阅读说明：本技术 贵金属合金熔炼造粉水循环一体机 (Precious metal alloy smelting and powder making water circulation integrated machine ) 是由 孙勇升 高明生 袁喜洋 刘建军 张进军 于 2020-12-11 设计创作，主要内容包括：本发明提出一种贵金属合金熔炼造粉水循环一体机,包括造粉罐、收集罐、喷盘、水循环系统,在喷盘的轴线处开设供熔融合金液流出的流道孔,在喷盘内部开设若干水道孔,对接机构包括相对设置的两个卡紧件、找正压盘、找正螺杆、找正弧形板,水循环系统包括排气管、冷凝罐、回流管、冷却池,本发明通过调整水道孔的延伸方向,控制高压水雾喷出方向,改变金属粒被切割后的运动方向,使金属粒形成滚动的运动趋势,成球率高,金属粉料比容易于测量和控制,流动性好,通过水循环系统平衡浇注时造粉罐内的气压,实现安全浇注。(The invention provides a precious metal alloy smelting and powder making water circulation integrated machine, which comprises a powder making tank, a collecting tank, a spray disc and a water circulation system, wherein a runner hole for molten alloy liquid to flow out is formed in the axis of the spray disc, a plurality of water channel holes are formed in the spray disc, a butt joint mechanism comprises two clamping pieces, an alignment pressure disc, an alignment screw rod and an alignment arc-shaped plate which are oppositely arranged, and the water circulation system comprises an exhaust pipe, a condensation tank, a return pipe and a cooling pool.)

1. The utility model provides a noble metal alloy is smelted and is made whitewashed water circulation all-in-one which characterized in that: comprises a powder making tank, a collecting tank, a spray disk and a water circulation system, wherein the powder making tank is a hollow tank body, the spray disk is arranged at an inlet above the powder making tank, the collecting tank is arranged at an outlet below the powder making tank, the spray disk is a disk body, a flow passage hole for molten alloy liquid to flow out is arranged at the axis of the spray disk, the upper port of the flow passage hole is used for receiving the molten alloy liquid, the lower port of the flow passage hole is communicated with the powder making tank, a plurality of water passage holes are arranged in the spray disk, one end of each water passage hole is communicated with the outer wall of the spray disk and is used for being connected with an external high-pressure water spray system, the other end of each water passage hole is communicated with the flow passage hole or the bottom of the spray disk, the plurality of water passage holes are uniformly distributed in the circumferential direction of the spray disk, the water passage holes are obliquely arranged in the spray disk, the extension lines of the oblique directions of the plurality of the water passage holes are arranged in a staggered manner along the height of the axial direction of the spray disk, the collecting tank is open-top's a jar body, the oral area of collecting tank is the same with the below export bore of making the powder jar, still is making the below export installation lower flange of powder jar, installs the flange at the opening part of collecting tank, sets up docking mechanism in the below exit of making the powder jar, docking mechanism is including relative two chucking spare, alignment pressure disk, alignment screw rod, alignment arc that set up, and two chucking spare have the looks isostructure, fixed the setting in the lower flange relative both sides of making the powder jar respectively, and the alignment pressure disk surrounds the collecting tank setting, and connects two chucking spares as an organic whole, sets up the screw that supplies the alignment screw rod to pass on the alignment pressure disk, and the one end and the alignment pressure disk threaded connection of alignment screw rod, the alignment arc are connected to the other end, the alignment arc is used for contacting with the outer wall of collecting tank, water circulating system includes blast pipe, condensing tank, The powder making device comprises a return pipe and a cooling pool, wherein one end of the exhaust pipe is communicated with the inside of the powder making tank, the other end of the exhaust pipe is connected with a condensing tank, an air pressure balancing port is formed in the top of the condensing tank to be communicated with the outside, and the return pipe is connected between the condensing tank and the cooling pool.

2. The precious metal alloy smelting and powder making water circulation all-in-one machine as claimed in claim 1, wherein: the extending lines of the plurality of water channel holes in the radial direction of the spray disk are staggered at two sides or more sides of the circle center.

3. The precious metal alloy smelting and powder making water circulation all-in-one machine as claimed in claim 2, wherein: the extension lines of the plurality of water channel holes in the radial direction of the spray disk are symmetrically arranged in a staggered manner by taking the circle center as the center.

4. The precious metal alloy smelting and powder making water circulation all-in-one machine as claimed in claim 1, wherein: the chucking spare includes connecting plate, guide sleeve seat, rocker, connecting rod, guide arm, jam plate, the upper end of connecting plate with make powder jar outer wall fixed connection, the both ends of alignment pressure disk are connected to the lower extreme, and the guide sleeve seat is fixed in the lower extreme of connecting plate, offers the vertical perforating hole that supplies the guide arm to pass inside the guide sleeve seat, and the one end of rocker is used for personnel's hand to grip, and the other end is articulated with the connecting plate, and the one end of connecting rod is articulated with the rocker, and the other end is articulated with the guide arm, and the guide arm passes vertical perforating hole, end connection jam plate, and the jam plate is used for the upper flange of block collection jar.

5. The precious metal alloy smelting and powder making water circulation all-in-one machine as claimed in claim 1, wherein: the condensing tank is a conical hollow pipe body, the side wall of the condensing tank is a water cooling sleeve and is used for introducing cooling water, the exhaust pipe is tangent to the side wall of the condensing tank, the return pipe is also connected with the side wall of the condensing tank, and the opening of the return pipe is higher than the bottom of the condensing tank.

6. The precious metal alloy smelting and powder making water circulation all-in-one machine as claimed in claim 1, wherein: the water circulation system also comprises a circulating pipe and a circulating pump, the circulating pipe is connected between the cooling pool and the spray tray, and the circulating pump is arranged on the circulating pipe so as to pump the clear water after precipitation and separation back to the spray tray for the second time to form high-pressure water mist.

7. The precious metal alloy smelting and powder making water circulation all-in-one machine as claimed in claim 6, wherein: an overflow pipe is arranged between the return pipe and the powder making tank so as to overflow a higher water level in the powder making tank into the cooling pool.

8. The precious metal alloy smelting and powder making water circulation all-in-one machine as claimed in claim 7, wherein: the anti-collecting pipe is obliquely connected between the condensing tank and the powder making tank, the anti-collecting pipe is connected with the bottom of the condensing tank, the condensing tank is provided with a conical bottom, and the side wall of the condensing tank is provided with a back flushing pipe so as to be connected with external high-pressure water.

Technical Field

The invention relates to the technical field of precious metal powder making and granulating, in particular to a precious metal alloy smelting and powder making water circulation all-in-one machine.

Background

In the prepared metal powder, compared with the powder with an irregular shape, the spherical powder has the superior performances of good fluidity, good sintering property, controllable reaction and the like, and is increasingly widely applied to mass production and scientific research.

Most of the existing powder making equipment adopts an atomization mode, high-pressure water mist is sprayed to form cutting force on metal particles, the metal particles are scattered to form powder particles, however, the metal particles formed by powder making of the existing device are uneven in size and extremely low in balling rate, so that the flowability of metal powder is poor, the specific volume after sintering cannot be controlled, the instantaneous pressure in the powder making process is increased, and potential safety hazards exist in a powder making tank due to overlarge pressure.

Disclosure of Invention

It is necessary to provide a precious metal alloy smelting and powder making water circulation integrated machine.

A precious metal alloy smelting powder making water circulation all-in-one machine comprises a powder making tank, a collecting tank, a spray disc and a water circulation system, wherein the powder making tank is a hollow tank body, the spray disc is arranged at an inlet above the powder making tank, the collecting tank is arranged at an outlet below the powder making tank, the spray disc is a disc body, a runner hole for molten alloy liquid to flow out is formed in the axis of the spray disc, the upper port of the runner hole is used for receiving the molten alloy liquid, the lower port of the runner hole is communicated with the powder making tank, a plurality of water channel holes are formed in the spray disc, one end of each water channel hole is communicated with the outer wall of the spray disc and is used for being connected with an external high-pressure water spraying system, the other end of each water channel hole is communicated with the runner hole or the bottom of the spray disc, the plurality of water channel holes are uniformly distributed in the circumferential direction of the spray disc, the water channel holes are obliquely arranged in the spray disc, the extension lines of the inclination directions of the plurality of the water channel holes are arranged in a staggered mode in the height of the axial direction of the spray disc, so that the extension lines of water mist sprayed from the water channel holes are arranged in the axial direction of the spray disc in a staggered mode, the collecting tank is open-top's a jar body, the oral area of collecting tank is the same with the below export bore of making the powder jar, still is making the below export installation lower flange of powder jar, installs the flange at the opening part of collecting tank, sets up docking mechanism in the below exit of making the powder jar, docking mechanism is including relative two chucking spare, alignment pressure disk, alignment screw rod, alignment arc that set up, and two chucking spare have the looks isostructure, fixed the setting in the lower flange relative both sides of making the powder jar respectively, and the alignment pressure disk surrounds the collecting tank setting, and connects two chucking spares as an organic whole, sets up the screw that supplies the alignment screw rod to pass on the alignment pressure disk, and the one end and the alignment pressure disk threaded connection of alignment screw rod, the alignment arc are connected to the other end, the alignment arc is used for contacting with the outer wall of collecting tank, water circulating system includes blast pipe, condensing tank, The powder making device comprises a return pipe and a cooling pool, wherein one end of the exhaust pipe is communicated with the inside of the powder making tank, the other end of the exhaust pipe is connected with a condensing tank, an air pressure balancing port is formed in the top of the condensing tank to be communicated with the outside, and the return pipe is connected between the condensing tank and the cooling pool.

Preferably, the extended lines of the plurality of water channel holes in the radial direction of the spray disk are staggered and positioned at two sides or more sides of the circle center.

Preferably, the extension lines of the plurality of water channel holes in the radial direction of the spray disk are symmetrically arranged in a staggered manner by taking the circle center as the center.

Preferably, the chucking spare includes connecting plate, guide sleeve seat, rocker, connecting rod, guide arm, jam plate, the upper end of connecting plate with make powder jar outer wall fixed connection, the both ends of alignment pressure disk are connected to the lower extreme, the guide sleeve seat is fixed in the lower extreme of connecting plate, sets up the vertical perforating hole that supplies the guide arm to pass inside the guide sleeve seat, the one end of rocker is used for personnel's hand to grip, the other end is articulated with the connecting plate, the one end of connecting rod is articulated with the rocker, the other end is articulated with the guide arm, the guide arm passes vertical perforating hole, end connection jam plate, the jam plate is used for the upper flange of block collection jar.

Preferably, the condensing tank is a conical hollow pipe body, the side wall of the condensing tank is a water cooling sleeve and is used for introducing cooling water, the exhaust pipe is tangent to the side wall of the condensing tank, the return pipe is also connected with the side wall of the condensing tank, and the opening of the return pipe is higher than the bottom of the condensing tank.

Preferably, the water circulation system further comprises a circulating pipe and a circulating pump, the circulating pipe is connected between the cooling pool and the spray tray, and the circulating pump is arranged on the circulating pipe so as to pump the clear water subjected to precipitation and separation back to the spray tray for the second time to form high-pressure water mist.

Preferably, an overflow pipe is further arranged between the return pipe and the powder making tank so as to overflow a higher water level in the powder making tank into the cooling pool.

Preferably, a back-collecting pipe is further arranged between the condensing tank and the powder making tank, the back-collecting pipe is obliquely connected between the condensing tank and the powder making tank, the back-collecting pipe is connected with the bottom of the condensing tank, the condensing tank is provided with a conical bottom, and a back-flushing pipe is further arranged on the side wall of the condensing tank to be connected with external high-pressure water.

According to the invention, the extending direction of the water channel hole is adjusted, the spraying direction of the high-pressure water mist is controlled, the movement direction of the cut metal particles is changed, the metal particles form a rolling movement trend, the balling rate is high, the specific volume of the metal powder is easy to measure and control, the fluidity is good, and the air pressure in the powder making tank during pouring is balanced through a water circulation system, so that safe pouring is realized.

Drawings

Fig. 1 is a schematic structural diagram of the device.

Fig. 2 and 3 are schematic views of two states of the clamping piece. Fig. 23 shows the locked state and fig. 24 shows the unlocked state.

Fig. 4 is a schematic top view of a spray disk according to an embodiment. The embodiment is provided with two water channel holes, and the spray disk spray outlets are arranged in a staggered manner in the axial direction and are respectively arranged in a staggered manner towards the two sides of the circle center in the radial direction of the extension line of the spray outlets.

Fig. 5 is a developed cross-sectional view along the stepped portion of the water passage hole of fig. 4, showing an internal structure of the water passage hole. The structure below the L-line in the drawing is an extended hypothetical structure, and the extended hypothetical structure is shown in the drawing to express the extending direction of the water passage hole, but not the structure actually possessed by the spray plate.

Fig. 6 is a schematic top view of a spray disk of a second embodiment. The embodiment is provided with three water channel holes, and the spray disk spray outlets are arranged in a staggered manner in the axial direction and in a staggered manner around the circle center in the radial direction of the extension line of the spray outlets.

Fig. 7 is a cross-sectional view of the water passage hole of fig. 6 sequentially (a 1, a2, A3) in a stepped manner, showing an internal structure of the water passage hole. The structure below the L-line in the drawing is an extended hypothetical structure, and the extended hypothetical structure is shown in the drawing to express the extending direction of the water passage hole, but not the structure actually possessed by the spray plate.

Fig. 8 is a schematic top view of a spray disk of a third embodiment. The embodiment is provided with four water channel holes, and the spray disk spray outlets are arranged in a staggered manner in the axial direction and in a staggered manner around the circle center in the radial direction of the extension line of the spray outlets.

Fig. 9 is a cross-sectional view of the water passage hole of fig. 8 sequentially (B1, B2, B3, B4) in a stepped manner, showing an internal structure of the water passage hole. The structure below the L-line in the drawing is an extended hypothetical structure, and the extended hypothetical structure is shown in the drawing to express the extending direction of the water passage hole, but not the structure actually possessed by the spray plate. It can be seen that the positions of the plurality of water passage holes extending to the ejection ports of the flow passage holes are staggered.

Fig. 10 and 11 are schematic diagrams of extension lines of the high-pressure water mist sprayed along the water passage holes in fig. 4 and 5, wherein arrows indicate the spraying flow direction of the water mist. Therefore, the high-pressure water mist can not collide against the center of the circle and the axis, and the cut metal particles have a clockwise rotation trend in the horizontal radial direction and a clockwise rotation trend in the vertical direction under the action of cutting force.

Fig. 12 and 13 are schematic diagrams of extension lines of the high-pressure water mist sprayed along the water passage holes in fig. 6 and 7, wherein arrows indicate the spraying flow direction of the water mist. Therefore, the high-pressure water mist can not collide against the center of the circle and the axis, and the cut metal particles have a clockwise rotation trend in the horizontal radial direction and a clockwise rotation trend in the vertical direction under the action of cutting force.

Fig. 14 and 15 are schematic diagrams illustrating extension lines of the high-pressure water mist sprayed from fig. 8 and 9 along the water passage holes, wherein arrows indicate the spraying directions of the water mist. Therefore, the high-pressure water mist can not collide against the center of the circle and the axis, and the cut metal particles have a clockwise rotation trend in the horizontal radial direction and a clockwise rotation trend in the vertical direction under the action of cutting force.

Fig. 16, 18 and 20 are top sectional views of two water passage holes, three water passage holes and four water passage holes in the prior art. The extension lines of the water channel holes are opposite to the circle center, so that the sprayed water mist is gathered at the circle center of the spraying disc, and the water mist is opposite to the collision.

Fig. 17, 19, and 21 are schematic internal structural views taken along a stepped section of the water passage hole in the axial direction corresponding to fig. 16, 18, and 20. In the figure, the heights of the spray outlets of the water channel holes are consistent in the axial direction, and the extension lines of the water channel holes are converged at the axle center of the spray plate, so that the water mist is in direct alignment and collision.

Fig. 22 is a scheme that the water channel holes are offset towards one side of the circle center in the original design, and it can be seen that although water mist sprayed along the water channel holes cannot be directly opposite to the collision, the acting force of the high-pressure water mist on the cut metal particles is not in the same direction, so that the metal particles cannot form a rolling trend.

FIG. 23 is a schematic view of a partial structure of the powder making tank and the collecting tank.

Fig. 24 is a partially enlarged view of fig. 23.

Fig. 25 is a top view of a condensation tank.

Fig. 26 is a graph of the high power particle shape of the atomized powder after use of the spray disk of fig. 6 of the present invention.

In the figure: the powder making tank 10, the docking mechanism 12, the clamping member 121, the connecting plate 1211, the guide sleeve seat 1212, the rocker 1213, the connecting rod 1214, the guide rod 1215, the locking plate 1216, the alignment pressure plate 122, the alignment screw 123, the alignment arc plate 124, the collecting tank 20, the spray plate 30, the flow passage hole 31, the water passage hole 32, the exhaust pipe 41, the condensation tank 42, the return pipe 43, the cooling pool 44, the circulating pipe 45, the circulating pump 46, the overflow pipe 47, the reverse collecting pipe 48 and the reverse flushing pipe 49.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Referring to fig. 1-9, the invention provides a precious metal alloy smelting and powder making water circulation integrated machine, which comprises a powder making tank 10, a collection tank 20, a spray plate 30 and a water circulation system, wherein the powder making tank 10 is a hollow tank body, the spray plate 30 is installed at an inlet on the upper part of the powder making tank 10, the collection tank 20 is installed at an outlet on the lower part of the powder making tank 10, the spray plate 30 is a disk body, a runner hole 31 for molten alloy liquid to flow out is formed in the axis of the spray plate 30, the upper end opening of the runner hole 31 is used for receiving the molten alloy liquid, the lower end opening is communicated with the powder making tank 10, a plurality of water channel holes 32 are formed in the spray plate 30, one end of each water channel hole 32 is communicated with the outer wall of the spray plate 30 and is used for being connected with an external high-pressure water spraying system, the other end of each water channel hole is communicated with the runner hole 31 or the bottom of the spray plate 30, the plurality of water channel holes 32 are uniformly distributed in the circumferential direction of the spray plate 30, the water channel holes 32 are obliquely arranged in the spray plate 30, the extension lines of the inclined directions of the plurality of water passage holes 32 are arranged in a height staggered manner in the axial direction of the spray disc 30, so that the extension lines of water mist sprayed out along the water passage holes 32 are arranged in a height staggered manner in the axial direction of the spray disc 30, the collecting tank 20 is a tank body with an opening at the top, the mouth part of the collecting tank 20 is the same as the caliber of a lower outlet of the powder making tank 10, a lower flange is arranged at the lower outlet of the powder making tank 10, an upper flange is arranged at the opening of the collecting tank 20, the lower outlet of the powder making tank 10 is provided with the docking mechanism 12, the docking mechanism 12 comprises two clamping pieces 121, an alignment pressure plate 122, an alignment screw rod 123 and an alignment arc-shaped plate 124 which are oppositely arranged, the two clamping pieces 121 have the same structure and are respectively and fixedly arranged at the two opposite sides of the lower flange of the powder making tank 10, the alignment pressure plate 122 surrounds the collecting tank 20, and connects the two clamping pieces 121 into a whole, and a screw hole for the alignment screw rod 123 to pass through is arranged on the alignment pressure plate 122, alignment arc 124 is connected with alignment pressure disk 122 threaded connection to the one end and the alignment of alignment screw 123, alignment arc 124 be used for with the outer wall contact of collecting tank 20, water circulating system includes blast pipe 41, condensate tank 42, back flow 43, cooling tank 44, the one end of blast pipe 41 with make the inside intercommunication of powder jar 10, the condensate tank 42 is connected to the other end, and the atmospheric pressure balance mouth is seted up at the top of condensate tank 42 to communicate with the external world, back flow 43 is connected between condensate tank 42 and cooling tank 44.

In this scheme, when the collecting tank 20 was placed in making powder jar 10 below, the two oral area just right, however manual installation can not guarantee its upper and lower just right, so adjust the two just right through docking mechanism 12, chucking spare 121 has realized demountable installation, highly being located collecting tank 20's height of alignment pressure disk 122 and alignment screw 123, adjust collecting tank 20's position through adjustment alignment screw 123, make it coaxial with making powder jar 10 concentric, just from top to bottom.

When the collecting tank is used, the alignment screw rod 123 is screwed to the retracted position, the collecting tank 20 can be installed close to the alignment pressure plate 122, then the alignment screw rod 123 is screwed, the collecting tank 20 gradually moves towards the center until the collecting tank and the collecting tank are vertically opposite, and then the clamping piece 121 is locked to finish installation.

The extension line of water channel hole 32 is at the highly staggered arrangement of spout dish 30 axial direction for spun water smoke also is at the high direction dislocation arrangement, forms the dislocation cutting dispersion to the metal liquid during blowout, and at first can make the granularity that the metal liquid is dispersed littleer, and secondly, the dislocation cutting makes the metal grain after being cut all bear clockwise or anticlockwise equidirectional cutting force from top to bottom both sides, does benefit to the metal grain and forms rolling motion trend, does benefit to and forms spherical granule.

The intermediate frequency furnace melts the purified alloy blocks to form molten metal, the molten metal is poured into the runner hole 31 of the spray tray 30 through a leakage ladle, the temperature of the molten metal is very high at the moment and reaches hundreds of degrees or thousands of degrees, when high-pressure water mist is encountered, very large steam is generated instantly, the air pressure in the powder making tank 10 is greatly increased, the exhaust pipe 41 discharges the water vapor with very high pressure into the condensation tank 42, and the condensed water flows into the cooling pool 44 to be collected, cooled and separated, so that the safety of the powder making tank 10 is ensured.

Further, referring to fig. 4-15, the extension lines of the plurality of water passage holes 32 in the radial direction of the spray plate 30 are offset at two or more sides of the center of the circle. The radial direction is staggered, so that the sprayed water mist cannot be directly opposite to and collide with each other in the radial direction, and irregular high-pressure spraying force is avoided.

Furthermore, the extension lines of the plurality of water passage holes 32 in the radial direction of the spray plate 30 are symmetrically arranged in a staggered manner with the center of a circle as the center.

The radial direction is staggered, so that the sprayed water mist can not just collide in the radial direction, but form staggered cutting force, the cutting force in the same clockwise or anticlockwise direction is borne by the left side, the right side, the front side and the rear side of the cut metal particles in the horizontal direction (namely the radial direction of the spray disk 30), a rotating force similar to circular motion is formed, the metal particles can move in a rolling manner, and spherical particles can be formed.

In the prior art and other schemes, as shown in fig. 16-21, the water passage hole 32 is arranged such that the extension lines of the spray outlets intersect at the center of the circle or the axis of the spray disk 30, so that the sprayed water mist is aligned to the center of the circle or the axis, and the impact force on the metal particles is large, which is beneficial to forming small particles, but the high-pressure water mist after collision has an irregular movement trend, and the cut metal particles can only be dispersed under the action of irregular force or self gravity. I adopted the spray plate 30 mould before as shown in FIG. 22, and now improved to the scheme as shown in FIG. 6, the metal powder formed by atomization of the spray plate 30 before was observed by an electron microscope, and the internal balling rate is calculated to be lower than 40%, while the internal balling rate in unit area is calculated to be higher than 90% by the electron microscope observation of the metal powder formed by atomization of the improved spray plate 30 as shown in FIG. 26.

Further, the clamping member 121 comprises a connecting plate 1211, a guide sleeve seat 1212, a rocker 1213, a connecting rod 1214, a guide rod 1215 and a locking plate 1216, wherein the upper end of the connecting plate 1211 is fixedly connected with the outer wall of the powder making tank 10, the lower end of the connecting plate 1211 is connected with two ends of the alignment pressure plate 122, the guide sleeve seat 1212 is fixed at the lower end of the connecting plate 1211, a vertical through hole for the guide rod 1215 to pass through is formed in the guide sleeve seat 1212, one end of the rocker 1213 is used for being held by a human hand, the other end of the rocker 1213 is hinged to the connecting plate 1211, one end of the connecting rod 1214 is hinged to the rocker 1213, the other end of the connecting rod 1215 is hinged to the guide rod 1215, the guide rod 1215 passes through the vertical through hole, the end of the vertical through hole is connected with the locking plate 1216, and the locking plate is used for clamping the upper flange of the collection tank 20.

Further, the condensing tank 42 is a conical hollow pipe body, the side wall of the condensing tank 42 is a water cooling jacket for introducing cooling water, the exhaust pipe 41 is tangent to the side wall of the condensing tank 42 to be communicated with the inside of the condensing tank 42, so that water vapor enters the tank body in a swirling manner, contacts with the side wall, is cooled and condensed at an accelerated speed, the return pipe 43 is also connected with the side wall of the condensing tank 42, and the opening of the return pipe 43 is higher than the bottom of the condensing tank 42.

Referring to fig. 23-25, the water circulation system further includes a circulation pipe 45 and a circulation pump 46, the circulation pipe 45 is connected between the cooling tank 44 and the spray tray 30, and the circulation pump 46 is disposed on the circulation pipe 45 to pump the separated clear water into the spray tray 30 for a second time to form high-pressure water mist.

Further, an overflow pipe 47 is provided between the return pipe 43 and the powder producing tank 10 to overflow a higher water level in the powder producing tank 10 into the cooling tank 44.

Further, a back-collecting pipe 48 is provided between the condensing tank 42 and the powder making tank 10, the back-collecting pipe 48 is connected between the condensing tank 42 and the powder making tank 10 in an inclined manner, the back-collecting pipe 48 is connected to the bottom of the condensing tank 42, the condensing tank 42 has a tapered bottom, and a back-flushing pipe 49 is provided on the side wall of the condensing tank 42 to be connected to external high-pressure water.

During implementation, control valves are arranged on the pipelines, when powder is manufactured by pouring, the reverse collecting pipe 48 and the reverse washing pipe 49 are closed, after the pouring is finished, the reverse collecting pipe 48 and the reverse washing pipe 49 are opened, high-pressure water is introduced into the reverse washing pipe 49 to wash the interior of the condensation tank 42, and the washing liquid flows back to the powder manufacturing tank 10. Because the metal for powder making in the invention is precious metal such as platinum, palladium, rhodium and the like, the value is very high, metal particles with smaller particle size are mixed in high-pressure steam and are remained in the condensing tank 42 after condensation, in order to collect the precious metal powder to the maximum extent, a backwashing pipe 49 and a backwashing pipe 48 are arranged, the residual metal particles in the condensing tank 42 are recovered, and the powder making yield is increased.

The modules or units in the device of the embodiment of the invention can be combined, divided and deleted according to actual needs.

The above disclosure is only illustrative of the preferred embodiments of the present invention, which should not be taken as limiting the scope of the invention, but rather the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It will be understood by those skilled in the art that all or a portion of the above-described embodiments may be practiced and equivalents thereof may be resorted to as falling within the scope of the invention as claimed. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.