Recycled aluminum smelting dust collection and harmless treatment equipment

Abstract

The present invention discloses harmless treatment equipment for dust collected from recycled aluminum smelting. The dust collected from exhaust gas discharged from each smelting system is passed through an automatic feeding mechanism and then smelted at high temperature in a rotary furnace. The rotary furnace uses the dust collected as a heat source and the principle of high-temperature smelting to refine aluminum soup. During combustion, aluminum nitride and fluoride ions in the dust collected can be removed. The harmless treatment equipment for dust collected from recycled aluminum smelting of the present invention can further recover aluminum in the dust, and can remove aluminum nitride and fluoride ions in the dust collected, and then obtain finished refractory raw materials, thereby achieving the purpose of resource recycling and turning waste into treasure. The harmless treatment equipment for dust collected from recycled aluminum smelting of the present invention has the advantages of good extraction effect and resource recycling.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment in smelting systems, and in particular to a device for harmlessly treating dust collected from recycled aluminum smelting with good extraction effect and resource recycling. Background Art

[0002] Under the general trend of energy conservation and environmental protection, the treatment of waste gas discharged from the smelting system has always been the primary issue facing the smelting field. The dust collected in the smelting waste gas contains a variety of metals. How to extract metals such as aluminum from it to improve resource utilization efficiency is the primary issue facing the industry.

[0003] Aluminum and aluminum alloys have low density, high specific strength, corrosion resistance, oxidation resistance, electrical conductivity and thermal properties second only to silver and copper, good processability, non-toxicity, good low-temperature reflective properties, no magnetism, no sparks, beautiful surface gloss, surface coating and other special properties. They are widely used in construction, transportation, national defense, packaging and other industries and daily life.

[0004] Therefore, it is necessary to propose a harmless treatment device for recycled aluminum smelting dust to solve the existing problems. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art and provide a device for harmless treatment of recycled aluminum smelting dust with good extraction effect and resource recycling.

[0006] The technical solution of the present invention is:

[0007] The harmless treatment equipment of dust collected from recycled aluminum smelting comprises a rotary furnace and a collecting hopper arranged on the top of the rotary furnace; a conveying auger is arranged at the bottom of the collecting hopper, a feeding port of the conveying auger is connected with the bottom of the collecting hopper, and a discharging port of the conveying auger transmits the dust collected ash to the rotary furnace through an automatic feeding mechanism; the automatic feeding mechanism comprises a fixed bracket, a first motor, a chain transmission, a feeding pipe, a moving mechanism and a limiting bracket; the motor drives the moving mechanism to move along the fixed bracket through the chain transmission, the moving mechanism drives the feeding pipe to move, and the limiting bracket limits the feeding pipe; the rotary furnace comprises a furnace body, a furnace door, a base, a transmission system, a lifting hydraulic system and an electric control system; the furnace body is provided with a furnace mouth, the furnace door is arranged on the furnace mouth of the furnace body, and a material guide port is arranged on the furnace door; the furnace body support is arranged on the base; the transmission system drives the furnace body to rotate, and the lifting hydraulic system drives the furnace body to tilt; the electric control system controls the transmission system and the lifting hydraulic system.

[0008] As a preferred technical solution, an electric hoist lifting and feeding system is arranged above the collecting hopper, and the electric hoist lifting and feeding system includes an electric hoist device and a space bag, and the electric hoist device drives the space bag to move.

[0009] As a further preferred technical solution, it also includes an operating platform and a ladder, the operating platform is arranged corresponding to the aggregate hopper, and the operating platform is connected to the ground through the ladder.

[0010] As a preferred technical solution, the upper opening of the collecting hopper is closed and a material guide hole is provided on the upper opening of the collecting hopper.

[0011] As a further preferred technical solution, the diameter of the material guide hole is 600 mm.

[0012] As a preferred technical solution, the furnace door is provided with a material guide pipe corresponding to the material guide port.

[0013] As a preferred technical solution, the furnace door is provided with a cylinder, and the cylinder controls the furnace door to open.

[0014] As a preferred technical solution, the transmission system includes a motor and a supporting wheel, and the furnace body is driven to rotate by the motor through the supporting wheel.

[0015] As a preferred technical solution, the furnace body is tilted on the base through supporting wheels, and the tilt angle is 3° to 6°.

[0016] As a preferred technical solution, the furnace body is a steel cylinder, the inner lining of which is a refractory material; a small smoke hood is provided on the top of the outer side of the furnace body.

[0017] The harmless treatment equipment for dust collected from the waste gas discharged from each smelting system of the present invention passes the dust collected from the waste gas through an automatic feeding mechanism and then through a rotary furnace for high-temperature smelting. The rotary furnace uses the dust collected as a heat source and utilizes the principle of high-temperature smelting to extract aluminum soup (the dust collected is rotated and stirred in the barrel, and is fully contacted with oxygen to spontaneously ignite to generate high temperature, melted into aluminum water and naturally separated from the dust collected, and precipitated to achieve the purpose of extracting aluminum soup). During combustion, aluminum nitride and fluoride ions in the dust collected can be removed. The harmless treatment equipment for dust collected from the waste gas of the present invention can further recover the aluminum inside on the one hand, and can remove aluminum nitride and fluoride ions in the dust collected on the other hand, and finally obtain the finished refractory raw material, thereby achieving the purpose of resource recycling and turning waste into treasure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a side view of a specific embodiment of the equipment for harmless treatment of dust collected from recycled aluminum smelting according to the present invention;

[0019] Figure 2 It is a front view of a specific implementation method of the equipment for harmless treatment of dust collected from recycled aluminum smelting according to the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, but does not exclude the situation of including at least one.

[0022] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0023] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0024] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0025] like Figure 1 and Figure 2The figure shows a harmless treatment device for dust collected from recycled aluminum smelting of the present invention, comprising a rotary furnace 1 and a collecting hopper 2 arranged on the top of the rotary furnace 1; a conveying auger 3 is arranged at the bottom of the collecting hopper 2, the feeding port of the conveying auger 3 is connected to the bottom of the collecting hopper 2, and the discharge port of the conveying auger 3 transmits the dust collected ash to the rotary furnace 1 through an automatic feeding mechanism 4; the automatic feeding mechanism 4 comprises a fixed bracket 41, a first motor 42, a chain drive 43, a feeding pipe 44, a moving mechanism 45 and a limiting bracket 46; the motor 42 drives the moving mechanism 45 along the fixed bracket through the chain drive 43 41 moves, the motion mechanism 45 drives the discharge pipe 44 to move, and the limiting bracket 46 limits the discharge pipe 44; the rotary kiln 1 includes a furnace body, a furnace door 11, a base 12, a transmission system 13, a lifting hydraulic system 14 and an electronic control system; the furnace body is provided with a furnace mouth, the furnace door 11 is arranged on the furnace mouth of the furnace body, and the furnace door 11 is provided with a material guide port 11a; the furnace body support is arranged on the base 12; the transmission system 13 drives the furnace body to rotate, and the lifting hydraulic system 14 drives the furnace body to tilt; the electronic control system controls the transmission system and the lifting hydraulic system.

[0026] In the harmless treatment equipment for recycled aluminum smelting dust of this embodiment, after the dust enters the collecting hopper 2, a conveying auger 3 is provided at the bottom of the collecting hopper 2 (the conveying auger 3 is driven by a motor reducer, and the conveying speed can be adjusted), and the dust is discharged from the collecting hopper 2 to the feeding port of the conveying auger 3, and the blades of the conveying auger 3 are driven by the motor to operate, and the dust is transported from the feeding port of the conveying auger 3 to the discharging port of the conveying auger 3. The dust is transferred from the discharging port of the conveying auger 3 to the furnace body of the rotary furnace 1 through the automatic feeding mechanism 4.

[0027] The automatic feeding mechanism 4 is composed of a fixed bracket 41, a motor 42, a chain drive 43, a feeding pipe 44, a moving mechanism 45, a limiting bracket 46 and a limiting bearing seat 47. In this embodiment, the moving mechanism 45 is a trolley. In actual applications, other forms of moving mechanisms can also be used. When the rotary kiln 1 needs to be fed, the first motor 42 of the automatic feeding mechanism 4 is turned on to run forward, the first motor 42 starts to work, the first motor 42 drives the chain transmission structure 43 to operate, the chain transmission structure 43 drives the trolley 45 to move, the trolley 45 starts to drive to the front end of the fixed bracket 41, the feeding pipe 44 is driven forward by the trolley 45, and the feeding pipe 44 slowly approaches the furnace door 11 of the rotary kiln 1. When the trolley 45 reaches the bottom of the front end of the fixed bracket 41, the first motor 42 stops working, the feeding pipe 44 is perpendicular to the furnace door 11 of the rotary kiln 1, the top of the feeding pipe 44 just falls on the discharge port of the conveying auger 3, and the bottom of the feeding pipe 44 is located on the guide port 11a of the furnace door 11 of the rotary kiln 1. At this time, the equipment is ready for feeding and starts feeding. First, the second motor of the conveying auger 3 is started, and the dust collected is driven by the blades of the conveying auger 3 and transmitted to the discharge pipe 44. After the discharge from the discharge pipe 44, the dust reaches the material guide port 11a of the furnace door 11 of the rotary furnace 1, and is guided into the furnace body of the rotary furnace 1 through the material guide port 11a.

[0028] After the feeding is completed, the feeding needs to be stopped. First, the second motor of the conveying auger 3 is stopped, the conveying auger 3 stops transmitting the dust, and then the first motor 42 of the automatic feeding mechanism 4 is turned on to reversely run, the first motor 42 drives the chain transmission structure 43, the chain transmission structure 43 drives the trolley 45 to run toward the end of the fixed bracket 41, and the feeding pipe 44 is slowly pushed backward. In the process of pushing the feeding pipe 44 backward, the feeding pipe 44 will contact the limit bracket 46 during the descent process. The limit bracket 46 has two bearing seats 47 at the lower end, and the bearing seats 47 drive the horizontal axis to rotate. When the trolley 45 reaches the end of the fixed bracket 41, the first motor 42 and the chain transmission structure 43 stop working, and the tube wall of the feeding pipe 44 rotates on the horizontal axis of the limit bracket 46 and is limited, and the feeding pipe 44 is lifted upward to a fixed position. At this time, the automatic feeding mechanism 4 will stop working. The purpose of limiting and lifting the feeding pipe 44 is to prevent the feeding pipe from colliding with the furnace mouth of the rotary kiln and the feeding pipe from being burned by the high temperature of the furnace mouth when the rotary kiln is working.

[0029] like Figure 1 and Figure 2 As shown, the harmless treatment equipment for recycled aluminum smelting dust in this embodiment also includes an electric hoist lifting and feeding system arranged above the collecting hopper 2, and the electric hoist lifting and feeding system includes an electric hoist device 5 and a space bag 6, and the electric hoist device 5 drives the space bag 6 to move. Corresponding to the electric hoist lifting and feeding system, as shown in FIG. Figure 1 and Figure 2As shown, the harmless treatment equipment for dust collected from recycled aluminum smelting in this embodiment also includes an operating platform 7 and a ladder 8. The operating platform 7 is arranged corresponding to the collecting hopper 2, and the operating platform 7 is connected to the ground through the ladder 8.

[0030] The working method of the electric hoist lifting and feeding system is as follows: first, the waste gas discharged from the smelting system is collected by the dust collector lower hopper and the dust collected is collected by the space bag 6. The space bag 6 needs to adopt an upper and lower draw-mouth type. The upper mouth of the space bag 6 can collect the dust, and the lower mouth has a draw rope. The draw rope can be untied to unload. The operator lifts the space bag 6 filled with dust on the ground with an electric hoist device 5, remotely controls the electric hoist device 5, lifts it to the area above the collecting hopper 2 at the top of the rotary furnace 1, and then slowly descends to a position where manual operation can be performed. The operator climbs the ladder 8 to the operating platform 7, comes to the operating area above the collecting hopper 2, opens the lower draw mouth of the space bag 6, and the space bag 6 begins to slowly unload into the collecting hopper 2.

[0031] like Figure 2 As shown, in the harmless treatment equipment for recycled aluminum smelting dust ash of this embodiment, the upper opening of the collecting hopper 2 is closed and only one guide hole 2a is provided. As one of the options, the diameter of the guide hole 2a can be 600 mm. After the dust ash flows out of the space bag 6, it enters the collecting hopper 2 through the guide hole 2a on the collecting hopper 2. The reason for opening the guide hole 2a on the upper opening of the collecting hopper 2 is that the dust ash is granular. If an open hopper is used in the unloading process, the dust ash will rise with the air during unloading, and the dust will spread everywhere, polluting the workshop. When using a guide-type collecting hopper, the dust ash will rise with the air during unloading and be blocked by the steel plate on the upper cover, so that the dust ash can only be dispersed in the collecting hopper and will not spread everywhere, thereby achieving the purpose of environmental protection and reducing dust hazards.

[0032] As a preferred solution, in this embodiment, the furnace door 11 is provided with a material guide pipe corresponding to the material guide port 11a. The furnace door 11 is provided with a cylinder, and the cylinder controls the furnace door to open. The transmission system 13 includes a motor and a supporting wheel, and the furnace body is driven to rotate by the motor through the supporting wheel. The furnace body is tilted on the base 12 through the supporting wheel, and the tilt angle is 3° to 6°. The furnace body is a steel cylinder, and the inner lining of the steel cylinder is a refractory material; a small smoke hood 15 is provided on the top of the outer side of the furnace body.

[0033] The harmless treatment equipment for dust collected from recycled aluminum smelting in this embodiment, the rotary furnace 1 includes a furnace body, a furnace door 11, a base 12, a transmission system 13, a lifting hydraulic system 14 and an electronic control system. The rotary furnace 1 can rotate forward and reverse, and each of the forward and reverse rotations has an extreme position. The rotary furnace 1 is provided with a furnace door 11, and the furnace door 11 has a material guide hole 11a, which is convenient for guiding the material into the furnace body of the rotary furnace 1. The opening mode of the furnace door 11 of the rotary furnace 1 is controlled by a cylinder. When the cylinder starts working, the furnace door 11 opens, and when the cylinder stops working, the furnace door 11 closes. The furnace body of the rotary furnace 1 is a steel cylinder with a refractory lining. The furnace body is supported on several pairs of supporting wheels and has an inclination of 3° to 6°. The furnace body is driven by an electric motor to rotate slowly through the supporting wheels. The dust collected by the automatic feeding mechanism 4 is rotated and stirred in the barrel body by the forward and backward rotation of the rotary furnace 1 and the front and back stirring of the forklift rake, and the dust collected by the automatic feeding mechanism 4 is fully contacted with oxygen to spontaneously ignite and generate high temperature, melt into aluminum water and separate from the dust collected by the dust collected by the automatic feeding mechanism 4, and precipitate to achieve the purpose of extracting aluminum soup, that is, the aluminum water in the aluminum slag of the dust collected by the automatic feeding mechanism 4 can be separated. During the operation, attention should be paid to controlling the temperature. Hot slag or small raw aluminum can be added as a temperature control agent and secondary refining. After the treatment is completed, the furnace body of the rotary furnace 1 can be tilted and lifted up by the hydraulic cylinder of the lifting hydraulic system 14 to pour out the aluminum water. After the aluminum water is poured out, the furnace body of the rotary furnace 1 can be rotated to unload the ash, which is simple and convenient to operate. When the rotary furnace 1 is working, the butterfly valve of the small smoke hood 15 is automatically opened, and the dust is automatically sucked into the dust collector. The rotary furnace 1 does not need a heating device to process the dust collected by the rotary furnace 1, and can be continuously operated and processed. The operation process does not require additional energy consumption except for the electric energy for the operation of the equipment. Since it is centralized processing, the dust generated is convenient for centralized collection, which truly achieves energy saving and environmental protection.

[0034] The harmless treatment equipment for dust collected from the waste gas discharged from each smelting system of the present invention passes the dust collected from the waste gas through an automatic feeding mechanism and then through a rotary furnace for high-temperature smelting. The rotary furnace uses the dust collected as a heat source and utilizes the principle of high-temperature smelting to extract aluminum soup (the dust collected is rotated and stirred in the barrel, and is fully contacted with oxygen to spontaneously ignite to generate high temperature, melted into aluminum water and naturally separated from the dust collected, and precipitated to achieve the purpose of extracting aluminum soup). During combustion, aluminum nitride and fluoride ions in the dust collected can be removed. The harmless treatment equipment for dust collected from the waste gas of the present invention can further recover the aluminum inside on the one hand, and can remove aluminum nitride and fluoride ions in the dust collected on the other hand, and finally obtain the finished refractory raw material, thereby achieving the purpose of resource recycling and turning waste into treasure.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, any equivalent changes and modifications made according to the content of the patent application scope of the present invention should belong to the technical scope of the present invention.

Claims

1. The equipment for harmless treatment of dust collected from secondary aluminum smelting is characterized by: It comprises a rotary kiln and a collecting hopper arranged on the top of the rotary kiln; a conveying auger is arranged at the bottom of the collecting hopper, a feeding port of the conveying auger is connected with the bottom of the collecting hopper, and a discharging port of the conveying auger transmits the collected dust to the rotary kiln through an automatic feeding mechanism; the automatic feeding mechanism comprises a fixed bracket, a first motor, a chain transmission structure, a feeding pipe, a moving mechanism and a limiting bracket; the first motor drives the moving mechanism to move along the fixed bracket through the chain transmission, the moving mechanism drives the feeding pipe to move, and the limiting bracket limits the feeding pipe; the rotary kiln comprises a furnace body, a furnace door, a base, a transmission system, a lifting hydraulic system and an electric control system; the furnace body is provided with a furnace mouth, the furnace door is arranged on the furnace mouth of the furnace body, and a material guide port is arranged on the furnace door; the furnace body support is arranged on the base; the transmission system drives the furnace body to rotate, and the lifting hydraulic system drives the furnace body to tilt; the electric control system controls the transmission system and the lifting hydraulic system; The moving mechanism is a trolley. When the rotary kiln needs to be fed, the first motor of the automatic feeding mechanism is turned on to run forward, the first motor starts to work, the first motor drives the chain transmission structure to operate, the chain transmission structure drives the trolley to move, the trolley starts to drive to the front end of the fixed bracket, the feeding pipe is driven forward by the trolley, and the feeding pipe slowly approaches the furnace door of the rotary kiln. When the trolley reaches the bottom of the front end of the fixed bracket, the first motor stops working, the feeding pipe is perpendicular to the furnace door of the rotary kiln, the top of the feeding pipe just falls on the discharge port of the conveying auger, and the bottom of the feeding pipe is located on the guide port of the furnace door of the rotary kiln; at this time, the equipment has the conditions for feeding and starts feeding; first start the second motor of the conveying auger, the dust collected is driven by the blades of the conveying auger and transmitted to the feeding pipe, after the feeding pipe discharges the material, it reaches the guide port of the furnace door of the rotary kiln, and the material is guided into the furnace body of the rotary kiln from the guide port; After the feeding is completed, the feeding needs to be stopped; first stop the second motor of the conveying auger, the conveying auger stops transmitting the collected dust, and then start the first motor of the automatic feeding mechanism to reverse and run, the first motor drives the chain transmission structure, the chain transmission structure drives the trolley to run to the end of the fixed bracket, the feeding pipe is slowly pushed backwards, and in the process of pushing the feeding pipe backwards, it will contact the limit bracket during the descending process. There are two bearing seats at the lower end of the limit bracket, and the bearing seats drive the horizontal axis to rotate. When the trolley reaches the end of the fixed bracket, the first motor and the chain transmission structure stop working, the tube wall of the feeding pipe rotates on the horizontal axis of the limit bracket and is limited, the feeding pipe is lifted up to a fixed position, and the automatic feeding mechanism will stop working at this time; the purpose of limiting and lifting the feeding pipe is to prevent the feeding pipe from colliding with the furnace mouth of the rotary kiln and being burned by the high temperature of the furnace mouth when the rotary kiln is working.

2. The harmless treatment equipment for recycled aluminum smelting dust according to claim 1 is characterized by: An electric hoist lifting and feeding system is arranged above the collecting hopper. The electric hoist lifting and feeding system comprises an electric hoist device and a space bag. The electric hoist device drives the space bag to move.

3. The harmless treatment equipment for recycled aluminum smelting dust according to claim 2 is characterized by: It also includes an operating platform and a ladder. The operating platform is arranged corresponding to the aggregate hopper, and the operating platform is connected to the ground through the ladder.

4. The harmless treatment equipment for recycled aluminum smelting dust according to claim 1 is characterized in that: The upper opening of the collecting hopper is closed and is provided with a material guiding hole.

5. The harmless treatment equipment for recycled aluminum smelting dust according to claim 4 is characterized by: The diameter of the material guide hole is 600 mm.

6. The harmless treatment equipment for recycled aluminum smelting dust according to claim 1 is characterized by: The furnace door is provided with a material guiding pipe corresponding to the material guiding opening.

7. The harmless treatment equipment for recycled aluminum smelting dust according to claim 1 is characterized by: The furnace door is provided with a cylinder, and the cylinder controls the furnace door to open.

8. The harmless treatment equipment for recycled aluminum smelting dust according to claim 1 is characterized by: The transmission system comprises a motor and a supporting wheel, and the furnace body is driven to rotate by the motor via the supporting wheel.

9. The harmless treatment equipment for recycled aluminum smelting dust according to claim 1 is characterized by: The furnace body is tilted on the base through supporting wheels, and the tilt angle is 3° to 6°.

10. The harmless treatment equipment for recycled aluminum smelting dust according to claim 1 is characterized by: The furnace body is a steel cylinder, the inner lining of which is a refractory material; a small smoke hood is arranged on the top of the outer side of the furnace body.

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