A method for preparing copper oxide and copper oxide alloy powder by water atomization

Abstract

The invention discloses a method for preparing copper oxide and copper oxide alloy powder by water atomization, comprising the following steps: S1: smelting copper raw material into molten metal liquid; S2: subjecting the molten metal liquid to water atomization treatment, during the water atomization process, oxygen is filled into high-pressure water, and a mixture of oxygen and nitrogen is filled into the atomization barrel; S3: the metal powder collected in step S2 is dried, crushed, sieved, and packaged by high-temperature airflow to obtain the required copper oxide and copper oxide alloy powder. The invention provides a method for preparing copper oxide and copper oxide alloy powder by water atomization, and utilizes oxygen and atomized high-temperature copper powder to fully reflect the production of spherical or nearly spherical high-purity copper oxide and copper oxide alloy powder with an oxygen content of 1-5%, thereby further drying the high-temperature airflow to obtain high-purity copper oxide and copper oxide alloy powder with an oxygen content of 10-15%, and the product does not contain acidic substances.

Description

Technical Field

[0001] The invention relates to the technical field of metal powder preparation, and in particular to a method for preparing copper oxide and copper oxide alloy powder by water atomization. Background Art

[0002] Copper oxide and copper oxide alloy powder belong to a kind of metal oxide materials, and are widely used in the fields of catalysis, superconductivity, organic synthesis, and printed circuit board electroplating. In the production process of printed circuit boards, acidic etching waste liquid is easily generated in the etching step. Since the acidic etching waste liquid has a high content of copper, it is easy to pollute the environment and cause waste of resources. At present, copper oxide is mainly recovered from the acidic etching waste liquid by hydrothermal synthesis. However, the copper oxide prepared by reusing copper oxide from the acidic etching waste liquid has a high impurity content, especially a high content of chlorine, which limits its application in fields with high requirements for copper salt purity, such as fine product electroplating, copper foil production and other fields.

[0003] Copper oxide and copper oxide alloy powders are mostly prepared by chemical methods. At present, some processes use high-temperature roasting to prepare copper oxide and copper oxide alloy powders, but the finished copper oxide and copper oxide alloy powders are limited by the particle size of the raw materials themselves, and require grinding and other processes, which increases costs. Copper oxide and copper oxide alloy powders can also be prepared by gas-water atomization technology, but gas atomization simply uses oxygen. When preparing copper oxide, it contains a large amount of pure oxygen. Oxygen is a combustion aid, which will cause the temperature inside the atomization barrel to be high and the powder adhesion is relatively serious, resulting in copper powder sticking to the inner wall of the atomization barrel and the powder particles sticking to each other and difficult to form a sphere.

[0004] The existing market also has a water atomization process for preparing copper oxide and copper oxide alloy powders. However, the oxygen content of copper and copper alloys prepared by the existing water atomization process is very low, and does not have cost control advantages and subsequent application advantages. Summary of the invention

[0005] In view of this, the present invention proposes a method for preparing copper oxide and copper oxide alloy powder by water atomization.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for preparing copper oxide and copper oxide alloy powder by water atomization comprises the following steps:

[0008] S1: Smelting of copper raw materials

[0009] S11: placing the copper raw material in a smelting device, opening the gas station when smelting starts, maintaining an air pressure of 0.01-0.05MPa and an air flow rate of 100-500L / s, so that the copper begins to melt;

[0010] S12: After the temperature in the smelting equipment reaches 500° C., adjust the air pressure to 0.05-0.1 MPa and the air flow rate to 500-1000 L / s, so that the molten copper generates copper oxide;

[0011] S13: After the metal in the smelting equipment is completely melted, the air pressure is adjusted to 0.01-0.05MPa and the air flow rate is 100-500L / s to melt the copper into a molten metal state and stir the molten metal;

[0012] S2: The molten metal liquid is subjected to water atomization treatment. During the water atomization process, oxygen is filled into the high-pressure water, and a mixture of oxygen and nitrogen is filled into the atomization barrel;

[0013] S3: The metal powder collected in step S2 is dried, crushed, sieved and packaged, and the oxygen content is still increased during the drying process. After packaging, the required copper oxide and copper oxide alloy powder can be obtained.

[0014] Preferably, the specific steps of water atomization in step S2 are:

[0015] The molten metal liquid is added into the atomizing barrel; the atomizing barrel is filled with a mixed gas of oxygen and nitrogen; the high-pressure water is filled with oxygen; the high-pressure water filled with oxygen enters the nozzle in the atomizing barrel through a high-pressure pump, and the nozzle sprays a high-speed and high-pressure water flow to form high-pressure atomized water, and breaks the metal liquid flow into mist and condenses; the metal droplets are cooled at the lower end of the atomizing barrel to become copper oxide and copper oxide alloy powder, and the copper oxide and copper oxide alloy powder are collected.

[0016] Preferably, an exhaust fan is provided at the upper end of the wall of the atomizing barrel.

[0017] Preferably, the water in the atomizing barrel is not discharged, and after atomization, the copper powder and water are separated by a centrifuge or a filter press, and then the water passes through a sedimentation tank, and the precipitated water is replenished into the water used in the atomizing barrel, so as to form a water cycle.

[0018] Preferably, in step S2, oxygen with an intake pressure of 0.1 MPa is mixed into high-pressure water; the pressure of high-pressure atomized water is 15 MPa-25 MPa; and the flow rate of high-pressure atomized water is 300-450 L / min.

[0019] Preferably, the nozzle adopts V-shaped spray or conical spray.

[0020] Preferably, the smelting equipment is a medium frequency smelting furnace.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) Compared with gas atomization, water atomization has advantages in that the powder particles produced by water atomization are more uniform in size and are spherical, spherical, nearly spherical or nearly spherical;

[0023] (2) The air adjustment method during the copper melting stage can protect the air pipeline from being blocked. If the air is stopped, the contact temperature between the molten metal and the pipe mouth will be reduced, causing blockage, and the pipe cannot be used again. At the same time, the change in oxygen content is relatively slight, and it is basically difficult to generate oxides;

[0024] (3) The oxygen content of copper and copper alloys prepared by existing water atomization is basically less than about 0.4%, while the oxygen content prepared by our company can be controlled between 1-5% according to key technical parameters such as flow control, and further through high-temperature airflow drying, the high-purity copper oxide and copper oxide alloy powder with an oxygen content of 10-15% is finally achieved, and the product does not contain acidic substances;

[0025] (4) The water atomization process for preparing copper oxide and copper oxide alloy powder, the high temperature roasting process for preparing copper oxide and copper oxide alloy powder, the gas atomization process for preparing copper oxide and copper oxide alloy powder, and the existing conventional water atomization process for preparing copper oxide and copper oxide alloy powder have lower costs and better product performance in the application field. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0027] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate directions or positional relationships only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Embodiment 1:

[0030] A method for preparing copper oxide and copper oxide alloy powder by water atomization comprises the following steps:

[0031] S1: Smelting of copper raw materials

[0032] S11: placing the copper raw material in a smelting medium frequency furnace, opening the gas station when smelting starts, maintaining a pressure of 0.01-0.05MPa and an air flow rate of 100-500L / s, so that the copper begins to melt;

[0033] S12: After the temperature in the smelting medium frequency furnace reaches 500°C, adjust the pressure to 0.08MPa and the air flow rate to 500L / s, so that the molten copper generates copper oxide;

[0034] S13: After the metal in the smelting medium frequency furnace is completely melted, the pressure is adjusted to 0.01-0.05MPa and the air flow rate is 100-500L / s to melt the copper into a molten metal state and stir the molten metal;

[0035] In steps S11 and S13, ventilation is performed so that the air pipeline is not blocked, and in step S12, ventilation is performed so that copper and air generate copper oxide.

[0036] Step S12 melts the copper to generate 1-5% copper oxide; Step S13 further dries the high-purity copper oxide and copper oxide alloy powder to 10% oxygen content through high-temperature airflow.

[0037] S2: Atomize the molten metal

[0038] The molten metal liquid is added into the atomizing barrel; an exhaust fan is arranged at the upper end of the wall of the atomizing barrel, and a mixed gas of oxygen and nitrogen is filled into the atomizing barrel; oxygen with a pressure of 0.1MPa is filled into the high-pressure water; the high-pressure water filled with oxygen enters the nozzle in the atomizing barrel through a high-pressure pump, and the nozzle adopts V-shaped spray or cone spray, and the nozzle sprays a high-speed and high-pressure water flow to form high-pressure atomized water, and the pressure of the high-pressure atomized water is 20MPa; the flow rate of the high-pressure atomized water is 400L / min, and the metal liquid flow is broken into mist and condensed; the metal droplets are cooled into copper oxide and copper oxide alloy powder at the lower end of the atomizing barrel, and the copper oxide and copper oxide alloy powder are collected.

[0039] The exhaust fan controls the air volume, basically exhausting water vapor; because water vapor is lighter than metal droplets, and the exhaust port is located above the atomization part, it is in the opposite direction of movement to the metal droplets, and the metal droplets have the momentum of atomization, so if the fan volume is small, the metal droplets will basically not be sucked out but the water vapor will be sucked out.

[0040] The process uses circulating water, which is not discharged. After atomization, the copper powder and water are separated by a centrifuge or filter press. The water then passes through a sedimentation tank and is added back into the atomization barrel, thus forming a reused water.

[0041] S3: The metal powder collected in step S2 is dried, crushed, sieved and packaged, and the oxygen content is still increased during the drying process. After packaging, the required copper oxide and copper oxide alloy powder can be obtained.

[0042] The metal powder finally obtained is spherical or nearly spherical, and the powder particle size is 300 meshes. The spherical or nearly spherical copper oxide and copper oxide alloy powder finally obtained can be used in the field of electronic grade industry. Compared with the chemical method preparation, it is purer and does not contain acid and other substances.

[0043] The high-purity spherical or nearly spherical copper oxide and copper oxide alloy powder with an oxygen content of 10% obtained by this process has a cost advantage compared with other calcination processes: since the copper oxide used for calcination is generally prepared from acidic waste materials, it cannot meet the purity requirements, and to prepare high-purity copper oxide and copper oxide alloy powders, the purchased raw materials basically belong to the atomized powder prepared at the front end of this process, that is, conventional water-atomized copper and copper alloy powders, and the oxygen content is basically below 0.4%. The oxygen content of the powder directly atomized by this process can reach between 1-5%, and then further dried by high-temperature airflow to achieve high-purity copper oxide and copper oxide alloy powder with an oxygen content of 10-15%; relatively speaking, the cost is reduced.

[0044] Embodiment 2:

[0045] A method for preparing copper oxide and copper oxide alloy powder by water atomization comprises the following steps:

[0046] S1: Smelting of copper raw materials

[0047] S11: placing the copper raw material in a smelting medium frequency furnace, opening the gas station when smelting starts, maintaining a pressure of 0.01-0.05MPa and an air flow rate of 100-500L / s, so that the copper begins to melt;

[0048] S12: After the temperature in the smelting medium frequency furnace reaches 500°C, adjust the pressure to 0.08MPa and the air flow rate to 800L / s, so that the molten copper generates copper oxide;

[0049] S13: After the metal in the smelting medium frequency furnace is completely melted, the pressure is adjusted to 0.01-0.05 MPa (specific values ​​of Example 2) and the air flow rate is 100-500 L / s to obtain copper smelted to a molten metal state and the molten metal is stirred;

[0050] The ventilation in steps S11 and S13 prevents the air pipeline from being blocked, and the ventilation in step S12 allows copper to react with air to generate copper oxide.

[0051] Step S12 melts the copper to generate 1-5% copper oxide; step S13 further dries the high-purity copper oxide and copper oxide alloy powder to 12% oxygen content through high-temperature airflow.

[0052] S2: Atomize the molten metal

[0053] The molten metal liquid is added into the atomizing barrel; an exhaust fan is arranged at the upper end of the wall of the atomizing barrel, and a mixed gas of oxygen and nitrogen is filled into the atomizing barrel; oxygen with a pressure of 0.1MPa is filled into the high-pressure water; the high-pressure water filled with oxygen enters the nozzle in the atomizing barrel through a high-pressure pump, and the nozzle adopts V-shaped spray or cone spray, and the nozzle sprays a high-speed and high-pressure water flow to form high-pressure atomized water, and the pressure of the high-pressure atomized water is 20MPa; the flow rate of the high-pressure atomized water is 350L / min, and the metal liquid flow is broken into mist and condensed; the metal droplets are cooled into copper oxide and copper oxide alloy powder at the lower end of the atomizing barrel, and the copper oxide and copper oxide alloy powder are collected.

[0054] The exhaust fan controls the air volume, basically exhausting water vapor; because water vapor is lighter than metal droplets, and the exhaust port is located above the atomization part, it is in the opposite direction of movement to the metal droplets, and the metal droplets have the momentum of atomization, so if the fan volume is small, the metal droplets will basically not be sucked out but the water vapor will be sucked out.

[0055] The process uses circulating water, which is not discharged. After atomization, the copper powder and water are separated by a centrifuge or filter press. The water then passes through a sedimentation tank and is added back into the atomization barrel, thus forming a reused water.

[0056] S3: The metal powder collected in step S2 is dried, crushed, sieved and packaged, and the oxygen content is still increased during the drying process. After packaging, the required copper oxide and copper oxide alloy powder can be obtained.

[0057] The metal powder finally obtained is spherical or nearly spherical, and the powder particle size is 300 meshes. The spherical or nearly spherical copper oxide and copper oxide alloy powder finally obtained can be used in the field of electronic grade industry. Compared with the chemical method preparation, it is purer and does not contain acid and other substances.

[0058] The high-purity spherical or nearly spherical copper oxide and copper oxide alloy powder with an oxygen content of 12% obtained by this process has a cost advantage compared with other calcination processes: since the copper oxide prepared by calcination is generally acidic waste, it cannot meet the purity requirement, and the raw materials purchased for the preparation of high-purity copper oxide and copper oxide alloy powders are basically atomized powders prepared at the front end of this process, that is, conventional water-atomized copper and copper alloy powders, and the oxygen content is basically below 0.4%, while the oxygen content of the powder directly atomized by this process can reach between 1-5%, and then further dried by high-temperature airflow to achieve high-purity copper oxide and copper oxide alloy powder with an oxygen content of 10-15%; relatively speaking, the cost is reduced.

[0059] In this water atomization preparation, since the heat capacity of gas is smaller than that of water, oxygen is mixed into water during the preparation atomization process. Due to the rapid cooling of the water medium, the grain size of water atomization will be more uniform than that of gas atomization. Gas atomization simply uses oxygen. When preparing copper oxide, it contains a large amount of pure oxygen. Oxygen is a combustion aid, which will cause the temperature inside the atomization barrel to be high, and the powder adhesion is relatively serious, resulting in copper powder sticking to the inner wall of the atomization barrel. At the same time, the powder particles stick to each other and are difficult to form a sphere or a nearly sphere. The cost of copper oxide powder prepared using this technical solution is lower than that of simple gas atomization; the cost of oxygen production in gas atomization pure oxygen production is relatively high, and the excess oxygen exists in the atomization barrel or is directly discharged, resulting in low oxygen utilization; and this technology is to control the use of oxygen content. After the excess water is discharged, it flows into the sedimentation tank, and the entire system is a closed circulation system. The cost is lower than that of simple gas atomization.

[0060] In this water atomization preparation, since the heat capacity of gas is smaller than that of water, oxygen is mixed into water during the preparation atomization process. Due to the rapid cooling of the water medium, the grain size of water atomization will be more uniform than that of gas atomization. Gas atomization simply uses oxygen. When preparing copper oxide, it contains a large amount of pure oxygen. Oxygen is a combustion aid, which will cause the temperature inside the atomization barrel to be high, and the powder adhesion is relatively serious, resulting in copper powder sticking to the inner wall of the atomization barrel. At the same time, the powder particles stick to each other and are difficult to form a sphere or a nearly sphere. The cost of copper oxide powder prepared using this technical solution is lower than that of simple gas atomization; the cost of oxygen production in gas atomization pure oxygen production is relatively high, and the excess oxygen exists in the atomization barrel or is directly discharged, resulting in low oxygen utilization; and this technology is to control the use of oxygen content. After the excess water is discharged, it flows into the sedimentation tank, and the entire system is a closed circulation system. The cost is lower than that of simple gas atomization.

[0061] Embodiment 3:

[0062] A method for preparing copper oxide and copper oxide alloy powder by water atomization comprises the following steps:

[0063] S1: Smelting of copper raw materials

[0064] S11: placing the copper raw material in a smelting medium frequency furnace, opening the gas station when smelting starts, maintaining a pressure of 0.01-0.05MPa and an air flow rate of 100-500L / s, so that the copper begins to melt;

[0065] S12: After the temperature in the smelting medium frequency furnace reaches 500°C, adjust the pressure to 0.08MPa and the air flow rate to 1000L / s, so that the molten copper generates copper oxide;

[0066] S13: After the metal in the smelting medium frequency furnace is completely melted, the pressure is adjusted to 0.01-0.05MPa and the air flow rate is 100-500L / s to melt the copper into a molten metal state and stir the molten metal;

[0067] In steps S11 and S13, ventilation is performed so that the air pipeline is not blocked, and in step S12, ventilation is performed so that copper and air generate copper oxide.

[0068] Step S12 melts the copper to generate 1-5% copper oxide; Step S13 further dries the high-purity copper oxide and copper oxide alloy powder to 15% oxygen content through high-temperature airflow.

[0069] S2: Atomize the molten metal

[0070] The molten metal liquid is added into the atomizing barrel; an exhaust fan is arranged at the upper end of the wall of the atomizing barrel, and a mixed gas of oxygen and nitrogen is filled into the atomizing barrel; oxygen with a pressure of 0.1MPa is filled into the high-pressure water; the high-pressure water filled with oxygen enters the nozzle in the atomizing barrel through a high-pressure pump, and the nozzle adopts V-shaped spray or cone spray, and the nozzle sprays a high-speed and high-pressure water flow to form high-pressure atomized water, and the pressure of the high-pressure atomized water is 20MPa; the flow rate of the high-pressure atomized water is 300L / min, and the metal liquid flow is broken into mist and condensed; the metal droplets are cooled into copper oxide and copper oxide alloy powder at the lower end of the atomizing barrel, and the copper oxide and copper oxide alloy powder are collected.

[0071] The exhaust fan controls the air volume, basically exhausting water vapor; because water vapor is lighter than metal droplets, and the exhaust port is located above the atomization part, it is in the opposite direction of movement to the metal droplets, and the metal droplets have the momentum of atomization, so if the fan volume is small, the metal droplets will basically not be sucked out but the water vapor will be sucked out.

[0072] The process uses circulating water, which is not discharged. After atomization, the copper powder and water are separated by a centrifuge or filter press. The water then passes through a sedimentation tank and is added back into the atomization barrel, thus forming a reused water.

[0073] S3: The metal powder collected in step S2 is dried, crushed, sieved and packaged, and the oxygen content is still increased during the drying process. After packaging, the required copper oxide and copper oxide alloy powder can be obtained.

[0074] The metal powder finally obtained is spherical or nearly spherical, and the powder particle size is 300 meshes. The spherical or nearly spherical copper oxide and copper oxide alloy powder finally obtained can be used in the field of electronic grade industry. Compared with the chemical method preparation, it is purer and does not contain acid and other substances.

[0075] The high-purity spherical or nearly spherical copper oxide and copper oxide alloy powder with an oxygen content of 15% obtained by this process has a cost advantage compared with other calcination processes: since the copper oxide used for calcination is generally prepared from acidic waste materials, it cannot meet the purity requirements, and to prepare high-purity copper oxide and copper oxide alloy powders, the purchased raw materials basically belong to the atomized powder prepared at the front end of this process, that is, conventional water-atomized copper and copper alloy powders, and the oxygen content is basically below 0.4%. The oxygen content of the powder directly atomized by this process can reach between 1-5%, and then further dried by high-temperature airflow to achieve high-purity copper oxide and copper oxide alloy powder with an oxygen content of 10-15%; relatively speaking, the cost is reduced.

[0076] In this water atomization preparation, since the heat capacity of gas is smaller than that of water, oxygen is mixed into water during the preparation atomization process. Due to the rapid cooling of the water medium, the grain size of water atomization will be more uniform than that of gas atomization. Gas atomization simply uses oxygen. When preparing copper oxide, it contains a large amount of pure oxygen. Oxygen is a combustion aid, which will cause the temperature inside the atomization barrel to be high, and the powder adhesion is relatively serious, resulting in copper powder sticking to the inner wall of the atomization barrel. At the same time, the powder particles stick to each other and are difficult to form a sphere or a nearly sphere. The cost of copper oxide powder prepared using this technical solution is lower than that of simple gas atomization; the cost of oxygen production in gas atomization pure oxygen production is relatively high, and the excess oxygen exists in the atomization barrel or is directly discharged, resulting in low oxygen utilization; and this technology is to control the use of oxygen content. After the excess water is discharged, it flows into the sedimentation tank, and the entire system is a closed circulation system. The cost is lower than that of simple gas atomization.

[0077] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for preparing copper oxide and copper oxide alloy powder by water atomization, characterized in that: The following steps are involved: S1: Smelting of copper raw materials S11: placing the copper raw material in a smelting device, opening the gas station when smelting starts, maintaining an air pressure of 0.01-0.05MPa and an air flow rate of 100-500L / s, so that the copper begins to melt; S12: After the temperature in the smelting equipment reaches 500° C., adjust the air pressure to 0.05-0.1 MPa and the air flow rate to 500-1000 L / s, so that the molten copper generates copper oxide; S13: After the metal in the smelting equipment is completely melted, the air pressure is adjusted to 0.01-0.05MPa and the air flow rate is 100-500L / s to melt the copper into a molten metal state and stir the molten metal; S2: The molten metal liquid is subjected to water atomization treatment. During the water atomization process, oxygen is filled into the high-pressure water, and a mixture of oxygen and nitrogen is filled into the atomization barrel; The specific steps of water atomization in step S2 are: adding molten metal liquid into an atomization barrel; filling the atomization barrel with a mixture of oxygen and nitrogen; filling high-pressure water with oxygen; the high-pressure water filled with oxygen enters the nozzle in the atomization barrel through a high-pressure pump, and the nozzle sprays a high-speed and high-pressure water flow to form high-pressure atomized water, and breaks the metal liquid flow into mist and condenses; the metal droplets are cooled at the lower end of the atomization barrel to form copper oxide and copper oxide alloy powder, and the copper oxide and copper oxide alloy powder are collected; S3: The metal powder collected in step S2 is dried, crushed, sieved and packaged, and the oxygen content is still increased during the drying process. After packaging, the required copper oxide and copper oxide alloy powder can be obtained.

2. The method for preparing copper oxide and copper oxide alloy powder by water atomization according to claim 1, characterized in that: An exhaust fan is arranged on the upper end of the wall of the atomizing barrel.

3. The method for preparing copper oxide and copper oxide alloy powder by water atomization according to claim 1, characterized in that: The water in the atomizing barrel is not discharged. After atomization, the copper powder and water are separated by a centrifuge or a filter press. Then the water passes through a sedimentation tank and the precipitated water is replenished into the water in the atomizing barrel to form a water cycle.

4. The method for preparing copper oxide and copper oxide alloy powder by water atomization according to claim 1, characterized in that: In step S2, oxygen with an intake pressure of 0.1 MPa is mixed into high-pressure water; the pressure of high-pressure atomized water is 15 MPa-25 MPa; and the flow rate of high-pressure atomized water is 300-450 L / min.

5. The method for preparing copper oxide and copper oxide alloy powder by water atomization according to claim 1, characterized in that: The nozzle adopts V-shaped spray or cone-shaped spray.

6. The method for preparing copper oxide and copper oxide alloy powder by water atomization according to claim 1, characterized in that: The smelting equipment is a medium frequency smelting furnace.