CN113828407A - Efficient crushing method for waste hard materials - Google Patents
Efficient crushing method for waste hard materials Download PDFInfo
- Publication number
- CN113828407A CN113828407A CN202110866605.9A CN202110866605A CN113828407A CN 113828407 A CN113828407 A CN 113828407A CN 202110866605 A CN202110866605 A CN 202110866605A CN 113828407 A CN113828407 A CN 113828407A
- Authority
- CN
- China
- Prior art keywords
- hard materials
- waste
- waste hard
- electrode
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
- B02C2019/183—Crushing by discharge of high electrical energy
Abstract
The invention relates to the technical field of recovery of waste hard materials, in particular to a high-efficiency crushing method of waste hard materials. The method comprises the following steps: electrically connecting the electrode to a positive electrode of a power source for driving the electrode to rotate; electrically connecting the waste hard materials with the negative electrode of the power supply, generating arc plasma in a discharge gap between the electrode and the waste hard materials, controlling parameters of the power supply, and melting a part of the waste hard materials to form a melting line; introducing a fluid medium into the discharge gap to split the waste hard material along the melting line to finish crushing; the power supply is a pulse power supply, the pulse width is 250ms-300ms, and the pulse interval is 250ms-300 ms; the power supply parameters of the pulse power supply comprise: the gap voltage is 10V-160V, and the discharge current is 1500A-2000A. The method has the advantages of high efficiency, low cost, no environmental pollution, environmental protection and simple process flow, and is beneficial to the efficiency and safety of subsequent purification.
Description
Technical Field
The invention relates to the technical field of recovery of waste hard materials, in particular to an efficient crushing method of waste hard materials.
Background
The hard material has good strength, excellent heat resistance and extremely high hardness, can be used for manufacturing cutting tools, cutters and wear-resistant parts, and is widely applied to the fields of military industry, aerospace, machining, metallurgy, petroleum drilling, mine tools, electronic communication, building and the like.
Because the added value of the hard materials is high and the raw materials are scarce, the recovery of the waste hard materials is particularly important after the hard materials fail in service, and the method is an important development direction for resource recycling.
At present, the recovery means of the waste hard materials is mainly chemical recovery or physical recovery. In particular, chemical recovery mainly separates and purifies materials through a displacement reaction, and in the purification process, the waste hard materials belong to parts and have large sizes, so that the purification time is long, the efficiency is low, and the purification is not thorough. The physical recovery is mainly realized by treating the waste hard materials through a mechanical crushing method, but because of the characteristic of higher hardness of the hard materials, the existing mechanical crushing method has the problems of long crushing time, low efficiency, easy damage to equipment, increase of spare part cost and the like, and the existing waste hard materials recovery also has the problem of inconvenient process.
Disclosure of Invention
Based on the method, the invention provides a high-efficiency crushing method of waste hard materials. High efficiency, low cost, no environmental pollution, environmental protection, simple process flow and being beneficial to the efficiency and safety of subsequent purification.
The technical scheme is as follows:
the efficient crushing method of the waste hard materials comprises the following steps:
electrically connecting the electrode to a positive electrode of a power source for driving the electrode to rotate;
electrically connecting the waste hard material with the negative electrode of the power supply, generating arc plasma in a discharge gap between the electrode and the waste hard material, controlling parameters of the power supply, and melting a part of the waste hard material to form a melting line;
introducing a fluid medium into the discharge gap to split the waste hard material along the melting line to finish crushing;
the power supply is a pulse power supply, the pulse width is 250ms-300ms, and the pulse interval is 250ms-300 ms;
the parameters of the pulse power supply include: the gap voltage is 10V-160V, and the discharge current is 1500A-2000A.
In one embodiment, the power supply parameters of the pulse power supply include: the gap voltage is 45V-60V, and the discharge current is 1500A-2000A.
In one embodiment, the distance between the discharge end of the electrode and the waste hard material is 0.1mm-1 mm.
In one embodiment, the rotation speed of the electrode is 2000r/min-4000 r/min.
In one embodiment, the electrode is provided with a hollow cavity, and the fluid medium is introduced into the hollow cavity to cause the working form of the arc plasma to change, so that a tiny explosion is generated.
In one embodiment, the flow rate of the fluid medium is 40L/min to 50L/min.
In one embodiment, the fluid medium is selected from an aqueous-based medium and/or an inert gas.
In one embodiment, the waste hard materials are selected from waste hard alloys, waste refractory metals, or waste ceramic materials.
In one embodiment, the material of the electrode is graphite.
In one embodiment, the physical form of the cemented carbide is a regular shape or an irregular shape;
the regular shape is a rod or a plate.
In one embodiment, the average particle size of the crushed waste hard materials is 1-1000 μm.
Compared with the prior art, the invention has the following beneficial effects:
the invention utilizes the high-density energy heat source-arc plasma body of the discharge gap between the electrode and the waste hard material to melt a part of the waste hard material, and forms a melting line by controlling the pulse width, the pulse interval and the power supply parameters of the power supply. The method for crushing the waste hard materials has the advantages of high efficiency, low cost, no pollution to the environment, environmental protection and simple process flow, and is beneficial to the efficiency and safety of subsequent purification.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Term(s) for
Unless otherwise stated or contradicted, terms or phrases used herein have the following meanings:
as used herein, the term "and/or", "and/or" includes any one of two or more of the associated listed items, as well as any and all combinations of the associated listed items, including any two of the associated listed items, any more of the associated listed items, or all combinations of the associated listed items.
As used herein, "one or more" means any one, any two, or any two or more of the listed items. Wherein, the 'several' means any two or more than any two.
As used herein, "a combination thereof," "any combination thereof," and the like, includes all suitable combinations of any two or more of the listed items.
In the present specification, the term "suitable" in "a suitable combination, a suitable manner," any suitable manner "and the like is based on the technical solution of the present invention that can be implemented, the technical problem of the present invention can be solved, and the technical effect of the present invention can be achieved.
In this document, "preferred" is only an embodiment or example for better description, and it should be understood that the scope of the present invention is not limited thereto.
In the present invention, the technical features described in the open type include a closed technical scheme composed of the listed features, and also include an open technical scheme including the listed features.
In the present invention, the numerical range is defined to include both end points of the numerical range unless otherwise specified.
The percentage contents referred to in the present invention mean, unless otherwise specified, mass percentages for solid-liquid mixing and solid-solid phase mixing, and volume percentages for liquid-liquid phase mixing.
The percentage concentrations referred to in the present invention refer to the final concentrations unless otherwise specified. The final concentration refers to the ratio of the additive component in the system to which the component is added.
The temperature parameter in the present invention is not particularly limited, and may be a constant temperature treatment or a treatment within a certain temperature range. The constant temperature process allows the temperature to fluctuate within the accuracy of the instrument control.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected through the interior of two elements or through the interaction of two elements unless otherwise expressly limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The hard material has good strength, excellent heat resistance and extremely high hardness, can be used for manufacturing cutting tools, cutters and wear-resistant parts, and is widely applied to the fields of military industry, aerospace, machining, metallurgy, petroleum drilling, mine tools, electronic communication, building and the like.
Because the added value of the hard materials is high and the raw materials are scarce, the recovery of the waste hard materials is particularly important after the hard materials fail in service, and the method is an important development direction for resource recycling.
At present, the recovery means of the waste hard materials is mainly chemical recovery or physical recovery. In particular, chemical recovery mainly separates and purifies materials through a displacement reaction, and in the purification process, the waste hard materials belong to parts and have large sizes, so that the purification time is long, the efficiency is low, and the purification is not thorough. The physical recovery is mainly realized by treating the waste hard materials through a mechanical crushing method, but because of the characteristic of higher hardness of the hard materials, the existing mechanical crushing method has the problems of long crushing time, low efficiency, easy damage to equipment, increase of spare part cost and the like, and the existing waste hard materials recovery also has the problem of inconvenient process.
The invention provides a high-efficiency crushing method for waste hard materials, aiming at the problems of low efficiency, high cost and inconvenient process existing in the conventional recovery of the waste hard materials.
The technical scheme is as follows:
a high-efficiency crushing method of waste hard materials comprises the following steps:
electrically connecting the electrode to a positive electrode of a power source for driving the electrode to rotate;
electrically connecting the waste hard material with the negative electrode of the power supply, generating arc plasma in a discharge gap between the electrode and the waste hard material, controlling parameters of the power supply, and melting a part of the waste hard material to form a melting line;
introducing a fluid medium into the discharge gap to split the waste hard material along the melting line to finish crushing;
the power supply is a pulse power supply, the pulse width is 250ms-300ms, and the pulse interval is 250ms-300 ms;
the parameters of the pulse power supply include: the gap voltage is 10V-160V, and the discharge current is 1500A-2000A.
The method utilizes high-density energy heat source-arc plasma of discharge gap between electrode and waste hard material to melt a part of waste hard material, and forms a melting line by controlling pulse width, pulse interval and power supply parameters of power supply. The method for crushing the waste hard materials has the advantages of high efficiency, low cost, no pollution to the environment, environmental protection and simple process flow, and is beneficial to the efficiency and safety of subsequent purification.
Specifically, the electrode is electrically connected with the positive electrode of a power supply, the waste hard materials are electrically connected with the negative electrode of the power supply, at the moment, a certain potential difference exists between the electrode and the waste hard materials, the distance between the discharge end of the electrode and the waste hard materials can be adjusted through a motion control system, the electrode and the waste hard materials are close to each other, when the relative positions of the electrode and the waste hard materials are proper, arc plasma can be generated in the discharge gap between the electrode and the waste hard materials, the arc plasma is a high-density energy heat source, the central temperature is up to 10000K, and the waste hard materials can be melted under the action of the arc plasma.
The motion control system can adjust the relative positions of the electrode and the workpiece to obtain an arc plasma in an ideal discharge state. In one embodiment, the distance between the discharge end of the electrode and the waste hard material is 0.1mm-1 mm. More preferably, the distance between the discharge end of the electrode and the waste hard material is 0.1mm-0.8 mm.
It will be appreciated that the power supply is a pulsed power supply, which is either an ac pulsed power supply or an ac constant current power supply. Under the drive of the positive pole of the power supply, the electrode makes a high-speed rotating mechanical motion relative to the waste hard material.
In one embodiment, the material of the electrodes is graphite, and the spindle is rotatable through 360 °.
When the power supply is a pulse power supply, the pulse width may be 250ms to 300ms, and the pulse interval may be 250ms to 300 ms.
And controlling the power supply parameters of the power supply, including controlling the gap voltage of the power supply to be 10-160V and the discharge current to be 1500-2000A. More preferably, the gap voltage of the control power supply is 45V-60V, and the discharge current is 1500A-2000A.
Through controlling above-mentioned parameter, can control the melting condition of old and useless hard material, be different from at old and useless hard material surface formation minim scope molten pit, under above-mentioned parameter, electric arc plasma can carry out deeper melting to old and useless hard material, partly with the inside melting of old and useless hard material, forms the melting line in old and useless hard material inside, when introducing fluid medium at the discharge gap this moment, can impel old and useless hard material to split along the melting line, reaches the purpose with old and useless hard material breakage.
The fluid medium is introduced to generate flow field impact force, and under the impact force, the purpose of crushing the waste hard material can be achieved. At the moment, the fluid medium can be introduced from the outside of the electrode, the electrode can be of a solid structure, and under the combined action of small flow field impact force and the rotating electrode, the waste hard materials are split along the melting line, so that the purpose of crushing the waste hard materials is achieved.
Alternatively, an electrode provided with a hollow cavity may be used from which the fluid medium is introduced, in which case the flow rate of the fluid medium is greater. In one embodiment, the electrode is provided with a hollow cavity, a fluid medium is introduced from the inside/outside of the hollow cavity of the electrode and flows to the waste hard materials, the fluid medium flows to the waste hard materials to generate a large flow velocity and a large flow field impact force, the working form of arc plasma in a discharge gap between the electrode and the waste hard materials is changed under the mutual matching of the rotary electrodes, micro explosion is generated, and the waste hard materials can be further crushed under the impact force of the explosion.
In one embodiment, the flow rate at which the fluid medium is introduced is 40L/min to 50L/min.
In one embodiment, the rotation speed of the electrode is 2000r/min-4000 r/min. More preferably, the rotating speed of the electrode is 2000r/min-2800 r/min.
It is understood that the electrode provided with a hollow cavity is an electrode provided with a single tube, multiple tubes and hollow nests. It will be appreciated that the fluid medium may be introduced separately from within or outside the hollow cavity of the electrode, or may be introduced simultaneously from within and outside the hollow cavity of the electrode. The fluid media flowing in from the inside of the hollow cavity and the outside of the hollow cavity can be the same fluid media or different fluid media. The fluid medium introduced into the hollow cavity and the fluid medium introduced out of the hollow cavity are independently selected from water-based media and/or inert gases, which also include nitrogen. The aqueous medium is preferably distilled water.
It will be appreciated that the fluid medium may be introduced at the same time as the power source is activated.
The broken waste hard materials can be discharged under the impact of a fluid medium.
In one embodiment, the scrap hard material is selected from scrap cemented carbide, scrap refractory metal, or scrap ceramic material.
It can be understood that under the action of the motion control system, the electrode can continuously move, and the waste hard materials are crushed in all aspects, so that the invention can not make special requirements on the physical form of the waste hard materials.
Optionally, the physical form of the cemented carbide is a regular shape or an irregular shape;
the regular shape is a rod or a plate.
In one embodiment, the average particle size of the crushed waste hard materials is 1 μm to 1000 μm.
The following examples and comparative examples are further described below, and the starting materials used in the following examples may be commercially available, unless otherwise specified, or the equipment used therein may be commercially available, unless otherwise specified.
Example 1
The embodiment provides a high-efficiency crushing method of waste hard materials, which comprises the following steps:
taking rod-shaped waste hard metal pure tungsten with the diameter of 4cm and the length of 20cm, and electrically connecting the rod-shaped waste hard metal pure tungsten to the negative electrode of a power supply;
taking a solid graphite electrode, and electrically connecting the solid graphite electrode to the positive electrode of a power supply;
the power supply is a pulse power supply, the pulse width is 250ms, the pulse interval is 250ms, and power supply parameters are set as follows: the gap voltage was 50V and the discharge current was 2000A.
Starting a power supply, rotating a graphite electrode 360 degrees around a main shaft at the rotating speed of 2500r/min, adjusting the distance between the graphite electrode and the waste hard alloy to be 0.5mm through a motion control system, generating high-energy arc plasma in a discharge gap between the graphite electrode and the waste hard alloy, enabling part of the waste hard alloy to be melted by the high energy, forming a melting line in the waste hard alloy, introducing distilled water into the discharge gap at the same time, wherein the flow rate during introduction is 40L/min, the waste hard alloy is split along the melting line under the action of the rotating graphite electrode and the flow field, the waste hard alloy is crushed, the crushed waste hard alloy is discharged along with the distilled water and collected, and the particle size of the obtained particles is 50-400 meshes.
The method of the embodiment is adopted to crush the waste hard alloy, and the processing efficiency is 2 kg/h.
Example 2
The embodiment provides a high-efficiency crushing method of waste refractory metals, which comprises the following steps:
taking a plate-shaped waste refractory metal Inconel718 alloy, wherein the length is 30cm, the width is 30cm, and the thickness is 10 cm. A negative electrode electrically connecting it to a power source;
taking a solid graphite electrode, and electrically connecting the solid graphite electrode to the positive electrode of a power supply;
the power supply is a pulse power supply, the pulse width is 280ms, the pulse interval can be 280ms, and the power supply parameters are set as follows: the gap voltage was 60V and the discharge current was 1800A.
Starting a power supply, rotating a graphite electrode around a main shaft for 360 degrees at a rotating speed of 3000r/min, adjusting the distance between the graphite electrode and the waste refractory metal to be 0.8mm through a motion control system, generating high-energy arc plasma in a discharge gap between the graphite electrode and the waste refractory metal, enabling part of the waste refractory metal to be melted by high energy, forming a melting line in the waste refractory metal, introducing distilled water into the discharge gap at the same time, wherein the flow rate during introduction is 40L/min, splitting the waste refractory metal along the melting line under the action of the rotating graphite electrode and the flow field to realize crushing of the waste refractory metal, discharging the crushed waste refractory metal along with the distilled water, and collecting the waste refractory metal, wherein the particle size of the obtained particles is 50-400 meshes.
The method of the embodiment is adopted to crush the waste refractory metals, and the processing efficiency is 2 kg/h.
Example 3
The embodiment provides a high-efficiency crushing method of waste ceramic materials, which comprises the following steps: taking irregular waste ceramic materials with the size of about 15cm multiplied by 20cm multiplied by 15cm and the component of Ti3AlC2, and electrically connecting the irregular waste ceramic materials to the negative pole of a power supply;
taking a solid graphite electrode, and electrically connecting the solid graphite electrode to the positive electrode of a power supply;
the power supply is a pulse power supply, the pulse width is 300ms, the pulse interval can be 300ms, and the power supply parameters are set as follows: the gap voltage was 45V and the discharge current was 1500A.
Starting a power supply, rotating a graphite electrode 360 degrees around a main shaft at the rotating speed of 2500r/min, adjusting the distance between the electrode and the waste ceramic material to be 1mm through a motion control system, generating high-energy arc plasma in a discharge gap between the electrode and the waste ceramic material, enabling the arc plasma to act on the waste ceramic material, melting a part of the waste ceramic material through the high energy, forming a melting line in the waste ceramic material, introducing distilled water into the discharge gap at the same time, wherein the flow rate during introduction is 50L/min, splitting the waste ceramic material along the melting line under the action of the rotating graphite electrode and the flow field, realizing the crushing of the waste ceramic material, discharging the crushed waste ceramic material along with the distilled water, and collecting the waste ceramic material, wherein the particle size of the obtained particles is 50-400 meshes.
The method of the embodiment is adopted to crush the waste ceramic material, and the processing efficiency is 1 kg/h.
Example 4
The embodiment provides a high-efficiency crushing method of waste hard materials, which comprises the following steps:
taking rod-shaped waste hard metal pure tungsten with the diameter of 4cm and the length of 20cm, and electrically connecting the rod-shaped waste hard metal pure tungsten to the negative electrode of a power supply;
taking a solid graphite electrode, and electrically connecting the solid graphite electrode to the positive electrode of a power supply;
the power supply is a pulse power supply, the pulse width is 280ms, the pulse interval can be 280ms, and the power supply parameters are set as follows: the gap voltage was 100V and the discharge current was 2000A.
Starting a power supply, enabling a graphite electrode to rotate around a main shaft for 360 degrees at the rotating speed of 4000r/min, adjusting the distance between the electrode and the waste hard alloy to be 1mm through a motion control system, generating high-energy arc plasma in a discharge gap between the electrode and the waste hard alloy, enabling part of the waste hard alloy to be molten by the arc plasma, forming a melting line in the waste hard alloy, introducing distilled water into the discharge gap at the same time, enabling the flow rate during introduction to be 40L/min, enabling the waste hard alloy to be split along the melting line under the action of the rotating graphite electrode and the flow field, breaking the waste hard alloy, discharging the broken waste hard alloy along with the distilled water, and collecting the waste hard alloy, wherein the particle size of the obtained particles is 50-400 meshes.
The method of the embodiment is adopted to crush the waste hard alloy, and the processing efficiency is 2.2 kg/h.
Example 5
The embodiment provides a high-efficiency crushing method of waste refractory metals, which comprises the following steps:
taking spherical waste refractory metal YGH45T with the diameter of 15cm and the component WC80-Co12-8Ni, and electrically connecting the spherical waste refractory metal YGH45T to the negative electrode of a power supply;
taking a single-tube graphite electrode, electrically connecting the single-tube graphite electrode to the positive electrode of a power supply, wherein the outer diameter of a hollow tube is 20cm, and the inner diameter of the hollow tube is 10 cm;
the power supply is a pulse power supply, the pulse width is 200ms, the pulse interval can be 200ms, and power supply parameters are set as follows: the gap voltage was 50V and the discharge current was 1500A.
Starting a power supply, rotating a graphite electrode around a main shaft for 360 degrees at a rotating speed of 3000r/min, adjusting the distance between the graphite electrode and the waste refractory metal to be 1mm through a motion control system, generating high-energy arc plasma in a discharge gap between the graphite electrode and the waste refractory metal, enabling a part of the waste refractory metal to be melted by the arc plasma, forming a melting line in the waste refractory metal, introducing distilled water into a hollow cavity of the graphite electrode and flowing to the waste refractory metal, completing the introduction of the distilled water in the discharge gap, wherein the flow rate during introduction is 40L/min, the waste metal is split along the melting line under the action of the rotating graphite electrode and the flow field, meanwhile, the working form of the arc plasma in the discharge gap is changed, tiny explosion is observed, and the crushing of the waste refractory metal is further realized, and discharging the crushed waste refractory metals along with distilled water, and collecting the waste refractory metals, wherein the particle size of the obtained particles is 50-400 meshes.
The method of the embodiment is adopted to crush the waste refractory metals, and the processing efficiency is 3 kg/h.
According to the embodiment, the high-density energy heat source-arc plasma in the discharge gap between the electrode and the waste hard material is utilized to melt a part of the waste hard material, the power supply parameters of the power supply are controlled to form a melting line, and then the fluid medium and the rotating electrode are utilized to promote the waste hard material to be split along the melting line, so that the waste hard material is crushed. The production and processing efficiency is high, compared with the traditional method, the method is low in cost, free of pollution to the environment, green, environment-friendly, simple in process flow and beneficial to the efficiency and safety of subsequent purification.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The efficient crushing method of the waste hard materials is characterized by comprising the following steps:
electrically connecting the electrode to a positive electrode of a power source for driving the electrode to rotate;
electrically connecting the waste hard materials with the negative electrode of the power supply, generating arc plasma in a discharge gap between the electrode and the waste hard materials, controlling parameters of the power supply, and melting a part of the waste hard materials to form a melting line;
introducing a fluid medium into the discharge gap to split the waste hard material along the melting line to finish crushing;
the power supply is a pulse power supply, the pulse width is 250ms-300ms, and the pulse interval is 250ms-300 ms;
the parameters of the pulse power supply include: the gap voltage is 10V-160V, and the discharge current is 1500A-2000A.
2. The efficient crushing method for the waste hard materials as claimed in claim 1, wherein the distance between the discharge end of the electrode and the waste hard materials is 0.1mm-1 mm.
3. The efficient crushing method of the waste hard materials as claimed in claim 1, wherein the rotation speed of the electrodes is 2000r/min to 4000 r/min.
4. The method for efficiently crushing the waste hard materials as claimed in claim 1, wherein the electrodes are provided with hollow cavities, and the fluid medium is introduced into the hollow cavities to cause the working form of the arc plasma to change, so that micro explosion is generated.
5. The method for efficiently crushing the waste hard materials as claimed in claim 5, wherein the flow rate of the fluid medium is 40L/min to 50L/min.
6. The method for high-efficiency crushing of waste hard materials according to any one of claims 1 to 5, wherein the fluid medium is selected from water-based media and/or inert gases.
7. The method for efficiently crushing waste hard materials according to any one of claims 1 to 5, wherein the waste hard materials are selected from waste hard alloys, waste refractory metals or waste ceramic materials.
8. The method for efficiently crushing the waste hard materials according to any one of claims 1 to 5, wherein the material of the electrode is graphite.
9. The method for efficiently crushing the waste hard materials according to any one of claims 1 to 5, wherein the physical form of the cemented carbide is a regular shape or an irregular shape;
the regular shape is a rod or a plate.
10. The method for efficiently crushing waste hard materials according to any one of claims 1 to 5, wherein the average particle size of the crushed waste hard materials is 1 μm to 1000 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110866605.9A CN113828407B (en) | 2021-07-29 | 2021-07-29 | Efficient crushing method for waste hard materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110866605.9A CN113828407B (en) | 2021-07-29 | 2021-07-29 | Efficient crushing method for waste hard materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113828407A true CN113828407A (en) | 2021-12-24 |
| CN113828407B CN113828407B (en) | 2023-06-09 |
Family
ID=78963043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110866605.9A Active CN113828407B (en) | 2021-07-29 | 2021-07-29 | Efficient crushing method for waste hard materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113828407B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1066768A (en) * | 1963-11-18 | 1967-04-26 | Corning Glass Works | Method and apparatus for manufacturing glass beads |
| CN209139828U (en) * | 2018-11-15 | 2019-07-23 | 深圳创源航天科技有限公司 | A kind of metal powder granulates preparation facilities |
| CN110961645A (en) * | 2019-11-07 | 2020-04-07 | 深圳航科新材料有限公司 | New method for green recovery and reprocessing of metal to generate spherical composite powder |
| CN110961646A (en) * | 2019-11-07 | 2020-04-07 | 深圳航科新材料有限公司 | Metal powder and method for producing same |
| CN110961644A (en) * | 2019-11-07 | 2020-04-07 | 深圳航科新材料有限公司 | Novel spherical powder and method for producing same |
-
2021
- 2021-07-29 CN CN202110866605.9A patent/CN113828407B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1066768A (en) * | 1963-11-18 | 1967-04-26 | Corning Glass Works | Method and apparatus for manufacturing glass beads |
| CN209139828U (en) * | 2018-11-15 | 2019-07-23 | 深圳创源航天科技有限公司 | A kind of metal powder granulates preparation facilities |
| CN110961645A (en) * | 2019-11-07 | 2020-04-07 | 深圳航科新材料有限公司 | New method for green recovery and reprocessing of metal to generate spherical composite powder |
| CN110961646A (en) * | 2019-11-07 | 2020-04-07 | 深圳航科新材料有限公司 | Metal powder and method for producing same |
| CN110961644A (en) * | 2019-11-07 | 2020-04-07 | 深圳航科新材料有限公司 | Novel spherical powder and method for producing same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113828407B (en) | 2023-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Overview of the recycling technology for copper-containing cables | |
| CN103459624B (en) | Method for recovering valuable metals | |
| CN109996896B (en) | Method for producing titanium-aluminium-vanadium alloy | |
| Yang et al. | Recovery and regeneration of LiFePO 4 from spent lithium-ion batteries via a novel pretreatment process | |
| CN110961644B (en) | Spherical powder and method for producing the same | |
| CN103380220B (en) | Valuable metal recovery method | |
| AU2012358205B2 (en) | A system and method for extraction and refining of titanium | |
| CN107460503B (en) | The method of micro-nano copper powder is recycled from waste printed circuit board | |
| GB2537510A (en) | Method of recovering waste hard alloy | |
| CN102151924A (en) | Electric spark induction controllable erosion and electrolysis compound efficient machining method | |
| WO2006068660A2 (en) | Electrochemical dissolution of conductive composites | |
| CN111230134A (en) | Multicomponent alloy powder and its fast preparation method | |
| WO2019104809A1 (en) | Method for directly preparing tungsten-base alloy powder by electrolyzing discarded hard alloy | |
| JP5550336B2 (en) | Recirculation of superalloys using alkali metal salt melts | |
| JP5115209B2 (en) | Method for producing ceramic beads having a smooth surface | |
| WO2005111272A1 (en) | Process for producing microparticles by plasma-induced electrolysis | |
| CN113828407B (en) | Efficient crushing method for waste hard materials | |
| CN110961645B (en) | New method for producing spherical composite powder by green recovery and reprocessing of metal | |
| CN101767201A (en) | Method for preparing titanium alloy Ti60 prills by adopting plasma auxiliary rotary electrode | |
| CN106244806A (en) | The method of broken hard tungsten carbide waste | |
| CN101767202A (en) | Method for preparing high-temperature alloy GH4648 prills by adopting plasma auxiliary rotary electrode | |
| JP5702649B2 (en) | Carbon-metal composite and method for producing the same | |
| CN101781718A (en) | Method for extracting metal cobalt and tungsten from scrap hard alloy and special calcining device | |
| RU2802608C1 (en) | Method of plasma-liquid production of metal powders from 3d printing products | |
| CN113020613B (en) | Hollow powder and method for producing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |