CN212100700U - High-purity gallium pearl apparatus for producing - Google Patents

Abstract

The utility model discloses a high-purity gallium bead production device, which comprises a gallium storage box, a pumping system and a condensation conveying system; the pumping system comprises a pump pipe and a peristaltic pump arranged on the pump pipe, a feed port of the pump pipe is connected to the bottom of the gallium storage box, a discharge port of the pump pipe extends to the upper part of the condensation conveying system, and the peristaltic pump intermittently pumps gallium liquid in the gallium storage box to the condensation conveying system through the pump pipe; condensation conveying system includes a plurality of condensation pieces of accepting pump line discharge gate gallium liquid drippage that arrange on conveyer belt and the conveyer belt, the butt joint of the conveying end of conveyer belt is provided with the receipts storage bucket of collecting the gallium pearl behind the condensation. The utility model provides a pair of high-purity gallium pearl apparatus for producing easy operation can realize the automatic batch production of gallium pearl granule, and the high-purity gallium pearl homogeneity that obtains is good and the particle diameter of gallium pearl is controllable.

Description

High-purity gallium pearl apparatus for producing

Technical Field

The utility model belongs to rare technology of production, concretely relates to high-purity gallium pearl apparatus for producing and production method.

Background

Gallium (galium) is a grayish blue or silvery white, rare metal, the symbol Ga, atomic number 31, atomic weight 69.72. Pure liquid gallium has significant supercooling and solidifies at-18 ℃ without interference after melting. But the solidification speed is obviously accelerated under the conditions of nucleation, vibration and the like.

The gallium has wide application, is entitled 'ridge beam in electronic industry', is mainly used for preparing semiconductor gallium nitride, gallium arsenide and gallium phosphide, and is also mainly used as a doping agent of semiconductor materials such as silicon, germanium and the like. Pure gallium and its low-melting alloys can be used as thermal media for nuclear reactions and as fillers for high-temperature thermometers, and as catalysts for the di-esterification in organic reactions. In addition, the high-purity gallium has wide application in solar cells, the medical field, glass manufacturing and the chemical industry.

In the polysilicon solar industry, high purity gallium is mainly made into gallium beads, which are used as a dopant for polysilicon. In actual production, the resistivity distribution of the gallium-doped polycrystalline silicon wafer is wide, the requirement of producing qualified solar silicon wafers with the resistivity of 0.8-3 omega is met, more and more attention is paid, the production scale is larger and larger, and the demand for highly pure gallium beads is larger and larger. Based on the background, the market is eagerly demanding an automatic production device and method for high-purity gallium beads.

The existing production methods for high-purity gallium beads or high-purity gallium particles include two methods, namely casting production and dripping condensation.

Regarding the mode of producing gallium beads by casting, the chinese patent application with application number 200820108905 discloses a granulating device of high-purity gallium particles, which carries out a production mode similar to casting molding after a lower granulating mold body and an upper granulating mold body are buckled and matched, the size of the gallium particles produced by the production mode is limited by a cavity inside the mold, and the gallium particles with different sizes cannot be produced.

The mode of producing gallium particles by adopting dripping condensation is more commonly applied, for example, a device and a method for preparing raindrop-shaped high-purity gallium pellets disclosed by Chinese patent application No. 200810155685, a device for preparing micro gallium pellets with different sizes disclosed by Chinese patent application No. 201120258486 and a method for preparing gallium pellets disclosed by Chinese patent application No. 201110423021, liquid gallium is dripped through a small channel under the action of self gravity, and then the dripped gallium liquid drops are condensed to form solid gallium pellets.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be: aiming at the problem of low efficiency in the production of gallium particles by dripping and condensing, the production device and the production method which can realize automatic large-scale production of high-purity gallium beads are provided.

The utility model discloses a following technical scheme realizes:

a high-purity gallium bead production device comprises a gallium storage box, a pumping system and a condensation conveying system;

the pumping system comprises a pump pipe and a peristaltic pump arranged on the pump pipe, a feed port of the pump pipe is connected to the bottom of the gallium storage box, a discharge port of the pump pipe extends to the upper part of the condensation conveying system, and the peristaltic pump intermittently pumps gallium liquid in the gallium storage box to the condensation conveying system through the pump pipe;

the condensation conveying system comprises a conveying belt and a condensation block arranged on the conveying belt and used for receiving gallium liquid drops at a discharge port of the pump pipe, and the conveying tail end of the conveying belt is butted with a material receiving barrel used for collecting condensed gallium beads.

In the high-purity gallium pearl apparatus for producing among the above-mentioned scheme, store up the gallium case and include big case and the small box of bottom mutual intercommunication, the bottom and the pump line connection of small box, big case passes through the dropping liquid pipe and communicates with the dropping funnel that adds the gallium liquid, be equipped with the control valve on the dropping liquid pipe.

In the high-purity gallium bead production device in the scheme, the volume of the large box is at least ten times that of the small box.

In the high-purity gallium pearl apparatus for producing in above-mentioned scheme, store up gallium case and dropping funnel's outer wall and all be equipped with the heat preservation.

In the high-purity gallium bead production device in the scheme, the condensing blocks are condensing agents, cold chains or semiconductor refrigerating blocks, and the plurality of the condensing blocks are arranged at equal intervals along the conveying direction of the conveying belt.

In the high-purity gallium bead production device in the scheme, the pumping system comprises at least two pump pipes connected with the gallium storage box, the feed inlets of all the pump pipes are provided with the discharge valves, and the discharge outlets of all the pump pipes are distributed above the condensation block along the transverse direction of the conveyor belt.

In the high-purity gallium bead production device in the scheme, the conveying tail end of the conveying belt is further provided with a material blocking rod for shifting condensed gallium beads from the condensing block, the material blocking rod is obliquely arranged above the cold-condensed blocks relative to the conveying direction, the gap between the material blocking rod and the condensing block is smaller than the height of the condensed gallium beads, and the material receiving barrel is arranged close to the tail end of the material blocking rod.

In the high-purity gallium bead production device in the scheme, the material blocking rods are two oppositely and obliquely arranged, and a conveying discharge port is formed between the oblique tail ends of the two material blocking rods.

In the high-purity gallium bead production device in the scheme, inert coatings which do not react with gallium or inert materials which do not react with gallium are arranged at the contact positions of the gallium storage tank, the pumping system and the condensation conveying system with gallium.

The utility model discloses an among the high-purity gallium pearl apparatus for producing, the conveying motor of conveyer belt adopts buncher, relative constant speed sets up between the rotational speed of peristaltic pump and buncher's the rotational speed.

The utility model discloses a gallium pearl shaping control is realized through pump line and peristaltic pump, and the peristaltic pump falls into a plurality of sections gallium liquid sections with the inside continuous gallium fluid of pump line, guarantees the uniformity of every section gallium liquid section, and final fashioned gallium pearl homogeneity is better, can control the liquid gallium quality of gallium liquid section through the rotational speed of selecting the pump line of different diameters and peristaltic pump, reaches the purpose of controlling final shaping gallium pearl size.

The utility model provides a store up gallium case comprises great big case and the small box of volume phase difference, communicate each other between two bottom half and form the linker structure, whole storage gallium case outside utilizes the heat preservation heating to keep warm, the liquid gallium raw materials of production gallium pearl is added into big incasement portion by the dropping liquid funnel, the small box is when connecting the pump line production gallium pearl, the outflow of the inside liquid gallium of small box is big, the liquid level descends soon, the big case supplements liquid gallium to small incasement portion at any time through bottom intercommunication mouth, can keep the liquid level height of the volume small incasement keep with big incasement portion basic unanimity like this, big case volume will obviously be greater than the small box, can slowly reduce the inside liquid gallium liquid level of small case and descend too soon. Meanwhile, compared with the volume of the liquid gallium in the large box, the liquid gallium added by the dropping funnel has much smaller supplemented volume, the liquid level of the liquid gallium added in the large box does not change greatly, and the height of the liquid level of the gallium can be kept constant through the buffering of the large box. Therefore, the phenomenon that the size change of gallium liquid dripping is influenced by the disorder of the flow speed of the gallium liquid flowing into the pump pipe due to overlarge pressure change inside the gallium storage box can be avoided.

The utility model discloses still with the condensation of gallium liquid drop and the integrated condensation transfer system that sets up of conveying, whole condensation transfer system passes through the conveying realization of buncher control, set up the cold coagulation piece on the conveyer belt, liquid gallium pearl condenses into the solid gallium pearl under the condensation piece effect on falling to the conveyer belt, carry out the condensation through condensation transfer system to the gallium liquid drop of drippage and form the gallium pearl, the conveying is concentrated at the in-process of gallium liquid drop condensation shaping gallium pearl, and collect in unison behind the condensation shaping, produce simultaneously through many pump lines, can realize the batch automated production of gallium pearl.

To sum up, the utility model provides a pair of high-purity gallium pearl apparatus for producing easy operation can realize the automatic batch production of gallium pearl granule, and the high-purity gallium pearl homogeneity that obtains is good and the particle diameter of gallium pearl is controllable.

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a high-purity gallium bead production apparatus according to an embodiment.

FIG. 2 is a schematic diagram of gallium liquid segmentation formed inside a pump tube by a peristaltic pump in the embodiment.

Fig. 3 is a schematic diagram of the condensation and transportation process of gallium droplets on a conveyor belt in the example.

Reference numbers in the figures: 11-a dropping funnel, 111-a heat-insulating layer, 12-a gallium storage box, 121-a large box, 122-a small box, 123-a communication port, 124-a heat-insulating layer, 13-a dropping pipe, 14-a control valve, 15-a discharge valve,

21-pump tube, 22-peristaltic pump,

31-a conveyor belt, 32-cold congelation, 33-a conveying motor, 34-a material blocking rod, 341-a conveying discharge hole, 342-a fixed seat,

and 4, a material receiving barrel.

100-gallium liquid, 101-gallium liquid segment, 200-gallium liquid drop and 201-gallium bead.

Detailed Description

Examples

Referring to fig. 1, a high-purity gallium pearl apparatus for producing in the figure is a specific embodiment of the present invention, including dropping funnel 11, gallium storage box 12, dropping liquid pipe 13, control valve 14, baiting valve 15, pump line 21, peristaltic pump 22, conveyer belt 31, condensation piece 32, conveyer motor 33, material blocking rod 34 and collecting vessel 4. The device mainly comprises a gallium storage box 12, a pumping system and a condensation conveying system, wherein the gallium storage box 12 is used for storing a raw material-gallium liquid 100 for producing gallium beads, and metal gallium is heated into the liquid gallium liquid 100 and then added into the gallium storage box 12 through a dropping funnel 11; the pumping system comprises a pump pipe 21 and a peristaltic pump 22, the pump pipe 21 leads out the gallium liquid 100 from the interior of the gallium storage box 12, the peristaltic pump 22 is arranged on the pump pipe 21, the continuous gallium liquid in the pump pipe 21 is divided into a plurality of gallium liquid sections at intervals, and the gallium liquid sections are pumped one by one and dropped on the condensation conveying system; the condensation conveying system comprises a conveying belt 31 and a plurality of condensation blocks 32 arranged on the conveying belt and used for carrying gallium liquid section dripping, the condensation blocks 32 condense the gallium liquid drops 200 dripping on the condensation blocks into solid gallium beads, the condensation blocks 32 and the gallium liquid drops 200 on the condensation blocks are conveyed along with the conveying belt 31, and the material collecting barrel 4 is arranged at the conveying tail end of the conveying belt and used for collecting the condensed solid gallium beads.

Specifically, the gallium storage tank 12 in this embodiment is made of stainless steel, and a clean inert coating, such as polytetrafluoroethylene, is sprayed on the contact portion of the inner wall and the gallium liquid, so as to prevent the gallium liquid from reacting with the gallium storage tank; store up gallium incasement 12 inside through setting up the baffle with inside branch into big case 121 and 122 two parts box, wherein the inside volume of big case 121 is ten times at least for little case 122, remain certain clearance between baffle and the box bottom plate of storing up gallium case 12 and form intercommunication mouth 123, communicate big case 121 and little case 122 bottom each other, big case 121 is inside to set up the dropping liquid pipe 13 that is connected to dropping funnel 11, be used for to storing up gallium case 121 inside interpolation gallium liquid 100, be equipped with the control valve 14 of control interpolation gallium liquid 100 on the dropping liquid pipe 13, the bottom and the pump line 21 of little case 122 are connected, the inside gallium liquid of little case 122 flows into inside the pump line 21 under the effect of gravity.

In order to improve the production efficiency, the bottom of the small box 122 is simultaneously connected with a plurality of pump pipes to simultaneously produce gallium beads, so that the consumption of the gallium liquid 100 in the small box 122 is increased, the liquid level of the gallium liquid 100 in the small box 122 is reduced quickly, if the control is not performed, the pressure in the small box 122 can be changed greatly, the flow velocity of the gallium liquid flowing into the pump pipe 21 can be influenced by the overlarge pressure change, and further the peristaltic pump 22 is uneven in segmenting the gallium liquid in the pump pipes, so that the size of the gallium liquid finally formed by dripping is uneven. This embodiment is through combining with big case 121 that sets up and little case 122 intercommunication, two bottom half portions link to each other through the intercommunication mouth 123 in less clearance, and big case 121 internal volume is far greater than little case 122 internal volume, after the inside gallium liquid level of little case 122 begins to descend, because the principle of linker, inside gallium liquid 100 of big case 121 continuously supplyes inside little case 122 through intercommunication mouth 123, reduce the inside gallium liquid level decline speed of little case 122, simultaneously, pour into inside big case 121 with fused gallium liquid 100 through dropping funnel 11, the injection quantity is balanced with the gallium liquid flow that flows into in the pump line, it is highly invariable to maintain the gallium liquid level in whole gallium storage case 12, and then guarantee that the inside gallium liquid flow of pump line 21 is stable.

In order to ensure that the gallium liquid 100 is always kept in a liquid state before dropping, in this embodiment, the outer wall of the dropping funnel 11 and the outer wall of the gallium storage box 12 are respectively provided with the heat insulating layer 111 and the heat insulating layer 124, and the heat insulating layer is used to maintain the gallium liquid inside the dropping funnel 11 and the gallium storage box 12 to be always in a temperature environment where the gallium liquid is melted into the liquid state.

One end of a feed port of a pump pipe 21 of the pumping system is connected to the bottom of a small box 122 of the gallium storage box 12, the bottom of the small box 122 is provided with a funnel outlet which is butted with the pump pipe 21, one end of a discharge port of the pump pipe 21 extends to the upper part of the condensation conveying system, the whole pump pipe 21 is positioned below the horizontal plane of the bottom of the small box 122, and the pump tube is prevented from extending upwards, the gallium liquid in the small box 122 enters the pump tube 21 under the action of gravity, the peristaltic pump 22 is arranged on the pump tube 21, the gallium liquid 100 in front of the peristaltic pump 22 is continuous fluid filled in the pump tube 21, and after passing through the peristaltic pump 22, the peristaltic pump 22 segments the continuous fluid gallium liquid 100 inside the pump tube into a plurality of equally spaced gallium liquid segments 101, as shown in fig. 2, the gallium liquid segment 101 is made to intermittently pump the discharge port of the pump pipe 21, and the gallium liquid segment 101 drops spherical gallium liquid drops 200 onto the condensing and conveying system due to gravity and surface tension. The peristaltic pump 22 rotates at a constant speed, the quality of each gallium liquid section 101 is actively controlled to be more consistent, and gallium bead particles with better consistency can be obtained by a mode of continuously and freely dropping gallium liquid in the prior art.

The pump tube 21 of this embodiment is made of clean PVC, and the material has certain elasticity and stretchability. The ball of the peristaltic pump 22 is rotated to press the pump tube 21, so that continuous gallium liquid 100 in the pump tube is separated in the pump tube at a certain distance to form gallium liquid sections 101 with the same mass, the peristaltic pump 22 with the rotation speed accurately controlled within 1-30rpm is selected, the mass of dropped gallium liquid drops can be controlled by selecting the pump tubes 21 with different inner diameters and adjusting the different pump speeds of the peristaltic pump 22, and the requirements of controlling different particle diameters of gallium beads after condensation molding are met. The peristaltic pump is a conventional device, and the specific structure and operation principle of the peristaltic pump 22 will not be described in detail herein.

In order to realize the large-scale production of gallium beads, the pumping system can be provided with more than two pump pipes 21 which are respectively connected with the small box 122 of the gallium storage box, and the baiting valve 15 is arranged between the feed inlet of all the pump pipes 21 and the bottom outlet of the small box 122, so that the flow of gallium liquid entering the inside of the pump pipes 21 can be adjusted, meanwhile, the pump pipes can be respectively shut down for maintenance, and the normal production of other pump pipes 21 can not be influenced. The discharge ports of all the pump pipes 21 are arranged above the condensing block along the transverse direction of the conveyor belt, and gallium drops dropping from each pump pipe 21 are conveyed along the respective conveying direction before being condensed into a solid state without mutual influence.

Referring to fig. 1 and 3 in combination, the conveyor belt 31 of the condensing conveyor system may take many forms, such as a conveyor belt or a conveyor chain, defining at least one conveying plane, with the discharge opening of the pump tube 21 being disposed above the conveying feed end of the conveying plane. The conveyor belt 31 of this embodiment is formed by splicing long and narrow stainless steel strips or welding the stainless steel strips on a conveyor chain, and the whole conveyor belt 31 is wound on conveyor wheels, wherein one of the conveyor wheels is in transmission connection with a conveyor motor 33 to serve as a driving wheel. The conveyor belt 31 is provided with a central control groove, a plurality of cold congelation blocks 32 are fixedly embedded in the central control groove, the width of each cold congelation block 32 is equal to that of the conveyor belt 31, and all the cold congelation blocks 32 are distributed at equal intervals along the conveying direction of the conveyor belt 31 and are conveyed together with the conveyor belt 31.

The condensation block 32 may condense the gallium droplets dripping thereon by a condensing agent, cold chain or semiconductor chilling block. When adopting condensing agent or cold chain as cold clot 32, can carry out the heat transfer structure of moisturizing cold to condensing agent or cold chain at the fixed setting of bottom conveying section of conveyer belt 31, cold clot 32 after the heat transfer structure moisturizing is carried the conveying plane on upper portion along with conveyer belt 31 after, effectively condenses the gallium liquid drop, the cold clot is accomplishing the gallium pearl condensation and collects the completion after, conveys the bottom once more along with conveyer belt 31 and mends cold once more, so the circulation realizes the automatic continuous production to the gallium pearl. When the semiconductor refrigeration blocks are used as the refrigeration blocks 32, the low temperature required by gallium liquid condensation is actively kept for the semiconductor refrigeration blocks through the access circuit, and after the circuits of all the semiconductor refrigeration blocks are integrated, the circuits can be led out through the driving wheels and the rotary joints to be connected with an external circuit.

The entire surface of the conveyor belt 31 and the surface of the cold coagulation block 32 are flat, and a layer of clean inert material, such as polytetrafluoroethylene, is sprayed on the surfaces, so that gallium liquid contacted on the surfaces is prevented from reacting to influence the quality of gallium beads.

The outlet of the pump tube 21 is located at a distance of 0.5-2 cm above the conveyor belt, so that the gallium drops 200 can still be kept spheroidal without being too flat when they drop onto the condensation mass 32 of the conveyor belt.

Meanwhile, the timing of dropping the gallium drops 200 from the discharge port of the pump tube 21 is matched with the timing of conveying the cold block 32 on the conveyor belt, and the gallium drops 200 are ensured to accurately drop on the area of the cold block 32 but not drop on other positions of the conveyor belt 31. In the embodiment, the speed-adjustable motor with controllable speed is selected for the conveying motor 33 for driving the conveying belt 31, so that the conveying speed of the conveying belt can be accurately controlled, and the relative constant speed setting between the rotating speed of the peristaltic pump 22 and the rotating speed of the conveying motor 33 is ensured, namely, the gallium liquid section 101 segmented by the peristaltic pump 22 in the pump pipe 21 is ensured to be just dropped onto the cold coagulation block 32 on the conveying belt 31 controlled by the conveying motor 33 when dropping from the discharge port of the pump pipe.

Because the peristaltic pump 22 controls the pumping speed through the speed regulating motor, in practical application, the speed regulating motor of the peristaltic pump 22 can also control the conveyor belt 31 through the synchronization of the transmission mechanism, so that the conveying speed of the conveyor belt 31 is matched with the peristaltic pumping speed of the peristaltic pump 22 at a relatively constant speed.

In addition, the conveying speed of the conveyor belt 31 and the conveying length of the conveyor belt 31 are matched with the condensing capacity of the condensing block 32, so that the pump pipe 21 can be condensed into the solid gallium beads 201 after dropping on the condensing block 32 at the conveying feed end of the conveyor belt 31 and before the condensing block 32 is conveyed to the conveying end of the conveyor belt 31.

The solid gallium beads 201 conveyed to the conveying end along with the conveyor belt 31 on the condensing block 32 passively slide down from the surface of the condensing block 32 to the charging basket 4 by the gravity of the solid gallium beads 201 during the downward conveying of the conveyor belt 31, but a certain adhesion force is formed between the gallium liquid drops 200 and the condensing block 32 during the process of condensing the gallium liquid drops into the solid gallium beads 201, and part of the solid gallium beads 201 are not easy to slide down from the condensing block 32. In this embodiment, a fixed material blocking rod 34 is arranged at the conveying end of the conveyor belt 31, and the condensed solid gallium beads are actively stirred from the condensing block 32 and uniformly collected and output by the material blocking rod 34 fixed relative to the conveyor belt 31.

As shown in fig. 3, the dam bar 34 is disposed above the conveyor belt 31 parallel to the conveying plane of the conveyor belt 31, and the gap between the dam bar 34 and the condensation block 32 is smaller than the height of the gallium beads 201 condensed on the cold-agglomerated cake, so that the gallium beads 201 conveyed along with the conveyor belt 31 are separated from the surface of the condensation block 32 by colliding with the dam bar 34.

The material blocking rod 34 is used for conveying and guiding the gallium beads 201 on all conveying planes to output, the material blocking rod 34 is obliquely arranged above the cold coagulation blocks relative to the conveying direction, the gallium beads 201 condensed by the conveyor belt 31 collide with the material blocking rod 34 and are separated from the condensed blocks, the gallium beads are guided along the oblique route of the material blocking rod 34 while being conveyed forwards continuously along the conveyor belt 31, the gallium beads fall off from the conveyor belt 31 after being output through the tail end of the material blocking rod 34, the material collecting barrel 4 is arranged close to the tail end of the material blocking rod, and the dropped gallium beads 201 just fall into the material collecting barrel 4. In this embodiment, two material blocking rods 34 are arranged on the conveyor belt 31, the two material blocking rods 34 are arranged in the same plane and are inclined in opposite directions, that is, the two material blocking rods 34 are inclined in opposite directions, and form a V-shaped funnel structure along the conveying direction of the conveyor belt, a conveying discharge port 341 larger than the gallium bead particle size is formed between the two material blocking rods 34, and after the gallium beads at the conveying end collide with the material blocking rods 34, the gallium beads are respectively conveyed along the two material blocking rods 34 and collected in the conveying discharge port 341 to be collected in the material collecting barrel 4.

One end of the material blocking rod 34 is fixed through a fixing seat 342 fixed on the side edge of the conveyor belt 31, the other end of the material blocking rod is provided with a cantilever arranged above the conveyor belt 31, the material blocking rod 34 is a stainless steel rail, a layer of inert polytetrafluoroethylene coating which does not react with gallium is sprayed on the surface of the material blocking rod in contact with gallium beads, and the fixing seat 342 is of a lifting seat structure, so that the height of the material blocking rod 34 relative to a conveying plane can be adjusted, and the material blocking rod is suitable for gallium beads with different particle sizes.

The specific process of this example for producing high purity gallium beads is described in detail below.

First, a molten high-purity gallium liquid 100 is poured into the gallium storage tank 12 and the dropping funnel 11, and the respective heat insulating layers are opened to maintain the gallium liquid 100 at a liquefied temperature. When producing gallium beads, the control valve 14 on the dropping liquid pipe 13 is opened to adjust the flow rate, so that the amount of the gallium liquid added into the large box 121 of the gallium storage box 12 by the dropping funnel 11 is consistent with the amount of the gallium liquid flowing out from the pump pipe 21.

The gallium storage box 12 and the dropping funnel 11 are made of stainless steel, the part of the inner wall which is contacted with the gallium liquid is completely sprayed with clean inert material polytetrafluoroethylene, so that the gallium liquid is prevented from being polluted, and the control valve 14 is made of polytetrafluoroethylene material; the heat-insulating layers are wrapped outside the gallium storage box 12 and the dropping funnel 11 and are electrically heated, and the temperature of the gallium liquid is regulated and controlled by a control system; the volume of the large box 121 in the gallium storage box 12 is at least ten times that of the small box 122, the large box is connected with the small box through the communicating port 123 at the bottom, and the gallium liquid level in the small box 122 can be relatively stable and consistent in the production process through the communicating vessel principle.

Then, the cold coagulation block 32 is started to refrigerate, and the conveying motor 33 is started to convey the conveying belt 31 at a certain speed; connecting a pump pipe 21 to a discharge valve 15 of a conical discharge hole at the bottom of a small box 122 of a gallium storage box 12, closing the discharge valve 15, enabling the pump pipe 21 to penetrate through a peristaltic pump 22 to ensure that the pump pipe 21 has certain pressure and elasticity, starting the peristaltic pump 22 after opening the discharge valve 15, adjusting the rotating speed of the peristaltic pump 22, and driving gallium liquid sections 101 formed at intervals in the pump pipe 21 to drip at the tail end of the pump pipe 21 at intervals of spherical gallium liquid drops 200 due to surface tension.

The pump pipe 21 is made of clean PVC material with certain elasticity and stretching degree, and the discharge valve 15 is made of clean PTFE material.

The conveying motor 33 and the condensing block 32 are started, gallium liquid drops 200 dripped from the pump pipe 21 are slowly condensed into solid gallium beads 201 on the conveying belt 31 under the condensing action of the condensing block 32, the height of the material blocking rod 34 is adjusted, the solid gallium beads are loosened and collected by the material blocking rod 34 at the tail end of the conveying belt 31 and enter the material receiving barrel 4, the material receiving barrel 4 is a plastic barrel or a stainless steel barrel, and a layer of clean inert material polytetrafluoroethylene is sprayed on the surface of the contact part of the inner wall and the gallium beads.

The technical effect of the present invention will be described below with reference to a specific production example.

Examples of the invention

Injecting gallium liquid into the gallium storage box and the dropping funnel, maintaining the relative height of the gallium liquid in the gallium storage box to be 10cm, opening the heat insulation layers of the gallium storage box and the dropping funnel, and keeping the liquid temperature at 38 ℃. Pressing an ID1.2mm PVC pump pipe on the peristaltic pump, adjusting the distance between a discharge port at the tail end of the pump pipe and the conveyor belt to be 8mm, and setting the rotating speed of the peristaltic pump to be 5 rmp; starting the cold coagulation blocks on the conveyor belt, and setting the refrigeration temperature to be 4 ℃; starting a conveying motor, setting the rotating speed to be 1rmp, setting the relative horizontal speed to be 0.2m/min, and setting the unilateral length of a conveying belt to be 3 meters; and opening the discharge valve, starting the peristaltic pump, dripping the gallium liquid section in the pump pipe onto the cold coagulation block of the conveyor belt, condensing and conveying for 14 minutes, and collecting the solid gallium beads after passing through the material blocking rod. The upper parts of gallium bead particles generated after condensation are in a sphere-like shape, the small surfaces of the gallium bead particles form planes, the mass of a single gallium bead is 0.65g, the plus and minus of the single gallium bead is 0.1g, the particle size is 0.6mm, the plus and minus of the single gallium bead is 0.1mm, and the requirement of a customer can be met.

It can be seen that the operation of producing high-purity gallium beads is simple, the batch automatic production can be realized, and the quality and the particle size of the high-purity gallium beads are controllable and have good uniformity.

The above embodiments describe the basic principles and main features of the present invention and the advantages of the present invention, and it should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only for the description of the specific working principle of the present invention, and without departing from the spirit and scope of the present invention, the present invention can also have various changes and improvements, and these changes and improvements all fall into the scope of the present invention, and the protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A high-purity gallium pearl apparatus for producing which characterized in that: comprises a gallium storage box, a pumping system and a condensation conveying system;

the pumping system comprises a pump pipe and a peristaltic pump arranged on the pump pipe, a feed port of the pump pipe is connected to the bottom of the gallium storage box, a discharge port of the pump pipe extends to the upper part of the condensation conveying system, and the peristaltic pump intermittently pumps gallium liquid in the gallium storage box to the condensation conveying system through the pump pipe;

the condensation conveying system comprises a conveying belt and a condensation block arranged on the conveying belt and used for receiving gallium liquid drops at a discharge port of the pump pipe, and the conveying tail end of the conveying belt is butted with a material receiving barrel used for collecting condensed gallium beads.

2. The device for producing the high-purity gallium beads as claimed in claim 1, wherein the gallium storage box comprises a large box and a small box, the bottoms of the large box and the small box are communicated with each other, the bottom of the small box is connected with a pump pipe, the large box is communicated with a dropping funnel for adding gallium liquid through a dropping pipe, and a control valve is arranged on the dropping pipe.

3. A high purity gallium bead production apparatus according to claim 2, wherein said large tank has a volume at least ten times that of said small tank.

4. The apparatus for producing high purity gallium bead as claimed in claim 2, wherein the outer walls of the gallium storage box and the dropping funnel are provided with heat insulating layers.

5. The apparatus for producing high purity gallium bead according to claim 1, wherein said cold coagulation block is a condensing agent, a cold chain or a semiconductor freezing block, and a plurality of said cold coagulation blocks are arranged at equal intervals along the conveying direction of the conveyor belt.

6. The apparatus for producing high purity gallium bead according to claim 5, wherein the pumping system comprises at least two pumping pipes connected to the gallium storage tank, the feeding ports of all the pumping pipes are provided with discharge valves, and the discharging ports of all the pumping pipes are arranged above the condensing block along the transverse direction of the conveyor belt.

7. The high-purity gallium bead production device according to claim 1, wherein a material blocking rod for shifting condensed gallium beads from the condensing block is further arranged at the conveying end of the conveying belt, the material blocking rod is obliquely arranged above the cold-condensed block relative to the conveying direction, the gap between the material blocking rod and the condensing block is smaller than the height of the condensed gallium beads, and the material collecting barrel is arranged close to the end of the material blocking rod.

8. The apparatus for producing high purity gallium bead according to claim 7, wherein the two material blocking rods are oppositely and obliquely arranged, and a conveying outlet is formed between the oblique ends of the two material blocking rods.

9. The apparatus for producing high purity gallium bead according to claim 1, wherein the gallium storage tank, the pumping system and the condensing and conveying system are provided with inert coating or made of inert material which does not react with gallium at the contact position with gallium.

10. The apparatus for producing high purity gallium beads according to any one of claims 1 to 9, wherein the conveyor motor of the conveyor belt is a speed regulating motor, and the rotation speed of the peristaltic pump and the rotation speed of the speed regulating motor are relatively constant.

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