plate 18 through the lever; the driving member 19 can also adopt an equivalent member with a rotary driving effect, such as a rotating cylinder; the baffle plate 18 can be rotated by starting the driving member 19, and when the block slag is loaded, the baffle plate 18 is disengaged from the obstruction of the inclined channel 8, and when the powdered slag at the bottom of the aggregate chamber 5 needs to be cleaned, the baffle plate 18 will completely block the inclined channel 8.

[0039] Specifically, the three-way feed box 2 is provided with a guide tongue 20 which is flush with the inner bottom wall of the inclined channel 8 and extends toward the receiving guide trough 4; the guide tongue 20 allows the lump slag to smoothly enter the receiving guide trough 4 to reduce the lump slag falling into the gap between the receiving guide trough 4 and the inner wall of the collecting cavity 5 to ensure the normal vibration of the receiving guide trough 4.

[0040] The use process of the closed slag recovery equipment for pyrometallurgy zinc smelting provided by the utility model is as follows: the lump slag slides through the inclined channel 8 to the receiving and guiding trough 4 for preliminary dispersion, the baffle plate 18 blocks the inclined channel 8, the heat of the lump slag is initially dissipated and transferred to the heat exchanger 3 in the vertical channel 7, and under the action of gravity, the lump slag slides along the receiving and guiding trough 4 to the crushing mechanism, and the lump slag is initially crushed by the crushing mechanism, and the crushed slag particles are further crushed by the grinding mechanism 10 and then enter the collecting chamber 5 through the guiding channel 9 to dissipate heat again, and by starting the multi-stage axial flow fan 17, the hot air in the entire shell 1 together with the powdered slag enters the vertical channel 7 and transfers the heat to the heat exchanger 3, the external suction fan can be connected to the vertical channel 7, and the powdered slag is sucked and transported to the metal recovery equipment by the external suction fan for metal recovery.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A closed slag recovery device for pyrometallurgical zinc smelting, characterized in that: The invention comprises a shell (1), a three-way feed box (2) installed on the shell (1) and communicating with the inside of the shell (1), a heat exchanger (3), a crushing mechanism and a receiving and guiding trough (4); the shell (1) is provided with a collecting cavity (5) and a mounting cavity (6); the three-way feed box (2) is provided with a vertical channel (7) and an inclined channel (8) communicating with the vertical channel (7); the vertical channel (7) is communicated with the collecting cavity (5); the heat exchanger (3) is installed in the vertical channel (7); one end of the receiving and guiding trough (4) is located below the vertical channel (7); the other end of the receiving and guiding trough (4) extends downwardly and obliquely toward the feeding position of the crushing mechanism; a guiding channel (9) is installed at the bottom of the shell (1); the bottom end of the guiding channel (9) is located below the discharging end of the crushing mechanism; the other end of the guiding channel (9) extends toward the bottom of the collecting cavity (5).

2. The closed slag recovery equipment for pyrometallurgical zinc smelting according to claim 1, characterized in that: It also comprises a grinding mechanism (10), the grinding mechanism (10) being installed in the installation cavity (6), the feeding end of the grinding mechanism (10) being located below the discharging end of the crusher, and the discharging end of the grinding mechanism (10) being connected to the material guide channel (9).

3. The closed slag recovery equipment for pyrometallurgical zinc smelting according to claim 1 or 2, characterized in that: The crushing mechanism comprises a fixed jaw plate (11) fixedly mounted in an installation cavity (6), an eccentric shaft (12) rotatably mounted in the installation cavity (6), a movable jaw plate (13) and an elastic assisting assembly (14); the movable jaw plate (13) is provided with a through-hole, the eccentric shaft (12) passes through the through-hole, and the movable jaw plate (13) is elastically connected to the inner wall of the installation cavity (6) via the elastic assisting assembly (14); the fixed jaw plate (11) and the movable jaw plate (13) are arranged in a V shape, and the housing (1) is provided with an electric motor (15) for providing power for the rotation of the eccentric shaft (12).

4. The closed slag recovery equipment for pyrometallurgical zinc smelting according to claim 2, characterized in that: One end of the receiving and guiding trough (4) is rotatably mounted in the material collecting cavity (5), and the other end of the receiving and guiding trough (4) is placed on the top of the movable jaw plate (13). A sieve hole (16) is provided on the receiving and guiding trough (4), and the sieve hole (16) is located above the material collecting cavity (5).

5. The closed slag recovery equipment for pyrometallurgical zinc smelting according to claim 4, characterized in that: A multi-stage axial flow fan (17) is installed in the collecting chamber (5), and the multi-stage axial flow fan (17) is located directly below the vertical channel (7).

6. The closed slag recovery equipment for pyrometallurgical zinc smelting according to claim 5, characterized in that: A sealing plate (18) is rotatably mounted at the inclined channel (8) in the three-way feed box (2), and a driving member (19) is mounted on the three-way feed box (2) to provide power for opening and closing the sealing plate (18).

7. The closed slag recovery equipment for pyrometallurgical zinc smelting according to claim 1, characterized in that: The three-way feed box (2) is provided with a material guide tongue (20) which is flush with the inner bottom wall of the inclined channel (8) and extends toward the receiving material guide groove (4).

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