CN112139511A - Continuous feeding device and method for gas atomization powder preparation - Google Patents
Continuous feeding device and method for gas atomization powder preparation Download PDFInfo
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- CN112139511A CN112139511A CN202011051514.1A CN202011051514A CN112139511A CN 112139511 A CN112139511 A CN 112139511A CN 202011051514 A CN202011051514 A CN 202011051514A CN 112139511 A CN112139511 A CN 112139511A
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- 239000000843 powder Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000009689 gas atomisation Methods 0.000 title claims abstract description 27
- 238000003723 Smelting Methods 0.000 claims abstract description 84
- 239000002184 metal Substances 0.000 claims abstract description 49
- 239000002994 raw material Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 34
- 230000001681 protective effect Effects 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims description 24
- 230000008018 melting Effects 0.000 claims description 24
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000008188 pellet Substances 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 13
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 26
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000000889 atomisation Methods 0.000 description 7
- 229910052786 argon Inorganic materials 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000010924 continuous production Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241001417490 Sillaginidae Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0888—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid casting construction of the melt process, apparatus, intermediate reservoir, e.g. tundish, devices for temperature control
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention discloses a gas atomization powder preparation continuous feeding device and method, which comprises a smelting chamber, a feeding chamber and an atmosphere protection system, wherein a crucible and a tundish are arranged in the smelting chamber, a material pouring mechanism for pouring materials to the tundish is arranged on one side of the crucible, the feeding chamber is arranged on the smelting chamber, a feeding hole and a discharging hole are formed in the feeding chamber, the feeding chamber is also internally provided with the feeding system, the feeding system is used for directly conveying metal raw materials fed from the discharging hole into the crucible, and the atmosphere protection system is used for enabling the smelting chamber and the feeding chamber to reach a vacuum or protective gas protection state. The feeding system and the feeding chamber are separately arranged, the feeding system does not occupy the space of the feeding chamber, the volume of the preparation feeding chamber is reduced, the atmosphere protection system is favorable for rapidly enabling the atmosphere of the feeding chamber and the atmosphere of the smelting chamber to be the same in the feeding process, the working time of the atmosphere protection system is shortened, the consumption of protective gas is reduced, and the smelting cost is reduced.
Description
Technical Field
The invention relates to the field of metal powder preparation, in particular to a gas atomization powder preparation continuous feeding device and method.
Background
The gas atomization powder preparation is a high-efficiency and low-cost powder preparation method, and the prepared powder has high sphericity and low oxygen content. Through continuous development, the spherical powder prepared by the existing atomization powder preparation method reaches more than 80% of the total powder yield. The principle is briefly described as heating and melting raw materials in a crucible into liquid, pouring the liquid into a tundish to form a vertical liquid flow, and simultaneously crushing a liquid column into powder through high-pressure gas flow. The specific flow comprises vacuum pumping, protective gas inflation, raw material smelting and powder atomization, and the commonly used high-pressure gas is nitrogen and argon.
In the process of preparing powder by gas atomization, the yield of each furnace depends on the weight of raw materials once put into the crucible. After each furnace operation is finished, the smelting chamber needs to be opened for feeding again after the equipment is cooled, the processes of vacuumizing the equipment, filling protective gas and heating and smelting are repeated, the process is complicated and time-consuming, the loss of part of disposable parts is caused in the cooling process, and the production efficiency of the equipment is seriously influenced.
The chinese patent application No. 201910609312.5 discloses an atomizing continuous feeding method, which can gradually release a metal bar placed on a fixing device in advance, and melt the metal bar by moving down a clamping device, thereby realizing continuous production of metal powder. However, the method is limited to preparing the bar into the metal powder, the selected bar needs to meet the size range which can be clamped by the fixing device, the situation of mixing and feeding of various raw materials cannot be realized, and the application field is limited. The invention patent of China with application number 201410346840.3 discloses vacuum or gas protection smelting and pouring equipment for continuous production, wherein smelting materials are loaded into a crucible of an induction heating smelting furnace body through a displacement chamber type sealing feeding device, the displacement chamber type sealing feeding device can be used as a smelting intermediate material, two furnace doors and two furnace bodies are arranged at two ends of a vacuum smelting chamber, and the vacuum/gas protection smelting and pouring equipment forms a four-set smelting furnace structure form. However, the equipment can be atomized to prepare powder only by opening the vacuum smelting chamber, and metal dust in the vacuum smelting chamber can enter external air at the same time after the furnace door is opened at high temperature, so that the equipment is easy to cause damage to operators and has potential safety hazard; meanwhile, the crucible is moved out of the furnace body to cause the temperature reduction, the reheating is needed for the re-charging smelting, in addition, the furnace body needs to be further vacuumized and filled with inert gas, and the repeated opening of the furnace is needed for multiple times of smelting to cause the reduction of the smelting powder-making efficiency. In addition, the Chinese patent with application number 201711392783.2 discloses a vacuum melting chamber capable of continuously feeding and a metal atomization powder making device composed of the vacuum melting chamber, wherein continuous feeding is realized by moving a lifting device in a vacuum seal box and a melting cylinder, but the continuous feeding mechanism can not be opened to continuously feed in the feeding process of the lifting device, the continuous feeding mechanism is opened after the feeding is finished, raw materials are put in and vacuum pumping operation is performed, the volume quantity to be vacuumized is large, the applicability to the use scene of multi-stage feeding melting is poor, the continuous feeding mechanism is arranged in a feeding port right above the melting chamber, a temperature acquisition module for acquiring the temperature of the melting chamber is usually arranged above the melting chamber, the feeding mode is easy to interfere with the temperature acquisition module, the temperature acquisition module is moved to other areas of the device, the temperature data acquisition is easy to cause inaccuracy, and meanwhile, feeding personnel are inconvenient to feed the material, the convenience of use is poor.
In summary, the feeding device for gas atomization powder preparation needs to be improved to solve the above problems.
Disclosure of Invention
The invention provides a gas atomization powder preparation continuous feeding device and method for solving the technical problems, solves the problem that the smelting powder preparation efficiency is reduced due to repeated furnace opening during multiple smelting, can realize mixed feeding of various raw materials according to actual application scenes in the smelting process, and has wide feeding time under the use scene of multi-stage feeding.
The invention provides a gas atomization powder preparation continuous feeding device which comprises a smelting chamber, a feeding chamber and an atmosphere protection system, wherein a crucible and a tundish are arranged in the smelting chamber, a material pouring mechanism used for pouring materials to the tundish is arranged on one side of the crucible, the feeding chamber is arranged on the smelting chamber, a feeding hole and a discharging hole are formed in the feeding chamber, the feeding chamber is also internally provided with the feeding system, the feeding system is used for directly conveying metal raw materials fed from the discharging hole into the crucible, and the atmosphere protection system is used for enabling the smelting chamber and the feeding chamber to reach a vacuum or protective gas protection state.
Further, the feeding system comprises a feeding device and a driving assembly, and the feeding device is connected with the driving assembly.
Further, the feeding device is of any one of a caterpillar track structure, a circular tube structure and a flat plate structure.
Furthermore, the feeding device is of a flat plate structure, a feeding groove for guiding the metal raw material to slide to the crucible is arranged on the flat plate structure, and the feeding groove is in one of an arc shape, a V shape and a U shape.
Furthermore, the feeding chamber is arranged on one side above the crucible or on the side wall of the melting chamber.
Further preferably, the device also comprises a control system and a discharge port driving piece, wherein the control system is electrically connected with the discharge port driving piece, the feeding system and the atmosphere protection system.
Further, the atmosphere protection system comprises a vacuum pump, a protective gas bottle, a smelting chamber vacuum sensor and a feeding chamber vacuum sensor which are respectively arranged in the smelting chamber and the feeding chamber, a control valve is arranged on the protective gas bottle, and the vacuum pump and the protective gas bottle are communicated with the feeding chamber.
A continuous feeding method based on a gas atomization powder preparation continuous feeding device comprises the following steps:
s1, batching: placing the required metal raw material in a crucible, and smelting after the atmosphere in a smelting chamber meets the smelting requirement through an atmosphere protection system;
s2, adding materials: closing a discharge port of the feeding chamber, adding a metal raw material to be smelted from the feed port, closing the feed port, opening the discharge port to deliver the metal raw material to be smelted to the feeding system after the atmosphere in the feeding chamber is the same as that in the smelting chamber through an atmosphere protection system, and closing the discharge port;
and S3, conveying the metal raw material to be smelted into the crucible by the feeding system according to the smelting time sequence of the crucible.
Preferably, in step S2, the metallic raw material to be smelted is pretreated into a lump or a ball shape.
Further specifically, the metal raw material to be smelted is pretreated into blocks or balls, and the single mass of the metal raw material is not more than 3 Kg.
Further, the state of the atmosphere in the melting chamber is any one of a vacuum state, a nitrogen protection state and an argon protection state.
The invention has the following advantages:
1. the feeding system and the feeding chamber are separately arranged, the feeding system does not occupy the space of the feeding chamber, the volume of the preparation feeding chamber is reduced, the atmosphere protection system is favorable for rapidly enabling the atmosphere of the feeding chamber and the atmosphere of the smelting chamber to be the same in the feeding process, the working time of the atmosphere protection system is shortened, the consumption of protective gas is reduced, and the smelting cost is reduced.
2. Can realize multistage reinforced through the system of throwing material, the material can be thrown to the batch charging room in the sustainable in-process that feeds, does not receive reinforced time constraint, and the flexibility of reinforced time is better, can realize simultaneously that two-stage or multistage wait to drop into the preparation of raw and other materials.
3. The smelting chamber and the feeding chamber can reach a vacuum or protective gas protection state through the atmosphere protection system, protective gas is selected according to the scene requirement of powder preparation, the method is suitable for different types of smelting atomization powder making, and the application range is wide.
4. The feeding chamber can be arranged on the side wall of the smelting chamber, so that the convenience in the feeding process is improved, and the feeding from the side wall of the large smelting chamber is more safe.
5. The crucible can be continuously arranged in the smelting chamber, atomization powder preparation can be continuously carried out, potential safety hazards caused by opening the smelting chamber at a high temperature can be avoided, and meanwhile, the production efficiency is high.
6. The device simple structure, degree of automation is high, treats the metal raw and other materials of smelting and pretreats into small-size cubic, is difficult for causing the crucible to damage when throwing the material, promotes and smelts efficiency, has higher industrial application and worth.
Drawings
FIG. 1 is a schematic view showing a configuration of a continuous feeding apparatus for gas atomization milling in example 1;
FIG. 2 is a schematic view of the continuous feeding apparatus for gas atomization milling in example 3.
Wherein, 1-a smelting chamber; 2-a feeding chamber; 3-a feed inlet; 4-a discharge hole; 5-a vacuum pump; 6-crucible; 7-protective gas bottle; 8-a material pouring mechanism; 9-a control system; 10-a feeding system; 11-batch chamber vacuum sensor; 12-a melting chamber vacuum sensor; 13-an atmosphere protection system; 14-a feeding device; 15-a drive assembly; 16-a metal starting material; 17-a tundish; 18-a temperature acquisition module; 19-control valve.
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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
As shown in fig. 1, a continuous feeding device for gas atomization powder preparation comprises a melting chamber, a feeding chamber and an atmosphere protection system, wherein the melting chamber is internally provided with a crucible and a tundish, one side of the crucible is provided with a material pouring mechanism for pouring materials to the tundish, the feeding chamber is arranged on the melting chamber, the feeding chamber is provided with a feeding port and a discharging port, the feeding port is communicated with the feeding chamber and the outside for feeding materials conveniently, the discharging port is used for communicating the feeding chamber with the melting chamber, the feeding chamber is also internally provided with the feeding system, the feeding system is used for directly conveying metal raw materials fed by the discharging port into the crucible, and the atmosphere protection system is used for enabling the melting chamber and the feeding chamber to reach a protective gas protection state.
The feeding system comprises a feeding device and a driving assembly, and the feeding device is connected with the driving assembly.
The automatic feeding device is characterized by further comprising a control system and a discharging port driving piece, wherein the control system is electrically connected with the discharging port driving piece, the feeding system and the atmosphere protection system, the discharging port driving piece is a threaded electric push rod, the control system controls the opening and the closing of the discharging port, and in another embodiment, the feeding port is also provided with an electric push rod, and the control system controls the opening and the closing of the feeding port.
The atmosphere protection system comprises a vacuum pump, a protective gas bottle, a smelting chamber vacuum sensor and a feeding chamber vacuum sensor, wherein the smelting chamber vacuum sensor and the feeding chamber vacuum sensor are respectively arranged in a smelting chamber and a feeding chamber, a control valve is arranged on the protective gas bottle, the vacuum pump and the protective gas bottle are communicated with the feeding chamber, and the communication mode adopts a gas pipe for communication.
A continuous feeding method based on a gas atomization powder preparation continuous feeding device comprises the following steps:
s1, batching: placing a required metal raw material in a crucible, smelting after the atmosphere in a smelting chamber meets the smelting requirement through an atmosphere protection system, adjusting the atmosphere in the smelting chamber, closing a feed inlet, opening a discharge outlet, vacuumizing the smelting chamber and a feeding chamber to a preset vacuum degree, stopping vacuumizing, and introducing protective gas, wherein the atmosphere in the smelting chamber is in an argon protection state, high-purity argon with the purity of more than 99.9 percent is adopted, and the argon is suitable for preparing metal powder with the requirement on nitrogen content;
s2, adding materials: closing a discharge port of a feeding chamber, pretreating metal raw materials to be smelted into blocks or spheres, wherein the mass of each metal raw material is not more than 3Kg, so that the crucible is prevented from being damaged due to too large mass in the feeding process, closing a feed port after the metal raw materials to be smelted are added from the feed port, enabling the atmosphere in the feeding chamber to be the same as that in a smelting chamber through an atmosphere protection system, and adjusting the atmosphere in the feeding chamber in a manner that vacuum pumping is performed through a vacuum pump to reach a preset vacuum degree, stopping vacuum pumping and introducing protective gas to enable the air pressure in the smelting chamber to be the same as that in the feeding chamber, opening the discharge port, feeding the metal raw materials to be smelted to the feeding system;
s3, conveying the metal raw material to be smelted into the crucible by a feeding system according to the smelting time sequence of the crucible, wherein in the embodiment, the feeding device is of a flat plate structure, a feeding groove for guiding the metal raw material to slide to the crucible is arranged on the flat plate structure, the feeding groove is U-shaped, the feeding chamber is arranged on one side above the crucible, when the metal needs to be fed, the control system controls the driving assembly to rotate, the driving assembly is a motor and is arranged on the outer wall of the smelting chamber, a motor shaft of the driving assembly extends into the smelting chamber and is fixedly connected with one end of the feeding device of the flat plate structure, so that the feeding device slowly deflects around the motor shaft, the deflection angle is 0-45 degrees, the other end of the feeding device inclines towards the crucible (shown by a dotted line in figure 1), the metal raw material to be smelted slides towards the crucible from the feeding groove of the feeding device under the action of gravity, so that the metal raw material completely slides into the crucible and then returns to the initial horizontal state, thereby achieving the purpose of feeding.
It should be further explained that the feeding mode can be suitable for smelting scenes of continuous feeding and multi-stage feeding, especially for multi-stage feeding, the feeding time sequence is strictly limited, and the device and the method can be suitable for scenes with short feeding time of adjacent stages and have high reliability.
Example 2
The present embodiment is different from embodiment 1 in that:
the feeding device is of a circular tube structure and convenient to process and manufacture, a material receiving port is arranged on the feeding device below the discharge port and used for receiving metal raw materials fed by the discharge port, the pipeline design has the advantages that the metal raw materials can enter the crucible according to a pipeline path, and the atmosphere in the smelting chamber is in a vacuum state.
The rest is the same as in example 1.
Example 3
As shown in fig. 2, a continuous feeding device for gas atomization powder preparation comprises a melting chamber, a feeding chamber and an atmosphere protection system, wherein a crucible and a tundish are arranged in the melting chamber, a material pouring mechanism for pouring materials to the tundish is arranged on one side of the crucible, the material pouring mechanism is a rotating shaft fixedly connected with the crucible, the material pouring motor drives the material pouring mechanism to turn materials to the tundish through the material pouring, atomization powder preparation is carried out, the feeding chamber is arranged on the melting chamber, a feeding port and a discharging port are arranged on the feeding chamber, a feeding system is further arranged in the feeding chamber and used for conveying metal raw materials fed from the discharging port into the crucible, and the atmosphere protection system is used for enabling the melting chamber and the feeding chamber to reach a protection gas protection state.
The device comprises a smelting chamber, a feeding chamber, a control system, a discharge port driving piece, a feeding chamber, an atmosphere protection system, a control valve, a feeding chamber and a protection gas bottle, wherein the control system is an air cylinder, the control system is electrically connected with the discharge port driving piece, the feeding system and the atmosphere protection system, the atmosphere protection system comprises a vacuum pump, a protection gas bottle, and a smelting chamber vacuum sensor and a feeding chamber vacuum sensor which are respectively arranged in the smelting chamber and the feeding chamber, the protection gas bottle is provided with the control valve, and.
A continuous feeding method based on a gas atomization powder preparation continuous feeding device comprises the following steps:
s1, batching: placing a required metal raw material in a crucible, and smelting after the atmosphere in a smelting chamber reaches the smelting requirement through an atmosphere protection system, wherein the atmosphere in the smelting chamber is in a nitrogen protection state;
s2, adding materials: closing a discharge port of a feeding chamber, pretreating metal raw materials to be smelted into blocks or spheres, wherein the mass of each metal raw material is not more than 2Kg, adding the metal raw materials to be smelted from the feed port, closing the feed port, opening the discharge port to feed the metal raw materials to be smelted to a feeding system after the atmosphere in the feeding chamber is the same as that in the smelting chamber through an atmosphere protection system, and closing the discharge port, wherein the feeding system comprises a feeding device and a driving assembly, and the feeding device is connected with the driving assembly. The feeding device is of a caterpillar track structure, is horizontally arranged in the smelting chamber and is positioned on one side above the crucible, does not interfere with a temperature acquisition module in the middle of the crucible, and ensures the accuracy of the temperature acquisition module for acquiring the temperature in the crucible, the driving assembly is a motor and is arranged on the outer wall of the smelting chamber, a motor shaft extends into the smelting chamber and is fixedly connected with a driving wheel of the caterpillar track structure, the caterpillar track structure can store various metal raw materials which are added into the crucible in different time sequences, the intermittent operation is controlled by a control system to realize sequential feeding, the feeding chamber is arranged on the side wall of the smelting chamber and is positioned above one end of the feeding device, and the feeding convenience of the side;
s3, the feeding system conveys the metal raw materials to be smelted to the crucible according to the smelting time sequence of the crucible, and the metal raw materials are poured into a tundish for atomization and powder making after being smelted to the corresponding temperature.
And (4) after the step S3 is completed, continuously feeding materials into the crucible through the feeding system, heating the crucible until the set temperature is reached, atomizing the powder, repeatedly feeding the materials, heating and pulverizing the powder, and realizing the continuous production of atomized powder.
The feeding action of the gas atomization powder preparation continuous feeding device and the time sequence of vacuumizing of the atmosphere protection system and introducing of protective gas are automatically controlled by the control system, and the feeding time of the corresponding metal raw materials can be manually set and adjusted by the control system.
Claims (10)
1. The utility model provides a material device is thrown in succession in gas atomization powder process, is including smelting chamber, feeding chamber, atmosphere protection system, be equipped with crucible and tundish in the smelting chamber, crucible one side is equipped with the mechanism of falling the material that is used for falling the material to the tundish, feeding chamber locates on the smelting chamber, be equipped with feed inlet and discharge gate on the feeding chamber, its characterized in that still be equipped with feeding system in the smelting chamber, feeding system is used for transporting the metal raw and other materials that the discharge gate was delivered to the crucible in, atmosphere protection system is used for smelting chamber and feeding chamber to reach vacuum or protective gas protect the state.
2. The continuous feeding device for gas atomization powder preparation according to claim 1, characterized in that: the feeding system comprises a feeding device and a driving assembly, and the feeding device is connected with the driving assembly.
3. The continuous feeding device for gas atomization powder preparation according to claim 2, wherein the feeding device is any one of a caterpillar structure, a circular tube structure and a flat plate structure.
4. The continuous feeding device for gas atomization and powder preparation as claimed in claim 3, wherein the feeding chamber is disposed on the upper side of the crucible or on the side wall of the melting chamber.
5. The continuous feeding device for gas atomization powder preparation according to claim 4, characterized by further comprising a control system and a discharge port driving member, wherein the control system is electrically connected with the discharge port driving member, the feeding system and the atmosphere protection system.
6. The continuous feeding device for gas atomization powder preparation as claimed in claim 5, wherein the atmosphere protection system comprises a vacuum pump, a protective gas bottle, and a melting chamber vacuum sensor and a feeding chamber vacuum sensor respectively disposed in the melting chamber and the feeding chamber, the protective gas bottle is provided with a control valve, and the vacuum pump and the protective gas bottle are communicated with the feeding chamber.
7. A continuous feeding method based on a gas atomization powder preparation continuous feeding device is characterized by comprising the following steps:
s1, batching: placing the required metal raw material in a crucible, and smelting after the atmosphere in a smelting chamber meets the smelting requirement through an atmosphere protection system;
s2, adding materials: closing a discharge port of the feeding chamber, adding a metal raw material to be smelted from the feed port, closing the feed port, opening the discharge port to deliver the metal raw material to be smelted to the feeding system after the atmosphere in the feeding chamber is the same as that in the smelting chamber through an atmosphere protection system, and closing the discharge port;
and S3, conveying the metal raw material to be smelted into the crucible by the feeding system according to the smelting time sequence of the crucible.
8. The continuous feeding method for gas atomization powder production according to claim 7, wherein in step S2, the metal raw material to be melted is pretreated into a lump or a ball shape.
9. The continuous feeding method for gas atomization powder production according to claim 8, characterized in that the metal raw material to be melted is pretreated into a lump or a pellet having a single mass of not more than 3 Kg.
10. The continuous feeding method for gas atomization powder production according to claim 9, wherein the atmosphere in the melting chamber is in any one of a vacuum state, a nitrogen-protected state and an argon-protected state.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113414397A (en) * | 2021-05-25 | 2021-09-21 | 鞍钢股份有限公司 | Vacuum gas atomization continuous preparation method of iron-based metal powder |
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| CN113414397B (en) * | 2021-05-25 | 2023-01-17 | 鞍钢股份有限公司 | Vacuum gas atomization continuous preparation method of iron-based metal powder |
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Application publication date: 20201229 |