Oxidation furnace device for preparing copper oxide from regenerated copper powder and oxidation process of oxidation furnace device

Abstract

The invention belongs to the technical field of oxidation furnaces, and particularly relates to an oxidation furnace device for preparing copper oxide from regenerated copper powder and an oxidation process thereof.The oxidation furnace assembly comprises a furnace body, a first driving mechanism and an air inlet pipe, the first driving mechanism is used for driving the furnace body to rotate, and a plurality of stirring blades are spirally arranged on the inner wall of the furnace body; a heater is arranged in the furnace body, a valve is arranged on the side wall of the furnace body, one end of the air inlet pipe is communicated into the furnace body, the crusher assembly comprises a crushing bin, a rotor and an impact part, the rotor is rotatably arranged in a crushing cavity, the impact part is arranged on the rotor and used for colliding with materials, and a collision plate is arranged on one side of the rotor and used for colliding with the materials. By adopting the oxidation furnace device and the oxidation process steps, the oxidation time is reduced from 8 hours to 4 hours, the treatment energy consumption is reduced from 800 kWh to 400 kWh, and the energy consumption is reduced by about 50%; and the method has the advantages of low energy consumption, high oxidation efficiency and high copper oxide purity.

Description

Technical Field

[0001] The invention belongs to the technical field of oxidation furnaces, and in particular relates to an oxidation furnace device for preparing copper oxide from recycled copper powder and an oxidation process thereof. Background Art

[0002] With the deepening of the concept of resource recycling, the recycling of metal resources contained in waste batteries, especially copper and graphite, has gradually become a research hotspot. The copper negative electrode material in waste batteries not only has a high recycling value, but also has been highly praised in many industrial applications because of its superior performance in chemical catalysis and material transfer. In particular, the oxidation treatment of copper, the copper oxide generated by it has excellent chemical stability and multiphase catalytic activity, and is widely used in high value-added fields such as catalytic reactions and electronic components.

[0003] However, in the process of oxidizing pure copper to copper oxide, existing technologies generally face limitations such as high energy demand, lagging oxidation efficiency, and poor purity of target products. The above technical bottlenecks not only inhibit the possibility of efficient conversion of copper resources into industrial-grade copper oxide, but also restrict the sustainable production of low-energy consumption and high-purity oxidation products during industrial promotion. In response to these problems, it is urgent to introduce a refined reaction control mechanism in the oxidation process design, and to achieve the optimal conversion of copper resources and a breakthrough improvement in product performance by rationally optimizing the energy transfer path. Summary of the invention

[0004] In view of this, in order to solve the problems existing in the prior art, the purpose of the present invention is to provide an oxidation furnace device and an oxidation process for preparing copper oxide from recycled copper powder, which has the effects of low energy consumption, high oxidation efficiency and high purity of copper oxide.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] An oxidation furnace device for preparing copper oxide from recycled copper powder, comprising: a crusher assembly, an oxidation furnace assembly and a cooling stage assembly, wherein the oxidation furnace assembly comprises a furnace body, a first driving mechanism and an air inlet pipe, wherein the first driving mechanism is used to drive the furnace body to rotate, a plurality of stirring blades are spirally arranged on the inner wall of the furnace body, a heater is arranged inside the furnace body, a valve for feeding and discharging is arranged on the side wall of the furnace body, at least a part of the crusher assembly is located above the valve, at least a part of the cooling stage assembly is located below the valve, and one end of the air inlet pipe is connected to the furnace body;

[0007] The crusher assembly includes a crushing chamber, a rotor and an impact component. A crushing chamber is formed in the crushing chamber. The rotor is rotatably arranged in the crushing chamber. The impact component is arranged on the rotor and is used to collide with the material. A collision plate is arranged in the crushing chamber. The collision plate is arranged on one side of the rotor. The material hits the collision plate after colliding with the impact component.

[0008] The specific technical effect is: the impact component is driven to rotate by the rotation of the rotor, so that the pure copper is hit and broken by the impact component, and the broken pure copper is thrown onto the collision plate under the action of centrifugal force, and is further broken to a particle size of less than or equal to 5mm, so that the broken pure copper particles are more uniform, which is beneficial to the subsequent oxidation treatment; by setting a rotating furnace body and spirally arranging a number of stirring blades on the inner wall of the furnace body, the copper particles are evenly distributed, and the particles are heated more evenly, so that they can fully contact with the working gas in the furnace body to complete the oxidation reaction.

[0009] Furthermore, the first driving mechanism includes a first driving motor, a first driving wheel, a first passive wheel, a first connecting shaft and a first belt, the first driving wheel is arranged on the motor shaft of the first driving motor, the first driving wheel and the first passive wheel are driven by the first belt, and the two ends of the first connecting shaft are respectively connected to the first passive wheel and the furnace body.

[0010] The specific technical effect is: by setting the first drive motor and the belt transmission, the furnace body can rotate during the oxidation reaction, so that the pure copper particles in the furnace body are heated more evenly.

[0011] Furthermore, the oxidation furnace assembly also includes two supporting bases and two first bearing seats, the two first bearing seats are respectively arranged on the supporting bases and located at both ends of the furnace body, the first connecting shaft is installed on one of the first bearing seats through a bearing, and the air inlet pipe is installed on the other first bearing seat through a bearing.

[0012] Furthermore, a feed port is provided at the upper end of the crushing bin, and a discharge port is provided at the lower end of the crushing bin.

[0013] Furthermore, the crusher assembly also includes two second driving mechanisms and a screening and transporting assembly. The two second driving mechanisms are respectively located on both sides outside the crushing bin and are connected to both ends of the rotor. The two driving mechanisms are used to drive the rotor to rotate. The screening and transporting assembly is arranged below the discharge port and is used to receive the crushed material. One end of the screening and transporting assembly extends to above the valve.

[0014] Furthermore, each of the second drive mechanisms includes a second drive motor, a second driving wheel, a second driven wheel, a second connecting shaft, a second belt and a second bearing seat, the second driving wheel is arranged on the motor shaft of the second drive motor, the second driving wheel and the second driven wheel are driven by the second belt, the two ends of the second connecting shaft are respectively connected to the second driven wheel and the rotor, the second bearing seat is installed on the outer wall of the crushing bin, and the second connecting shaft is installed on the second bearing seat through a bearing.

[0015] The specific technical effect is: by setting a second drive motor and a belt drive, the rotor can rotate at high speed, so that a high-speed collision occurs between the impact component and the pure copper material to crush the pure copper material, and the pure copper material that is not crushed thoroughly enough is thrown out by the centrifugal force and thrown onto the collision plate, and is further impacted and crushed.

[0016] Furthermore, the screening and transporting assembly includes a bracket, a material drop bin, a screening drum, a guide plate and a conveyor belt. The material drop bin is arranged above the bracket, and an inlet is provided at the upper end of the material drop bin, and the inlet is connected with the discharge port. A material drop port is provided at the lower end of the material drop bin. The screening drum is obliquely installed on the bracket, and one end of the screening drum is connected with the material drop port. A plurality of sieve holes are provided on the side wall of the screening drum. The guide plate is arranged on the other end of the screening drum, and the guide plate is arranged lower than the material drop port. The conveyor belt is arranged on the bracket, and one end of the conveyor belt is located below the sieve hole of the screening drum, and the other end of the conveyor belt extends to above the valve.

[0017] The specific technical effect is: the crushed pure copper particles fall into the drop bin, and then are further screened by the screening cylinder to ensure that the diameter of the pure copper particles entering the oxidation furnace is less than or equal to 5mm, thereby improving the oxidation efficiency. Copper blocks larger than 5mm continue to roll along the screening cylinder to the guide plate and are collected for secondary crushing.

[0018] Furthermore, a third drive motor and a third bearing seat are provided on the bracket, the motor shaft of the third drive motor is connected to the other end of the screening drum, the third bearing seat is installed on the bracket, and the motor shaft of the third drive motor is installed on the third bearing seat through a bearing.

[0019] The specific technical effect is: by setting the third drive motor, the screening drum can be rotated to improve screening efficiency.

[0020] Furthermore, the cooling table assembly includes a support frame, a conveying roller and a conveyor belt, the conveying roller is rotatably mounted on the upper end of the support frame, the conveyor belt is arranged on the outer side of the conveying roller, and the conveyor belt is located below the valve.

[0021] The specific technical effect is: the conveyor belt is arranged below the valve, so that the copper oxide after oxidation is completed can fall directly on the conveyor belt for cooling; through the cooperation of the conveyor roller and the conveyor belt, the copper oxide cooled to room temperature can continue to be transported to the next process for collection or packaging.

[0022] An oxidation process, using the oxidation furnace device for preparing copper oxide from the recycled copper powder as described above to oxidize pure copper into copper oxide, wherein the process comprises the following steps:

[0023] Step S1, crushing processing, start the second driving motor to drive the second driving wheel to rotate, the second driving wheel and the second driven wheel are driven by the second belt, so that the rotor rotates, and then the impact component installed on the rotor rotates with the rotor, and the pure copper obtained from the aeration separation is put into the crushing chamber of the crushing bin from the feed port, and the pure copper is hit by the impact component and crushed, and the crushed pure copper is thrown onto the collision plate under the action of centrifugal force and further crushed, and the crushed copper blocks fall into the drop bin from the discharge port, and then enter the screening cylinder through the drop bin. The screen hole diameter on the screening cylinder is 5mm, and the copper blocks less than or equal to 5mm pass through the screen hole and fall on the conveyor belt, and the copper blocks larger than 5mm continue to roll along the screening cylinder to the guide plate, and are collected for secondary crushing;

[0024] Step S2, preheating the oxidation furnace, connecting the heater to an external power source, turning on the heater, raising the temperature of the oxidation zone to within the range of 450°C to 550°C, and setting the heating rate to 5°C / min to 15°C / min;

[0025] Step S3, loading, opening the conveyor belt, transporting the copper blocks with a diameter of less than or equal to 5 mm obtained in step S1 to the oxidation furnace, opening the valve, and allowing the broken copper blocks to fall into the furnace body;

[0026] Step S4, oxidation treatment, the temperature of the oxidation zone is maintained in the range of 450°C to 550°C, oxygen or air is introduced into the furnace body through the air intake pipe, the air intake flow rate is set to 1L / min to 3L / min, and at the same time, the first driving motor is turned on to drive the first driving wheel to rotate, the first driving wheel and the first driven wheel are driven by the first belt, so that the furnace body rotates, and the copper block in the furnace body is stirred by the stirring blades as it rotates;

[0027] Step S5, cooling the discharged material, after the oxidation reaction is completed, turning off the first drive motor, opening the valve, and the copper oxide after the oxidation in step S4 falls from the valve onto the conveyor belt;

[0028] Step S6: Cooling and collecting: After the copper oxide on the conveyor belt cools to room temperature, it is collected and packaged.

[0029] The specific technical effect is: using this oxidation process step, the pure copper obtained from aeration separation is first crushed, and the crushed pure copper particles are more uniform, which increases the contact area between copper and the working gas and is beneficial to the subsequent oxidation treatment. The oxidation furnace is then preheated to ensure that a stable oxidation environment is reached in the furnace. The crushed pure copper particles are evenly loaded into the furnace body. With the cooperation of stirring blades, the copper particles are evenly distributed and the particles are heated more evenly to improve the oxidation efficiency. The oxidation treatment is carried out under this parameter to ensure that the pure copper particles are fully in contact with the working gas, so that the oxidation time is reduced from 8h to 4h, and the processing energy consumption is reduced from 800kWh to 400kWh, and the energy consumption is reduced by about 50%; the purity of copper oxide is increased from 95% to 99%, which has the advantages of low energy consumption, high oxidation efficiency and high copper oxide purity.

[0030] The beneficial effects of the present invention are:

[0031] (1) The rotor rotates to drive the impact component to rotate together, so that the pure copper is hit by the impact component and broken, and the broken pure copper is thrown onto the collision plate under the action of centrifugal force and further broken to a particle size of less than or equal to 5 mm, so that the broken pure copper particles are more uniform, which is beneficial to the subsequent oxidation treatment. By setting a rotating furnace body and spirally setting a number of stirring blades on the inner wall of the furnace body, the copper particles are evenly distributed, and the particles are heated more evenly, so that they can fully contact with the working gas in the furnace body to complete the oxidation reaction;

[0032] (2) By adopting this oxidation process, the pure copper obtained from aeration separation is first crushed. The crushed pure copper particles are more uniform, which increases the contact area between copper and the working gas and is beneficial to the subsequent oxidation treatment. The oxidation furnace is then preheated to ensure a stable oxidation environment in the furnace. The crushed pure copper particles are evenly loaded into the furnace body. With the cooperation of stirring blades, the copper particles are evenly distributed and the particles are heated more evenly to improve the oxidation efficiency. The oxidation treatment is carried out under this parameter to ensure that the pure copper particles are fully in contact with the working gas, so that the oxidation time is reduced from 8h to 4h, and the processing energy consumption is reduced from 800kWh to 400kWh, and the energy consumption is reduced by about 50%; the purity of copper oxide is increased from 95% to 99%, which has the advantages of low energy consumption, high oxidation efficiency and high purity of copper oxide.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a structural schematic diagram of the oxidation furnace device of the present invention;

[0036] Figure 2 yes Figure 1 A top view of

[0037] Figure 3 yes Figure 2 Sectional view at AA in the middle;

[0038] Figure 4 yes Figure 1 Left view of .

[0039] In the figure:

[0040] 1. Crusher assembly; 2. Oxidation furnace assembly; 3. Cooling table assembly; 4. Furnace body; 5. First drive mechanism; 6. Air inlet pipe; 7. Stirring blade; 8. Valve; 9. Crushing chamber; 10. Rotor; 11. Impact component; 12. Crushing chamber; 13. Impact plate; 14. First drive motor; 15. First driving wheel; 16. First driven wheel; 17. First connecting shaft; 18. First belt; 19. Support base; 20. First bearing seat; 21 , feed port; 22, discharge port; 23, second drive motor; 24, second driving wheel; 25, second passive wheel; 26, second connecting shaft; 27, second belt; 28, second bearing seat; 29, bracket; 30, blanking bin; 31, screening drum; 32, guide plate; 33, conveyor belt; 34, feed port; 35, blanking port; 36, third drive motor; 37, third bearing seat; 38, support frame; 39, conveyor roller; 40, conveyor belt. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all 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.

[0042] like Figures 1 to 4As shown, an oxidation furnace device for preparing copper oxide from recycled copper powder includes: a crusher assembly 1, an oxidation furnace assembly 2 and a cooling stage assembly 3, the oxidation furnace assembly 2 includes a furnace body 4, a first driving mechanism 5 and an air inlet pipe 6, the first driving mechanism 5 is used to drive the furnace body 4 to rotate, a plurality of stirring blades 7 are spirally arranged on the inner wall of the furnace body 4, a heater is arranged in the furnace body 4, a valve 8 for feeding and discharging is arranged on the side wall of the furnace body 4, at least a part of the crusher assembly 1 is located above the valve 8, at least a part of the cooling stage assembly 3 is located below the valve 8, and one end of the air inlet pipe 6 is connected to the furnace body 4;

[0043] The crusher assembly 1 includes a crushing chamber 9, a rotor 10 and an impact component 11. A crushing chamber 12 is formed in the crushing chamber 9. The rotor 10 is rotatably arranged in the crushing chamber 12. The impact component 11 is arranged on the rotor 10 and is used to collide with the material. A collision plate 13 is arranged in the crushing chamber 12. The collision plate 13 is configured on one side of the rotor 10. After colliding with the impact component 11, the material hits the collision plate 13.

[0044] It should be noted here that: the impact component 11 is driven to rotate by the rotation of the rotor 10, so that the pure copper is hit by the impact component 11 and broken, and the broken pure copper is thrown onto the collision plate 13 under the action of centrifugal force, and is further broken to a particle size less than or equal to 5 mm, so that the broken pure copper particles are more uniform, which is beneficial to the subsequent oxidation treatment; by setting a rotating furnace body 4 and spirally arranging a plurality of stirring blades 7 on the inner wall of the furnace body 4, it is ensured that the copper particles are evenly distributed, and the particles are heated more evenly, so that they can fully contact with the working gas in the furnace body 4 to complete the oxidation reaction.

[0045] The first driving mechanism 5 includes a first driving motor 14, a first driving wheel 15, a first driven wheel 16, a first connecting shaft 17 and a first belt 18. The first driving wheel 15 is arranged on the motor shaft of the first driving motor 14. The first driving wheel 15 and the first driven wheel 16 are driven by the first belt 18. The two ends of the first connecting shaft 17 are respectively connected to the first driven wheel 16 and the furnace body 4.

[0046] It should be noted here that: by providing the first drive motor 14 and the belt transmission, the furnace body 4 can rotate during the oxidation reaction, so that the pure copper particles in the furnace body 4 are heated more evenly.

[0047] The oxidation furnace assembly 2 also includes two supporting bases 19 and two first bearing seats 20. The two first bearing seats 20 are respectively arranged on the supporting bases 19 and located at both ends of the furnace body 4. The first connecting shaft 17 is installed on one of the first bearing seats 20 through a bearing, and the air inlet pipe 6 is installed on the other first bearing seat 20 through a bearing.

[0048] A feed inlet 21 is provided at the upper end of the crushing bin 9 , and a discharge outlet 22 is provided at the lower end of the crushing bin 9 .

[0049] The crusher assembly 1 also includes two second driving mechanisms and a screening and transporting assembly. The two second driving mechanisms are respectively located on both sides outside the crushing bin 9 and are connected to both ends of the rotor 10. The two driving mechanisms are used to drive the rotor 10 to rotate. The screening and transporting assembly is arranged below the discharge port 22 and is used to receive the crushed material. One end of the screening and transporting assembly extends to above the valve 8.

[0050] Each second driving mechanism includes a second driving motor 23, a second driving wheel 24, a second driven wheel 25, a second connecting shaft 26, a second belt 27 and a second bearing seat 28. The second driving wheel 24 is arranged on the motor shaft of the second driving motor 23. The second driving wheel 24 and the second driven wheel 25 are driven by the second belt 27. The two ends of the second connecting shaft 26 are respectively connected to the second driven wheel 25 and the rotor 10. The second bearing seat 28 is installed on the outer wall of the crushing bin 9, and the second connecting shaft 26 is installed on the second bearing seat 28 through a bearing.

[0051] It should be noted here that: by providing a second drive motor 23 and a belt drive, the rotor 10 can rotate at a high speed, so that a high-speed collision occurs between the impact component 11 and the pure copper material to crush the pure copper material, and the pure copper material that is not crushed thoroughly enough is thrown out by the centrifugal force and thrown onto the collision plate 13, and is further impacted and crushed.

[0052] The screening and transporting assembly includes a bracket 29, a feeding bin 30, a screening drum 31, a guide plate 32 and a conveyor belt 33. The feeding bin 30 is arranged above the bracket 29. An inlet 34 is provided at the upper end of the feeding bin 30, and the inlet 34 is connected to the discharge port 22. A feeding port 35 is provided at the lower end of the feeding bin 30. The screening drum 31 is obliquely installed on the bracket 29. One end of the screening drum 31 is connected to the feeding port 35. A plurality of sieve holes are provided on the side wall of the screening drum 31. The guide plate 32 is arranged on the other end of the screening drum 31. The guide plate 32 is arranged below the feeding port 35. The conveyor belt 33 is arranged on the bracket 29. One end of the conveyor belt 33 is located below the sieve holes of the screening drum 31, and the other end of the conveyor belt 33 extends to the top of the valve 8.

[0053] It should be noted here that the crushed pure copper particles fall into the drop bin 30, and are further screened by the screening cylinder 31 to ensure that the diameter of the pure copper particles entering the oxidation furnace is less than or equal to 5 mm, thereby improving the oxidation efficiency. Copper blocks larger than 5 mm continue to roll along the screening cylinder 31 to the guide plate 32, and are collected for secondary crushing.

[0054] A third drive motor 36 and a third bearing seat 37 are provided on the bracket 29. The motor shaft of the third drive motor 36 is connected to the other end of the screening drum 31. The third bearing seat 37 is installed on the bracket 29. The motor shaft of the third drive motor 36 is installed on the third bearing seat 37 through a bearing.

[0055] It should be noted here that the third driving motor 36 is provided to enable the screening drum 31 to rotate, thereby improving screening efficiency.

[0056] The cooling table assembly 3 includes a support frame 38 , a conveying roller 39 and a conveying belt 40 . The conveying roller 39 is rotatably mounted on the upper end of the support frame 38 . The conveying belt 40 is arranged on the outer side of the conveying roller 39 . The conveying belt 40 is located below the valve 8 .

[0057] It should be noted here that the conveyor belt 40 is arranged below the valve 8, so that the copper oxide after oxidation is completed can fall directly on the conveyor belt 40 for cooling. Through the cooperation of the conveyor roller 39 and the conveyor belt 40, the copper oxide cooled to room temperature can continue to be transported to the next process for collection or packaging.

[0058] An oxidation process, using the oxidation furnace device for preparing copper oxide from the recycled copper powder as described above to oxidize pure copper into copper oxide, wherein the process comprises the following steps:

[0059] Step S1, crushing treatment, start the second driving motor 23 to drive the second driving wheel 24 to rotate, the second driving wheel 24 and the second driven wheel 25 are driven by the second belt 27, so that the rotor 10 rotates, and then the impact component 11 installed on the rotor 10 rotates with the rotor 10, and the pure copper obtained from the aeration separation is put into the crushing chamber 12 of the crushing bin 9 from the feed port 21, and the pure copper is hit by the impact component 11 and crushed, and the crushed pure copper is thrown onto the collision plate 13 under the action of centrifugal force and further crushed, and the crushed copper blocks fall into the drop bin 30 from the discharge port 22, and then enter the screening drum 31 through the drop bin 30 The drop port 35 enters the screening drum 31, the sieve hole aperture on the screening drum 31 is 5mm, and the copper blocks less than or equal to 5mm pass through the sieve hole and fall on the conveyor belt 33, and the copper blocks larger than 5mm continue to roll along the screening drum 31 to the guide plate 32, and are collected for secondary crushing;

[0060] Step S2, preheating the oxidation furnace, connecting the heater to an external power source, turning on the heater, raising the temperature of the oxidation zone to within the range of 450°C to 550°C, and setting the heating rate to 5°C / min to 15°C / min;

[0061] Step S3, loading, opening the conveyor belt 33, transporting the copper blocks with a diameter of less than or equal to 5 mm obtained in step S1 to the oxidation furnace, opening the valve 8, and allowing the broken copper blocks to fall into the furnace body 4;

[0062] Step S4, oxidation treatment, the temperature of the oxidation zone is maintained in the range of 450°C to 550°C, oxygen or air is introduced into the furnace body 4 through the air inlet pipe 6, the air inlet flow rate is set to 1L / min to 3L / min, and at the same time, the first driving motor 14 is turned on to drive the first driving wheel 15 to rotate, the first driving wheel 15 and the first driven wheel 16 are driven by the first belt 18, so that the furnace body 4 rotates, and the copper block in the furnace body 4 is stirred by the stirring blade 7 as it rotates;

[0063] Step S5, the discharged material is cooled, and after the oxidation reaction is completed, the first drive motor 14 is turned off, and the valve 8 is opened, and the copper oxide after the oxidation in step S4 falls from the valve 8 onto the conveyor belt 40;

[0064] Step S6, cooling and collecting, after the copper oxide on the conveyor belt 40 cools to room temperature, it is collected and packaged.

[0065] It should be noted here that: using this oxidation process step, the pure copper obtained from the aeration separation is first crushed, and the crushed pure copper particles are more uniform, which increases the contact area between copper and the working gas, which is beneficial to the subsequent oxidation treatment. The oxidation furnace is then preheated to ensure that a stable oxidation environment is achieved in the furnace. The crushed pure copper particles are evenly loaded into the furnace body 4. With the cooperation of the stirring blades 7, the copper particles are evenly distributed and the particles are heated more evenly to improve the oxidation efficiency. The oxidation treatment is carried out under this parameter to ensure that the pure copper particles are fully in contact with the working gas, so that the oxidation time is reduced from 8h to 4h, and the processing energy consumption is reduced from 800kWh to 400kWh, and the energy consumption is reduced by about 50%; the purity of copper oxide is increased from 95% to 99%, which has the advantages of low energy consumption, high oxidation efficiency and high purity of copper oxide.

[0066] Example 1: Investigation of oxidation temperature

[0067] Oxidation temperature: 450℃

[0068] Oxidation time: 4 hours

[0069] Oxygen concentration: 100% (pure oxygen)

[0070] Oxidizing atmosphere: pure oxygen atmosphere

[0071] Heating rate: 10℃ / min

[0072] Cooling rate: natural cooling

[0073] Air flow rate: 2L / min

[0074] Results: Copper oxide purity 95%, energy consumption 375kWh, oxygen consumption 0.12m 3 / h.

[0075] Example 2: Investigation of oxidation temperature

[0076] Oxidation temperature: 500℃

[0077] Oxidation time: 4 hours

[0078] Oxygen concentration: 100% (pure oxygen)

[0079] Oxidizing atmosphere: pure oxygen atmosphere

[0080] Heating rate: 10℃ / min

[0081] Cooling rate: natural cooling

[0082] Air flow rate: 2L / min

[0083] Results: Copper oxide purity 99%, energy consumption 400kWh, oxygen consumption 0.12m 3 / h.

[0084] Example 3: Investigation of oxidation temperature

[0085] Oxidation temperature: 550℃

[0086] Oxidation time: 4 hours

[0087] Oxygen concentration: 100% (pure oxygen)

[0088] Oxidizing atmosphere: pure oxygen atmosphere

[0089] Heating rate: 10℃ / min

[0090] Cooling rate: natural cooling

[0091] Air flow rate: 2L / min

[0092] Results: Copper oxide purity 98%, energy consumption 425kWh, oxygen consumption 0.12m 3 / h.

[0093] From Examples 1 to 3, it can be seen that when other parameters are the same, the oxidation temperature is 500° C., and the best effect is achieved.

[0094] Example 4: Investigation of oxidation time

[0095] Oxidation temperature: 500℃

[0096] Oxidation time: 2 hours

[0097] Oxygen concentration: 100% (pure oxygen)

[0098] Oxidizing atmosphere: pure oxygen atmosphere

[0099] Heating rate: 10℃ / min

[0100] Cooling rate: natural cooling

[0101] Air flow rate: 2L / min

[0102] Results: Copper oxide purity 96%, energy consumption 350kWh, oxygen consumption 0.12m 3 / h.

[0103] Example 5: Investigation of oxidation time

[0104] Oxidation temperature: 500℃

[0105] Oxidation time: 6 hours

[0106] Oxygen concentration: 100% (pure oxygen)

[0107] Oxidizing atmosphere: pure oxygen atmosphere

[0108] Heating rate: 10℃ / min

[0109] Cooling rate: natural cooling

[0110] Air flow rate: 2L / min

[0111] Results: Copper oxide purity 99.5%, energy consumption 450kWh, oxygen consumption 0.12m 3 / h.

[0112] From Example 2, Example 4 and Example 5, it can be concluded that when other parameters are the same, the best effect is achieved when the oxidation time is 4 hours.

[0113] Example 6: Investigation of oxygen concentration

[0114] Oxidation temperature: 500℃

[0115] Oxidation time: 4 hours

[0116] Oxygen concentration: 21%

[0117] Oxidizing atmosphere: air atmosphere

[0118] Heating rate: 10℃ / min

[0119] Cooling rate: natural cooling

[0120] Air flow rate: 2L / min

[0121] Results: Copper oxide purity 90%, energy consumption 350kWh, oxygen consumption 0.0252m 3 / h.

[0122] Example 7: Investigation of oxygen concentration

[0123] Oxidation temperature: 500℃

[0124] Oxidation time: 4 hours

[0125] Oxygen concentration: 50%

[0126] Oxidizing atmosphere: oxygen / air mixed atmosphere

[0127] Heating rate: 10℃ / min

[0128] Cooling rate: natural cooling

[0129] Air flow rate: 2L / min

[0130] Results: Copper oxide purity 95%, energy consumption 375kWh, oxygen consumption 0.06m 3 / h.

[0131] From Example 2, Example 6 and Example 7, it can be concluded that when other parameters are the same, the best effect is achieved when the oxidation concentration is 100%.

[0132] Example 8: Investigation of oxidizing atmosphere

[0133] Oxidation temperature: 500℃

[0134] Oxidation time: 4 hours

[0135] Oxygen concentration: 80%

[0136] Oxidizing atmosphere: 80% oxygen + 20% inert gas (such as nitrogen or argon)

[0137] Heating rate: 10℃ / min

[0138] Cooling rate: natural cooling

[0139] Air flow rate: 2L / min

[0140] Results: Copper oxide purity 97%, energy consumption 400kWh, oxygen consumption 0.096m 3 / h.

[0141] From Example 2, Example 6 and Example 8, it can be concluded that when other parameters are the same, the oxidation atmosphere is pure oxygen atmosphere, and the best effect is achieved.

[0142] Example 9: Investigating the heating rate

[0143] Oxidation temperature: 500℃

[0144] Oxidation time: 4 hours

[0145] Oxygen concentration: 100% (pure oxygen)

[0146] Oxidizing atmosphere: pure oxygen atmosphere

[0147] Heating rate: 5℃ / min

[0148] Cooling rate: natural cooling

[0149] Air flow rate: 2L / min

[0150] Results: Copper oxide purity 98%, energy consumption 380kWh, oxygen consumption 0.12m 3 / h.

[0151] Example 10: Investigating the heating rate

[0152] Oxidation temperature: 500℃

[0153] Oxidation time: 4 hours

[0154] Oxygen concentration: 100% (pure oxygen)

[0155] Oxidizing atmosphere: pure oxygen atmosphere

[0156] Heating rate: 15℃ / min

[0157] Cooling rate: natural cooling

[0158] Air flow rate: 2L / min

[0159] Results: Copper oxide purity 97.5%, energy consumption 420kWh, oxygen consumption 0.12m 3 / h.

[0160] From Example 2, Example 9 and Example 10, it can be concluded that when other parameters are the same, the best effect is achieved when the heating rate is 10° C. / min.

[0161] Example 11: Examining the Cooling Rate

[0162] Oxidation temperature: 500℃

[0163] Oxidation time: 4 hours

[0164] Oxygen concentration: 100% (pure oxygen)

[0165] Oxidizing atmosphere: pure oxygen atmosphere

[0166] Heating rate: 10℃ / min

[0167] Cooling rate: controlled cooling

[0168] Air flow rate: 2L / min

[0169] Results: Copper oxide purity 98.5%, energy consumption 410kWh, oxygen consumption 0.12m 3 / h.

[0170] Example 12: Examining the Cooling Rate

[0171] Oxidation temperature: 500℃

[0172] Oxidation time: 4 hours

[0173] Oxygen concentration: 100% (pure oxygen)

[0174] Oxidizing atmosphere: pure oxygen atmosphere

[0175] Heating rate: 10℃ / min

[0176] Cooling rate: fast cooling

[0177] Air flow rate: 2L / min

[0178] Results: Copper oxide purity 96%, energy consumption 420kWh, oxygen consumption 0.12m 3 / h.

[0179] From Example 2, Example 11 and Example 12, it can be concluded that when other parameters are the same, the cooling rate is best when it is natural cooling.

[0180] Example 13: Investigation of air flow rate

[0181] Oxidation temperature: 500℃

[0182] Oxidation time: 4 hours

[0183] Oxygen concentration: 100% (pure oxygen)

[0184] Oxidizing atmosphere: pure oxygen atmosphere

[0185] Heating rate: 10℃ / min

[0186] Cooling rate: natural cooling

[0187] Air flow rate: 1L / min

[0188] Results: Copper oxide purity 97%, energy consumption 390kWh, oxygen consumption 0.06m 3 / h.

[0189] Example 14: Investigation of air flow rate

[0190] Oxidation temperature: 500℃

[0191] Oxidation time: 4 hours

[0192] Oxygen concentration: 100% (pure oxygen)

[0193] Oxidizing atmosphere: pure oxygen atmosphere

[0194] Heating rate: 10℃ / min

[0195] Cooling rate: natural cooling

[0196] Air flow rate: 3L / min

[0197] Results: Copper oxide purity 98.5%, energy consumption 410kWh, oxygen consumption 0.18m 3 / h.

[0198] From Example 2, Example 13 and Example 14, it can be concluded that when other parameters are the same, the best effect is achieved when the air flow rate is 2 L / min.

[0199] Therefore, the best effect is achieved when the process parameters of the oxidation furnace are selected from Examples 1 to 14:

[0200] Oxidation temperature: The best effect is achieved at 500°C.

[0201] Oxidation time: 4 hours is the best time.

[0202] Oxygen concentration: 100% pure oxygen atmosphere is best.

[0203] Oxidizing atmosphere: Pure oxygen atmosphere works best.

[0204] Heating rate: 10℃ / min has the best effect.

[0205] Cooling rate: Natural cooling is the best.

[0206] Air flow rate: 2L / min is the best.

[0207] The results of the optimal process parameters are: copper oxide purity 99%, energy consumption 400kWh, oxygen consumption 0.12m 3 / h.

[0208] In summary, the beneficial effects of the present invention are:

[0209] (1) The rotor 10 rotates to drive the impact component 11 to rotate together, so that the pure copper is hit by the impact component 11 and broken, and the broken pure copper is thrown onto the collision plate 13 under the action of centrifugal force and is further broken to a particle size of less than or equal to 5 mm, so that the broken pure copper particles are more uniform, which is beneficial to the subsequent oxidation treatment. By setting a rotating furnace body 4 and spirally setting a plurality of stirring blades 7 on the inner wall of the furnace body 4, it is ensured that the copper particles are evenly distributed, and the particles are heated more evenly, so that they can fully contact with the working gas in the furnace body 4 to complete the oxidation reaction;

[0210] (2) By adopting this oxidation process, the pure copper obtained from the aeration separation is first crushed. The crushed pure copper particles are more uniform, which increases the contact area between copper and the working gas and is beneficial to the subsequent oxidation treatment. Then, the oxidation furnace is preheated to ensure that a stable oxidation environment is achieved in the furnace. The crushed pure copper particles are evenly loaded into the furnace body 4. With the cooperation of the stirring blade 7, the copper particles are evenly distributed and the particles are heated more evenly to improve the oxidation efficiency. The oxidation treatment is carried out under this parameter to ensure that the pure copper particles are fully in contact with the working gas, so that the oxidation time is reduced from 8h to 4h, and the processing energy consumption is reduced from 800kWh to 400kWh, and the energy consumption is reduced by about 50%; the purity of copper oxide is increased from 95% to 99%, which has the advantages of low energy consumption, high oxidation efficiency and high purity of copper oxide.

[0211] The various devices selected in this application are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0212] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0213] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0214] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An oxidation furnace device for preparing copper oxide from recycled copper powder, characterized in that: include: A crusher assembly (1), an oxidation furnace assembly (2) and a cooling table assembly (3), wherein the oxidation furnace assembly (2) comprises a furnace body (4), a first driving mechanism (5) and an air inlet pipe (6), wherein the first driving mechanism (5) is used to drive the furnace body (4) to rotate, a plurality of stirring blades (7) are spirally arranged on the inner wall of the furnace body (4), a heater is arranged inside the furnace body (4), a valve (8) for feeding and discharging is arranged on the side wall of the furnace body (4), at least a part of the crusher assembly (1) is located above the valve (8), at least a part of the cooling table assembly (3) is located below the valve (8), and one end of the air inlet pipe (6) is connected to the furnace body (4); The crusher assembly (1) comprises a crushing chamber (9), a rotor (10) and an impact component (11); a crushing chamber (12) is formed in the crushing chamber (9); the rotor (10) is rotatably arranged in the crushing chamber (12); the impact component (11) is arranged on the rotor (10) and is used to collide with materials; a collision plate (13) is arranged in the crushing chamber (12); the collision plate (13) is arranged on one side of the rotor (10); and the materials collide with the collision plate (13) after colliding with the impact component (11).

2. The oxidation furnace device for preparing copper oxide from recycled copper powder as claimed in claim 1, characterized in that: The first driving mechanism (5) comprises a first driving motor (14), a first driving wheel (15), a first driven wheel (16), a first connecting shaft (17) and a first belt (18); the first driving wheel (15) is arranged on the motor shaft of the first driving motor (14); the first driving wheel (15) and the first driven wheel (16) are driven by the first belt (18); and the two ends of the first connecting shaft (17) are respectively connected to the first driven wheel (16) and the furnace body (4).

3. The oxidation furnace device for preparing copper oxide from recycled copper powder as claimed in claim 2, characterized in that: The oxidation furnace assembly (2) further comprises two supporting bases (19) and two first bearing seats (20), wherein the two first bearing seats (20) are respectively arranged on the supporting bases (19) and located at two ends of the furnace body (4), the first connecting shaft (17) is mounted on one of the first bearing seats (20) via a bearing, and the air inlet pipe (6) is mounted on the other first bearing seat (20) via a bearing.

4. The oxidation furnace device for preparing copper oxide from recycled copper powder as claimed in claim 1, characterized in that: The upper end of the crushing bin (9) is provided with a feed inlet (21), and the lower end of the crushing bin (9) is provided with a discharge outlet (22).

5. The oxidation furnace device for preparing copper oxide from recycled copper powder as claimed in claim 4, characterized in that: The crusher assembly (1) further comprises two second drive mechanisms and a screening and transport assembly, wherein the two second drive mechanisms are respectively located on two sides outside the crushing bin (9) and connected to two ends of the rotor (10), and the two drive mechanisms are used to drive the rotor (10) to rotate. The screening and transport assembly is arranged below the discharge port (22) and is used to receive the crushed material, and one end of the screening and transport assembly extends to above the valve (8).

6. The oxidation furnace device for preparing copper oxide from recycled copper powder as claimed in claim 5, characterized in that: Each of the second driving mechanisms comprises a second driving motor (23), a second driving wheel (24), a second driven wheel (25), a second connecting shaft (26), a second belt (27) and a second bearing seat (28); the second driving wheel (24) is arranged on the motor shaft of the second driving motor (23); the second driving wheel (24) and the second driven wheel (25) are driven by the second belt (27); the two ends of the second connecting shaft (26) are respectively connected to the second driven wheel (25) and the rotor (10); the second bearing seat (28) is installed on the outer wall of the crushing bin (9); and the second connecting shaft (26) is installed on the second bearing seat (28) through a bearing.

7. The oxidation furnace device for preparing copper oxide from recycled copper powder as claimed in claim 5, characterized in that: The screening and transporting assembly comprises a support (29), a material drop bin (30), a screening drum (31), a guide plate (32) and a conveying belt (33); the material drop bin (30) is arranged above the support (29); an inlet (34) is provided at the upper end of the material drop bin (30); the inlet (34) is communicated with the discharge port (22); a material drop port (35) is provided at the lower end of the material drop bin (30); the screening drum (31) is obliquely mounted on the support (29); the screening drum (31) is provided with a guide plate (32) and a conveying belt (33); One end of the sieve drum (31) is connected to the material outlet (35), a plurality of sieve holes are provided on the side wall of the sieve drum (31), the guide plate (32) is arranged on the other end of the sieve drum (31), the guide plate (32) is arranged below the material outlet (35), the conveyor belt (33) is arranged on the bracket (29), one end of the conveyor belt (33) is located below the sieve holes of the sieve drum (31), and the other end of the conveyor belt (33) extends to above the valve (8).

8. The oxidation furnace device for preparing copper oxide from recycled copper powder as claimed in claim 7, characterized in that: A third drive motor (36) and a third bearing seat (37) are provided on the bracket (29); a motor shaft of the third drive motor (36) is connected to the other end of the screening drum (31); the third bearing seat (37) is mounted on the bracket (29); and a motor shaft of the third drive motor (36) is mounted on the third bearing seat (37) via a bearing.

9. The oxidation furnace device for preparing copper oxide from recycled copper powder as claimed in claim 1, characterized in that: The cooling table assembly (3) includes a support frame (38), a conveying roller (39) and a conveying belt (40), wherein the conveying roller (39) is rotatably mounted on the upper end of the support frame (38), and the conveying belt (40) is arranged on the outer side of the conveying roller (39), and the conveying belt (40) is located below the valve (8).

10. An oxidation process, wherein pure copper is oxidized into copper oxide using an oxidation furnace device for preparing copper oxide from recycled copper powder as described in claims 1 to 9, characterized in that: The steps include: Step S1, crushing treatment, the second driving motor (23) is turned on to drive the second driving wheel (24) to rotate, the second driving wheel (24) and the second driven wheel (25) are driven by the second belt (27), so that the rotor (10) rotates, and then the impact component (11) installed on the rotor (10) rotates along with the rotor (10), and the pure copper obtained from the aeration separation is put into the crushing chamber (12) of the crushing bin (9) from the feed port (21), and the pure copper is hit by the impact component (11) and crushed, and after crushing The pure copper is thrown onto the collision plate (13) under the action of centrifugal force and is further crushed. The crushed copper blocks fall into the drop bin (30) from the discharge port (22) and then enter the screening cylinder (31) through the drop port (35) of the drop bin (30). The screen holes on the screening cylinder (31) have a diameter of 5 mm. Copper blocks with a diameter less than or equal to 5 mm pass through the screen holes and fall onto the conveyor belt (33). Copper blocks with a diameter greater than 5 mm continue to roll along the screening cylinder (31) and fall onto the guide plate (32) and are collected for secondary crushing. Step S2, preheating the oxidation furnace, connecting the heater to an external power source, turning on the heater, raising the temperature of the oxidation zone to within the range of 450°C to 550°C, and setting the heating rate to 5°C / min to 15°C / min; Step S3, loading, opening the conveyor belt (33), transporting the copper blocks with a size of less than or equal to 5 mm obtained in step S1 to the oxidation furnace, opening the valve (8), and allowing the crushed copper blocks to fall into the furnace body (4); Step S4, oxidation treatment, the temperature of the oxidation zone is maintained in the range of 450°C to 550°C, oxygen or air is introduced into the furnace body (4) through the air intake pipe (6), the air intake flow rate is set to 1L / min to 3L / min, and at the same time, the first driving motor (14) is turned on to drive the first driving wheel (15) to rotate, the first driving wheel (15) and the first driven wheel (16) are driven by the first belt (18), so that the furnace body (4) rotates, and the copper block in the furnace body (4) is stirred by the stirring blade (7) as it rotates; Step S5, cooling the discharged material, after the oxidation reaction is completed, turning off the first drive motor (14), opening the valve (8), and the copper oxide after the oxidation in step S4 falls from the valve (8) onto the conveyor belt (40); Step S6, cooling and collecting, after the copper oxide on the conveyor belt (40) cools to room temperature, it is collected and packaged.

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