Device and method for harmless treatment of secondary aluminum dross

Abstract

The present application belongs to the technical field of secondary aluminum ash treatment, and particularly relates to a secondary aluminum ash harmless treatment device and a secondary aluminum ash harmless treatment method, which comprises a tank body one, a feeding port is arranged at the upper end of the tank body one, a discharging pipe one and a discharging pipe two are arranged at the lower end of the tank body one in a penetrating manner, and a valve one is arranged on each of the discharging pipe one and the discharging pipe two; a material body supporting assembly, which comprises an internal supporting piece arranged horizontally in the tank body one, and a sieve hole is arranged on the supporting piece; and a reaction agent spraying assembly. The secondary aluminum ash harmless treatment device, the reaction agent solution continuously flushes the material body on the supporting piece, and the material body is fully reacted until the reaction is complete; the device is suitable for the use of the hydrolysis process of the secondary aluminum ash in the treatment process, the reaction agent solution is recycled, and the material body to be reacted is continuously flushed, so that the problem that a large amount of reaction agent solution needs to be consumed in the conventional soaking reaction process is solved.

Description

Technical Field

[0001] This invention belongs to the field of secondary aluminum ash treatment technology, and particularly relates to a device and method for harmless treatment of secondary aluminum ash. Background Technology

[0002] Aluminum processing enterprises generate large amounts of secondary aluminum ash during the recycling and regeneration of waste aluminum and the treatment of aluminum ash. Secondary aluminum ash is a hazardous waste containing large amounts of toxic and harmful substances such as fluorides, cyanides, aluminum carbide, and aluminum nitride. Therefore, it is necessary to use appropriate methods to treat secondary aluminum ash. The processes for treating secondary aluminum ash on the market generally include wet recycling and wet-pyrometallurgical combined recycling.

[0003] However, regardless of the recycling method used to treat secondary aluminum ash, a reactant needs to be added to the reactor to ensure a complete reaction between the reactant and the secondary aluminum ash. To achieve this, an excess of reactant solution needs to be added during the reaction, resulting in solution waste. To address these issues, a device and method for the harmless treatment of secondary aluminum ash are designed. Summary of the Invention

[0004] To address the problems in the prior art, the present invention proposes the following technical solution:

[0005] The secondary aluminum ash harmless treatment device includes:

[0006] Tank body one, the upper end of which is provided with a feed inlet, and the lower end of which is provided with a discharge pipe one and a discharge pipe two, and both the discharge pipe one and the discharge pipe two are provided with a valve one;

[0007] A material support assembly, comprising an internal support member horizontally disposed in a tank, the support member having sieve holes;

[0008] A reactant spraying assembly includes a tank 2 with a feeding section, a pipe 1 connected through one end of the tank 2, a movable end of the pipe 1 extending through the side wall of the tank 1 and above the support member, a pipe 2 connected through the other end of the tank 2 and the discharge pipe 2, and a pump body provided on the pipe 2.

[0009] The reactant solution seeps out from the support and is collected at the bottom of tank one, through discharge pipe two, and pipe two. It is then transported to tank two by the lifting action of the pump and continuously flushed by the material on the support through pipe one.

[0010] As a preferred embodiment of the above technical solution, the support member is a cylinder with at least one component, the side wall of the cylinder is provided with a sieve hole, the cylinder has a slot, and the inner wall of the cylinder is provided with a sieve mesh.

[0011] The movable end of the pipe body is closed, and a nozzle is provided through the pipe body at the position corresponding to the slot.

[0012] As a preferred embodiment of the above technical solution, the cylinder rotates periodically in alternating clockwise and counterclockwise directions. When the slot rotates to the upper end, the cylinder is in the feeding position. When the slot rotates to the lower end, the cylinder is in the discharging position. When the slot reciprocates in the upper position, the cylinder is in the flushing position.

[0013] A valve is provided on the first pipe body. When the slot rotates to the area covered by the nozzle, the valve opens to periodically flush the continuously mixed material.

[0014] As a preferred embodiment of the above technical solution, the material support assembly further includes a power unit that drives the support member to rotate periodically in alternating counterclockwise and clockwise directions;

[0015] The power unit includes a rotating shaft 1 and a rotating shaft 2 connected to both ends of the cylinder. The rotating shaft 1 and the rotating shaft 2 are rotatably engaged with the side wall of the tank body 1 and are mechanically sealed. The rotating shaft 2 extends to the outside of the tank body 1 and is fitted with a sprocket 1.

[0016] The power unit also includes at least two sprockets, at least one of which is provided with a drive component connected to the outer wall of the tank, and the other sprockets are rotatably engaged with the tank. Each sprocket is meshed with a chain, and the chain is meshed with the sprocket.

[0017] As a preferred embodiment of the above technical solution, the inlet of the tank body is connected to a gas collecting pipe, and the gas collecting pipe is externally connected to a gas treatment system for processing the reaction gas.

[0018] As a preferred embodiment of the above technical solution, a feeding pipe is also included, one end of which is fixed to the gas collecting pipe and the other end extends into the interior of the tank body to the top of the support member, and a valve is provided on the feeding pipe.

[0019] The method for harmless treatment of secondary aluminum ash includes the following steps:

[0020] S1. Material preparation: Rotate the cylinder to the feeding position where the slot is at the top, and convey the material into the cylinder through the slot;

[0021] S2. Reaction preparation: Add the reaction solution corresponding to the material into the interior of tank two through the feeding section;

[0022] S3. Flushing operation: The valve on the discharge pipe is closed.

[0023] A. Flushing: The control cylinder rotates counterclockwise and clockwise periodically at the flushing position. When the groove moves into the coverage area of ​​the nozzle, valve two is activated, and the reactant solution is sprayed out from the nozzle to flush the material.

[0024] B. Reaction agent collection: The reaction agent solution after being flushed by the material drips from the sieve holes, is collected through the bottom of tank one, discharge pipe two, and pipe two, and is transported to tank two under the lifting action of the pump. Then, it is periodically flushed by the material continuously mixed inside the cylinder through pipe one.

[0025] S4. Discharge of material and reactant: After the material and reactant solution have fully reacted,

[0026] A. When valve 1 on discharge pipe 2 is closed and valve 1 on discharge pipe 1 is opened, the reaction solution collected inside tank 2 is emptied and discharged through discharge pipe 1 after being collected at the bottom of tank 1.

[0027] B. Adjust the cylinder to the discharge position where the trough opening is at the lower end. The material falls from the trough opening, is collected at the bottom of the tank, and is discharged through the discharge pipe.

[0028] The beneficial effects of this invention are as follows:

[0029] 1. In this secondary aluminum ash harmless treatment device, the reactant solution seeps out from the support and is collected through the bottom of tank one, discharge pipe two, and pipe two. Under the lifting action of the pump, it is transported to tank two, and then continuously flushed by pipe one onto the support, allowing the material to fully react until the reaction is complete. This device is suitable for use in processes such as hydrolysis during the treatment of secondary aluminum ash. It adopts the recycling of the reactant solution and continuous flushing of the material to be reacted, solving the problem of consuming a large amount of reactant solution in conventional soaking reaction processes.

[0030] 2. In this secondary aluminum ash harmless treatment device, by setting the support component as a rotatable cylinder, and cooperating with the reactant spraying assembly, the material is kept in a continuous mixing state in the cylinder during the flushing process, so that it can fully contact the reactant solution, thereby improving the reaction rate and reaction effect; at the same time, the cylinder has a slot, which facilitates the material discharge operation when the slot is rotated to the discharge position at the lower end. Attached Figure Description

[0031] Figure 1 The diagram shown is a structural schematic of the secondary aluminum ash harmless treatment device in this embodiment;

[0032] Figure 2 The diagram shown is a top view of the material support assembly in this embodiment;

[0033] Figure 3The diagram shown is a structural schematic of the cylinder in this embodiment;

[0034] Figure 4 The diagram shown illustrates the different positions of the cylinder in this embodiment.

[0035] Figure (a) shows the state of the cylinder when it is in the feeding position;

[0036] (b) The figure shows the state of the cylinder when it is in the flushing position and rotated counterclockwise to the leftmost position;

[0037] (c) The figure shows the state of the cylinder when it is in the flushing position and rotated clockwise to the rightmost position;

[0038] (d) The figure shows the state of the cylinder when it is in the discharge position.

[0039] Reference numerals in the attached drawings: Tank 1 10, Discharge pipe 1 11, Discharge pipe 2 12, Material support assembly 20, Support component 21, Groove 211, Rotating shaft 1 22, Rotating shaft 2 23, Sprocket 1 24, Sprocket 2 25, Chain 26, Drive component 27, Reactant spraying assembly 30, Tank 2 31, Feeding section 311, Pipe 1 32, Valve 2 321, Nozzle 322, Pipe 2 33, Pump body 331, Gas collecting pipe 40, Feeding pipe 50, Valve 3 51. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0041] Example 1

[0042] like Figure 1 As shown, the secondary aluminum ash harmless treatment device includes: a tank body 10. To meet the reaction temperature requirements in different processes, a heating component and a temperature control component are installed on the tank body 10. A feed inlet is provided at the upper end of the tank body 10. A discharge pipe 11 and a discharge pipe 2 12 are provided through the lower end of the tank body 10. A valve is installed on both the discharge pipe 11 and the discharge pipe 2 12.

[0043] The material support assembly 20 includes a horizontally arranged internal support member 21 in the tank 10. The material is placed on the support member 21, and the support member 21 is provided with sieve holes. In order to prevent the material from leaking out of the support member 21, the aperture of the sieve holes is smaller than the particle size of the material.

[0044] The reactant spraying assembly 30 includes a tank 2 31 with a feeding section 311. One end of the tank 2 31 is connected to a pipe 1 32. The movable end of the pipe 1 32 passes through the side wall of the tank 1 10 and extends to the top of the support member 21. The other end of the tank 2 31 is connected to the discharge pipe 2 12 with a pipe 2 33. A pump body 331 is provided on the pipe 2 33.

[0045] In the reactant spraying assembly 30, the reactant solution sprayed from the tube 32 seeps out and drips through the sieve holes after reacting with the material. The reactant is collected at the bottom of the tank 10, the discharge pipe 12, and the tube 33. Under the action of the pump 331, it is lifted into the tank 31 and then continues to be sprayed out from the tube 32.

[0046] In the operation of this secondary aluminum ash harmless treatment device, valve 1 on the discharge pipe 11 is closed, and the material is transported from the inlet to the support 21. The reaction solution is circulated and sprayed onto the material through pipe 32. After the reaction is complete, the material on the support 21 is cleaned and discharged from the inlet. Then, valve 1 on the discharge pipe 22 is closed, and valve 1 on the discharge pipe 11 is opened, and the reaction solution is discharged from the discharge pipe 11.

[0047] The reactant solution seeps out from the support 21 and is collected at the bottom of the tank 10, through the discharge pipe 2 12, and through the pipe 2 33. It is then pumped into the tank 2 31 by the pump 331, and then continuously flushed onto the material on the support 21 through the pipe 1 32, allowing the material to fully react until the reaction is complete. This device is suitable for use in processes such as hydrolysis in the treatment of secondary aluminum ash. It adopts the recycling of the reactant solution and continuously flushes the material to be reacted, solving the problem of consuming a large amount of reactant solution in conventional soaking reaction processes.

[0048] Example 2

[0049] Derived from Example 1, such as Figure 1 , Figure 2 , Figure 3 As shown, the support member 21 is a cylinder with at least one component. The side wall of the cylinder is provided with a screen hole. The cylinder has a slot 211, which is the feed and discharge point of the cylinder. To prevent small material particles from falling through the screen hole, a screen 212 is provided on the inner wall of the cylinder. The movable end of the tube 32 is closed, and a nozzle 322 is provided through the tube 32 at the position corresponding to the slot 211.

[0050] The cylinder rotates periodically, alternating between clockwise and counterclockwise. When slot 211 rotates to the upper end, the cylinder is in the feeding position. Figure 4 As shown in Figure (a), when slot 211 rotates to the lower end, the cylinder is in the discharge position, as... Figure 4As shown in Figure (d), when slot 211 reciprocates in the upper position, the cylinder is in the scouring position, as... Figure 4 As shown in Figures (b) and (c), Figure (b) shows the state when rotated counterclockwise to the leftmost position, and Figure (c) shows the state when rotated clockwise to the rightmost position. A valve 321 is installed on the pipe body 32. When the slot 211 rotates to the area covered by the nozzle 322, the valve 321 opens to periodically flush the continuously mixed material.

[0051] The method for harmless treatment of secondary aluminum ash includes the following steps:

[0052] S1. Material preparation: Rotate the cylinder to the feeding position where the slot 211 is at the top, and convey the material into the cylinder through the feed port and slot 211;

[0053] S2. Reaction preparation: The reaction solution corresponding to the material is added into the interior of tank 31 through the feeding section 311;

[0054] S3. Flushing operation: Valve 1 on discharge pipe 11 is closed.

[0055] A. Flushing: The cylinder is controlled to rotate counterclockwise and clockwise periodically at the flushing position to mix the material inside the cylinder. When the slot 211 moves into the coverage area of ​​the nozzle 322, valve 2 321 is activated, and the reactant solution is sprayed out from the nozzle 322 to flush the material.

[0056] B. Reaction agent collection: The reaction agent solution after rinsing the material drips from the sieve holes and is collected through the bottom of tank 10, discharge pipe 2 12, and pipe 2 33. Under the lifting action of pump 331, it is transported to tank 2 31 and then periodically rinsed into the continuously mixed material inside the cylinder through pipe 1 32.

[0057] S4. Discharge of material and reactant: After the material and reactant solution have fully reacted,

[0058] A. Valve 1 on discharge pipe 2 12 is closed, and valve 1 on discharge pipe 11 is opened, so that the reaction solution collected inside tank 2 31 is emptied and discharged through discharge pipe 11 after being collected at the bottom of tank 10.

[0059] B. Adjust the cylinder to the discharge position where the slot 211 is at the lower end. The material falls from the slot 211, is collected at the bottom of the tank 10, and is discharged through the discharge pipe 11.

[0060] In this secondary aluminum ash harmless treatment device, by setting the support member 21 as a rotatable cylinder and cooperating with the reactant spraying assembly 30, the material is continuously mixed in the cylinder during the flushing process, so that it can fully contact the reactant solution and improve the reaction rate and reaction effect.

[0061] Meanwhile, the cylinder has a slot 211, which facilitates material discharge when the slot 211 is rotated to the discharge position at the lower end.

[0062] like Figure 2 As shown, the material support assembly 20 also includes a power unit that drives the support member 21 to rotate counterclockwise and clockwise alternately in a periodic manner; the power unit includes a first rotating shaft 22 and a second rotating shaft 23 connected to both ends of the cylinder. The first rotating shaft 22 and the second rotating shaft 23 are rotatably engaged with the side wall of the tank 10 and are mechanically sealed. The second rotating shaft 23 extends to the outside of the tank 10 and is fitted with a sprocket 24.

[0063] The power unit also includes at least two sprockets 25. At least one sprocket 25 is provided with a drive member 27 connected to the outer wall of the tank 10. The drive member 27 can be configured as a forward and reverse motor. The other sprockets 25 are rotatably engaged with the tank 10. The sprockets 25 are meshed with a chain 26, and the chain 26 is meshed with sprocket 24.

[0064] When the drive unit 27 is powered on, it drives the second sprocket 25 and the chain 26 to rotate clockwise and counterclockwise, thereby driving the first sprocket 24 and the cylinder to rotate synchronously in the opposite direction. The power unit is configured to provide power for the periodic rotation of the cylinder. At the same time, by using the cooperation of the first sprocket 24, the chain 26 and the second sprocket 25, multiple cylinders can be driven to move simultaneously.

[0065] like Figure 1 As shown, in order to utilize and treat the gases generated during the reaction, such as the ammonia gas generated by the hydrolysis of aluminum nitride during the aluminum ash washing and pre-leaching process, a gas collecting pipe 40 is connected to the feed inlet of the tank body 10. The gas collecting pipe 40 is connected to a gas treatment system for the reaction gases to prevent gas leakage and to reasonably treat and utilize the gases generated during the reaction.

[0066] like Figure 1 As shown, in order to solve the problem of feeding the support 21, a feeding pipe 50 is also included. One end of the feeding pipe 50 is fixed on the gas collecting pipe 40, and the other end extends into the interior of the tank 10 to the top of the support 21. A valve 3 51 is provided on the feeding pipe 50.

[0067] During the feeding operation, valve 3 51 is opened to transport the material to the support 21 through the feeding pipe 50. After the material is transported, valve 3 51 is closed. The setting of valve 3 51 controls the material transport and, after the material is transported, makes the tank 10 a closed environment to prevent the gas generated during the reaction from overflowing from the feeding pipe 50.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A device for harmless treatment of secondary aluminum dross, characterized in that The application relates to a material body supporting assembly and a reaction agent spraying assembly. The application relates to a material body supporting assembly and a reaction agent spraying assembly. The application relates to a material body supporting assembly and a reaction agent spraying assembly. The application relates to a material body supporting assembly and a reaction agent spraying assembly. The application relates to a material body supporting assembly and a reaction agent spraying assembly. The application relates to a material body supporting assembly and a reaction agent spraying assembly. The application relates to a material body supporting assembly and a reaction agent spraying assembly.

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3. The secondary aluminum dross harmless treatment device according to claim 1, characterized by, The inlet of the tank (10) is connected to a gas collecting pipe (40), which is externally connected to a gas treatment system for processing reaction gases.

4. The secondary aluminum dross harmless treatment device according to claim 3, characterized by It also includes a feeding pipe (50), one end of which is fixed to the gas collecting pipe (40) and the other end extends into the interior of the tank (10) to the top of the support (21). A valve (51) is provided on the feeding pipe (50).

5. A method for harmless treatment of secondary aluminum dross using the secondary aluminum dross harmless treatment apparatus according to claim 1, characterized by, Includes the following steps: S1. Material preparation: Rotate the cylinder to the feeding position at the upper end of the slot (211), and transport the material into the cylinder through the slot (211); S2. Reaction preparation: The reaction solution corresponding to the material is added to the inside of tank two (31) through the feeding section (311); S3. Flushing operation: Valve 1 on discharge pipe 1 (11) is closed. A, scouring: The control cylinder rotates counterclockwise and clockwise periodically at the scouring position. When the slot (211) moves into the coverage area of ​​the nozzle (322), valve two (321) is activated, and the reactant solution is sprayed out from the nozzle (322) to scouring the material. B. Reaction agent collection: The reaction agent solution after rinsing the material drips from the sieve holes and is collected through the bottom of tank one (10), discharge pipe two (12), and pipe two (33). It is then transported to tank two (31) under the lifting action of pump body (331), and then periodically rinsed into the continuously mixed material inside the cylinder through pipe one (32). S4. Discharge of material and reactant: After the material and reactant solution have fully reacted, A. Valve 1 on discharge pipe 2 (12) is closed, and valve 1 on discharge pipe 1 (11) is opened, so that the reaction solution collected inside tank 2 (31) is emptied and discharged through discharge pipe 1 (11) after being collected at the bottom of tank 1 (10); B. Adjust the cylinder to the discharge position where the slot (211) is at the bottom. The material falls from the slot (211), is collected at the bottom of the tank (10), and is discharged through the discharge pipe (11).

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