阅读说明：本技术 一种水雾化金属粉末干燥机及其使用方法 (Water atomization metal powder drying machine and use method thereof ) 是由 张根林 尉彦周 范立楠 李胜伟 于 2020-12-02 设计创作，主要内容包括：本发明涉及粉末冶金技术领域,更具体的,是一种水雾化金属粉末干燥机及其使用方法。干燥机包括包括机座、罐体、驱动系统、抽真空系统、控温系统；罐体设置为双层壳体结构；罐体设置有两个旋转接头,旋转接头分别设置在机座上；驱动系统与第二旋转接头连接,用以带动罐体转动；第一旋转接头轴向内部设置有空腔；该空腔与罐体的夹层空间连通；控温系统包括进热源管和进冷源管,进热源管和进冷源管与第一旋转接头的空腔连通并引设出,该控温系统用以向夹层空间内提供热源或冷源；第二旋转接头轴向内部设置有通道；抽真空系统贯穿该通道设置,用以对罐体抽真空。(The invention relates to the technical field of powder metallurgy, in particular to a water atomization metal powder drying machine and a using method thereof. The dryer comprises a base, a tank body, a driving system, a vacuum pumping system and a temperature control system; the tank body is of a double-layer shell structure; the tank body is provided with two rotary joints which are respectively arranged on the base; the driving system is connected with the second rotary joint and used for driving the tank body to rotate; a cavity is arranged in the first rotary joint axially; the cavity is communicated with the interlayer space of the tank body; the temperature control system comprises a heat source inlet pipe and a cold source inlet pipe, the heat source inlet pipe and the cold source inlet pipe are communicated with and led out of the cavity of the first rotary joint, and the temperature control system is used for providing a heat source or a cold source for the interlayer space; a channel is arranged in the second rotary joint axially; the vacuumizing system penetrates through the channel and is used for vacuumizing the tank body.)

1. A water atomization metal powder dryer is characterized by comprising a base, a tank body, a driving system, a vacuum pumping system and a temperature control system;

a feed inlet and a discharge outlet are formed in the tank body; the tank body is of a double-layer shell structure of an inner shell and an outer shell, and an interlayer space is formed between the inner shell and the outer shell;

the tank body is provided with a first rotary joint and a second rotary joint, and the first rotary joint and the second rotary joint are respectively arranged on the bases at two sides of the tank body; the driving system is connected with the second rotary joint and used for driving the tank body to rotate;

a cavity is arranged in the first rotary joint axially; the cavity is communicated with the interlayer space of the tank body;

the temperature control system comprises a heat source inlet pipe and a cold source inlet pipe, the heat source inlet pipe and the cold source inlet pipe are communicated with and led out of the cavity of the first rotary joint, and the temperature control system is used for providing a heat source or a cold source into the interlayer space;

a channel is arranged in the second rotary joint axially; the vacuumizing system penetrates through the channel and is used for vacuumizing the tank body.

2. The water-atomized metal powder dryer as claimed in claim 1, wherein the driving system comprises a motor, a speed reducer, and a sprocket chain, and the motor drives the speed reducer to be externally connected to the second rotary joint via the sprocket chain.

3. The water-atomized metal powder dryer as claimed in claim 2, wherein the vacuum pumping system comprises a vacuum tube, a vacuum pump and a double vacuum filter, the vacuum tube penetrates through the channel in the second rotary joint, and one end of the vacuum tube extends into the tank body while the other end extends out of the tank body; one end of the vacuum tube extending into the tank body is connected with the double vacuum filters, and the other end extending to the outside of the tank body is connected with the vacuum pump.

4. A water atomized metal powder dryer as claimed in claim 3, wherein the first rotary joint and the second rotary joint are provided at positions of a rotation axis of the can body; the channel on the second rotary joint is arranged at the axis position of the second rotary joint; the heat source inlet pipe is connected with a steam generator, and the steam generator is connected with a water storage tank; the cold source inlet pipe is connected with the water storage tank through a cold source water pump; and the heat source inlet pipe and the cold source inlet pipe are respectively provided with a heat source inlet electromagnetic valve and a cold source inlet electromagnetic valve.

5. The water-atomized metal powder dryer as claimed in claim 4, wherein a condensed water pipe is provided on the first rotary joint, one end of the condensed water pipe is connected to the channel, and the other end of the condensed water pipe extends to a reservoir; be provided with the heat extraction water pipe on the first rotary joint, heat extraction water pipe's one end with the passageway switch-on, the other end extends to the cistern.

6. A method of using a water atomized metal powder dryer, characterized by using the water atomized metal powder dryer of claim 5;

filling the mixed materials into the tank body;

starting the driving system, and driving a speed reducer to be connected with the outside of the second rotary joint through a chain wheel and a chain by a motor to drive the tank body to move;

controlling a temperature control system to supply heat to the interlayer space of the tank body so as to dry the materials;

controlling a vacuumizing system to vacuumize the interior of the tank body and discharge water in the tank body;

after the materials in the tank body are dried, the vacuumizing system stops running, the temperature control system is controlled to stop heating, cold water is supplied to the interlayer space of the tank body to cool the materials, and a heat extraction water pipe drains water;

and when the materials are cooled to room temperature, stopping the temperature control system and the driving system, and discharging the mixed materials from the tank body to special equipment.

7. The use method of the water atomization metal powder dryer as claimed in claim 6, wherein when the materials are dried, a heating switch of a steam generator is turned on, a heat inlet source electromagnetic valve is automatically turned on, steam enters the interlayer space of the tank body through a heat inlet source pipe, and a driving system and a vacuum pumping system are simultaneously started to start drying the materials, wherein the steam temperature is about 140 ℃ and the pressure is 0.3-0.4 MPa.

8. The use method of the water atomized metal powder dryer as claimed in claim 7, wherein during the drying process, the vacuum degree is maintained at 0.6-0.8MPa, and when the moisture content of the air pumped by the vacuum pump is less than 0.2%, it is determined that the materials in the tank are in a dry state, and at this time, the steam generator is turned off and the heating is stopped.

9. The use method of the water atomization metal powder drying machine as claimed in claim 8, wherein when the material is cooled, the temperature control system is controlled to enable cold water in the water reservoir to enter the interlayer space of the tank body through the cold source water pump and the cold source inlet pipe.

Technical Field

The invention relates to the technical field of powder metallurgy, in particular to a water atomization metal powder drying machine and a using method thereof.

Background

At present, the metal powder needs to have basic characteristics of spherical particles (the sphericity is more than 98 percent, and the metal powder is less than or equal to hollow powder, satellite powder, bonding powder and the like), narrow particle size distribution (D50 is less than or equal to 45 mu m), low oxygen content (less than 100ppm), high apparent density, low impurity content (the impurity content is not higher than that of a mother alloy and no ceramic inclusion) and the like. Therefore, the technical requirements for the pulverization of the metal powder and the pulverization equipment are determined to be very high. Most of the existing metal powder equipment adopts a gas atomization mode, but due to the structural problem, the air flow speed and pressure sprayed by the traditional gas atomization equipment cannot be carried out in a high-pressure state, so that the produced metal powder not only reaches a fine powder state, but also cannot form a high sphere or an approximate sphere, the powder cannot be continuously produced, and the produced metal powder is not dry enough in moisture and low in quality. Therefore, the existing powder manufacturing equipment needs to be improved.

Disclosure of Invention

The invention aims to provide a water atomization metal powder drying machine which is efficient and energy-saving. Through using this application, the moisture of the metal powder of output is dry, and the quality is higher.

In order to achieve the purpose, the invention provides the following technical scheme:

a water atomization metal powder dryer is characterized by comprising a base, a tank body, a driving system, a vacuum pumping system and a temperature control system;

a feed inlet and a discharge outlet are formed in the tank body; the tank body is of a double-layer shell structure of an inner shell and an outer shell, and an interlayer space is formed between the inner shell and the outer shell;

the tank body is provided with a first rotary joint and a second rotary joint, and the first rotary joint and the second rotary joint are respectively arranged on the bases at two sides of the tank body; the driving system is connected with the second rotary joint and used for driving the tank body to rotate;

a cavity is arranged in the first rotary joint axially; the cavity is communicated with the interlayer space of the tank body;

the temperature control system comprises a heat source inlet pipe and a cold source inlet pipe, the heat source inlet pipe and the cold source inlet pipe are communicated with and led out of the cavity of the first rotary joint, and the temperature control system is used for providing a heat source or a cold source into the interlayer space;

a channel is arranged in the second rotary joint axially; the vacuumizing system penetrates through the channel and is used for vacuumizing the tank body.

Furthermore, the driving system comprises a motor, a speed reducer and a chain wheel chain, wherein the motor drives the speed reducer to be externally connected with the second rotating joint through the chain wheel chain.

Furthermore, the vacuum pumping system comprises a vacuum tube, a vacuum pump and a double-vacuum filter, the vacuum tube penetrates through a channel in the second rotary joint, one end of the vacuum tube extends into the tank body, and the other end of the vacuum tube extends to the outside of the tank body; one end of the vacuum tube extending into the tank body is connected with the double vacuum filters, and the other end extending to the outside of the tank body is connected with the vacuum pump.

Further, the first rotary joint and the second rotary joint are arranged at the position of a rotary shaft of the tank body; the channel on the second rotary joint is arranged at the axis position of the second rotary joint; the heat source inlet pipe is connected with a steam generator, and the steam generator is connected with a water storage tank; the cold source inlet pipe is connected with the water storage tank through a cold source water pump; and the heat source inlet pipe and the cold source inlet pipe are respectively provided with a heat source inlet electromagnetic valve and a cold source inlet electromagnetic valve.

Furthermore, a condensate pipe is arranged on the first rotary joint, one end of the condensate pipe is communicated with the channel, and the other end of the condensate pipe extends to the reservoir; be provided with the heat extraction water pipe on the first rotary joint, heat extraction water pipe's one end with the passageway switch-on, the other end extends to the cistern.

A method of using a water atomized metal powder dryer, characterized by using the water atomized metal powder dryer of claim 5;

filling the mixed materials into the tank body;

starting the driving system, and driving a speed reducer to be connected with the outside of the second rotary joint through a chain wheel and a chain by a motor to drive the tank body to move;

controlling a temperature control system to supply heat to the interlayer space of the tank body so as to dry the materials;

controlling a vacuumizing system to vacuumize the interior of the tank body and discharge water in the tank body;

after the materials in the tank body are dried, the vacuumizing system stops running, the temperature control system is controlled to stop heating, cold water is supplied to the interlayer space of the tank body to cool the materials, and a heat extraction water pipe drains water;

and when the materials are cooled to room temperature, stopping the temperature control system and the driving system, and discharging the mixed materials from the tank body to special equipment.

Further, when the materials are dried, a heating switch of the steam generator is turned on, the heat source inlet electromagnetic valve is automatically turned on, steam enters the interlayer space of the tank body through the heat source inlet pipe, the driving system and the vacuum pumping system are simultaneously started, and the materials begin to be dried, wherein the steam temperature is about 140 ℃, and the pressure is 0.3-0.4 MPa.

Furthermore, in the process of drying the materials, the vacuum degree is maintained at 0.6-0.8MPa, and when the moisture content of the air pumped out by the vacuum pump is less than 0.2%, the materials in the tank body are determined to be in a dry state, and at the moment, the steam generator is closed, and the heating is stopped.

Furthermore, when the materials are cooled, the temperature control system is controlled to enable cold water in the reservoir to enter the interlayer space of the tank body through the cold source water pump and the cold source inlet pipe.

The beneficial effect of this application:

in this application, it is the same with advancing cold source pipe position to advance the heat source pipe, designs for the tee bend, and the comdenstion water position is the same with the exhaust water position, designs for the tee bend. And the discharged hot water flows into the radiator, and the cooled cold water enters the interlayer of the tank body through the cold inlet pipe, so that the cooled water is recycled. The vacuum filter is designed into two ends, the main pipeline of the vacuum filter is not changed, the part entering the tank body is designed into a three-way type, the filter is prevented from being blocked by metal powder, and the air extraction efficiency is improved. Through using this application, the moisture of the metal powder of output is dry, and the quality is higher.

Drawings

Fig. 1 is a schematic overall structure diagram of the present application.

Fig. 2 is a schematic top view of the can body of the present application.

Fig. 3 is a left side view structural diagram of the tank of the present application.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

With reference to the accompanying drawings, the water atomization metal powder drying machine disclosed by the application comprises a machine base 2, a tank body 1, a driving system, a vacuum pumping system and a temperature control system.

A feed inlet and a discharge outlet are formed in the tank body 1; the tank body 1 is of a double-layer shell structure of an inner shell and an outer shell, and an interlayer space is formed between the inner shell and the outer shell; the feed inlet and the discharge outlet of the tank body 1 are provided with flange seals.

The tank body 1 is provided with a first rotary joint 21 and a second rotary joint 22, and the first rotary joint 21 and the second rotary joint 22 are respectively arranged on the machine base 2 at two sides of the tank body 1; the first rotary joint 21 and the second rotary joint 22 are arranged at the position of a rotating shaft of the tank body 1; a cavity is arranged inside the first rotating joint 21 in the axial direction; the cavity is communicated with the interlayer space of the tank body 1; the passage of the second rotary joint 22 is arranged at its axial center.

The driving system is connected with the second rotary joint 22 and is used for driving the tank body 1 to rotate; the driving system comprises a motor 51, a speed reducer 52 and a sprocket chain 61, wherein the motor 51 drives the speed reducer 52 to be externally connected with the second rotating joint 22 through the sprocket chain 61.

The temperature control system comprises a heat source inlet pipe 32 and a cold source inlet pipe 36, the heat source inlet pipe 32 and the cold source inlet pipe 36 are communicated with and led out of the cavity of the first rotary joint 21, and the temperature control system is used for providing a heat source or a cold source for the interlayer space; the heat source inlet pipe 32 is connected with a steam generator 33, and the steam generator 33 is connected with a water reservoir 34; the cold source inlet pipe 36 is connected to the water reservoir 34 via the cold source water pump 35. The heat source inlet pipe 32 and the cold source inlet pipe 36 are respectively provided with a heat source inlet electromagnetic valve 31 and a cold source inlet electromagnetic valve 37. A condensate pipe 38 is disposed on the first rotary joint 21, one end of the condensate pipe 38 is connected to the channel, and the other end extends to the reservoir 34. A heat removal water pipe is arranged on the first rotary joint 21, one end of the heat removal water pipe is communicated with the channel, and the other end of the heat removal water pipe extends to the reservoir 34.

The second rotary joint 22 is provided with a channel axially inside; the vacuum-pumping system penetrates through the channel and is used for pumping vacuum to the tank body 1, the vacuum-pumping system comprises a vacuum tube 41, a vacuum pump 42 and a double vacuum filter 43, the vacuum tube 41 penetrates through the channel in the second rotary joint 22, one end of the vacuum tube 41 extends into the tank body 1, and the other end of the vacuum tube extends to the outside of the tank body 1; one end of the vacuum pipe 41 extending into the tank body 1 is connected with the double vacuum filter 43, and one end extending to the outside of the tank body 1 is connected with the vacuum pump 42. The vacuum pipe 41 is provided with a vacuum pressure gauge 44.

Referring to the attached drawings, the water atomization metal powder drying machine in the embodiment of the application comprises a machine base 2 and a tank body 1, wherein a feeding hole and a discharging hole are formed in the tank body 1; the tank body 1 is of a double-layer shell structure with an inner shell and an outer shell, and an interlayer space is formed between the inner shell and the outer shell. The machine base 2 is provided with a first rotary joint 21 and a second rotary joint 22, and the first rotary joint 21 and the second rotary joint 22 are respectively connected with two ends of the tank body 1.

The first rotary joint 21 is provided with a channel axially inside; a heat source inlet pipe 32 is arranged at the first end of the first rotary joint 21 far away from the tank body 1, and the heat source inlet pipe 32 can be communicated with the channel; a cold inlet pipe 36 is arranged at the first end of the first rotary joint 21 far away from the tank body 1, and the cold inlet pipe 36 can be communicated with the channel; the heat source inlet pipe 32, the cold source inlet pipe 36 and the passage form a three-way structure. The first rotary joint 21 is communicated with the outer shell of the tank body 1 near the second end of the tank body 1; the channel is communicated with an interlayer space between the inner shell and the outer shell. A condensate pipe 38 is arranged on the side wall of the first rotary joint 21, and the condensate pipe 38 can be communicated with the channel. A vacuum pipe 41 penetrating through the second rotary joint 22 is arranged axially and internally; one end of the vacuum pipe 41 is provided with a double vacuum filter 43, and the double vacuum filter 43 is arranged inside the tank body 1; the other end of the vacuum tube 41 is provided with a vacuum pressure gauge 44; the vacuum filter is provided with two filter heads; the two filter heads and the vacuum tube 41 form a three-way structure.

In the embodiment, the framework support of the engine base 2 is welded by channel steel, the surface of the framework is brushed with anti-rust paint, and the stainless steel panel is wrapped outside the framework; the machine base 2 has reasonable mechanism and high bearing capacity, and ensures the stable operation of the equipment. The driving system consists of a three-kilowatt motor 51, a speed reducer 52 and a chain wheel and chain 61, and is simple in design and stable and reliable in operation. The inner shell and the outer shell of the tank body 1 are both made of 304L stainless steel, and are welded by argon arc welding and polished. Avoids polluting the dried substances and can be used in a clean area of 100 ten thousand levels. The tank body 1 has good sealing performance, is smooth and bright without dead angles, reduces residue and is easy to clean. The material inlet and outlet are sealed by flanges, so that the operation is convenient and the sealing performance is good. The vacuum-pumping system is arranged at the position of a rotating shaft of the tank body 1, and a vacuum-pumping vacuum pipe 41 is arranged at the shaft center by utilizing the characteristic that the shaft center position of the vacuum-pumping vacuum pipe cannot move along with the rotation of the tank body 1, is connected with the inner part and the outer part of the tank body 1, and is provided with a sealing seat 45 at the joint. Under the high temperature state, the moisture in the internal material evaporates in the tank body 1, the vacuum pump 42 pumps the steam inside to the outside through the pipeline leading to the inside of the tank body 1, and the steam forms condensed water when meeting cold in the pumping process because the outside temperature is only room temperature. In the drying process, the material in the tank body 1 can be determined to be in a dry state after 10 minutes along with the reduction of the condensed water. After the powder is dried, the cold source water pump 35 can accelerate the oxidation of the powder when the hot powder meets the moisture in the air if the discharge port is opened immediately due to the high temperature of the powder. If the powder is taken out after waiting for the powder to cool to room temperature, the time may last more than 30 minutes, and the work efficiency may be reduced. Thus, after the powder is dried, the evacuation system is stopped. And (3) turning on the cold source water pump 35, injecting room temperature water into the interlayer of the tank body 1 from the cold source inlet pipe 36, enabling hot water to flow out along with the injection of cold water, cooling the powder in the tank body 1 to room temperature within 10 minutes, and reducing the oxidation of the powder after the powder is contacted with air by opening the discharge hole. After the tank body 1 is filled with the materials to be dried, the heat inlet source pipe 32 is turned on, the steam generator 33 is turned on to heat the switch, the heat inlet source electromagnetic valve 31 is automatically turned on, steam enters the interlayer of the tank body 1 through the heat inlet source pipe 32, and the tank body 1 and the vacuum pump 42 are simultaneously started to start drying the materials. After the material is dried in the cold source pipe 36 (the moisture content of the air pumped out by the vacuum pump 42 is less than 0.2%, and the same material is dried for a fixed time), the steam generator 33 is turned off, and the heating is stopped. The room temperature water enters the interlayer of the tank body 1 through the cold inlet pipe 36 by the water pump, and the material is rapidly cooled to the room temperature.

A method of using a water atomized metal powder dryer, characterized by using the water atomized metal powder dryer of claim 5;

filling the mixed materials into the tank body;

starting the driving system, and driving a speed reducer to be connected with the outside of the second rotary joint through a chain wheel and a chain by a motor to drive the tank body to move;

controlling a temperature control system to supply heat to the interlayer space of the tank body so as to dry the materials;

controlling a vacuumizing system to vacuumize the interior of the tank body and discharge water in the tank body;

after the materials in the tank body are dried, the vacuumizing system stops running, the temperature control system is controlled to stop heating, cold water is supplied to the interlayer space of the tank body to cool the materials, and a heat extraction water pipe drains water;

and when the materials are cooled to room temperature, stopping the temperature control system and the driving system, and discharging the mixed materials from the tank body to special equipment.

When materials are dried, a heating switch of a steam generator is turned on, a heat source inlet electromagnetic valve is automatically turned on, steam enters an interlayer space of the tank body through a heat source inlet pipe, a driving system and a vacuumizing system are started at the same time, and the materials are dried, wherein the steam temperature is about 140 ℃ and the pressure is 0.3-0.4 MPa.

In the process of drying the materials, the vacuum degree is maintained at 0.6-0.8MPa, when the moisture content of the air pumped out by the vacuum pump is less than 0.2%, the materials in the tank body are determined to be in a dry state, at the moment, the steam generator is closed, and the heating is stopped.

When the materials are cooled, the temperature control system is controlled to enable cold water in the reservoir to enter the interlayer space of the tank body through the cold source water pump and the cold source inlet pipe.

In this application, 3kW motor 51 for equipment power drives speed reducer 52 through belt drive, and speed reducer 52 and jar body 1 are within a definite time by chain drive. The rotary joint is fixed relative to the machine body and is connected with the rotating shaft of the tank body 1. When drying, the water vapor enters the cold and hot medium cavity of the tank body 1 through the heat source inlet pipe 32 and the rotary joint to heat the powder, and the wet powder is heated to volatilize the water vapor which is pumped away by the vacuum pump 42 through the double vacuum filter 43.

In the application, the steam generator 33 generates steam which is heated to (about 140 ℃)0.3-0.4MPa, the electromagnetic valve at the end of the heat inlet source pipe 32 is opened when drying is needed, and the steam enters the cold and hot medium cavity of the tank body 1 to heat the powder. The temperature of the tank body 1 is reduced to normal temperature, the electromagnetic valve at the end of the heat inlet source pipe 32 is closed, the electromagnetic valve at the end of the cold inlet source pipe 36 and the water pump at the end of the cold inlet source pipe 36 are opened, the room temperature water is used for reducing the temperature of the powder through the cold and heat medium cavity of the tank body 1 for about 10 minutes to the room temperature, and the powder is put into a special container.

In this application, the vacuum pumping system is composed of a double vacuum filter 43, a vacuum pipe 41, a vacuum pressure gauge 44, a vacuum negative pressure safety valve (0.8MPa), and a vacuum pump 42.

In the application, the vacuum degree is required to be 0.6-0.8MPa, water vapor is heated and volatilized from the powder through the cold and hot medium cavity of the tank body 1, and the water vapor is discharged by the vacuum system through the double vacuum filter 43, so that the aim of drying the powder is fulfilled.

In this application, the heat source pipe 32 and the cold source pipe 36 are designed to be a three-way pipe, and the condensed water position is designed to be a three-way pipe. The tee joint is designed mainly for making full use of the axis position of the tank body 1, and the operation of the tank body 1 in the working process does not influence the work of a pipeline. And the discharged hot water flows into the radiator, and the cooled cold water enters the interlayer of the tank body 1 through the cold inlet pipe 36, so that the cooled water is recycled. The vacuum filter is designed into two ends, the main pipeline of the vacuum filter is not changed, the part entering the tank body 1 is designed into a three-way type, the filter is prevented from being blocked by metal powder, and the air extraction efficiency is improved. In the drier, the powder is influenced by gravity along with the rotation of the equipment, the metal powder can continuously move to the lower part of the tank body 1, the powder is continuously stirred to be uniformly heated, and the drying efficiency of the powder is improved. However, in the process of continuous rolling of the metal powder, the ultrafine metal powder which is easy to dry is inevitably lifted by force and is adhered to the surface of the filter, so that the air extraction efficiency is reduced, and the drying efficiency is reduced. The filter is designed into two heads, the main pipeline of the vacuum filter is unchanged, and the part entering the tank body 1 is designed into a three-way type, so that the filter is prevented from being blocked by metal powder, and the air extraction efficiency is improved.

In this application, still be provided with control panel 61 on the frame for centralized control.

Taking iron-silicon-chromium powder as an example, the particle size interval of the whole powder is as follows: 5 microns for D10, 23 microns for D50 and 83 microns for D90. When the metal powder is dried, the drying time of a conventional dryer originally used by the company is about 240min, and the drying time of a water atomization metal powder dryer using the water atomization metal powder dryer is about 200min, so that the water atomization metal powder dryer has a high energy-saving effect. The drying time is reduced by 16.67%, which is significant for high efficiency and energy saving. According to the calculation of the delivery quantity of 10 tons/day, 20 drying devices disclosed by the invention can replace 24 traditional drying devices, the electric energy is saved by 2400 degrees every day, the electricity is saved by 72 ten thousand degrees every year according to the calculation of the production time of 300 days, and the electricity charge is expected to be saved by 36 ten thousand yuan/year. The oxygen content of the powder after the original drying is about 3100PPM, and the oxygen content of the powder after the drying is about 2800PPM after the application, so that the oxygen content is obviously reduced. The range of applications for metal powders includes, but is not limited to, injection molding, press molding, diamond tooling and additive manufacturing, among others, where the oxygen content of the powder has a large impact on the density, corrosion resistance and strength of the article. Because the application fields and the forming modes are different, the oxygen content of the powder is reduced by 300ppm through comprehensive analysis, and the physical index of the powder is at least improved by 10 percent.

While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.