CN111809245A - A kind of high-purity powder continuous purification device and method - Google Patents

Abstract

The invention relates to a continuous purification device and a continuous purification method for high-purity powder, belonging to the technical field of crystal material purification; the problems of low purification rate and low purification efficiency of the existing high-purity powder are solved; the technical scheme is as follows: the powder to be purified falls into a rotating disc connected with a driving device through a feeding device, a plurality of arc-shaped partition plates are arranged on the surface of the rotating disc in a radial mode and are sequentially arranged in a radial mode at the center of the rotating disc, a heater is located below the rotating disc, the rotating disc rotates automatically to enable the falling powder to fall into a material receiving groove through the edge of the rotating disc under the action of centrifugal force, and the heater is used for heating all the time in the whole process; the invention can realize the continuous production of the powder, increase the contact area of the powder with the process gas and the heating surface, reduce the time for the powder to enter and exit the furnace and raise the temperature, and obviously improve the purification efficiency and the purification effect.

Description

A kind of high-purity powder continuous purification device and method

technical field

The invention belongs to the technical field of crystal material purification, in particular to a high-purity powder continuous purification device and method.

Background technique

With the advancement of science and technology and the rapid development of the high-end manufacturing industry, the demand for high-end materials is increasing, including various high-purity powders, such as high-purity polysilicon, which is the raw material for solar photovoltaic cells and semiconductor integrated circuits. However, due to the demand for products, the requirements for the purity of high-purity powder are getting higher and higher, and the total impurity content has reached the PPM level. The existing powder purification method is to put the powder into a crucible, and then put the crucible and the powder together. It is purified in a high temperature furnace, and the efficiency of purifying powder in this way is very low, and it is difficult to meet the needs of production.

SUMMARY OF THE INVENTION

The invention overcomes the deficiencies of the prior art, and provides a continuous purification device and method for high-purity powder. The problem of low purification rate and slow purification efficiency of the existing high-purity powder is solved.

In order to achieve the above objects, the present invention is achieved through the following technical solutions.

A high-purity powder continuous purification device includes a feeding device, a rotating disc, a heater and a feeding chute, the feeding device is located above the rotating disc, and the powder to be purified falls into the rotating disc through the feeding device, and the rotating The surface of the disk is provided with a number of arc-shaped partitions, and the arc-shaped partitions are arranged radially from the center of the rotating disk. The heater is located below the rotating disk. The rotating disk is connected with a driving device for driving the rotating disk to rotate. force, and the feeding chute is provided below the outer edge of the rotating disc.

Preferably, the rotating disk is a circular structure with a horizontal surface.

Preferably, the arc-shaped partitions are arranged in a spiral radial shape at the center of the rotating disk, and a heating purification tank with openings at both ends is formed between two adjacent arc-shaped partitions.

Preferably, the feeding device includes a feeding funnel.

Preferably, the nozzle at the bottom of the feeding funnel is located just above the center of the rotating disc.

Preferably, the center of the rotating disc is provided with a conical material distribution head.

Preferably, the driving device includes a rotating shaft connected with the rotating disk, and the rotating shaft is driven to rotate by a motor.

Preferably, the rotating shaft is connected with the material distribution head.

Preferably, the heater is arranged on the lower surface of the rotating disk.

A high-purity powder continuous purification method using the high-purity powder continuous purification device, comprising the following steps: the powder to be purified falls into a rotating disk through a feeding device, and the rotating disk is driven by a driving device to rotate Under the action of centrifugal force, the powder falling into the rotating disk flows to the edge of the rotating disk through the heating and purification tank formed between the two adjacent arc-shaped partitions and falls into the receiving tank. The purification tank is heated and purified by the heater below, and the high-purity powder continuous purification device is under the process temperature and vacuum degree of powder purification.

The beneficial effects of the present invention relative to the prior art are as follows.

The device of the present invention can realize the continuous production of powder, reduce the time of powder entering and leaving the furnace and heating and cooling time, and improve the efficiency. The heater is arranged close to the lower part of the rotating disk, and the utilization rate of heat energy is higher. The powder is purified on the rotating disk, the rotating disk conducts heat to the powder, the contact area is large, the powder is very thin on the rotating disk, and the contact area with the process gas is large, which improves the purification effect. According to the purity requirements of powder purification, the blanking amount and rotation speed can be adjusted to realize the adjustability of the process. The purification process transitions from system purification to face system, which is convenient for the volatilization and elimination of impurities, and the purification efficiency and purification effect are significantly improved.

Description of drawings

FIG. 1 is a schematic structural diagram of the high-purity powder continuous purification device according to the embodiment of the present invention.

FIG. 2 is a partial enlarged view of FIG. 1 .

FIG. 3 is a front sectional view of FIG. 1 .

Among them, 1 is a feeding funnel, 2 is a rotating disk, 3 is a heater, 4 is a feeding tank, 5 is a rotating shaft, 6 is an arc-shaped partition, 7 is a heating and purification tank, and 8 is a material distributor.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. The technical solutions of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings, but the protection scope is not limited by this.

As shown in Figures 1 and 3, it is a continuous purification device for high-purity powder, including a feeding funnel 1, a rotating disc 2, a heater 3 and a feeding chute 4, wherein the rotating disc 2 is a circular shape with a horizontal surface Structure, the center of the rotating disk 2 is provided with a conical material distribution head 8, which is used to disperse the falling powder. As shown in FIG. 2 , the surface of the rotating disk 2 is provided with a number of arc-shaped partitions 6, and the arc-shaped partitions 6 are arranged in a spiral radial shape from the center of the rotating disk 2, and two adjacent arc-shaped partitions 6 form two Open-ended heating purification tank 7. The nozzle at the bottom of the feeding funnel 1 is located just above the center of the rotating disk 2 . The heater 3 is arranged close to the lower surface of the rotary disk 2, and a feeding chute 4 is connected below the heater 3. The outer edge of the feeding chute 4 exceeds the outer edge of the rotary disk 2, so that the The purified powder enters the feeding chute 4, and the bottom of the feeding head 8 is connected with a rotating shaft 5, which is driven to rotate by a motor, thereby driving the entire rotating disk 2 to rotate.

The specific powder purification process is as follows: the powder to be purified is added through the feeding funnel 1, and the powder falls into the rotating disk 2 through the feeding funnel 1. When the powder falls, it first contacts the feeding head 8, and then enters the feeding head. 8 dispersed into the heating and purification tank 7 between the arc-shaped partitions 6, the rotating shaft 5 connected to the bottom of the rotating disk 2 drives the rotating disk 2 to do a circular rotation through the connected motor (not shown in the figure), and the powder passes through the feeding The funnel 1 falls to the rotating disc 2 according to the process speed. After the powder falls to the rotating disc 2, it slowly flows to the blanking chute 4 by centrifugal force, and the heater 3 keeps heating during the whole process. The whole system operates in a high temperature and high vacuum environment or a high temperature environment filled with process gas.

The device realizes the continuous production of powder, reduces the time of powder entering and leaving the furnace, heating and cooling, and improves efficiency. The heater 3 is immediately below the rotating disk 2, and the utilization rate of heat energy is higher. The powder is purified on the rotating disk 2, the rotating disk 2 conducts heat to the powder, and the contact area is large, the powder is very thin on the rotating disk 2, and the contact area with the process gas is large, which improves the purification effect. According to the purity requirements of powder purification, the blanking amount and rotation speed can be adjusted to realize the adjustability of the process. The purification process transitions from system purification to face system, which is convenient for the volatilization and elimination of impurities, and the purification efficiency and purification effect are significantly improved.

The above content is a further detailed description of the present invention in combination with the specific preferred embodiments, and it cannot be considered that the specific embodiments of the present invention are limited to this. Below, some simple deductions or substitutions can also be made, all of which should be regarded as belonging to the invention and the scope of patent protection determined by the submitted claims.

Claims (10)

1. A high-purity powder continuous purification device, characterized in that it comprises a feeding device, a rotary disc (2), a heater (3) and a feeding chute (4), and the feeding device is located at the bottom of the rotary disc (2). Above, the powder to be purified falls into the rotating disk (2) through the feeding device. The surface of the rotating disk (2) is provided with several arc-shaped partitions (6), and the arc-shaped partitions (6) serve as the rotating disk (2). ) are radially arranged in their centers, the heaters (3) are located below the rotating disk (2), and the rotating disk (2) is connected with a driving device for generating a driving force for the rotation of the rotating disk (2). 2) The feeding chute (4) is provided below the outer edge. 2 . The high-purity powder continuous purification device according to claim 1 , wherein the rotating disk ( 2 ) is a circular structure with a horizontal surface. 3 . 3 . The device for continuous purification of high-purity powder according to claim 2 , wherein the arc-shaped partitions ( 6 ) are arranged in a spiral radial shape at the center of the rotating disk ( 2 ), and two adjacent ones are arranged in turn. 4 . A heating purification tank (7) with openings at both ends is formed between the arc-shaped partitions (6). 4. A continuous purification device for high-purity powder according to any one of claims 1-3, wherein the feeding device is a feeding funnel (1). 5 . The device for continuous purification of high-purity powder according to claim 4 , wherein the nozzle at the bottom of the feeding funnel ( 1 ) is located just above the center of the rotating disk ( 2 ). 6 . 6 . The device for continuous purification of high-purity powder according to claim 5 , wherein a conical material distribution head ( 8 ) is arranged in the center of the rotating disk ( 2 ). 7 . 7. A high-purity powder continuous purification device according to claim 6, characterized in that the driving device comprises a rotating shaft (5) connected to the rotating disk (2), the rotating shaft (5) Driven by the motor to rotate. 8 . The device for continuous purification of high-purity powder according to claim 7 , wherein the rotating shaft ( 5 ) is connected with the material distribution head ( 8 ). 9 . 9 . The device for continuous purification of high-purity powder according to claim 1 or 8 , wherein the heater ( 3 ) is arranged on the lower surface of the rotating disk ( 2 ). 10 . 10. A method for continuous purification of high-purity powder using the device for continuous purification of high-purity powder according to claim 1, characterized in that it comprises the following steps: the powder to be purified falls into the rotating disc (2) through the feeding device , the rotating disk (2) is driven by the driving device to rotate, and the powder falling into the rotating disk (2) is formed between two adjacent arc-shaped partitions (6) under the action of centrifugal force. The heating and purification tank (7) flows to the edge of the rotating disc and falls into the receiving tank (4). The powder is heated and purified by the heater (3) below when passing through the heating and purification tank (7). The powder continuous purification device is under the process temperature and vacuum degree of powder purification.

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