A tungsten alloy waste separation device and a tungsten alloy waste recycling method

Abstract

The present invention relates to a tungsten alloy waste separation device and a method for recycling tungsten alloy waste. The technical problem to be solved by the present invention is to provide a tungsten alloy waste separation device and a method for recycling tungsten alloy waste. The technical solution adopted by the present invention for tungsten includes a support frame, a drum drive device, and a drum assembly. The drum assembly includes an inner drum, a settling box door, an electromagnet group, an upper part of the outer drum and a lower part of the outer drum, a drum end cover assembly, and tungsten balls. The inner drum includes an inner drum cylinder body and inner drum ends, and an inner drum cavity is provided inside the inner drum. The advantages of the present invention are as follows: while ball-milling tungsten alloy waste, nickel powder, iron powder, and cobalt powder in the tungsten alloy waste can be recycled and separated multiple times to obtain relatively pure tungsten powder and copper powder, and then new nickel powder, iron powder, and cobalt powder are added according to a ratio so that the recycled tungsten alloy waste can reach high performance after being remanufactured.

Description

Technical Field

[0001] The present invention relates to a tungsten alloy waste separation device and a method for recycling tungsten alloy waste. Background Art

[0002] The mobile phone vibrator is made of an alloy based on tungsten (with a tungsten content of 85% - 99%) and added with a small amount of Ni (nickel), Cu, Fe, and Co (cobalt) elements as the binder phase. The tungsten alloy referred to in this solution is an alloy of tungsten, nickel, copper, iron, and cobalt element binder phase. During the production process of tungsten alloy, many tungsten alloy wastes and recycled tungsten alloy wastes are generated. In order to improve the recycling efficiency of waste, reduce costs, and reduce the risk of environmental pollution, the oxidation-reduction method is used to recycle tungsten alloy waste. Utilizing the poor antioxidant properties of tungsten and the binder phase, the small tungsten alloy products are oxidized into metal oxide powder state at high temperature in sufficient air, and then the oxide powder is reduced to the original metal powder state of tungsten alloy in a reducing atmosphere at a certain temperature. After ball milling, it is re-introduced into production according to the powder metallurgy production method. However, due to problems such as the loss of Ni (nickel), Fe (iron), and Co (cobalt) elements added in the existing tungsten alloy waste during the bonding process, loss during use, and reduction of properties after oxidation-reduction, after oxidation-reduction, their proportion in the tungsten alloy is seriously out of balance, and the properties are also weakened and lost. The subsequent ball milling and re-introduction into production have a greater impact on the performance of the newly produced tungsten alloy finished product. Considering factors such as cost, it is generally sold as defective products on the market, and the price is not high. Improvements and optimizations are made for this problem. Summary of the Invention

[0003] To solve the above problems, the technical problem to be solved by the present invention is to provide a tungsten alloy waste separation device and a method for recycling tungsten alloy waste.

[0004] The technical solution adopted by the method for recycling tungsten alloy waste of the present invention is characterized by including the following steps:

[0005] Step 1: Put the recycled tungsten alloy waste into an ultrasonic cleaning device. The tungsten alloy waste is based on tungsten and added with a small amount of nickel, copper, iron, and cobalt elements as the binder phase. Then put the cleaned tungsten alloy waste in a drying oven for drying to obtain a tungsten alloy waste with a clean surface;

[0006] Step 2: Introduce compressed air at 0.1 - 0.7 MPa into the reduction furnace without introducing hydrogen. The furnace temperature of the reduction furnace is 700 - 900 °C. Put the tungsten alloy waste with a clean surface into a stainless steel boat and push one boat every 10 - 60 minutes. Oxidize the tungsten alloy waste to obtain powdery oxides;

[0007] Step 3: Push the oxidized powdered oxide into a three-stage reduction furnace with hydrogen introduced. The temperature of the first stage is 450 - 550 °C, the temperature of the second stage is 500 - 650 °C, and the temperature of the third stage is 600 - 850 °C. Push the powdered oxide into a boat every 30 - 80 minutes to obtain a once-reduced metal mixed powder;

[0008] Step 4: Push the once-reduced metal mixed powder into a three-stage reduction furnace with hydrogen introduced. The temperature of the first stage is 650 - 750 °C, the temperature of the second stage is 700 - 850 °C, and the temperature of the third stage is 700 - 900 °C. Push the once-reduced metal mixed powder into a boat every 10 - 50 minutes to obtain a twice-reduced metal mixed powder;

[0009] Step 5: Add the twice-reduced metal mixed powder into a tungsten alloy waste separation device, perform ball milling and mixing for 10 - 36 hours, separate the unnecessary nickel powder, iron powder, and cobalt powder, obtain a tungsten-copper mixture with tungsten powder and copper powder mixed together, then pass the ball-milled tungsten-copper mixture through a 100 - 300 mesh sieve to obtain the undersize material, and add new nickel powder, iron powder, and cobalt powder according to the ratio to obtain a new tungsten alloy powder;

[0010] The tungsten alloy waste separation device includes a support frame, a drum drive device provided on the support frame, and a drum assembly rotatably provided on the support frame. The drum assembly includes an inner drum, a settling tank door, an electromagnet group wrapped outside the inner drum, an upper outer drum and a lower outer drum sleeved outside the electromagnet group, a drum end cover assembly, and a plurality of tungsten balls with different diameters. The inner drum includes an inner drum body and inner drum ends. An inner drum cavity for placing tungsten alloy waste and the tungsten balls is provided inside the inner drum. A symmetrically arranged settling tank is provided in the middle of the inner drum body. A settling cavity communicating with the inner drum cavity is provided in the settling tank. A ball blocking plate is provided in the settling cavity. The ball blocking plate is provided with settling holes with diameters smaller than the minimum diameter of the tungsten balls at intervals. Box door limit openings are provided on both sides of the settling tank. The settling tank door can rotatably open or close the settling cavity through the box door limit openings;

[0011] The electromagnet group is composed of a plurality of electromagnet blocks attached to the outer wall of the inner drum and connected in parallel. The electromagnet group is used to adsorb nickel, iron, and cobalt elements in the tungsten alloy waste. An inner drum feeding part is provided at the inner drum end. A feeding hole is provided on the inner drum feeding part.

[0012] Inner retaining edges are provided on the outer wall of the inner drum body at the upper and lower ends of the settling tank. The settling tank door is of an arc structure and includes a box door opening part and a box door closing part. Settling tank door limit posts are provided at the upper and lower ends of the settling tank door. Inner retaining edge guiding openings for limiting the movement of the settling tank door limit posts are provided on the inner retaining edges.

[0013] The left and right sides of the material sinking box door are provided with box door lock holes. Between the two inner edges, there is an inner roller side block arranged longitudinally and used for limiting the side part of the material sinking box door. The inner roller side block is provided with a box door fastening hole corresponding to the box door lock hole.

[0014] Both the upper part and the lower part outer wall of the outer roller are provided with outer edges. There are two parallel U-shaped receiving frames arranged on the support frame. The two ends of the U-shaped receiving frame are provided with auxiliary rollers arranged in a rolling manner. The auxiliary rollers are placed between the outer edge and the inner edge.

[0015] The roller transmission device includes a rolling motor placed on the support frame, a main transmission wheel assembly and an auxiliary transmission wheel assembly that are rollably penetrated through the middle of the U-shaped receiving frame. The rolling motor drives the main transmission wheel assembly to rotate through belt transmission. Both the main transmission wheel assembly and the auxiliary transmission wheel assembly correspond to the outer edge. The main transmission wheel assembly drives the roller assembly to rotate through the outer edge.

[0016] The roller end cover assembly includes a roller end cover, an end cover reinforcement plate, and a tightening handle connecting the end cover reinforcement plate and the roller end cover. The upper end face of the outer roller is provided with an outer roller through hole for the inner roller feeding part to penetrate. On both sides of the outer roller through hole on the upper part of the outer roller, there are reinforcement plate limit seats. The reinforcement plate limit seats are provided with reinforcement plate limit openings for the end cover reinforcement plate to penetrate.

[0017] The advantages of the tungsten alloy waste separation device and the tungsten alloy waste recycling method of the present invention are as follows: while ball-milling tungsten alloy waste, nickel powder, iron powder, and cobalt powder in the tungsten alloy waste can be recycled and separated multiple times to obtain relatively pure tungsten powder and copper powder. Then, by adding new nickel powder, iron powder, and cobalt powder according to a ratio, the recycled tungsten alloy waste can reach high performance after being remanufactured, which is convenient for sales. The tungsten alloy waste separation device has low requirements for equipment and small pollution, improves the efficiency and time cycle of the entire recycling process, and greatly reduces the cost of recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following further describes the present invention in detail with reference to the drawings and specific embodiments.

[0019] Figure 1 is a schematic structural diagram of the tungsten alloy waste separation device of the present invention;

[0020] Figure 2 is an exploded view of the roller assembly of the present invention;

[0021] Figure 3 is a schematic structural diagram of the inner roller of the present invention;

[0022] Figure 4 It is a half-sectional view of the inner drum of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the electromagnet group of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the sediment box door of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the upper part of the outer drum of the present invention;

[0026] Figure 8 It is a structural schematic diagram of the support frame of the present invention;

[0027] Figure 9 It is a structural schematic diagram of the drum transmission device of the present invention;

[0028] Figure 10 It is a structural schematic diagram of the drum end cover assembly of the present invention. Detailed implementation manners

[0029] Such as Figure 1-10As shown in the figure, the tungsten alloy waste separation device involved in the present invention includes a support frame 1, a drum drive device 2 provided on the support frame 1, and a drum assembly 3 rotatably provided on the support frame 1. The drum assembly 3 includes an inner drum 5, a sediment box door 6, an electromagnet group 7 wrapped outside the inner drum 5, an upper outer drum 8 and a lower outer drum 9 sleeved outside the electromagnet group 7, a drum end cover assembly 10, and a plurality of tungsten balls 11 with different diameters. The inner drum 5 includes an inner drum cylinder body 14 and an inner drum end 15. An inner drum cavity 16 for placing tungsten alloy waste and the tungsten balls 11 is provided inside the inner drum 5. A sediment box 17 is symmetrically provided in the middle of the inner drum cylinder body 14. A sediment cavity 18 communicating with the inner drum cavity 16 is provided in the sediment box 17. A ball blocking plate 19 is provided in the sediment cavity 18. Sediment holes 20 with diameters smaller than the minimum diameter of the tungsten balls 11 are spaced on the ball blocking plate 19. The ball blocking plate 19 can effectively prevent the tungsten balls 11 from entering the sediment cavity 18. Box door limit openings 22 are provided on both sides of the sediment box 17. The sediment box door 6 can rotatably open or close the sediment cavity 18 through the box door limit openings 22. The electromagnet group 7 is composed of a plurality of electromagnet blocks 24 attached to the outer wall of the inner drum 5 and connected in parallel. The electromagnet group 7 is used to adsorb nickel, iron, and cobalt elements in the tungsten alloy waste. An inner drum feeding part 25 is provided at the inner drum end 15. A feeding hole 26 is provided on the inner drum feeding part 25. The tungsten alloy waste (including tungsten powder, copper powder, nickel powder, iron powder, and cobalt powder) after the redox reaction is ball-milled by driving the internal tungsten balls 11 when the drum assembly rolls, so that the tungsten alloy waste becomes finer. The electromagnet group 7 is energized to generate a magnetic force to adsorb nickel powder, iron powder, and cobalt powder in the tungsten alloy waste. Adsorbing during the ball-milling process makes the separation of nickel powder, iron powder, and cobalt powder more uniform and sufficient. Then the sediment box door 6 is opened so that the tungsten powder and copper powder in the unadsorbed tungsten alloy waste can all enter the sediment box 17. The sediment box door 6 is closed, and the electromagnet group 7 is powered off. At this time, the nickel powder, iron powder, and cobalt powder fall off. The suction device (conventional equipment such as a vacuum cleaner, not described in detail here) sucks out the nickel powder, iron powder, and cobalt powder in the inner drum cavity 16 through the feeding hole 26. Repeat the above operations several times, and finally all the nickel powder, iron powder, and cobalt powder in the tungsten alloy waste are sucked out. At this time, pure tungsten powder and copper powder are obtained. Subsequently, new nickel powder, iron powder, and cobalt powder are added according to the proportional relationship, and a high-performance tungsten alloy product can be obtained after remanufacture. The tungsten alloy waste separation device has low requirements for equipment and low pollution, improves the efficiency and time cycle of the entire recycling and reuse, and greatly reduces the cost of recycling and reuse.

[0030] On the outer wall of the inner drum cylinder body 14, inner retaining edges 28 are provided at the upper and lower ends of the material settling box 17. The material settling box door 6 is of an arc structure and includes a box door opening part 32 and a box door closing part 33. At the upper and lower ends of the material settling box door 6, material settling box door limit posts 31 are provided. On the inner retaining edge 28, inner retaining edge guiding openings 29 for limiting the movement of the material settling box door limit posts 31 are provided. The material settling box door 6 can open and close the material settling box 17, with accurate guiding and stable and reliable operation.

[0031] On the left and right sides of the material settling box door 6, box door locking holes 35 are provided. Between the two inner retaining edges 28, an inner drum side retaining block 36 longitudinally arranged for limiting the side part of the material settling box door 6 is provided. On the inner drum side retaining block 36, box door fastening holes 37 corresponding to the box door locking holes 35 are provided to fasten the material settling box door 6 and prevent it from shifting due to the rotation of the drum assembly 3, so as to avoid leakage of the material settling box 17 and improve safety.

[0032] On the outer walls of both the upper part 8 and the lower part 9 of the outer drum, outer retaining edges 40 are provided. On the support frame 1, two parallel U-shaped receiving frames 41 are provided. At both ends of the U-shaped receiving frame 41, auxiliary rollers 42 arranged to roll are provided. The auxiliary rollers 42 are placed between the outer retaining edge 40 and the inner retaining edge 28. The drum transmission device 2 includes a rolling motor 44 placed on the support frame 1, a main transmission wheel assembly 45 and an auxiliary transmission wheel assembly 46 that are rollably passed through the middle of the U-shaped receiving frame 41. The rolling motor 44 drives the main transmission wheel assembly 45 to rotate through belt transmission. Both the main transmission wheel assembly 45 and the auxiliary transmission wheel assembly 46 correspond to the outer retaining edge 40. The main transmission wheel assembly 45 drives the drum assembly 3 to rotate through the outer retaining edge 40, with a compact structure and stable rotation.

[0033] The drum end cover assembly 10 includes a drum end cover 50, an end cover reinforcement plate 51, and a tightening handle 52 for connecting the end cover reinforcement plate 51 and the drum end cover 50. On the end face of the upper part 8 of the outer drum, an outer drum through hole for the inner drum material feeding part 25 to pass through is provided. On both sides of the outer drum through hole on the upper part 8 of the outer drum, reinforcement plate limit seats 54 are provided. In the reinforcement plate limit seats 54, reinforcement plate limit openings 55 for the end cover reinforcement plate 51 to pass through are provided.

[0034] A method for recycling and reusing tungsten alloy waste products includes the following steps:

[0035] Step 1: Put the recycled tungsten alloy waste products into an ultrasonic cleaning device. The tungsten alloy waste products are alloys based on tungsten and added with a small amount of nickel, copper, iron, and cobalt elements as the binder phase. Then, put the cleaned tungsten alloy waste products in a drying oven for drying to obtain tungsten alloy waste products with a clean surface.

[0036] Step 2: Without introducing hydrogen, introduce compressed air at 0.1 - 0.7 MPa into the reduction furnace. The temperature of the reduction furnace is 700 - 900 °C. Load the surface-cleaned tungsten alloy waste products into a stainless steel boat and push one boat in every 10 - 60 minutes. Oxidize the tungsten alloy waste products to obtain powdery oxides.

[0037] Step 3: Place the oxidized powdery oxides in a three-stage reduction furnace with hydrogen introduced. The temperature of the first stage is 450 - 550 °C, the temperature of the second stage is 500 - 650 °C, and the temperature of the third stage is 600 - 850 °C. Push the powdery oxides into the furnace one boat every 30 - 80 minutes to obtain the primary-reduced metal mixed powder.

[0038] Step 4: Place the primary-reduced metal mixed powder in a three-stage reduction furnace with hydrogen introduced. The temperature of the first stage is 650 - 750 °C, the temperature of the second stage is 700 - 850 °C, and the temperature of the third stage is 700 - 900 °C. Push the primary-reduced metal mixed powder into the furnace one boat every 10 - 50 minutes to obtain the secondary-reduced metal mixed powder.

[0039] Step 5: Add the secondary-reduced metal mixed powder to the above-mentioned tungsten alloy waste separation device, conduct ball milling and mixing for 10 - 36 hours. Then, energize the electromagnet group 7 to separate the unwanted nickel powder, iron powder, and cobalt powder, obtaining a tungsten-copper mixture with tungsten powder and copper powder mixed together. Next, pass the ball-milled tungsten-copper mixture through a 100 - 300 mesh sieve to obtain the undersize material, and add new nickel powder, iron powder, and cobalt powder according to the ratio to prepare a new tungsten alloy powder.

[0040] This method has a simple process, high economy, high reliability, a wide range of applications, a high utilization rate of tungsten alloy waste products, and does not produce any waste water, waste gas, etc., and will not cause environmental pollution.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention are all included in the protection scope of the present invention.

Claims

1. A method for recycling tungsten alloy waste, characterized in that: The following steps are involved: Step 1: Put the recycled tungsten alloy waste into the ultrasonic cleaning equipment. The tungsten alloy waste is based on tungsten and added with a small amount of nickel, copper, iron and cobalt elements as the bonding phase alloy. Then put the cleaned tungsten alloy waste in a drying box for drying to obtain tungsten alloy waste with clean surface; Step 2: Introduce 0.1-0.7MPa compressed air into the reduction furnace without hydrogen, the temperature of the reduction furnace is 700-900℃, put the surface-cleaned tungsten alloy waste into the stainless steel boat, push one boat into the boat every 10-60 minutes, and oxidize the tungsten alloy waste to obtain powdered oxide; Step 3: Put the oxidized powdered oxide into a three-stage reduction furnace with hydrogen, the temperature of the first stage is 450-550°C, the temperature of the second stage is 500-650°C, and the temperature of the third stage is 600-850°C, and the powdered oxide is pushed into a boat every 30-80 minutes to obtain a reduced metal mixed powder; Step 4: Put the metal mixed powder that has been reduced once into a three-stage reduction furnace into which hydrogen is introduced, with the temperature of the first stage being 650-750°C, the temperature of the second stage being 700-850°C, and the temperature of the third stage being 700-900°C, and push the metal mixed powder that has been reduced once into a boat every 10-50 minutes to obtain a secondary reduced metal mixed powder; Step 5: Add the metal mixed powder after secondary reduction to the tungsten alloy waste separation device, and perform ball milling and mixing for 10-36 hours to separate the unnecessary nickel powder, iron powder and cobalt powder to obtain a tungsten-copper mixture of tungsten powder and copper powder, and then pass the ball-milled tungsten-copper mixture through a 100-300 mesh sieve to obtain the undersize, and add new nickel powder, iron powder and cobalt powder according to the proportion to obtain new tungsten alloy powder; The tungsten alloy waste separation device comprises a support frame (1), a roller transmission device (2) arranged on the support frame (1), and a roller assembly (3) rotatably arranged on the support frame (1); the roller assembly (3) comprises an inner roller (5), a sinking box door (6), an electromagnet group (7) wrapped around the inner roller (5), an outer roller upper part (8) and an outer roller lower part (9) sleeved outside the electromagnet group (7), a roller end cover assembly (10), and a plurality of tungsten balls (11) of different diameters; the inner roller (5) comprises an inner roller body (14) and an inner roller end (15); and the inner roller (5) is provided with An inner drum cavity (16) for placing tungsten alloy waste and the tungsten ball (11), a symmetrically arranged sinking box (17) is provided in the middle of the inner drum body (14), a sinking cavity (18) communicating with the inner drum cavity (16) is provided in the sinking box (17), a ball baffle (19) is provided in the sinking cavity (18), sinking holes (20) having a diameter smaller than the minimum diameter of the tungsten ball (11) are provided on the ball baffle (19), box door limit openings (22) are provided on both sides of the sinking box (17), and the sinking box door (6) can be rotatably opened or closed through the box door limit openings (22); The electromagnet group (7) is composed of a plurality of electromagnet blocks (24) attached to the outer wall of the inner drum (5) and connected in parallel. The electromagnet group (7) is used to absorb nickel, iron and cobalt elements in the tungsten alloy waste. The inner drum end (15) is provided with an inner drum feeding portion (25), and the inner drum feeding portion (25) is provided with a feeding hole (26).

2. The method for recycling tungsten alloy waste according to claim 1, characterized in that: The outer wall of the inner drum body (14) is provided with inner retaining edges (28) at the upper and lower ends of the sinking box (17); the sinking box door (6) is an arc structure and includes a box door opening portion (32) and a box door closing portion (33); the sinking box door (6) is provided with sinking box door limiting columns (31) at the upper and lower ends; and the inner retaining edge (28) is provided with an inner retaining edge guide opening (29) for limiting the movement of the sinking box door limiting columns (31).

3. The method for recycling tungsten alloy waste according to claim 2, characterized in that: The left and right sides of the sinking box door (6) are provided with box door locking holes (35), and an inner drum side block (36) arranged longitudinally and used for limiting the side of the sinking box door (6) is provided between the two inner retaining edges (28). The inner drum side block (36) is provided with a box door fastening hole (37) corresponding to the box door locking hole (35).

4. The method for recycling tungsten alloy waste according to claim 2, characterized in that: The outer walls of the outer drum upper portion (8) and the outer drum lower portion (9) are both provided with outer retaining edges (40), the support frame (1) is provided with two parallel U-shaped receiving frames (41), both ends of the U-shaped receiving frames (41) are provided with auxiliary rollers (42) for rolling, and the auxiliary rollers (42) are placed between the outer retaining edges (40) and the inner retaining edges (28); The roller transmission device (2) comprises a rolling motor (44) disposed on the support frame (1), a main transmission wheel assembly (45) and an auxiliary transmission wheel assembly (46) rotatably disposed in the middle of the U-shaped receiving frame (41), the rolling motor (44) driving the main transmission wheel assembly (45) to rotate via a belt drive, the main transmission wheel assembly (45) and the auxiliary transmission wheel assembly (46) both correspond to the outer rib (40), and the main transmission wheel assembly (45) drives the roller assembly (3) to rotate via the outer rib (40).

5. The method for recycling tungsten alloy waste according to claim 1, characterized in that: The roller end cover assembly (10) comprises a roller end cover (50), an end cover reinforcement plate (51), and a tightening handle (52) for connecting the end cover reinforcement plate (51) and the roller end cover (50); an outer roller through hole for the inner roller material feeding portion (25) to pass through is provided on the end surface of the outer roller upper portion (8); reinforcement plate limiting seats (54) are provided on both sides of the outer roller through hole on the outer roller upper portion (8); and reinforcement plate limiting openings (55) for the end cover reinforcement plate (51) to pass through are provided in the reinforcement plate limiting seats (54).

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