Tungsten alloy wire recycling device and method and recycling

Abstract

The invention discloses a tungsten alloy wire recycling device and method and reutilization, the device sequentially comprises a first cleaning system, a first deplating and etching system, a second deplating and etching system, a second cleaning system and a drying system, the first cleaning system is used for cleaning a tungsten alloy wire, and the second cleaning system is used for drying the tungsten alloy wire. The first deplating and etching system is used for dissolving a metal nickel layer of the tungsten alloy wire and a nickel layer of carborundum, the second deplating and etching system is used for further dissolving the metal nickel layer of the tungsten alloy wire and the nickel layer of carborundum, the second cleaning system is used for cleaning etching liquid on the surface of the tungsten alloy wire, and the drying system is used for drying the deplated and etched tungsten alloy wire.

Description

Technical Field

[0001] The invention belongs to the field of photovoltaic slicing wire saws, and in particular relates to a device and method for recycling tungsten alloy wires and reuse thereof. Background Art

[0002] As photovoltaic slice manufacturers are constantly pursuing lower costs and greater profit value, with the expansion of photovoltaic industry technology and production capacity, diamond wire, as one of its important raw and auxiliary materials, has reduced its procurement cost and become the first choice for many customers. With the advancement of diamond wire technology, new alloy materials are being developed in an endless stream, among which tungsten wire alloy is the first choice on the road to thin wire. In particular, the doped and modified alloy tungsten wire as a wire saw carrier has the following excellent performances: (1) high breaking tensile force, which is 1.2 to 1.3 times that of the same specification carbon steel wire saw carrier, and high torsion value, which is more than 10 times that of the same specification carbon steel wire saw carrier. The Young's modulus of the alloy tungsten wire is 1.7 times that of steel wire, and the elongation is only about 60% of that of carbon steel. (2) Tungsten belongs to the body-centered cubic lattice. The alloy tungsten wire after doping and modification belongs to the microcrystalline structure with a grain size of about 100nm, which makes its structure uniform and has no inclusions inside. Its purity is as high as 99.95%, which is conducive to the drawing of ultra-fine tungsten wire. (3) The resistivity of the alloy tungsten wire is 5.4×10 -6 Ω / cm, which is only 55.7% of carbon steel. It can carry twice as much current, and the nickel plating deposition is more uniform and dense; (4) High corrosion resistance, no corrosion in sulfuric acid or hydrochloric acid, effectively avoiding acid corrosion in the production process that causes busbar defects and broken wires, resulting in high costs and low profit margins. If the old wires after tungsten alloy diamond wire cutting can be reused, it will bring huge economic benefits and reduce manufacturing costs.

[0003] The patent application with patent application number CN202310283839.X discloses a method for separating and recovering tungsten and nickel resources from photovoltaic tungsten wire waste, including the following process: electrolyzing the photovoltaic tungsten wire waste, wherein the electrolysis uses the photovoltaic tungsten wire as an anode, an inert electrode as a cathode, and an acid solution as an electrolyte, so that the nickel on the surface of the photovoltaic tungsten wire is dissolved in the electrolyte to obtain tungsten wire; the tungsten wire is subjected to high-temperature quenching and embrittlement, and then crushed to obtain tungsten particles; the tungsten particles are subjected to high-temperature activation oxidation to oxidize the tungsten particles to obtain tungsten oxide particles; the tungsten oxide particles are immersed in an alkali solution for alkali leaching to obtain alkali metal tungstate. The present invention can efficiently separate and recover tungsten and nickel resources from photovoltaic tungsten wire waste.

[0004] At present, most of the old diamond wires in the diamond wire saw industry are treated as waste steel wires after routine use, mainly used for steel smelting, and rarely reused. How to achieve high-speed deplating after the customer's old wire is returned and ensure that each section of steel wire is removed cleanly has become quite tricky and difficult. These technical problems have increased the complexity of re-deplating the tungsten wire and preparing it into a new diamond wire saw. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a technical solution that can realize the recovery and reuse of tungsten alloy wire, specifically a device and method for recovering and reusing tungsten alloy wire. In order to achieve the purpose of the above invention, the technology of the present invention provides the following technical solutions:

[0006] A device for recycling tungsten alloy wires, the device sequentially comprises a first cleaning system, a first stripping and etching system, a second stripping and etching system, a second cleaning system and a drying system. The first cleaning system consists of a first cleaning tank and a first cleaning sub-tank, and an ultrasonic vibration plate is arranged in the first cleaning tank; the first stripping and etching system consists of a first stripping and etching main tank and a first stripping and etching sub-tank located below the first stripping and etching main tank, and a circulating pump circulates the etching liquid between the first stripping and etching main tank and the first stripping and etching sub-tank, and the first stripping and etching main tank and the first stripping and etching sub-tank are connected through a PP pipe; the drying system consists of two parallel ovens and a fan; the structure of the second cleaning system is the same as that of the first cleaning system; the structure of the second stripping and etching system is the same as that of the first stripping and etching system.

[0007] Preferably, the device further comprises a line-releasing system arranged before the first cleaning system; a detection system arranged after the drying system; and a line-receiving system arranged after the detection system.

[0008] Furthermore, it also includes a workbench or a work tank that runs through the aforementioned systems.

[0009] The first cleaning system is used to clean the tungsten alloy wire, the first stripping and etching system is used to dissolve the metal nickel layer of the tungsten alloy wire and the nickel layer of the corundum, the second stripping and etching system is used to further dissolve the metal nickel layer of the tungsten alloy wire and the nickel layer of the corundum, the second cleaning system is used to clean the etching liquid on the surface of the tungsten alloy wire, and the drying system is used to dry the tungsten alloy wire after stripping and etching; the detection system is used to continuously monitor the smoothness of the alloy wire substrate after stripping the coating, preferably, the detection system adopts a visual detection system, specifically, it can be a high-speed camera visual system, such as a commercially available industrial camera; the wire-receiving system includes a wire-receiving machine and a second tension control device, which is used to control the wire tension during the first stripping and etching and the second stripping and etching. The first tension control device and the second tension control device are tension swing arm systems composed of a private service motor and an angular displacement, which are used to adjust the tension of the tungsten alloy wire.

[0010] A traction wheel is arranged between each of the first cleaning system, the first stripping and etching system, the second stripping and etching system and the second cleaning system.

[0011] The surface of the traction wheel is provided with a plurality of "V"-shaped grooves, forming an integrated traction wheel.

[0012] A method for recycling tungsten alloy wires comprises the following steps: first cleaning the tungsten alloy wires to be recycled, first etching with a first deplating solution after cleaning, second etching with a second deplating solution, second cleaning, and drying to obtain recycled tungsten alloy wires.

[0013] Furthermore, the tungsten alloy wire recycling device of the present invention can be used to recycle used tungsten alloy wires. Specifically, the first cleaning is performed in the first cleaning system, and after the cleaning is completed, the first etching is performed with the first deplating solution in the first deplating and etching system, and then the second etching is performed with the second deplating solution in the second deplating and etching system, and then the second cleaning is performed in the second cleaning system, and then drying is performed to obtain the recycled tungsten alloy wire.

[0014] Preferably, the surface finish of the tungsten alloy wire after two stripping and etchings can also be detected by a detection system; and the wire tension during the first stripping and etching and the second stripping and etching can be controlled by a wire taking-up system.

[0015] The first cleaning and the second cleaning are carried out by ultrasonic cleaning, and the process parameters during cleaning are: temperature of 55-65° C., ultrasonic current of 2.0-4.0A;

[0016] Furthermore, the composition of the stripping solution used in the first etching is: 110-130 ml / L of concentrated sulfuric acid, 100-200 g / L of sodium bisulfate and 3-5 ml / L of hydrogen peroxide; the first stripping process conditions are as follows: the temperature is 25-50° C.; the stripping speed is controlled at 80-90 m / min, and the tension of the pay-off and take-up line is controlled at 1.5-2.0 N;

[0017] Furthermore, the composition of the deplating solution used in the second etching is: 110-130 ml / L concentrated sulfuric acid, 100-200 g / L sodium bisulfate, 3-5 ml / L hydrogen peroxide and 1-2 g / L sodium dodecyl sulfonate; the second etching deplating process conditions are as follows: temperature is 25-50°C; the deplating speed is controlled at 80-100 m / min, and the tension of the pay-off and take-up line is controlled at 1.5-2.0N.

[0018] Furthermore, in the drying process, two steps of drying are adopted. Specifically, the first step of drying is drying at 175-185°C for 4-10 seconds, and the second step of drying is drying at 190-210°C for 4-10 seconds.

[0019] A method for reusing a recycled tungsten alloy wire, wherein the recycled tungsten alloy wire is subjected to the steps of primary alkali degreasing, secondary degreasing, pickling, nickel impact, sanding, sand consolidation, and heat treatment in sequence, and then a diamond wire saw made of the recycled tungsten alloy wire can be made. The detailed process steps can refer to the process steps of processing a brand new tungsten alloy wire into a diamond wire saw in the prior art.

[0020] The present invention is improved by the following aspects: 1) Continuous stripping equipment is preferred, which has the stability of high-speed operation and low process disconnection rate compared with conventional electroplating lines; 2) Online visual processing system realizes ultra-fine stable photography function, realizes continuous monitoring of the finish of the busbar substrate after the coating is removed, and realizes continuous monitoring function; 3) The stripping system adopts a pressure relief cover structure to improve the stable flow state of the plating solution and solve the pain point of wire mesh adhesion and line disconnection; 4) Efficient and environmentally friendly stripping process to achieve 30-100m / min stripping efficiency; 5) Traditional stripping solution may take a long time to remove the coating, and the stripping solution formula used in the first etching stripping in the present invention may be able to speed up the stripping speed, thereby improving production efficiency and reducing damage to the substrate. Some stripping solutions may cause excessive corrosion or damage to the substrate, while the stripping solution used in the first etching stripping in this application can reduce such damage, thereby improving product quality. The deplating solution used in the first etching and deplating has good environmental protection: hydrogen peroxide is a relatively environmentally friendly oxidant. Compared with other strong oxidants, its decomposition products are water and oxygen, which pollutes the environment less. Stability and repeatability: The concentration range of each component in the deplating solution used in the first etching and deplating is relatively narrow, which helps to improve the stability and repeatability of the deplating solution and ensure the consistency of the deplating effect. 6) Sodium dodecyl sulfate is added to the second etching and deplating solution. It is a surfactant used to enhance the wetting ability of the deplated steel wire surface, accelerate the reaction speed, and reduce the residue of bare powder on the steel wire. Compared with the existing deplating equipment and process technology, the advantages of the present invention are: (1) The present invention has automatic loading and unloading for continuous production, and its equipment operation stability performance has significant advantages; (2) The present invention utilizes basic chemical raw materials to realize a green and efficient production process, and its production cost is low, with significant economic benefits.

[0021] The tungsten alloy busbar after stripping is successively subjected to wire laying, primary alkali degreasing, secondary degreasing, pickling, nickel impact, sanding, sand consolidation, heat treatment and wire winding. After the above steps, a new diamond wire is prepared for secondary utilization. The reused tungsten alloy diamond wire saw can reduce the manufacturing cost of the diamond wire by 70-80%, and realize a profit of 15-20 yuan per kilometer, which has great economic and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the device for recycling and reusing tungsten alloy wire of the present invention;

[0023] Figure 2 Schematic diagram of the device for recycling and reusing tungsten alloy wire of the present invention;

[0024] Figure 3 A schematic diagram of a first stripping and etching system in the device of the present invention;

[0025] Figure 4 This is a SEM image of the old wire before stripping in Example 2 of the present invention;

[0026] Figure 5 This is a SEM image of the tungsten alloy wire after stripping in Example 2 of the present invention;

[0027] Figure 6 This is a SEM image of a diamond wire saw used to cut the old wire 30 product for secondary use in Example 2 of the present invention;

[0028] Figure 7 This is a SEM picture of a diamond wire saw used to cut the old wire 32 product for secondary use in Example 3 of the present invention.

[0029] Among them: 1-first cleaning system; 11-first cleaning tank; 12-first ultrasonic vibration plate; 13-first cleaning sub-tank; 2-first stripping and etching system; 21-first stripping and etching main tank; 22-first stripping and etching sub-tank; 23-PP box; 24-PP tube; 3-second stripping and etching system; 31-second stripping and etching main tank; 32-second stripping and etching sub-tank; 4-second cleaning system; 41-second cleaning tank; 42-second ultrasonic vibration plate; 5-drying system; 51-oven; 52-fan; 6-pay-off system; 61-pay-off machine; 62-first tension control device; 7-detection system; 8-take-up system; 81-take-up machine; 82-second tension control device; 9-traction wheel. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments, but it should not be understood as limiting the protection scope of the present invention.

[0031] The chemicals used in the embodiments are all commercially available commodities. The busbar raw materials used in the embodiments of the present invention are old busbars stripped after cutting, and the diameter of the diamond powder is 5 to 12 μm, which has been plated with a nickel alloy coating.

[0032] On one hand, the present invention provides a device for recovering tungsten alloy wires, which sequentially comprises a first cleaning system, a first stripping and etching system, a second stripping and etching system, a second cleaning system and a drying system.

[0033] Preferably, the device further comprises a line-releasing system arranged before the first cleaning system; a detection system arranged after the drying system; and a line-receiving system arranged after the detection system.

[0034] It also includes a workbench or a work tank that runs through the aforementioned systems.

[0035] The first cleaning system is used to clean the tungsten alloy wire, the first stripping and etching system is used to dissolve the metal nickel layer of the tungsten alloy wire and the nickel layer of the corundum, the second stripping and etching system is used to further dissolve the metal nickel layer of the tungsten alloy wire and the nickel layer of the corundum, the second cleaning system is used to clean the etching liquid on the surface of the tungsten alloy wire, and the drying system is used to dry the tungsten alloy wire after stripping and etching. The wire-paying system includes a wire-paying machine and a first tension control device, which are used to adjust the tension of the tungsten alloy wire during operation; the detection system is used to continuously monitor the smoothness of the mother bar substrate after stripping the coating. Preferably, the detection system adopts a visual detection system, specifically, it can be a high-speed camera visual system, such as a commercially available industrial camera; the wire-receiving system includes a wire-receiving machine and a second tension control device, which are used to control the wire-receiving and wire-receiving tension during the first stripping and etching and the second stripping and etching. The first tension control device and the second tension control device are tension swing arm systems composed of a private service motor and an angular displacement, which are used to adjust the tension of the steel wire during operation.

[0036] A traction wheel is arranged between each of the first cleaning system, the first stripping and etching system, the second stripping and etching system and the second cleaning system. The surface of the traction wheel is provided with a plurality of "V"-shaped grooves, forming an integrated traction wheel.

[0037] Secondly, the present invention also provides a method for recycling used tungsten alloy wires using the tungsten alloy wire recycling device of the present invention. Specifically, a first cleaning is performed in a first cleaning system, and after the cleaning is completed, a first etching is performed using a first deplating solution in a first deplating and etching system, and then a second etching is performed using a second deplating solution in a second deplating and etching system, and then a second cleaning is performed in the second cleaning system, and then drying is performed to obtain the recycled tungsten alloy wire.

[0038] Preferably, the surface finish of the tungsten alloy wire after two stripping and etchings can also be detected by a detection system; and the wire take-up tension during the first stripping and etching and the second stripping and etching can be controlled by a wire take-up system.

[0039] The first cleaning and the second cleaning are carried out by ultrasonic cleaning, and the process parameters during cleaning are: temperature of 55-65°C, ultrasonic current of 2.0-4.0A; in some embodiments, the temperature during cleaning is 55°C, 58°C, 60°C, 62°C, 65°C or a temperature within a numerical range consisting of any two of the above specific values ​​as endpoints; in some embodiments, the ultrasonic current is 2.0A, 2.5A, 3.0A, 3.5A, 4.0A or an ultrasonic current within a numerical range consisting of any two of the above specific values ​​as endpoints;

[0040] The stripping solution used in the first etching is composed of: 110-130 ml / L of concentrated sulfuric acid, 100-200 g / L of sodium bisulfate and 3-5 ml / L of hydrogen peroxide; in some embodiments, the content of concentrated sulfuric acid is 110 ml / L, 115 ml / L, 120 ml / L, 125 ml / L, 130 ml / L or a content within a numerical range consisting of any two of the above specific values ​​as endpoints, and concentrated sulfuric acid refers to sulfuric acid with a concentration of more than 95%; in some embodiments, sulfuric acid The content of sodium hydrogen is: 100g / L, 110g / L, 120g / L, 130g / L, 140g / L, 150g / L, 160g / L, 170g / L, 180g / L, 190g / L, 200g / L or a content within a numerical range consisting of any two of the above specific values ​​as endpoints; in some embodiments, the content of hydrogen peroxide is 3ml / L, 4ml / L, 5ml / L or a content within a numerical range consisting of any two of the above specific values ​​as endpoints;

[0041] The first stripping process conditions are as follows: the temperature is 25-50°C, and in some embodiments, it is 25°C, 30°C, 35°C, 40°C, 45°C, 50°C or a temperature within a numerical range formed by any two of the above specific values ​​as endpoints; the stripping speed is controlled at 80-90m / min, and in some embodiments, the stripping speed is controlled at 80m / min, 82m / min, 84m / min, 86m / min, 88m / min, 90m / min or a speed within a numerical range formed by any two of the above specific values ​​as endpoints; the pay-off and retracting line tension is controlled at 1.5-2.0N, and in some embodiments, the pay-off and retracting line tension is controlled at 1.5N, 1.6N, 1.7N, 1.8N, 1.9N, 2.0N or a force within a numerical range formed by any two of the above specific values ​​as endpoints.

[0042] Further, the composition of the stripping solution used for the second etching is: 110-130ml / L concentrated sulfuric acid, 100-200g / L sodium bisulfate, 3-5ml / L hydrogen peroxide and 1-2g / L sodium dodecyl sulfonate. In some embodiments, the content of concentrated sulfuric acid is 110ml / L, 115ml / L, 120ml / L, 125ml / L, 130ml / L or a content within a numerical range consisting of any two of the above specific values ​​as endpoints. Concentrated sulfuric acid refers to sulfuric acid with an industrial grade concentration and a mass fraction of more than 95%; in some embodiments, the content of sodium bisulfate is: 100g / L, 110g / L, 120g / L, In some embodiments, the content of hydrogen peroxide is 3 ml / L, 4 ml / L, 5 ml / L, or a content within the numerical range consisting of any two of the above specific values ​​as endpoints; in some embodiments, the content of sodium dodecyl sulfate is 1 g / L, 1.2 g / L, 1.4 g / L, 1.6 g / L, 1.8 g / L, 2 g / L, or a content within the numerical range consisting of any two of the above specific values ​​as endpoints.

[0043] The second etching and stripping process conditions are as follows: the temperature is 25-50°C; the stripping speed is controlled to be 80-100m / min, and the tension of the retracting line is controlled to be 1.5-2.0N. 25°C, 30°C, 35°C, 40°C, 45°C, 50°C or a temperature within the numerical range formed by any two of the above specific values ​​as endpoints; the stripping speed is controlled to be 80-90m / min, in some embodiments, the stripping speed is controlled to be 80m / min, 82m / min, 84m / min, 86m / min, 88m / min, 90m / min or a speed within the numerical range formed by any two of the above specific values ​​as endpoints; the tension of the retracting line is controlled to be 1.5-2.0N, in some embodiments, the tension of the retracting line is controlled to be 1.5N, 1.6N, 1.7N, 1.8N, 1.9N, 2.0N or a force within the numerical range formed by any two of the above specific values ​​as endpoints.

[0044] Furthermore, in the drying process, two-step drying is adopted. Specifically, the first stage of drying is drying at 175-185°C for 4-10 seconds. In some embodiments, the drying temperature is 175°C, 180°C, 185°C or a temperature within the numerical range formed by any two of the above specific values ​​as endpoints; in some embodiments, the drying time is 4 seconds, 6 seconds, 8 seconds, 10 seconds or a time within the numerical range formed by any two of the above specific values ​​as endpoints.

[0045] Second stage drying: drying at 190-210°C for 4-10 seconds. In some embodiments, the drying temperature is 190°C, 195°C, 200°C, 205°C, 210°C, or a temperature within a numerical range consisting of any two of the above specific values ​​as endpoints; in some embodiments, the drying time is 4 seconds, 6 seconds, 8 seconds, 10 seconds, or a time within a numerical range consisting of any two of the above specific values ​​as endpoints.

[0046] Example 1

[0047] like Figure 1 and Figure 2 As shown, a tungsten alloy wire recovery device includes a first cleaning system, a first stripping and etching system, a second stripping and etching system, a second cleaning system and a drying system in sequence, and also includes a wire-releasing system arranged before the first cleaning system; a detection system arranged after the drying system; and a wire-receiving system arranged after the detection system.

[0048] The first cleaning system is used to clean the tungsten alloy wire, the first stripping and etching system is used to dissolve the metal nickel layer of the tungsten alloy wire and the nickel layer of the corundum, the second stripping and etching system is used to further dissolve the metal nickel layer of the tungsten alloy wire and the nickel layer of the corundum, the second cleaning system is used to clean the etching liquid on the surface of the tungsten alloy wire, and the drying system is used to dry the tungsten alloy wire after stripping and etching. The wire-paying system includes a wire-paying machine and a first tension control device, which are used to adjust the tension of the tungsten alloy wire during operation; the detection system is used to continuously monitor the smoothness of the busbar substrate after stripping the coating, preferably, the detection system adopts a visual detection system, specifically, it can be a high-speed camera visual system, such as a commercially available industrial camera; the wire-receiving system includes a wire-receiving machine and a second tension control device, which are used to control the wire-receiving and wire-receiving tension during the first stripping and etching and the second stripping and etching. The first tension control device and the second tension control device are tension swing arm systems composed of a servo motor and an angular displacement.

[0049] The first stripping and etching system and the second stripping and etching system have the same stripping tank structure. Figure 3As shown, the specific structure of the first strip-etching system is: a first strip-etching main tank 21 at the top and a first strip-etching sub-tank 22 located below the first strip-etching main tank 21, a circulation pump circulates the etching liquid between the first strip-etching main tank 21 and the first strip-etching sub-tank 22, and the first strip-etching main tank 21 and the first strip-etching sub-tank 22 are connected by a PP tube 24. When working, the circulation pump first transports the etching liquid from the first strip-etching sub-tank 22 to the first strip-etching main tank 21 at the top through the PP tube 24, and then flows back to the first strip-etching sub-tank 22, and repeats the cycle. Preferably, a horizontally arranged PP box is provided at the outlet of the first strip-etching main tank 21, and a plurality of holes are provided on the surface of the box; a PP box 23 is provided in the first strip-etching sub-tank 22, and a plurality of holes are also provided on the surface of the PP box 23; the PP boxes and the holes on the surfaces thereof provided in the first strip-etching main tank 21 and the strip-etching sub-tank 22 play a buffering role when the etching liquid circulates between the main tank and the sub-tank, so that the etching liquid level is stable, thereby improving the stable flow state of the plating liquid, and solving the pain point of wire breakage caused by wire mesh adhesion and paralleling;

[0050] A traction wheel is provided between each of the first cleaning system, the first stripping etching system, the second stripping etching system and the second cleaning system. Preferably, two parallel traction wheels are provided between the first stripping etching system and the second stripping etching system. The surface of the traction wheel is provided with a plurality of "V"-shaped grooves, and the traction wheel is integrated. The traction wheel is made of PP material, and the integrated traction wheel with 241 "V"-shaped grooves is finely turned to ensure the stability of the stripping steel wire at high speed operation, and realize the continuous recovery of the tungsten wire busbar body.

[0051] Example 2

[0052] In this embodiment, 30 products are used to cut the old wire, such as Figure 4 As shown, it is recycled, and the recycling process includes the following steps:

[0053] A method for recycling tungsten alloy wires comprises the following steps: rewinding a diamond wire to be recycled, performing a first ultrasonic hot water wash, performing a first etching with a deplating solution after the ultrasonic water wash, then performing a second etching, and finally performing a second ultrasonic hot water wash. After completion, the wire is dried to obtain the recycled tungsten alloy wire.

[0054] The stripping solution used in the first etching is composed of: 110-130 ml / L concentrated sulfuric acid, 100-200 g / L sodium bisulfate and 3-5 ml / L hydrogen peroxide; the temperature is 25-50°C; the stripping speed is controlled at 80-90 m / min, and the tension of the pay-off and take-up line is controlled at 1.5-2.0 N;

[0055] The stripping solution used in the second etching is composed of: 110-130 ml / L concentrated sulfuric acid, 100-200 g / L sodium bisulfate: 3-5 ml / L hydrogen peroxide and 1-2 g / L sodium dodecyl sulfonate; temperature = 25-50°C; the stripping speed is controlled to 80-100 m / min, and the tension of the pay-off and take-up line is controlled to 1.5-2.0N.

[0056] The process parameters during the first ultrasonic hot water washing and the second ultrasonic hot water washing are:

[0057] Temperature = 55 ~ 65 ° C, ultrasonic current: 2.0 ~ 4.0A.

[0058] In the drying process, the first stage of drying is drying at 175-185°C for 4-10 seconds, and the second stage of drying is drying at 190-210°C for 4-10 seconds.

[0059] The SEM photo of the recycled tungsten alloy wire in this example is as follows: Figure 5 As shown in the figure, the recycled tungsten alloy wire is tested according to the common test method in the industry. The breaking tensile force of the recycled tungsten alloy wire is 6.7-6.9N, and the tensile force increment is 0.7-0.8N. Its indicators are consistent with those of the new mother wire. It is made into a new diamond wire saw, which is successively processed through wire laying → primary alkali degreasing → secondary degreasing → pickling → nickel impact → sanding → sand consolidation → heat treatment → wire winding. After the above steps, a new diamond wire is prepared to achieve secondary utilization. Figure 6 As shown in the client test data, the wire breakage rate is 3.2%, the A rate is 94.5%, and the line mark is 0.58%. The cutting performance is consistent with the normal and slightly better.

[0060] Example 3

[0061] In this embodiment, the 32 product is used to cut the old wire, and then a new alloy tungsten wire diamond wire saw is prepared after recycling. The preparation process of this embodiment includes the following steps:

[0062] A method for recycling tungsten alloy wires comprises the following steps: rewinding a diamond wire to be recycled, performing a first ultrasonic hot water wash, performing a first etching with a deplating solution after the ultrasonic water wash, then performing a second etching, and finally performing a second ultrasonic hot water wash. After completion, the wire is dried to obtain the recycled tungsten alloy wire.

[0063] The stripping solution used in the first etching is composed of: 110-130 ml / L concentrated sulfuric acid, 100-200 g / L sodium bisulfate and 3-5 ml / L hydrogen peroxide; the temperature is 25-50°C; the stripping speed is controlled at 80-90 m / min, and the tension of the pay-off and take-up line is controlled at 1.5-2.0 N;

[0064] The stripping solution used in the second etching is composed of: 110-130 ml / L concentrated sulfuric acid, 100-200 g / L sodium bisulfate: 3-5 ml / L hydrogen peroxide and 1-2 g / L sodium dodecyl sulfonate; temperature = 25-50°C; the stripping speed is controlled to 80-100 m / min, and the tension of the pay-off and take-up line is controlled to 1.5-2.0N.

[0065] The process parameters during the first ultrasonic hot water washing and the second ultrasonic hot water washing are:

[0066] Temperature = 55 ~ 65 ° C, ultrasonic current: 2.0 ~ 4.0A.

[0067] In the drying process, the first stage of drying is drying at 175-185°C for 4-10 seconds, and the second stage of drying is drying at 190-210°C for 4-10 seconds.

[0068] The secondary reused master wire alloy tungsten wire prepared by the present invention is successively subjected to wire laying, primary alkali degreasing, secondary degreasing, pickling, nickel impact, sanding, sand consolidation, heat treatment, and wire winding to obtain a diamond wire saw, such as Figure 7 As shown, according to the common test method in the industry, the breaking force value of the product is 6.7-6.9N, and the value-added force is 0.7-0.8N. Its indicators are consistent with those of a new busbar. According to the test data of the client, the wire breakage rate is 3.2%, the A rate is 94.5%, the line mark is 0.58%, and the cutting performance is consistent with and slightly better than the conventional ones.

[0069] The comparison of product index parameters and customer cutting verification data of the secondary-utilized busbars in Examples 2 and 3 are shown in Tables 1 and 2.

[0070] Table 1 Comparison of parameters of tungsten alloy wires recovered from Examples 2 to 3 and conventional diamond wires

[0071]

[0072]

[0073] Table 2 Comparison of client performance of tungsten alloy wires recycled in Examples 2-3 and conventional diamond wire products

[0074]

[0075] It can be seen from Table 1 and Table 2 that the present invention can stably perform the secondary utilization of the old wire by strictly controlling the stripping process parameters in step 1 and step 2, and combining the parameters of the diamond wire sanding and consolidation process, and prepare a tungsten alloy diamond wire saw with the same level as a new busbar, thereby saving raw material costs and improving product market competitiveness. The manufacturing cost of the diamond wire saw is saved by 10-15 yuan / km.

Claims

1. A device for recycling tungsten alloy wire, characterized in that: The device comprises in sequence a first cleaning system, a first stripping and etching system, a second stripping and etching system, a second cleaning system and a drying system.

2. The device for recovering tungsten alloy wire according to claim 1, characterized in that: The first cleaning system is used to clean the tungsten alloy wire, the first stripping and etching system is used to dissolve the metal nickel layer of the tungsten alloy wire and the nickel layer of the corundum, the second stripping and etching system is used to further dissolve the metal nickel layer of the tungsten alloy wire and the nickel layer of the corundum, the third cleaning system is used to clean the etching liquid on the surface of the tungsten alloy wire, and the drying system is used to dry the tungsten alloy wire after stripping and etching.

3. The device for recovering tungsten alloy wire according to claim 1, characterized in that: It also includes a wire-releasing system arranged before the first cleaning system; a detection system arranged after the drying system; and a wire-receiving system arranged after the detection system.

4. The device for recovering tungsten alloy wire according to claim 1, characterized in that: Traction wheels are arranged between adjacent ones of the first cleaning system, the first stripping and etching system, the second stripping and etching system and the second cleaning system.

5. The device for recovering tungsten alloy wire according to claim 4, characterized in that: The surface of the traction wheel is provided with a plurality of "V"-shaped grooves.

6. A method for recycling tungsten alloy wire, characterized in that: The tungsten alloy wire to be recycled is cleaned for the first time, and after cleaning, it is etched for the first time with a first deplating solution, and then etched for the second time with a second deplating solution, and then cleaned for the second time, and finally dried to obtain the recycled tungsten alloy wire.

7. The method for recycling tungsten alloy wire according to claim 6, characterized in that: The first stripping solution is composed of: 110-130 ml / L concentrated sulfuric acid, 100-200 g / L sodium bisulfate and 3-5 ml / L hydrogen peroxide; the first stripping process conditions are as follows: temperature is 25-50°C; the stripping speed is controlled at 80-90 m / min, and the tension of the pay-off and take-up line is controlled at 1.5-2.0N.

8. The method for recycling tungsten alloy wire according to claim 6, characterized in that: The composition of the second stripping solution is: 110-130 ml / L concentrated sulfuric acid, 100-200 g / L sodium bisulfate, 3-5 ml / L hydrogen peroxide and 1-2 g / L sodium dodecyl sulfate; the second etching stripping process conditions are as follows: temperature is 25-50°C; the stripping speed is controlled at 80-100 m / min, and the tension of the take-up and pay-off line is controlled at 1.5-2.0N.

9. A method for recycling tungsten alloy wire, characterized in that: The recycled tungsten alloy wire can be made into a new diamond wire saw by sequentially undergoing the steps of primary alkali degreasing, secondary degreasing, pickling, nickel impact, sanding, sand consolidation and heat treatment.

Images