CN202684094U - Device for preparing metal powder - Google Patents
Device for preparing metal powder Download PDFInfo
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- CN202684094U CN202684094U CN201220300027.9U CN201220300027U CN202684094U CN 202684094 U CN202684094 U CN 202684094U CN 201220300027 U CN201220300027 U CN 201220300027U CN 202684094 U CN202684094 U CN 202684094U
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Abstract
The utility model relates to a device for preparing metal powder. The device comprises an atomizing furnace, a heater, a cooler, an atomizing chamber, an atomizer, a pneumatic classifier, an intermediate bin, a screening hopper, a screening machine, a dust remover, a balance tank, a tubular heat exchanger, a vacuum production device, a control system, a perfusion tube, a duct, a pipeline, a gas pipeline, a pneumatic butterfly valve, a solenoid valve and the like. During usage, links such as atmosphere preparation, metal smelting, transfusion, centrifugal atomization, pneumatic classification, mechanical screening, gas purification and cooling are contained, metal is poured onto the atomizer to be subjected to centrifugal atomization to form powder after being smelted and processed, the powder is classified by the pneumatic classifier, the classified coarse powder is subjected to mechanical screening to obtain finished powder, the fine powder is sent into the dust remover by a gas stream for dust removal and purification, the purified gas is accelerated by driving of a high-pressure centrifugal blower, and the gas participates in atomization and classification again after being subjected to heat exchange in the tubular heat exchanger. The device can produce spherical powder bodies below -320 meshes continuously, and the oxygen content is no more than 80ppm.
Description
Technical field
The utility model relates to a kind of apparatus for preparing metal powder, and metal molten, powder atomization, the integrated technology of powder classification process are applied to the powder preparation of powder industry, belongs to the metal powder preparation technical field.
Background technology
The performance function powder body material is to utilize the intrinsic Physical and chemical characteristics of material itself and the direct a kind of powder body material that uses, it has the excellent physical characteristics such as good fluidity, specific area are large, homogeneous chemical composition, and excellent chemical property, but the serviceability of Effective Raise material, reduce production costs, thereby technology of preparing is had very high requirement.Special in the situation of global resources, energy growing tension, all kinds of new high-tech products are to lightweight, miniaturization and multifunctional all future development, the demand of performance function powder body material is increased rapidly, be widely used in fields such as electronic information, machine-building, automobile making, bio-medical, national defense and military.The principal character of high-performance nonferrous metal powder is tiny, spherical, hypoxemia, narrow granularity etc., need to adopt advanced atomization technique to obtain, but, domestic powder by atomization technical merit is larger with external gap, a lot of external major companies arrange technology barriers, improve added value of product with this, obtain high monopoly profit.Cause a large amount of high-performance metal powder and goods to need import, seriously restricted the development of the new and high technology industries such as automobile, electronics, aerospace field.Therefore, the processing technology of preparing level of development high-performance nonferrous metal powder, raising nonferrous metal powder has important practical significance.
The technology of preparing of performance function powder body material derives from the conventional powder manufacturing technology, but conventional art, such as gas atomization, water atomization, atomizing etc., there is short, the problem such as powder quality is high not of continuous production time in these technology, can not satisfy the requirement of performance function powder body material.
Be accompanied by the development of new and high technology, the physical characteristics such as good fluidity, the specific area of utilizing metal dust self to have is large, homogeneous chemical composition make metal dust develop into a kind of function or structure-function integration material.And thisly bring revolutionary variation aspect performance, the cost but also satisfy the needs of numerous high-technology fields development not only can for final products in the modal variation of materials'use.For example, the miniaturization of electronic apparatus, communication product and multifunction impel the encapsulation of integrated circuit and interconnection to develop into surface mounting technology from traditional welding, and the Powdered welding material of high grade becomes the material of surface mounting technology most critical.Therefore, metal dust is being widely applied to all departments such as electronic information, electromechanics, automobile, metallurgy, space flight, aviation, communications and transportation, biomedicine as a kind of high-performance new material.
At present, developed in the world a series of powder by atomization technology, to adapt to the needs of different materials powder by atomization.US Patent No. 4207040 has proposed to prepare the method for powder, but belongs to the powder preparation technology of discontinuous, but not integrated technique is difficult to long-time continuous and prepares powder, is unfavorable for simultaneously guaranteeing the quality of powder; There are same problem in Chinese patent 200410079654.4, Chinese patent 200410021160.0, and are unfavorable for obtaining preferably powder morphology, are difficult to simultaneously to guarantee the control to superfine powder content; The method that US483892 provides a kind of atomization gas to recycle with pressurized liquefied after the gas purification after the atomizing, changes into gases at high pressure again and comes into operation, and its deficiency is that processing cost is higher, is unfavorable for reducing product price and improves product competitiveness.By developing advanced atomization technique with many core technologies and supporting technology are integrated, and atomizing is equipped in constantly to maximization, integrated future development, further to reduce production costs, enhance productivity, to increase the competitiveness of product, be a trend of powder-making technique development.
The utility model content
The purpose of this utility model is, for the deficiency of prior art, complies with the development trend of powder technology, proposes a kind of efficient, energy-saving and environmental protection, is suitable for preparing the preparation facilities of high-quality metal dust.
For achieving the above object, the utility model is taked following technical scheme:
A kind of apparatus for preparing metal powder, this device comprises smelting apparatus, heater, cooler, spray chamber, atomizer, pneumatic classification device, intermediate bin, screening funnel, screen(ing) machine, deduster, compensator, tubular heat exchanger, pumping equipment, control system, woven hose, conduit, pipeline, gas pipeline, Pneumatic butterfly valve and magnetic valve etc., atomizing indoor location atomizer, smelting apparatus links to each other with conduit on being installed on atomizer by woven hose, heater and cooler are housed on the woven hose, are used for feed flow or stop feed flow; Spray chamber links to each other with the pneumatic classification device by pipeline, and the clasfficiator inclined tube of pneumatic classification device joins by Pneumatic butterfly valve and intermediate bin, and intermediate bin docks with the screening funnel by Pneumatic butterfly valve, and the screening funnel links to each other with screen(ing) machine; The pneumatic classification device is connected with deduster by gas pipeline, deduster is connected with compensator by gas pipeline, centrifugal high pressure fan is housed in the compensator, compensator is connected with tubular heat exchanger by gas pipeline, the tubular heat exchanger gas outlet connects return air duct, is divided into two return air branch roads again, and one the tunnel gets back to the spray chamber top, the secondary returning air port of pneumatic classification device is got back on another road, is connected to pumping equipment at return air duct.
Said apparatus has formed the powder production device, comprises the links such as atmosphere preparation, Metal Melting, transfusion, atomizing, floating powder sedimentation, pneumatic classification, mechanical grading, gas purification and cooling.
Described smelting apparatus is smelting furnace and/or atomizing furnace, and smelting furnace can link to each other with atomizing furnace by woven hose.
Described atomizer is a kind of in centrifugal atomizer, ultrasonic atomizer and the gas atomizer.
Described spray chamber, tubular heat exchanger etc. are all installed cooling device, and the type of cooling is generally water-cooled or air cooling, preferred water-cooled.
Described pneumatic classification device is the mouse cage type centrifugal clasfficiator, and the mouse cage rotating speed is in 200 ~ 3000rpm scope.Described screen(ing) machine is mechanical picker.
Described deduster is the pneumatic principle pattern, and typical structure is cyclone dust collectors, or is the work principle of filter pattern, and typical structure is sack cleaner and candle filter.
Described deduster is preferably the combination of two or more dedusters, comprising in pneumatic principle pattern deduster and the work principle of filter pattern deduster one or more, is connected in series by gas pipeline.Two or more dedusters are connected in series by gas pipeline, wherein preferably include at least one pneumatic principle pattern deduster and at least one work principle of filter pattern deduster.
When utilizing device of the present utility model to prepare metal dust, comprise the processing steps such as atmosphere preparation, metal molten, melt Conveying, atomizing, floating powder sedimentation, pneumatic classification, mechanical grading, gas purification, gas-powered, gas cooled; Spray chamber is vacuumized, inflates, carry out atmosphere and prepare; After melting, metal (comprising elemental metals and alloy) forms metal bath in smelting apparatus, metal bath waters on the atomizer in the spray chamber by woven hose, conduit, atomize by atomizer, form vaporific, vaporific molten drop flies, cools off, solidifies the formation powder in spray chamber, powder is sent to the classification of pneumatic classification device; Meal behind the pneumatic classification enters in the screening funnel by intermediate bin, carries out mechanical grading by screen(ing) machine, obtains finished powder; Fine powder behind the pneumatic classification is sent into udst separation in the deduster by air-flow, and purified gas enters in the compensator, drives through centrifugal high pressure fan to obtain to accelerate, and by being divided into two-way after the tubular heat exchanger heat exchange, the one tunnel gets back to spray chamber, and one the tunnel enters the pneumatic classification device.
Atmosphere preparation in the metal powder preparation, metal molten, melt Conveying, powder atomization, floating powder sedimentation, powder classification, gas cooled, purification and cyclic process is integrated, metal powder preparation process (pulverizing process) is carried out in closed environment, gas circulation in the system is used, and the powder of formation produces from closed system in the screening funnel by intermediate bin.The utility model makes the continuity of metal powder preparation process reach maximization.
Described metal is element or its alloys such as Sn, Pb, Bi, Sb, Ag, Cu, In, Zn, Al, Si, Ga, Ge, B, C, P, Ni, Ti, Cr, Mn, rare earth.Described smelting apparatus is smelting furnace and/or atomizing furnace, and smelting furnace can link to each other with atomizing furnace by woven hose.
Described metal bath also need pass through heater and cooler before entering atomizer, be used for metal bath heating or cooling, with the feed flow of control metal bath or stop feed flow.
When atmosphere was prepared, the gas that described inflation is adopted was one or more in nitrogen, argon gas, helium, hydrogen, ammonia, air and the oxygen.
During atomizing, the system environments atmosphere pressures in the described spray chamber is 0 ~ 50KPa.
During atomizing, the oxygen content of range of atomization is generally in 10 ~ 1000ppm scope in the described spray chamber.
During atomizing, the metal bath atomization temperature is higher than 20 ~ 180 ° of C of melting point metal.
Described powder is sent to the pneumatic classification device by gravity and pneumatic conveying (under the effect of air-flow).
Described pneumatic classification device can be the mouse cage type centrifugal clasfficiator, and the mouse cage rotating speed is usually in 200 ~ 3000rpm scope.
By being divided into two-way after the tubular heat exchanger heat exchange, the one tunnel gets back to the top of spray chamber, and the floating powder of range of atomization is taken away, and one the tunnel enters the secondary returning air port of pneumatic classification device.
Control system of the present utility model is controlled by PLC, accurately supplies with pneumatic process control melt, improves the stability of powder size control; By atomization tank return air floating superfine powder is in time taken away, reduced the range of atomization dust concentration, thereby be conducive to increase the spherical powder ratio, and be conducive to powder formation fine texture; The utility model is removed superfine powder by pneumatic classification, then carries out mechanical grading, has guaranteed screening precision, has reduced oxygen content in power; In the utility model; atmosphere is prepared; metal molten; melt Conveying; atomizing; floating powder sedimentation; pneumatic classification; mechanical grading; gas purification; gas-powered; the techniques such as gas cooled are carried out scientific and effective integrated; each process procedure is effectively docked; the realization powder production is integrated; shortened technological process; reduced middle swivel link; improved automation degree of equipment; production efficiency and powder quality have been improved; powder production can be carried out continuously; and because powder preparation is to carry out in closed environment; gas circulation is used; therefore reduce to greatest extent environmental pollution, greatly improved production environment and reduced to greatest extent discharging, realized the environmental protection of powder production.
Device of the present utility model can be used for element and the alloys thereof such as atomizing Sn, Pb, Bi, Sb, Ag, Cu, In, Zn, Al, Si, Ga, Ge, B, C, P, Ni, Ti, Cr, Mn, rare earth, can produce continuously the following spherical powder of-320 orders, oxygen content≤80ppm.
Below by the drawings and specific embodiments the utility model is described further, but and does not mean that restriction to the utility model protection domain.
Description of drawings
Fig. 1 is the apparatus for preparing metal powder structural representation.
Fig. 2 is SnAg
3Cu
0.5Powder (25 ~ 38 microns) stereoscan photograph.
Fig. 3 is SnAg
3Cu
0.5Powder (25 ~ 38 microns) Laser particle-size distribution.
Fig. 4 is SnBi58 powder (25 ~ 62 microns) stereoscan photograph.
Fig. 5 is SnBi58 powder (25 ~ 62 microns) Laser particle-size distribution.
Main description of reference numerals:
Smelting furnace 1 woven hose 2,4
Atomizing furnace 3 conduits 5
Atomizer 6,7 spray chambers 8
Control system 9 pipelines 10
Pneumatic classification device 15 return air ducts 16
Screening funnel 24 mechanical pickers 25
Receive powder tank 26 and receive powder tank 28
Tubular heat exchanger 35 pumping equipments 37
The specific embodiment
As shown in Figure 1, be the utility model apparatus for preparing metal powder structural representation.Apparatus for preparing metal powder of the present utility model comprises smelting furnace 1, atomizing furnace 3, woven hose 2,4 and conduit 5, heater 38, cooler 39, spray chamber 8, atomizer 6,7, pneumatic classification device 15, intermediate bin 21, screening funnel 24, mechanical picker 25, deduster 27,30, compensator 33, tubular heat exchanger 35, pumping equipment 37, control system 9, pipeline 10, gas pipeline 17,29,31,34, Pneumatic butterfly valve 11,14,19,22,32,36 and magnetic valve 20, the apparatus such as 23.
The devices such as spray chamber 8, tubular heat exchanger 35 all are equipped with cooling device, and the type of cooling is selected water-cooled and air cooling usually, is preferably water-cooled.Deduster 27,30 can be the pneumatic principle pattern, and typical structure is cyclone dust collectors; Deduster 27,30 can be the work principle of filter pattern, and typical structure is sack cleaner and candle filter; Deduster 27,30 is preferably the combination of pneumatic principle pattern and work principle of filter pattern.But smelting furnace 1 is arrangement, also can only join atomizing furnace 3.System is furnished with pumping equipment 37, is common apparatus, makes system possess the vacuum capacitation.Said apparatus links to each other successively by Fig. 1 and has consisted of closed system, and screening funnel 24, mechanical picker 25 are the device that links to each other with atmospheric environment, and they are connected with closed system by intermediate bin 21.
Smelting apparatus can adopt resistance-heated furnace, also can adopt induction heater, and generally metallic character and the product requirement by institute's melting determines whether be vacuum drying oven.For high-end product, generally select vacuum melting, smelting apparatus can be selected 1, namely only joins atomizing furnace 3, in order to realize long-time continuous production, is preferably 2, namely is provided with simultaneously atomizing furnace 3 and smelting furnace 1.Smelting furnace 1 links to each other with atomizing furnace 3 by woven hose 2, atomizing furnace 3 links to each other with the conduit 5 of spray chamber 8 by woven hose 4,4 are equipped with heater 38 and cooler 39 on the woven hose, by heater 38 woven hose 4 is heated to above 30 ~ 200 ℃ of alloy melting points during feed flow, if want stopping infusion, by cooler 39 woven hose 4 is cooled to be lower than 20 ~ 150 ℃ of alloy melting points and can makes melt solidifying in woven hose 4, so play sealing process.
Said apparatus has formed the powder production device, comprises atmosphere preparation, Metal Melting, transfusion, atomizing, floating powder sedimentation, pneumatic classification, mechanical grading, gas purification and the links such as driving and cooling.
When utilizing device of the present utility model to prepare metal dust, comprise the links such as atmosphere preparation, Metal Melting, melt Conveying, atomizing, floating powder sedimentation, pneumatic classification, mechanical grading, gas purification, gas-powered, gas cooled.Want completion system atmosphere to prepare and Metal Melting before entering atomizing, at first spray chamber is vacuumized, inflates, carry out atmosphere and prepare; Metal is communicated with atomizing furnace 3 by woven hose 2 in smelting furnace 1 fusing and after processing, by woven hose 4, conduit 5 metal bath is watered on the atomizer 6 again, 6 effects form vaporific through atomizer, vaporific molten drop flies, cools off, solidifies the formation powder in spray chamber 8, powder is sent to 15 classifications of pneumatic classification device under the effect of gravity and air-flow, meal behind pneumatic classification produces closed system by intermediate bin 21 and enters gadgetize sieve 25 screenings in the screening funnel 24, and mechanical grading obtains finished powder to receiving powder tank 26; Fine powder behind the pneumatic classification is sent into udst separation in the deduster 27,30 by air-flow, isolation of purified dust out is collected into receives powder tank 28, purified gas enters in the compensator 33, driving acquisition through centrifugal high pressure fan accelerates, by being divided into two-way after the tubular heat exchanger 35 further heat exchange, one the tunnel gets back to spray chamber 8, and one the tunnel enters pneumatic classification device 15, again participates in atomizing and classification.
Before atomizing, to carry out atmosphere and prepare, namely by pumping equipment 37 whole system be vacuumized.Vacuum is decided by the characteristic of metal (or alloy) and the characteristic of powder, distribute and the aspect such as oxygen content in power has determined that atmosphere prepares the height of the vacuum that will reach such as the active degree of metal (or alloy), powder size, generally be not higher than 2000Pa.After reaching requirement, vacuum is filled with the gas that needs, general one or more that adopt in nitrogen, argon gas, helium, hydrogen, ammonia, air, the oxygen, usually adopt take nitrogen as main, simultaneously adding is no more than other gases of 10%, specifically adopts which kind of gas to need decide according to alloy characteristic and powder requirement.System's internal pressure generally is charged to 0 ~ 50KPa in the atomization process, and this is the needs of melt atomization process on the one hand, and the opposing party also can avoid system's oxygenation.By setting automatically control, it is end effector that automatic deflation and aerating device are arranged by control system 9 in the maintenance of system pressure.Adopt already known processes that metal is pressed design mix proportioning melting and purification in smelting furnace, then utilize known transfusion technique to make melt supply to atomizing furnace 3 by smelting furnace 1 through woven hose 2, flowed in the conduit 5 in the spray chambers 8 by atomizing furnace 3 by woven hose 4 again, and continue to flow downward to supply on the atomizer 6 and atomize.Atomizer 6 is a kind of in centrifugal atomizer, ultrasonic atomizer and the gas atomizer.
But furnace molten 1 is arrangement in the utility model, therefore not necessarily.Melt Conveying adopts known technology to carry out, and can utilize gravity to order about melt flows, also can adopt the air pressure mode to drive, and its control technology is that the insider is in common knowledge.1 atomizer 6 is installed in the spray chamber 8, and the melt on surface accelerates, disperses with watering thereon, forms vaporific molten drop, and vaporific molten drop flies, cools off, is frozen into powder in spray chamber 8.The temperature field of range of atomization will produce material impact to atomizing, highlyer or low all can affect powder morphology and size distribution, therefore will and keep desirable temperature field by the control acquisition.The control in temperature field, the utility model range of atomization is that the control by aspects such as spray chamber 8 coolings, tank deck return air temperature, melt temperature and flows realizes.The cooling of spray chamber 8 is controlled, temperature monitoring by the range of atomization is regulated intensity of cooling, regulates as a same reason tubular heat exchanger 35 intensities of cooling, makes gas obtain suitable cooling, control tubular heat exchanger 35 leaving air temps, thus help obtains the ideal temperature field of range of atomization; Melt temperature and flow also are significantly on the impact in temperature field, range of atomization, but its adjustable extent is less, can play booster action to the control in temperature field, range of atomization.Oxygen content can produce extremely important impact to pattern and the size distribution of powder, lower oxygen content can make the metal droplet lack enough nodularization driving forces, cause powder to become polyhedron-shaped or inter-adhesive formation adhesion powder even formation snowflake powder, and higher range of atomization oxygen content can cause metal droplet surface to form more oxide, affected on the contrary the nodularization of droplet, cause special-shaped powder to increase, only have when the oxygen content of range of atomization maintains OK range, the existence of oxygen just can become the desirable driving force of molten drop nodularization, and it is better to be conducive to form sphericity, the powder that the surface is comparatively smooth.The oxygen content of range of atomization needs to determine according to factors such as metallic character and powder size and oxygen content requirements generally in 10 ~ 1000ppm scope.In order to keep the stable of atomization process oxygen content, control system 9 has oxygen analyzer and automatic oxygen supplementing device.Powder falls under the effect of gravity and tank deck return air, and the place compiles at the spray chamber meal outlet, is transported to by pipeline under airflow function and carries out classification in the pneumatic classification device 15.Always have certain density floating powder in the range of atomization, the existence of floating powder causes adhesion powder quantity to increase, therefore need to reduce as far as possible the concentration of the floating powder in range of atomization, the utility model is taken away floating powder by force by introduce return air at the spray chamber top for this reason, thereby reach the purpose of improving powder morphology, and the microstructure of refinement powder.Pneumatic classification device 15 is selected mouse cage type centrifugal clasfficiator (centrifugal mouse cage clasfficiator) usually, and the mouse cage rotating speed in 200 ~ 3000rpm scope, is preferably 500 ~ 1500rpm usually, and concrete technology will distribute to optimize according to powder metallurgy character and powder size.Meal behind pneumatic classification produces closed system by intermediate bin 21 and enters that screening funnel 24 is medium treats the machinery screening, and mechanical grading obtains finished powder.The general commercially available spin vibration sieves that adopt of mechanical grading, it is furnished with ultrasonic vibration to strengthen screening effect more.The import of intermediate bin 21 and outlet all have Pneumatic butterfly valve 19,22, intermediate bin 21 also to be furnished with air inlet and pressure-releasing electromagnetic valve 20, by control system 9 control, and two butterfly valves 19,22 in turn opening and closing, and cooperate air pressure and atmosphere adjusting just can realize producing of powder.Superfine powder behind the pneumatic classification is sent into udst separation in the deduster 27,30 by air-flow, by deduster 27,30 effects the dust in the gas is removed, make gas become pure, purified gas enters in the compensator 33, obtain to boost acceleration through the centrifugal high pressure fan driving, by being divided into two-way after the tubular heat exchanger 35 further heat exchange, the one tunnel gets back to the top of spray chamber 8, one the tunnel enters the secondary returning air port of pneumatic classification device 15, again participates in atomizing and classification.The distribution of this tow channel gas is by butterfly valve 11,14 controls, to adjust its flow.So consisted of the gas circulation airtight passage, can realize atmosphere preparation, powder atomization, pneumatic classification, gas purification, cooling and circulation, powder produces finished powder by the screen(ing) machine screening after producing the circulatory system, and whole process can be carried out continuously.
The metal that the utility model adopts is element or its alloys such as Sn, Pb, Bi, Sb, Ag, Cu, In, Zn, Al, Si, Ga, Ge, B, C, P, Ni, Ti, Cr, Mn, rare earth.Metal bath also can pass through heater and cooler before entering atomizer, be used for metal bath heating or cooling, with the feed flow of control metal bath or stop feed flow.During atomizing, the metal bath atomization temperature is higher than 20 ~ 180 ° of C of melting point metal.
The utility model is integrated with the atmosphere preparation in the metal powder preparation, metal molten, melt Conveying, powder atomization, floating powder sedimentation, powder classification, gas cooled, purification and cyclic process, metal powder preparation process (pulverizing process) is carried out in closed environment, gas circulation in the system is used, and the powder of formation produces from closed system in the screening funnel by intermediate bin.The utility model makes the continuity of metal powder preparation process reach maximization.
Embodiment 1
Atomizing SnAg
3Cu
0.5System is evacuated to 50Pa, is filled with nitrogen and 100ppm oxygen and prepares to atomize to 40KPa.Sn, Ag, Cu are added in the vacuum melting furnace 1 by the design proportioning, in the time of 330 ℃, carry out melting after vacuumizing inflation, after the purified treatment melt is squeezed in the atomizing furnace 3, then supply with rotating disk by infusion channel, motor atomizes with the rotating speed driving turntable rotation of 50000rpm, and spray chamber 8 oxygen contents are stabilized in 100ppm.Powder enters under gravity and airflow function through the centrifugal classifier classification, centrifugal classifier mouse cage rotating speed 750rpm.The isolated meal of centrifugal classifier is produced to screening funnel 24 by closed system by the transfer of intermediate bin 21, and screening obtains finished powder (the powder morphology photo is seen Fig. 2, and size distribution is seen Fig. 3) through spin vibration sieve afterwards.Superfine powder enters deduster 27,30 with air-flow, deduster 27,30 is cyclone separator 27 and sack cleaner 30 combinations, superfine powder is most of being settled down in cyclone separator 27, have to enter on a small quantity in the sack cleaner 30 and be filtered collection, after being cleaned, passes through gas tubular heat exchanger 35 heat exchange, then be divided into two-way, the one tunnel gets back to spray chamber 8 tops participates in atomizing, and one the tunnel gets back in the centrifugal classifier 15 and participates in classification.Spray chamber 8 and tubular heat exchanger 35 are by water cooling, and spray chamber 8 and centrifugal classifier allocation of the amount of air are by butterfly valve control 11 and 14.
Embodiment 2
Atomizing SnBi58.System is evacuated to 50Pa, is filled with nitrogen and 80ppm oxygen and prepares to atomize to 30KPa.Sn, Bi are added in the vacuum melting furnace 1 by the design proportioning, in the time of 200 ℃, carry out melting after vacuumizing inflation, after the purified treatment melt is squeezed in the atomizing furnace 3, then supply with atomizer by infusion channel, atomizer adopts ultrasonic atomizer, its vibration frequency is 60KHz, and melt is atomized, and spray chamber 8 oxygen contents are stabilized in 80ppm.Powder carries out classification, centrifugal classifier mouse cage rotating speed 500rpm entering under gravity and the airflow function in centrifugal classifier 15.The isolated meal of centrifugal classifier is produced to screening funnel 24 by closed system by the transfer of intermediate bin 21, and 25 screenings obtain finished powder (the powder morphology photo is seen Fig. 4, and size distribution is seen Fig. 5) through spin vibration sieve afterwards.Superfine powder enters deduster 27,30 with air-flow, and deduster 27,30 is cyclone dust collectors 27 and candle filter 30 combinations.Superfine powder is most of being settled down in cyclone dust collectors 27, have to enter on a small quantity in the candle filter 30 and be filtered collection, after being cleaned, passes through gas tubular heat exchanger 35 heat exchange, then be divided into two-way, one the tunnel gets back to spray chamber 8 tops participates in atomizing, and one the tunnel gets back in the centrifugal classifier 15 and participates in classification.Spray chamber 8 and tubular heat exchanger 35 are by water cooling, and spray chamber 8 and centrifugal classifier 15 allocation of the amount of airs are by butterfly valve 11 and 14 controls.
Embodiment 3
Atomizing SnAg
0.3Cu
0.7System is evacuated to 80Pa, is filled with nitrogen and 60ppm oxygen and 1% hydrogen and prepares to atomize to 50KPa.Sn, Ag, Cu are added in the vacuum melting furnace 1 by the design proportioning, in the time of 310 ℃, carry out melting after vacuumizing inflation, after the purified treatment melt is squeezed in the atomizing furnace 3, then by infusion channel supply gas atomizer, atomizer atomizes with 2Mpa pressure, and spray chamber 8 oxygen contents are stabilized in 60ppm.Powder enters under gravity and airflow function through the centrifugal classifier classification, centrifugal classifier mouse cage rotating speed 550rpm.The isolated meal of centrifugal classifier is produced to screening funnel 24 by closed system by the transfer of intermediate bin 21, and screening obtains finished powder (powder size is less than 45 microns, and 20 ~ 36 microns powder proportions reach 60%, oxygen content 60ppm) through spin vibration sieve afterwards.Superfine powder enters deduster 27,30 with air-flow, deduster 27,30 is cyclone separator 27 and sack cleaner 30 combinations, superfine powder is most of being settled down in cyclone separator 27, have to enter on a small quantity in the sack cleaner 30 and be filtered collection, after being cleaned, passes through gas tubular heat exchanger 35 heat exchange, then be divided into two-way, the one tunnel gets back to spray chamber 8 tops participates in atomizing, and one the tunnel gets back in the centrifugal classifier 15 and participates in classification.Spray chamber 8 and tubular heat exchanger 35 are by water cooling, and spray chamber 8 and centrifugal classifier allocation of the amount of air are by butterfly valve control 11 and 14.
Atomizing SnAg
1.0Cu
0.5System is evacuated to 100Pa, is filled with nitrogen and 200ppm oxygen and prepares to atomize to 20KPa.Sn, Ag, Cu are added in the vacuum melting furnace 1 by the design proportioning, in the time of 300 ℃, carry out melting after vacuumizing inflation, after the purified treatment melt is squeezed in the atomizing furnace 3, then supply with rotating disk by infusion channel, motor atomizes with the rotating speed driving turntable rotation of 60000rpm, and spray chamber 8 oxygen contents are stabilized in 200ppm.Powder enters under gravity and airflow function through the centrifugal classifier classification, centrifugal classifier mouse cage rotating speed 950rpm.The isolated meal of centrifugal classifier is produced to screening funnel 24 by closed system by the transfer of intermediate bin 21, and screening obtains finished powder (powder size is less than 45 microns, and 20 ~ 36 microns powder proportions reach 65%, oxygen content 70ppm) through spin vibration sieve afterwards.Superfine powder enters deduster 27,30 with air-flow, deduster 27,30 is cyclone separator 27 and sack cleaner 30 combinations, superfine powder is most of being settled down in cyclone separator 27, have to enter on a small quantity in the sack cleaner 30 and be filtered collection, after being cleaned, passes through gas tubular heat exchanger 35 heat exchange, then be divided into two-way, the one tunnel gets back to spray chamber 8 tops participates in atomizing, and one the tunnel gets back in the centrifugal classifier 15 and participates in classification.Spray chamber 8 and tubular heat exchanger 35 are by water cooling, and spray chamber 8 and centrifugal classifier allocation of the amount of air are by butterfly valve control 11 and 14.
Atomizing SnBi
30Cu
0.5System is evacuated to 120Pa, is filled with nitrogen and 300ppm oxygen and prepares to atomize to 25KPa.Sn, Bi, Cu are added in the vacuum melting furnace 1 by the design proportioning, in the time of 236 ℃, carry out melting after vacuumizing inflation, after the purified treatment melt is squeezed in the atomizing furnace 3, then supply with atomizer-rotating disk by infusion channel, motor atomizes with the rotating speed driving turntable rotation of 50000rpm, melt is atomized, and spray chamber 8 oxygen contents are stabilized in 300ppm.Powder carries out classification, centrifugal classifier mouse cage rotating speed 450rpm entering under gravity and the airflow function in centrifugal classifier 15.The isolated meal of centrifugal classifier is produced to screening funnel 24 by closed system by the transfer of intermediate bin 21, and 25 screenings obtain finished powder (20 ~ 45 microns powder proportions reach 95%, oxygen content 35ppm) through spin vibration sieve afterwards.Superfine powder enters deduster 27 with air-flow, and deduster 27 is cyclone dust collectors.Superfine powder is settled down in cyclone dust collectors 27, by tubular heat exchanger 35 heat exchange, then is divided into two-way after gas is cleaned, and one the tunnel gets back to spray chamber 8 tops participates in atomizing, and one the tunnel gets back in the centrifugal classifier 15 and participates in classification.Spray chamber 8 and tubular heat exchanger 35 are by water cooling, and spray chamber 8 and centrifugal classifier 15 allocation of the amount of airs are by butterfly valve 11 and 14 controls.
Device of the present utility model can be used for atomizing element and the alloys thereof such as Sn, Pb, Bi, Sb, Ag, Cu, In, Zn, Al, Si, Ga, Ge, B, C, P, Ni, Ti, Cr, Mn, rare earth, can produce continuously the following spherical powder of-320 orders, oxygen content≤80ppm.
Claims (10)
1. apparatus for preparing metal powder, it is characterized in that: comprise smelting apparatus, heater, cooler, spray chamber, atomizer, the pneumatic classification device, intermediate bin, the screening funnel, screen(ing) machine, deduster, compensator, tubular heat exchanger, pumping equipment, control system, woven hose, conduit, pipeline, gas pipeline, Pneumatic butterfly valve and magnetic valve, atomizing indoor location atomizer, smelting apparatus links to each other with conduit on being installed on atomizer by woven hose, heater and cooler are housed on the woven hose, spray chamber links to each other with the pneumatic classification device by pipeline, the clasfficiator inclined tube of pneumatic classification device joins by Pneumatic butterfly valve and intermediate bin, intermediate bin docks with the screening funnel by Pneumatic butterfly valve, and the screening funnel links to each other with screen(ing) machine; The pneumatic classification device is connected with deduster by gas pipeline, deduster is connected with compensator by gas pipeline, centrifugal high pressure fan is housed in the compensator, compensator is connected with tubular heat exchanger by gas pipeline, the tubular heat exchanger gas outlet connects return air duct, is divided into two return air branch roads again, and one the tunnel gets back to the spray chamber top, the secondary returning air port of pneumatic classification device is got back on another road, is connected to pumping equipment at return air duct.
2. apparatus for preparing metal powder according to claim 1, it is characterized in that: described smelting apparatus is smelting furnace or atomizing furnace.
3. apparatus for preparing metal powder according to claim 1, it is characterized in that: described smelting apparatus is smelting furnace and atomizing furnace, described smelting furnace links to each other with described atomizing furnace by woven hose.
4. apparatus for preparing metal powder according to claim 1, it is characterized in that: described atomizer is centrifugal atomizer, ultrasonic atomizer or gas atomizer.
5. apparatus for preparing metal powder according to claim 1, it is characterized in that: described spray chamber, tubular heat exchanger are all installed cooling device, and the type of cooling is water-cooled or air cooling.
6. apparatus for preparing metal powder according to claim 1, it is characterized in that: described pneumatic classification device is the mouse cage type centrifugal clasfficiator, described screen(ing) machine is mechanical picker.
7. apparatus for preparing metal powder according to claim 6, it is characterized in that: the mouse cage rotating speed of described mouse cage type centrifugal clasfficiator is 200 ~ 3000rpm.
8. apparatus for preparing metal powder according to claim 1, it is characterized in that: described deduster is pneumatic principle pattern deduster or work principle of filter pattern deduster.
9. apparatus for preparing metal powder according to claim 8, it is characterized in that: described pneumatic principle pattern deduster is cyclone dust collectors, described work principle of filter pattern deduster is sack cleaner or candle filter.
10. apparatus for preparing metal powder according to claim 9, it is characterized in that: described deduster is two or more combination, comprising in pneumatic principle pattern deduster and the work principle of filter pattern deduster one or more, be connected in series by gas pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220300027.9U CN202684094U (en) | 2012-06-21 | 2012-06-21 | Device for preparing metal powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220300027.9U CN202684094U (en) | 2012-06-21 | 2012-06-21 | Device for preparing metal powder |
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| CN202684094U true CN202684094U (en) | 2013-01-23 |
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| CN201220300027.9U Withdrawn - After Issue CN202684094U (en) | 2012-06-21 | 2012-06-21 | Device for preparing metal powder |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102689015A (en) * | 2012-06-21 | 2012-09-26 | 北京有色金属研究总院 | Metal powder preparation device and method therefor |
| CN103658001A (en) * | 2013-12-31 | 2014-03-26 | 金堆城钼业股份有限公司 | Method and device for preparing narrow-band size distribution molybdenum powder |
| CN103977918A (en) * | 2013-02-08 | 2014-08-13 | 神华集团有限责任公司 | Method and system for separating powder |
| CN105618235A (en) * | 2016-01-20 | 2016-06-01 | 上海景烯新能源材料科技有限公司 | Continuous producing and preparing device for carbon graphite |
| CN107008911A (en) * | 2017-04-26 | 2017-08-04 | 江苏浙宏科技股份有限公司 | A kind of diamond synthesis catalytic powder preparation facilities |
| WO2019024420A1 (en) * | 2017-08-04 | 2019-02-07 | 米亚索乐装备集成（福建）有限公司 | Alloy powder and preparation method therefor |
| CN113547127A (en) * | 2021-07-20 | 2021-10-26 | 成都先进金属材料产业技术研究院股份有限公司 | Device and method for preparing spherical metal powder for 3D printing at low cost |
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2012
- 2012-06-21 CN CN201220300027.9U patent/CN202684094U/en not_active Withdrawn - After Issue
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102689015A (en) * | 2012-06-21 | 2012-09-26 | 北京有色金属研究总院 | Metal powder preparation device and method therefor |
| CN102689015B (en) * | 2012-06-21 | 2014-03-26 | 北京有色金属研究总院 | Metal powder preparation device and method therefor |
| CN103977918A (en) * | 2013-02-08 | 2014-08-13 | 神华集团有限责任公司 | Method and system for separating powder |
| CN103977918B (en) * | 2013-02-08 | 2017-02-08 | 神华集团有限责任公司 | Method and system for separating powder |
| CN103658001A (en) * | 2013-12-31 | 2014-03-26 | 金堆城钼业股份有限公司 | Method and device for preparing narrow-band size distribution molybdenum powder |
| CN103658001B (en) * | 2013-12-31 | 2015-09-09 | 金堆城钼业股份有限公司 | Prepare method and the device of narrow-band size distribution molybdenum powder |
| CN105618235A (en) * | 2016-01-20 | 2016-06-01 | 上海景烯新能源材料科技有限公司 | Continuous producing and preparing device for carbon graphite |
| CN105618235B (en) * | 2016-01-20 | 2019-03-15 | 上海景烯新能源材料科技有限公司 | Carbon graphite continuous production prepares device |
| CN107008911A (en) * | 2017-04-26 | 2017-08-04 | 江苏浙宏科技股份有限公司 | A kind of diamond synthesis catalytic powder preparation facilities |
| CN107008911B (en) * | 2017-04-26 | 2023-08-22 | 江苏兴贤高新材料股份有限公司 | Catalyst powder preparation device for synthetic diamond |
| WO2019024420A1 (en) * | 2017-08-04 | 2019-02-07 | 米亚索乐装备集成（福建）有限公司 | Alloy powder and preparation method therefor |
| CN113547127A (en) * | 2021-07-20 | 2021-10-26 | 成都先进金属材料产业技术研究院股份有限公司 | Device and method for preparing spherical metal powder for 3D printing at low cost |
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