CN220759223U - Charging structure and pelletization device - Google Patents

Abstract

The utility model belongs to the technical field of high-purity antimony processing equipment, and relates to a feeding structure and a granulating device. The charging structure comprises: a melting pipe arranged in a vertical direction; further comprises: the material feeding bin is filled with protective gas, and the upper end of the melting material pipe extends into the material feeding bin; and the pipe cover is arranged in the feeding bin and is used for opening and closing the melting pipe. According to the utility model, the solid high-purity antimony can be stored in the feeding bin by arranging the feeding bin, and the environment for isolating air is provided for the high-purity antimony stored in the feeding bin by the protective gas. Thereby realizing a small amount of repeated feeding, preventing oxidation loss and avoiding air entering the granulating device. The utility model also provides a granulating device adopting the feeding structure.

Description

Charging structure and pelletization device

Technical Field

The utility model belongs to the technical field of high-purity antimony processing equipment, and relates to a feeding structure and a granulating device.

Background

High purity antimony is a generic term for 5N and above purity antimony, and high purity antimony and antimony metal compounds are ideal materials for the production of semiconductors and thermoelectric devices.

In the preparation process of indium antimonide or gallium antimonide, each element needs to be fed according to strict proportion; in the process of using high-purity antimony as a doping agent, the addition of antimony also has strict weight requirements, so that the high-purity antimony ingot is prepared into 0.5-5 mm antimony particles, the purpose of accurate weighing can be achieved, and the use of high-purity antimony is convenient.

In the prior art, the high-purity antimony granulating equipment has the following defects:

1. because the saturated vapor pressure of antimony is low, a large amount of antimony is melted once, the pipeline is easily blocked by volatilization of antimony, and the risk of ring installation exists;

2. the single-batch granulating amount is small, in order to improve the production efficiency, a multi-batch granulating mode is generally adopted, and multi-batch granulating is realized through repeated feeding, but in the prior art, a cover-opening feeding mode is adopted, and antimony is easily oxidized in the feeding process;

3. the granulating crucible is a single-hole quartz crucible, the aperture is smaller than 1mm, the dripping speed is low, the antimony liquid can not drip out completely, and the crucible can be damaged when being cooled;

4. discharging from the furnace after granulating is completed is difficult.

Disclosure of Invention

The utility model aims to solve the technical problems that: aiming at the technical problems in the background technology, the feeding structure is provided, which can isolate air to prevent antimony oxidation, and can throw solid high-purity antimony in batches, so as to avoid the volatilization of the high-purity antimony and the blockage of a pipeline. Still provide a pelletization device including above-mentioned reinforced structure.

The technical scheme provided by the utility model is as follows:

a charging structure comprising: a melting pipe arranged in a vertical direction;

further comprises: the material feeding bin is filled with protective gas, and the upper end of the melting material pipe extends into the material feeding bin;

and the pipe cover is arranged in the feeding bin and is used for opening and closing the melting pipe.

Optionally, the feeding bin is a glove box or an ultra-clean workbench.

A pelletising device comprising the charging structure of any one of the preceding claims, further comprising:

the air inlet is connected to the outer side wall of one end of the melting pipe extending out of the feeding bin, and is communicated with the inner cavity of the melting pipe;

the device comprises a first heater and a melting crucible, wherein the first heater is used for heating a melting pipe, the melting crucible is arranged in the melting pipe, and the melting crucible is provided with at least one material dropping hole;

the upper end of the drop pipe is connected with the lower end of the melting pipe in a sealing way, the drop pipe is provided with a cooling liquid inlet and a cooling liquid outlet, and the cooling liquid in the drop pipe has a temperature gradient decreasing from top to bottom.

Optionally, the method further comprises:

and the second heater is used for heating the drop tube.

Optionally, the second heater is a heat tracing band, the length of the heat tracing band is 10-20 cm, and the heating temperature is 80-100 ℃.

Optionally, the method further comprises:

the collecting bottle is detachably connected to the lower end of the dropping pipe.

Optionally, the method further comprises:

the collecting bottle is arranged on the upper end face of the lifting table.

Optionally, the collecting bottle is a pin with a capacity of 3-8L.

Optionally, the diameter of the material dripping holes is 0.5-2.0 mm, and the number of the material dripping holes is 4-8.

Optionally, the method further comprises:

the mounting bracket, add feed bin, melt pipe, first heater, drip the material pipe and all fix one side of mounting bracket.

Compared with the prior art, the utility model has the beneficial effects that:

according to the feeding device, the feeding bin is arranged, so that solid high-purity antimony can be stored in the feeding bin, and the environment for isolating air is provided for the high-purity antimony stored in the feeding bin through the protective gas, so that a small amount of repeated feeding is realized on the premise that the high-purity antimony is not oxidized, oxidation loss of the high-purity antimony can be prevented, and air can be prevented from entering the granulating device. The granulating device provided by the utility model has the advantages of simple discharging, convenience in operation and the like.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a top view of the present utility model;

FIG. 3 is a schematic view of a lifting platform according to the present utility model;

FIG. 4 is a top view of a melting crucible of the present utility model;

FIG. 5 is a cross-sectional view of a melting crucible of the present utility model.

In the figure: 1. a lifting table; 2. a collection bottle; 3. a cooling liquid inlet; 4. a material dropping pipe; 5. a second heater; 6. a cooling liquid outlet; 7. an air inlet; 8. a melting pipe; 9. a first heater; 10. a tube cover; 11. a feeding bin; 12. a mounting frame; 13. a melting crucible; 14. and a dropping hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

Referring to fig. 1 and 2, a charging structure includes: a melt pipe 8, the melt pipe 8 being arranged in a vertical direction;

further comprises: the feeding bin 11 is filled with protective gas, and the upper end of the melting pipe 8 extends into the feeding bin 11;

the tube cover 10, tube cover 10 sets up in the reinforced storehouse 11 for switching melt pipe 8, and the tube cover 10 outer wall is equipped with the handle.

As a further scheme, the feeding bin 11 is a glove box or an ultra clean bench. By adopting a glove box or an ultra clean bench, the melting pipe 8 can be opened or closed by moving the pipe cover 10 in the feeding bin 11 according to the requirement, and when the melting pipe 8 is opened, a predetermined amount of solid high-purity antimony can be put into the melting pipe 8.

There are various ways of filling the charging bin 11 with the shielding gas, for example, a shielding gas inlet and a shielding gas outlet are provided on the charging bin 11, the shielding gas enters from the gas inlet, and the gas in the charging bin 11 is replaced from the shielding gas outlet.

Because the gas inlet 7 is arranged on the melting pipe 8, a protective gas inlet is not arranged, the protective gas can enter the feeding bin 11 from the gas inlet 7 of the melting pipe 8, and then the gas in the feeding bin 11 is replaced from the protective gas outlet.

Obviously, the quantitative conveying device can be arranged in the feeding bin 11 instead of manual operation (a glove box or an ultra-clean workbench is not needed after the scheme is adopted). Correspondingly, a linear driving device (any one of an air cylinder, a hydraulic cylinder and an electric telescopic rod) is connected to the pipe cover 10, the pipe cover 10 is directly pushed to move up and down by the linear driving device to open and close the melt pipe 8, one side of the pipe cover 10 can be hinged to the melt pipe 8, and the pipe cover 10 can be opened and closed by adopting a connecting rod mechanism and the linear driving device.

The quantitative conveying device can be realized in such a way that a square pipe or a concave plate is arranged in the feeding bin 11, an opening of the square pipe or the concave plate corresponds to the melting pipe 8, a push plate pushed by a linear driving device is arranged in a groove of the square pipe or the concave plate, a preset amount of solid high-purity antimony is placed in the groove of the square pipe or the concave plate, the melting pipe 8 is opened at intervals according to requirements, and then the linear driving device is sequentially started to push the solid high-purity antimony in the single square pipe or the concave plate into the melting pipe 8.

The feeding bin 11 is made of high-temperature resistant clean material, and can be specifically made of stainless steel or glass plate by welding. The feeding bin 11 made of stainless steel is provided with a transparent observation window, so that feeding operation is facilitated. The melting pipe 8 and the pipe cover 10 are made of a material which is resistant to high temperature and does not react with the material, such as quartz glass or graphite.

Example 2

Specifically illustrated is a granulating device employing the above-mentioned charging structure.

Referring to fig. 1-5, a granulating apparatus, including a charging structure as described in any one of the above, further includes:

the air inlet 7 is connected to the outer side wall of one end of the melt pipe 8 extending out of the feeding bin 11, and the air inlet 7 is communicated with the inner cavity of the melt pipe 8;

a first heater 9 and a melt crucible 13, the first heater 9 being used for heating the melt pipe 8, the melt crucible 13 being arranged in the melt pipe 8, the melt crucible 13 being provided with at least one drip hole 14;

the upper end of the drop tube 4 is connected with the lower end of the melting tube 8 in a sealing way, the drop tube 4 is provided with a cooling liquid inlet 3 and a cooling liquid outlet 6, and the cooling liquid in the drop tube 4 has a temperature gradient decreasing from top to bottom.

The first heater 9 may be disposed outside the melt tube 8, within the wall of the melt tube 8, or inside the wall of the melt tube 8. Depending on the material and thickness of the melt tube 8.

The material is melted in the crucible and then dripped into the drip pipe 4 through the drip hole 14, and is condensed into granules through the cooling liquid. The cooling liquid adopts a mode that the temperature gradient is gradually decreased from top to bottom, which is beneficial to improving the roundness of the prepared particles.

The cooling liquid can be pure water.

As a further solution, a second heater 5 is also provided, said second heater 5 being used for heating the drip tube 4. The heated drip tube 4 heats the cooling liquid by means of heat transfer.

The second heater 5 is arranged, so that the temperature gradient decreasing from top to bottom can be formed, the antimony particles are round, the surface is bright, shrinkage holes are avoided, and the granularity is uniform.

The second heater 5 is arranged outside the drop tube 4, in the wall of the drop tube 4 or on the inner wall of the drop tube 4. The second heater 5 and the first heater 9 may use convection heating, radiation heating, conduction heating, etc. to heat the outside of the drop tube 4, for example, graphite heating, resistance wire heating, halogen tube heating, induction heating, infrared heating, electromagnetic induction heating, electrothermal film heating, microwave heating, etc.

Considering the heating temperature requirement, the first heater 9 is preferably an electric heating jacket, and the second heater 5 is preferably a heat tracing band.

As a preferable scheme, the second heater 5 is a heat tracing band, the length of the heat tracing band is 10-20 cm, the heating temperature is 80-100 ℃, and the heat tracing band is tightly attached to the outer wall of the drop tube 4 in a spiral winding mode when the drop tube is specifically installed.

In order to ensure that a temperature gradient is formed which decreases in sequence from top to bottom, the pitch of the upper heat trace is smaller than the pitch of the lower heat trace.

As a further scheme, there are various ways of arranging the cooling liquid outlet 6 and the cooling liquid inlet 3, for example, the cooling liquid outlet 6 and the cooling liquid inlet 3 are horizontally and symmetrically arranged on the outer side wall of the drop tube 4, and the cooling liquid outlet 6 and the cooling liquid inlet 3 can also be arranged at intervals along the vertical direction.

Preferably, the coolant outlet 6 is located at the upper side of the coolant inlet 3.

As a further solution, a mounting frame 12 is further provided, and the feeding bin 11, the melt pipe 8, the first heater 9 and the drip pipe 4 are all fixed on one side of the mounting frame 12. The pelletization device can be installed and fixed in the vertical direction by the installation frame 12.

As a further alternative, as shown in fig. 4 and 5, the diameter of the drip holes 14 is 0.5-2.0 mm, and the number of the drip holes 14 is 4-8. The diameter of the drip holes 14 is preferably 0.5mm, and the number of drip holes 14 is preferably 5. The use of a plurality of drip holes 14 increases the pelletization efficiency.

Wherein: the melting pipe 8 and the drip pipe 4 are fixed on one side of the mounting frame 12 by adopting a clamping hoop mode, and the first heater 9 and the feeding bin 11 can be fixed on one side of the mounting frame 12 by adopting a bolting mode. Obviously, the manner of fixing the feeding bin 11, the melt pipe 8, the first heater 9 and the drip pipe 4 is not limited to the above manner, and other manners of mounting and fixing can be adopted according to the materials and the assembly and disassembly requirements of the parts to be fixed.

The effect of mounting bracket 12 is fixed equipment on the one hand, and on the other hand, because the position of feeding structure is higher, the operator stands on mounting bracket 12, can be convenient carry out the feeding.

Example 3

The collection mode of the high-purity antimony particles was further improved on the basis of example 2.

A collecting bottle 2 is also arranged, and the collecting bottle 2 is detachably connected with the lower end of the drop tube 4. Through detachable connection's collecting bottle 2, during the ejection of compact, only need with collecting bottle 2 and the separation of material dripping pipe 4, can accomplish the ejection of compact. And can change another collecting bottle 2, continue production, change convenient, rapidly.

As a further solution, the collecting bottle 2 is detachably connected with the drip tube 4 through a quick connector.

As a further alternative, as shown in fig. 1 and 3, a lifting table 1 is further provided, and the collection bottle 2 is provided on an upper end surface of the lifting table 1. It should be noted that, the lifting platform 1 is a platform with adjustable height, and its power can be realized by using hydraulic pressure, pneumatic pressure, electric telescopic rod or motor to drive rack.

As a preferable scheme, a clamping groove can be arranged on the lifting platform 1 for installing and fixing the collecting bottle 2.

As a further alternative, the collection bottle 2 is a pin having a capacity of 3 to 8L.

When in specific use, the method comprises the following steps:

1. the cooling liquid inlet 3 is opened, cooling liquid enters the collecting bottle 2, and when the volume of the cooling liquid reaches a preset amount, excessive cooling liquid is discharged from the cooling liquid outlet 6, and at the moment, the cooling liquid inlet 3 and the cooling liquid outlet 6 are closed.

2. Then, the tube cover 10 and a valve connected with the air inlet 7 are opened, and protective gas is introduced to replace the gas in the melt tube 8, and the argon flow is regulated to be 4L/min for 10min.

3. The opening at the upper end of the melting tube 8 is further sealed by a tube cover 10.

4. Opening a protective gas inlet and a protective gas outlet of the feeding bin 11, regulating the flow of argon to be 4L/min, and replacing for 20min; placing solid high-purity antimony to be granulated into a charging bin 11, continuously introducing argon into the charging bin 11, replacing for 10min at the argon flow of 4L/min, and reducing the argon flow or closing the argon (selected according to the sealing performance of the charging bin 11).

5. Adding a certain amount of antimony blocks into a melting crucible 13, starting a power supply of a heating sleeve (a first heater 9) to start heating, wherein the heating temperature is 800 ℃; meanwhile, the power supply of the heat tracing belt (the second heater 5) is turned on to preheat the pure water, and the preheating temperature is 90 ℃. When antimony particles start to drop, the power supply of the heat tracing belt is turned off, and the material begins to drop.

6. After the granulation is completed, the drip tube 4 is emptied from the cooling liquid inlet 3, then the flange at the joint of the drip tube 4 and the collecting bottle 2 is disassembled, the lifting platform 1 is operated, the collecting bottle 2 is integrally moved to the outside of the granulation equipment, a new collecting bottle 2 is replaced, and the granulation of the next batch is restarted.

In the fourth step, part of air may be introduced during the process of adding high-purity antimony by opening the adding bin 11, and argon is continuously introduced to discharge the part of air.

It should be noted that, the feeding chamber 11 and the melt pipe 8 are isolated from air by a protective gas, and the protective gas cannot react with the material to be produced. Specifically, the high-purity antimony particles may be selected from nitrogen, carbon dioxide, and inert gases, and argon is preferable when producing high-purity antimony particles.

The equipment can be used for producing granular products such as high-purity lead, high-purity tin, high-purity zinc, high-purity cadmium, high-purity indium and the like.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A charging structure comprising:

a melt pipe (8), the melt pipe (8) being arranged in a vertical direction;

characterized by further comprising:

the feeding bin (11), the protective gas is filled in the feeding bin (11), and the upper end of the melt pipe (8) extends into the feeding bin (11);

and the pipe cover (10) is arranged in the feeding bin (11) and used for opening and closing the melt pipe (8).

2. The charging structure according to claim 1, characterized in that the charging bin (11) is a glove box or an ultra clean bench.

3. A pelletising device comprising the charging structure of claim 1 or 2, further comprising:

the air inlet (7) is connected to the outer side wall of one end of the melt pipe (8) extending out of the feeding bin (11), and the air inlet (7) is communicated with the inner cavity of the melt pipe (8);

a first heater (9) and a melting crucible (13), wherein the first heater (9) is used for heating the melting pipe (8), the melting crucible (13) is arranged in the melting pipe (8), and the melting crucible (13) is provided with at least one material dropping hole (14);

the upper end of the drip pipe (4) is connected with the lower end of the melting pipe (8) in a sealing way, the drip pipe (4) is provided with a cooling liquid inlet (3) and a cooling liquid outlet (6), and the cooling liquid in the drip pipe (4) has a temperature gradient decreasing from top to bottom.

4. A granulation device as defined in claim 3, further comprising:

and the second heater (5) is used for heating the drop tube (4).

5. The granulation apparatus as claimed in claim 4, characterized in that said second heater (5) is a heat tracing band having a length of 10-20 cm and a heating temperature of 80-100 ℃.

6. A granulation device as defined in claim 3, further comprising:

the collecting bottle (2), the collecting bottle (2) can be dismantled and be connected in the lower extreme of dropping pipe (4).

7. The granulation device as set forth in claim 6, further comprising:

the collecting bottle (2) is arranged on the upper end face of the lifting table (1).

8. The granulation apparatus as claimed in claim 6, characterized in that said collection bottle (2) is a pin with a capacity of 3-8L.

9. A granulation device according to claim 3, characterized in that the diameter of the drop holes (14) is 0.5-2.0 mm, the number of drop holes (14) being 4-8.

10. A granulation device as defined in claim 3, further comprising:

the feeding bin (11), the melt pipe (8), the first heater (9) and the drip pipe (4) are all fixed on one side of the mounting frame.