Continuous feeding device for fused quartz processing

By introducing an embedded heat exchange coil and a feeding disc into the fused silica processing device, the problems of uneven silicon powder feeding and insufficient thermal management were solved, achieving efficient preheating and uniform feeding of silicon powder, and improving the stability and production efficiency of the melting process.

CN224199278UActive Publication Date: 2026-05-05DONGHAI HECHUANG SILICON MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DONGHAI HECHUANG SILICON MATERIAL CO LTD
Filing Date
2025-04-15
Publication Date
2026-05-05

AI Technical Summary

Technical Problem

Traditional silicon micropowder feeding devices suffer from problems such as material agglomeration, insufficient heat management, and poor feeding continuity, which affect the stability and efficiency of fused silica processing.

Method used

A continuous feeding device was designed, which includes an inner hopper with an embedded heat exchange coil and a feeding disc. The device uses high-temperature flue gas to preheat silicon powder and disperses the material through the feeding disc. Combined with a ceramic fiber heat insulation board structure, it ensures uniform feeding of the material.

Benefits of technology

This technology enables efficient preheating and uniform feeding of silicon micropowder, reduces energy consumption, and improves the stability of the melting process and product consistency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a continuous feeding device for fused quartz processing. The continuous feeding device comprises an outer hopper, an inner hopper, a heat preservation disc, a secondary hopper and a power mechanism, the inner hopper is embedded in the outer hopper, the heat exchange coil pipe is embedded in the inner wall of the inner hopper, high-temperature flue gas of the melting furnace or an external heat source can be used for preheating silica powder / quartz sand, follow-up melting energy consumption is reduced, and fine impurities can be removed at high temperature. The secondary hopper is connected with the heat preservation disc through the discharging pipe, the power mechanism drives the material stirring shaft to drive the inclined material stirring disc to rotate, materials are scattered and evenly thrown into the inner hopper, and agglomeration is effectively prevented. The heat preservation plate is matched with the ceramic fiber heat insulation plate, and heat loss is reduced. The device integrates preheating, impurity removal and uniform feeding, is compact in structure, and remarkably improves the fused quartz processing efficiency and the product quality.
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Description

Technical Field

[0001] This utility model relates to the field of fused silica processing technology, specifically a continuous feeding device for fused silica processing. Background Technology

[0002] In the fused silica processing, the feeding stage of silica micropowder (SiO2 micropowder) has a significant impact on product quality and production efficiency. Traditional feeding devices typically employ a simple hopper structure, relying on gravity for natural feeding or mechanical vibration-assisted conveying. However, these devices suffer from the following technical drawbacks in practical applications:

[0003] (1) Material agglomeration problem: The silicon micro powder particles are small and easily absorb moisture and clump together, resulting in uneven feeding and even blockage of pipes, affecting the stability of the melting process;

[0004] (2) Insufficient thermal management: Fused quartz processing is usually carried out in a high-temperature environment, but traditional hoppers lack preheating or insulation structures and cannot utilize existing thermal energy such as the high-temperature exhaust gas of quartz furnaces as a heat exchange medium for preheating. This results in a large amount of energy being consumed for melting after the silicon micropowder is fed into the furnace at room temperature.

[0005] (3) Poor feeding continuity: Intermittent feeding method is difficult to match the needs of modern continuous production line, which can easily cause fluctuations in materials in the melting furnace and affect product consistency;

[0006] Currently, we are improving existing silicon micro powder feeding equipment to meet the requirements for continuous feeding and preheating of silicon micro powder. Utility Model Content

[0007] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a continuous feeding device for molten quartz processing that can preheat silica powder / quartz sand before melting and break it up during the preheating process.

[0008] The technical problem to be solved by this utility model is achieved through the following technical solution: a continuous feeding device for fused silica processing, comprising;

[0009] The outer hopper has a through hole at its bottom;

[0010] The inner hopper is embedded inside the outer hopper. A feeding port is provided at the top of the inner hopper. A heat exchange coil is embedded on the inner wall of the inner hopper. The inlet and outlet of the heat exchange coil extend to the outside of the inner and outer hoppers. The bottom of the inner hopper has a silicon micro powder discharge pipe extending to the through hole.

[0011] The insulation tray has a threaded connection between the inner circumference of its bottom and the outer circumference of its top, and an installation port is provided in the middle of the insulation tray.

[0012] The secondary hopper has a feed pipe fixedly installed at its bottom, and the outlet flange of the feed pipe is connected to the top edge of the mounting port of the insulation plate.

[0013] The power mechanism base is fixed to the outer wall of the feeding pipe. A feeding shaft is installed on the top of the power mechanism base. The bottom of the feeding shaft passes through the side wall of the feeding pipe into the inner hopper. A feeding disc is fixedly installed at an angle at the bottom of the feeding shaft. A rotary power mechanism is installed on the bottom of the power mechanism base. The power output end of the rotary power mechanism is connected to the feeding shaft for transmission, thereby dispersing and scattering the silicon micro powder falling from the feeding pipe into the inner hopper.

[0014] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the continuous feeding device for fused silica processing described above has a ceramic fiber heat insulation plate fixedly installed on the top surface of the heat insulation plate, which is connected to the installation port in the middle.

[0015] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the continuous feeding device for fused silica processing described above, wherein the ceramic fiber heat insulation plate is further provided with several bolt holes for flange connection between the feeding pipe and the heat insulation plate.

[0016] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the continuous feeding device for fused silica processing described above has a bearing seat on the top of the power mechanism base, and the top end of the feeding shaft is mounted on the bearing seat.

[0017] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the continuous feeding device for fused silica processing described above has an external gear fixed on the outer circumferential surface of the feeding shaft located below the bearing seat, and the power output end of the rotary power mechanism is driven by the external gear tooth belt.

[0018] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the continuous feeding device for fused silica processing described above has a rotary bearing fixedly installed on the outer circumferential surface of the feeding shaft located below the external gear, and an installation hole for installing the rotary bearing is opened on the outer wall of the feeding tube, and the outer ring of the rotary bearing is fixed on the inner circumferential surface of the installation hole.

[0019] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the continuous feeding device for fused silica processing described above, wherein the angle between the feeding disc and the horizontal plane is 15~25°.

[0020] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the continuous feeding device for fused silica processing described above is further provided with an impulse flow meter connected by a flange between the bottom of the secondary hopper and the top of the feed pipe.

[0021] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the continuous feeding device for fused silica processing described above has several support legs at the bottom of the outer hopper.

[0022] Compared with the prior art, the beneficial technical effects of this utility model are:

[0023] (1) The heat exchange coil is embedded in the inner hopper, which can use the high temperature flue gas of the melting furnace or the external heat source to heat the silicon micro powder / quartz sand, thereby achieving the preheating effect before melting, reducing the intensity of subsequent melting operations and reducing energy consumption. At the same time, high temperature preheating can also remove the fine impurities mixed in the silicon micro powder / quartz sand at high temperature, achieving the effect of impurity removal to a certain extent.

[0024] (2) The material feeding disc rotates under the drive of the rotary power mechanism to disperse and evenly spread the falling silicon micro powder / quartz sand, avoid material agglomeration, and ensure the stability of the subsequent melting process;

[0025] (3) The double insulation structure of ceramic fiber insulation board and insulation plate can reduce the heat loss of the top of the outer hopper and the inner hopper and maintain the preheating temperature of the material. Its structural design is reasonable. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the main structure of this utility model before installation;

[0027] Figure 2 This is a schematic diagram of the main structure of the present invention after installation;

[0028] Figure 3 for Figure 2 A magnified schematic diagram of the local structure;

[0029] Figure 4 This is a schematic diagram of the side structure of the feeding disc.

[0030] In the diagram: 1. Outer hopper; 2. Inner hopper; 3. Feed port; 4. Heat exchange coil; 5. Silica powder discharge pipe; 6. Insulation plate; 7. Ceramic fiber insulation board; 8. Secondary hopper; 9. Discharge pipe; 10. Power mechanism base; 11. Feeding shaft; 12. Feeding disc; 13. Bearing seat; 14. Rotary bearing; 15. Rotary power mechanism; 16. External gear; 17. Impulse flow meter; 18. Support leg. Detailed Implementation

[0031] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0032] Example 1, referring to Figure 1-4 A continuous feeding device for fused silica processing includes;

[0033] The outer hopper 1 is formed in a generally funnel-shaped structure, and the bottom of the outer hopper 1 has a through hole, which is a circular through hole;

[0034] The inner hopper 2 is roughly funnel-shaped and is embedded in the outer hopper 1. A feeding port 3 is provided at the top of the inner hopper 2. A heat exchange coil 4 is embedded in the inner wall of the inner hopper 2. The diameter of the heat exchange coil 4 can be selected according to the usage requirements. The heat exchange coil 4 and the inner hopper 2 are integrated into one design, which has high heat exchange efficiency and does not affect the material flow. The inlet and outlet of the heat exchange coil 4 extend to the outside of the inner hopper 2 and the outer hopper 1. The bottom of the inner hopper 2 has a silicon micro powder discharge pipe 5 extending to the through hole.

[0035] The inner hopper 2 is embedded with a heat exchange coil 4, which can use the high-temperature flue gas of the melting furnace or an external heat source to heat the silicon micro powder / quartz sand, thereby achieving a preheating effect before melting, reducing the intensity of subsequent furnace melting operations, and reducing energy consumption. At the same time, high-temperature preheating can also remove the fine impurities mixed in the silicon micro powder / quartz sand at high temperature, achieving a certain degree of impurity removal effect.

[0036] The heat preservation plate 6 is formed into a roughly disc-shaped cover structure. The bottom inner circumferential surface of the heat preservation plate 6 is threadedly connected to the top outer circumferential surface of the outer hopper 1. An installation port is opened in the middle of the heat preservation plate 6. The installation port is a circular through hole. A ceramic fiber heat insulation plate 7 with the middle part communicating with the installation port is fixedly installed on the top surface of the heat preservation plate 6. It is formed into a roughly ring-shaped plate.

[0037] The secondary hopper 8 has a feed pipe 9 fixedly installed at its bottom. The feed pipe 9 is a tube structure with an inclined middle and vertical ends. The inclination angle of the inclined part can be selected according to the usage requirements, for example, it is set at an angle of 40~50° with the horizontal plane. The feed shaft is inserted through the inclined part of the feed pipe 9. The flange at the outlet end of the feed pipe 9 is connected to the top edge of the mounting port of the insulation plate 6. The flange connection structure facilitates installation and maintenance, while ensuring sealing and preventing dust leakage. The aforementioned ceramic fiber insulation board 7 also has several bolt holes for flange connection between the feed pipe 9 and the insulation plate 6. The number of holes can be selected according to the usage requirements.

[0038] The power mechanism base 10 is fixed to the outer wall of the feed tube 9 and is formed into a roughly square plate structure. Its shape can be selected according to the usage requirements. A feeding shaft 11 is installed on the top of the power mechanism base 10. The feeding shaft 11 is formed into a roughly shaft-shaped structure. The bottom of the feeding shaft 11 passes through the side wall of the feed tube 9 into the inner hopper 2. A feeding disc 12 is fixedly installed at the bottom end of the feeding shaft 11 at an angle. The feeding disc 12 is formed into a roughly disc-shaped structure. The angle between the feeding disc 12 and the horizontal plane is 15~25°. The specific angle can be selected according to the usage requirements.

[0039] The top of the power mechanism base 10 has a bearing seat 13. The bearing seat 13 is an existing technology and can be selected according to the usage requirements. The top of the feeding shaft 11 is installed on the bearing seat 13. A rotary bearing 14 is fixed on the outer circumferential surface of the feeding shaft 11 located below the external gear. An installation hole for the rotary bearing 14 is opened on the outer wall of the feeding tube 9. The installation hole is a circular through hole. The outer ring of the rotary bearing 14 is fixed on the inner circumferential surface of the installation hole. The feeding shaft 11 is supported by the bearing seat 13 and the rotary bearing 14, which makes the operation smooth and reduces vibration and wear.

[0040] A rotary power mechanism 15 is installed on the bottom of the power mechanism base 10. The rotary power mechanism 15 is an existing technology that can be selected according to the usage requirements, such as a rotary motor. The power output end of the rotary power mechanism 15 is connected to the feeding shaft 11. An external gear 16 is fixed on the outer circumferential surface of the feeding shaft 11 located below the bearing seat 13. The power output end of the rotary power mechanism 15 is connected to the external gear 16 for tooth belt drive, thereby breaking up and throwing the silicon micro powder falling from the feeding pipe 9 into the inner hopper 2.

[0041] The feeding disc 12 rotates under the drive of the rotary power mechanism 15, thereby breaking up and evenly spreading the falling silicon micro powder / quartz sand to avoid material agglomeration and ensure the stability of the subsequent melting process.

[0042] An impulse flow meter 17 is also connected by a flange between the bottom of the secondary hopper 8 and the top of the discharge pipe 9. The impulse flow meter 17 is an existing technology and can be selected according to the usage requirements. The secondary hopper 8 and the impulse flow meter 17 work together to realize real-time monitoring of material flow and ensure uniform feeding.

[0043] The bottom of the outer hopper 1 has several support legs 18, and the number of support legs 18 can be selected according to the usage requirements.

[0044] The continuous feeding device for fused silica processing described in Example 1 operates on the following principle:

[0045] First, prepare the equipment and check the connection status of each component to ensure that the outer hopper 1, inner hopper 2, and insulation plate 6 are securely installed. Connect the inlet of the heat exchange coil 4 to the heat source system, such as the filtered high-temperature flue gas pipe of the quartz furnace. After connection, the high-temperature flue gas from the quartz furnace enters the heat exchange coil 4 and heats the air inside the inner hopper 2. After heating for a certain period of time, add the silica powder / quartz sand raw material to the secondary hopper 8. Start the impulse flow meter 17 to monitor the feeding parameters. During the operation of the device, rotate... The power mechanism 15 drives the feeding shaft 11 to rotate the feeding disc 12. The rotation speed can be selected according to the usage requirements. The falling material is dispersed and scattered to form a uniform material curtain in the inner hopper 2. During this process, the material is fully in contact with the high-temperature heat exchange coil 4 and is heated. In this process, volatile impurities such as organic matter are decomposed and removed by high temperature. The preheated material is continuously output to the melting equipment through the silicon micro powder discharge pipe 5. The outlet of the heat exchange coil 4 can be connected to the pipeline in the plant area for centralized discharge of quartz furnace exhaust gas.

Claims

1. A continuous feeding device for fused silica processing, characterized in that: include; The outer hopper has a through hole at its bottom; The inner hopper is embedded inside the outer hopper. A feeding port is provided at the top of the inner hopper. A heat exchange coil is embedded on the inner wall of the inner hopper. The inlet and outlet of the heat exchange coil extend to the outside of the inner and outer hoppers. The bottom of the inner hopper has a silicon micro powder discharge pipe extending to the through hole. The insulation tray has a threaded connection between the inner circumference of its bottom and the outer circumference of its top, and an installation port is provided in the middle of the insulation tray. The secondary hopper has a feed pipe fixedly installed at its bottom, and the outlet flange of the feed pipe is connected to the top edge of the mounting port of the insulation plate. The power mechanism base is fixed to the outer wall of the feeding pipe. A feeding shaft is installed on the top of the power mechanism base. The bottom of the feeding shaft passes through the side wall of the feeding pipe into the inner hopper. A feeding disc is fixedly installed at an angle at the bottom of the feeding shaft. A rotary power mechanism is installed on the bottom of the power mechanism base. The power output end of the rotary power mechanism is connected to the feeding shaft for transmission, thereby dispersing and scattering the silicon micro powder falling from the feeding pipe into the inner hopper.

2. The continuous feeding device for fused silica processing according to claim 1, characterized in that: A ceramic fiber insulation board with a central section that runs through the installation opening is fixedly installed on the top surface of the insulation plate.

3. The continuous feeding device for fused silica processing according to claim 2, characterized in that: The ceramic fiber insulation board also has several bolt holes for connecting the feed pipe and the insulation plate to the flange.

4. The continuous feeding device for fused silica processing according to claim 1, characterized in that: The power mechanism base has a bearing seat on top, and the top end of the feeding shaft is mounted on the bearing seat.

5. The continuous feeding device for fused silica processing according to claim 4, characterized in that: An external gear is fixed on the outer circumferential surface of the feeding shaft located below the bearing seat, and the power output end of the rotary power mechanism is driven by the external gear tooth belt.

6. The continuous feeding device for fused silica processing according to claim 5, characterized in that: A rotary bearing is fixedly installed on the outer circumferential surface of the feeding shaft located below the external gear. An installation hole for installing the rotary bearing is opened on the outer wall of the feeding tube. The outer ring of the rotary bearing is fixed on the inner circumferential surface of the installation hole.

7. The continuous feeding device for fused silica processing according to claim 1, characterized in that: The angle between the feeding disc and the horizontal plane is 15~25°.

8. A continuous feeding device for fused silica processing according to any one of claims 1-7, characterized in that: An impulse flow meter is also flanged between the bottom of the secondary hopper and the top of the discharge pipe.

9. A continuous feeding device for fused silica processing according to claim 1, characterized in that: The bottom of the outer hopper has several support legs.